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Technical Notes
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Application of epoxy waterproofing containing bitumen for maintaining asphalt pavement on bridge
아스팔트 교면포장 유지보수시 에폭시 역청계 방수공법 적용사례
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Sungun Kim, Byungchul Jeong, Kwangmoon Lee, Daeho Kim
김성운, 정병철, 이광문, 김대호
- Damage to bridge pavement occurs in various forms such as rutting, cracks, potholes, and shoving. Rainfall penetrates into the crack and repeated …
- Damage to bridge pavement occurs in various forms such as rutting, cracks, potholes, and shoving. Rainfall penetrates into the crack and repeated freeze-thaw action weakens the durability of the pavement, accelerating pavement failure. In addition, the use of deicing agents to restrain road freezing during the winter and the resulting penetration of deicing material into the pavement is the cause of the concrete slab degradation that reduces the durability of concrete slabs. Therefore, various bridge waterproofing methods are applied when maintaining highway bridge pavement. Among the various bridge waterproofing materials applied in Korea, the two-component waterproofing method using epoxy resin is simple to be constructed and has excellent waterproofing performance and durability, and is expected to be widely applied in the future. - COLLAPSE
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Application of epoxy waterproofing containing bitumen for maintaining asphalt pavement on bridge
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Technical Notes
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Investigation of field application of thin sand mastic mixtures
불투수 차단층(샌드 매스틱) 혼합물의 현장 적용성 평가
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Munjin Cho, Hyunkook Shin
조문진, 신현국
- In Korea, concrete pavements account for 66% of all pavements and Jointed Concrete Pavement (JCP) is the main one. Spalling of joints, …
- In Korea, concrete pavements account for 66% of all pavements and Jointed Concrete Pavement (JCP) is the main one. Spalling of joints, which is a representative damage of JCP pavement, is threatening ride comfort, vehicle damage, and driver safety. There is an increasing interest in maintenance methods due to aging of concrete pavement. As a repair method for aged concrete pavement, the asphalt overlay method, which is advantageous in smoothness, noise, and construction period, is most often applied. However, pavement damages such as reflection cracking, shoving and pothole occur due to lack of adhesion between the existing concrete pavement and the new asphalt pavement. There is a need for a new method for preventing such pavement damage and extending the life of the pavement. In this investigation, an impermeable layer was applied on top of the existing JCP to reduce reflection cracking propagating from the bottom, increase adhesion with the existing pavement, and prevent penetration of rainwater and chlorides from the top. Thus, the durability of the pavement was secured and the lifetime of the pavement was extended at the same time. The impermeable layer is a thin sand mastic mixture(TSM) using a binder of PG88-34 with improved performance at low and high temperatures. In this study, the reflection cracking resistance, rutting resistance, and low-temperature bending strain of the TSM were evaluated through lab experiments, and field applicability was confirmed through test beds. - COLLAPSE
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Investigation of field application of thin sand mastic mixtures
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Technical Notes
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An analysis on the characteristic of sphalt drain asphalt binder
Sphalt 배수성 아스팔트 바인더 특성 분석
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Young Doo Jang, Jae Sik LEE, Dong Kyun Kim
장영두, 이재식, 김동균
- Drain asphalt pavement has many advantages such as drain function and noise function, but it is not widely used in Korea due …
- Drain asphalt pavement has many advantages such as drain function and noise function, but it is not widely used in Korea due to loss of drain function during use and poor durability such as desorption of aggregates. However, if a binder suitable for the characteristics of drain asphalt is developed and applied, it is expected to be used continuously in the henceforward. Therefore, in this technology, the characteristics of the high-viscosity Sphalt drain binder developed to solve the problem are described. Spalt drain binder is a binder developed to produce a homogeneous mixture because it has excellent storage stability and reduces phase separation during transportation and storage. - COLLAPSE
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An analysis on the characteristic of sphalt drain asphalt binder
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Scientific Paper
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Comparative study on long-term performance of foamed warm-mix recycled asphalt pavement using accelerated pavement testing
포장가속시험을 이용한 기포 중온 재활용 아스팔트 포장의 장기 공용성능 비교 연구
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Hong Jun Kwon, Won Jung Kim, Il Hwan Kang, Young Chan Suh, Yong Joo Kim
권홍준, 김원중, 강일환, 서영찬, 김용주
- In this study, the performance of foamed warm-mix recycled asphalt pavement were compared through the accelerated pavement testing (APT) and Marshall testing. …
- In this study, the performance of foamed warm-mix recycled asphalt pavement were compared through the accelerated pavement testing (APT) and Marshall testing. Three test pavement section to compare the long-term performance of foamed warm-mix recycled asphalt pavement (12.5 m length and 2.1 m width) were constructed for the APT. The results of APT showed the experimental group is equivalent or superior to the comparison group. Finally, recycled foamed asphalt pavement and semi-warm mix asphalt pavement presented equivalent long-term performace than Hot recycled asphalt. - COLLAPSE
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Comparative study on long-term performance of foamed warm-mix recycled asphalt pavement using accelerated pavement testing
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Scientific Paper
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A study on the appropriate replacement thickness of improvement methods to improve the quality of unpaved roads composed of mainly laterite in Lao PDR
라테라이트로 구성된 라오스 비포장도로의 품질 향상을 위한 개선공법의 적정치환두께 연구
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Il Hwan Kang, Yong Joo Kim, Hong Jun Kwon
강일환, 김용주, 권홍준
- The main roads in Lao PDR are unpaved and made of laterite, which has the disadvantage of reducing bearing capacity during rainy …
- The main roads in Lao PDR are unpaved and made of laterite, which has the disadvantage of reducing bearing capacity during rainy season or squalls and causing soil and sand to flow out. In this study, the appropriate replacement thickness of three types of improvement methods (CTB, ATB, and Lean Con'c) was calculated through computer analysis to improve the quality of unpaved roads in Laos, which are mainly composed of laterite. As a result of engineering classification by sampling the soil of the unpaved road, A-2-7 (High-plasticity silts) according to the AASHTO classification and SP, CL, and ML according to the USCS classification were obtained. Based on engineering classification, the condition of unpaved roads was divided into 5 types (SP, SM, very stiff clay (dry season), medium clay, and very soft clay), and computerized analysis was performed in FLAC 3D using the HL-93 truck tandem model. was carried out. As a result of computer analysis, it was confirmed that the maximum deflection decreases according to the replacement thickness of the improved method. In the case of ATB, horizontal and vertical strains (εt,εz) were calculated to be the largest in all conditions. In the case of Lean Con’c, the horizontal strain and vertical strain were calculated to be the smallest in all conditions, and the amount of change according to replacement thickness was the smallest. As a result of calculating the appropriate replacement thickness in the upper layer of unpaved roads in all conditions, it is 10 to 20 cm for CTB, more than 20 cm for ATB, and 5 to 10 cm for Lean Con’c. - COLLAPSE
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A study on the appropriate replacement thickness of improvement methods to improve the quality of unpaved roads composed of mainly laterite in Lao PDR
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Scientific Paper
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Research on improving mathematical modeling to verify low-temperature performance of high-viscosity asphalt binder
고점도 아스팔트 바인더의 저온성능 검증을 위한 수학적 모델링 개선연구
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Dong Min Cho, Tae Soon Park, Ki Hoon Moon
조동민, 박태순, 문기훈
- In verifying and evaluating the low-temperature performance of high-viscosity asphalt binders, this study sought to present accurate standards to overcome the limitations …
- In verifying and evaluating the low-temperature performance of high-viscosity asphalt binders, this study sought to present accurate standards to overcome the limitations of high-viscosity asphalt binders by improving the shortcomings of the previously developed mathematical modeling power in the process of reaching the All the activities were performed by advanced mathematical modeling approach and corresponding analyses. As an experimental effort, flexural beam test was performed under various temperature (-15°C, -20°C, -25°C) The analysis of test was conducted by two type of data: displacement vs. load, time vs. load, the flexural energy and the flexural stiffness. As a result of the test, various fracture phenomena occur due to the nature of the low-temperature bending test. Many difficulties are likely to arise in predicting and analyzing the low-temperature flexural beam test characteristics of high-viscosity asphalt binder using only test values. Therefore, it is believed that there is a need to accurately identify the engineering characteristics of various high-viscosity asphalt binders through mathematical modeling. To improve mathematical modeling, time-load prediction equations in the form of log-exponential function and natural log-exponential function were developed and presented based on the low-temperature bending test results. - COLLAPSE
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Research on improving mathematical modeling to verify low-temperature performance of high-viscosity asphalt binder
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Scientific Paper
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Epoxy thin layer pavement method for preventive maintenance of bridge surface pavement
교면포장의 예방적 유지관리를 위한 에폭시 박층포장 공법
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Dong Min Cho, Jae Soon Choi, Hyeon kuk Shin, Kyong Il Ko
조동민, 최재순, 신현국, 고경일
- For bridges with pavements or exposed concrete, maintenance repair is required 10 to 15 years after construction. Therefore, preventive maintenance is required …
- For bridges with pavements or exposed concrete, maintenance repair is required 10 to 15 years after construction. Therefore, preventive maintenance is required to prevent premature deterioration and further damage to the pavement. The objective of this study is to measure the performance of epoxy thin layer pavement as a method of bridge surface maintenance. By applying 3-6 mm of epoxy over the existing pavement without removing the existing concrete pavement, the deterioration of the concrete pavement can be prevented and the durability of the bridge deck and bridge can be improved. The use of epoxy thin layer pavement is an economical and affordable way to maintain concrete bridges. - COLLAPSE
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Epoxy thin layer pavement method for preventive maintenance of bridge surface pavement
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Scientific Paper
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Modelling of ultimate zone on asphalt binder applied sigmoid function approach
시그모이드함수 기반으로 아스팔트 바인더의 극한영역 모델링 연구
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Sang Gab Cho, Tae Soon Park, Ki Hoon Moon
조상갑, 박태순, 문기훈
- This study was performed to predict the viscoelastic behavior on Asphalt binder by means of mathematic modeling approach. As testing material, PG …
- This study was performed to predict the viscoelastic behavior on Asphalt binder by means of mathematic modeling approach. As testing material, PG 64-22 asphalt binder was prepared. The Dynamic Shear Rheometer (DSR) test was performed as mechanical experimental activities of asphalt binder. As result, complex shear modulus of given asphalt binder at various temperature and frequency conditions was computed then generated. To predict and analyze the global mechanical performance of tested asphalt binder from DSR test results, a master curve construction and generation approach was considered. In the previous studies, two mathematical models: Sigmoidal and Richards models, were considered to predict the global complex shear modulus pattern of given asphalt binders. However, not many studies considered on developing more advanced mathematical models on global complex shear modulus behavior than the previous ones in the past decades. In this paper, three different mathematical modeling approaches for complex shear modulus master curve construction were introduced. It was found that the newly developed three mathematical models can successfully explain and predict global complex shear modulus of asphalt binder compared to the previous ones. This means there can be more options for DSR test results prediction. More experimental works and corresponding analyses are needed to further strengthen the findings in this paper as a future research. - COLLAPSE
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Modelling of ultimate zone on asphalt binder applied sigmoid function approach
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Scientific Paper
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A study of asphalt mixture self-healing properties by using microwave irradiation in laboratory
마이크로웨이브를 이용한 아스팔트 혼합물 자가회복 특성 실내 연구
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Sungun Kim, Kwangwoo Kim, Unkyu Jeong
김성운, 김광우, 정운규
- Asphalt has the characteristic of changing phases into solid, viscoelastic, and liquid depending on temperature. Asphalt becomes brittle at low temperatures in …
- Asphalt has the characteristic of changing phases into solid, viscoelastic, and liquid depending on temperature. Asphalt becomes brittle at low temperatures in the winter, causing cracks, and becomes fluid and deforms at high temperatures in the summer. Asphalt has fluidity as temperature rises and has the property of moving to cracks inside the pavement and sealing. Research on restoring road performance using this characteristic (asphalt self-healing) has been actively conducted. In this study, various tests were conducted to confirm the self-healing properties of asphalt using microwave irradiation in the laboratory. The flexural strength and indirect tensile strength before and after microwave irradiation were compared to analyze the different strength recovery ratio due to microwave irradiation. As a result of the study, it was confirmed that microwave irradiation is effective in recovering the strength of asphalt pavement, and that the strength recovery ratio of asphalt mixtures using SMA mixtures with high asphalt content and materials with heat conduction characteristics was high. - COLLAPSE
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A study of asphalt mixture self-healing properties by using microwave irradiation in laboratory
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Scientific Paper
- Low temperature fracture performance evaluation of asphalt pavement by means of 3D pavement profiler approach and Semi Circular Bending (SCB) low temperature fracture test
- Ki Hoon Moon, Dueck Su Sohn
- Evaluation of low temperature performance of asphalt mixture is significant not only for mitigating transverse thermal cracking but also for preventing potential …
- Evaluation of low temperature performance of asphalt mixture is significant not only for mitigating transverse thermal cracking but also for preventing potential traffic accidents. In addition, the pavement agency engineers should inform the proper pavement section where urgent management is needed. Since early 2000, Korea Expressway Corporation Research Division (KECRD) developed an 3D Pavement condition Monitoring profiler vehicle (3DPM) to survey expressway pavement surface condition precisely. The management of whole expressway network became more extensive, precise, effective and efficient than before due to application of 3DPM and HPMS. One thing recommended is: performing extensive mechanical test and corresponding data analysis work procedure to further strengthen the feasibility of current 3DPM approach and HPMS. In this paper two activities were considered: first, the pavement section where the urgent care is recommended is selected and analyzed by means of 3DPM approach. Then asphalt mixture cores were acquired on that specified section then low temperature fracture test: Semi Circular Bending (SCB) test, was performed. The mechanical parameters, energy release rate and fracture toughness were computed then compared. It can be mentioned that the current 3DPM approach in KEC can successfully evaluate and analyze the selected pavement condition. However, more extensive experimental works are needed to further strengthen the current pavement analyzing approaches. - COLLAPSE
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Scientific Paper
- 3D pavement surface monitoring vehicle feasibility evaluation by means of low temperature Bending Beam Rheometer (BBR) mixture test
- Ki Hoon Moon, Dueck Su Sohn
- In South Korea, the concept of Highway Pavement Management System (HPMS) was developed since early 2000. During this periods, numbers of professional …
- In South Korea, the concept of Highway Pavement Management System (HPMS) was developed since early 2000. During this periods, numbers of professional pavement condition monitoring equipment were developed and applied in the actual field. One of the remarkable achievements is 3D Pavement condition Monitoring profiler vehicle (3DPM) designed and developed in Korea Expressway Corporation Research Division (KECRD). Thanks to this equipment, the surface condition of current pavement can successfully be monitored and proper following management strategy can be established. However, the inner condition of pavement layer cannot be monitored fully due to limitation of 3DPM equipment. In this paper, extensive Bending Beam Rheometer (BBR) mixture creep test was performed to verify the effectiveness of current 3DPM equipment. Finally, it was found that the current 3DPM equipment has reasonable feasibility on surveying expressway pavement condition. - COLLAPSE
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Scientific Paper
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Development of parking lot design manual for cargo vehicle parking lot design in port
항만 내 화물차 주차장 설계를 위한 주차장 설계 매뉴얼 개발
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Jun Seoung Choi, Sang Jin Kim, Jinseong Seo, Jaejin Lee
최준성, 김상진, 서진성, 이재진
- In recent years, as the cargo volume has increased, the problem of insufficient parking space for lorries in the port has been …
- In recent years, as the cargo volume has increased, the problem of insufficient parking space for lorries in the port has been raised. This is a negative cause that can lead not only to a decrease in cargo liquidity at the port, but also to civil complaints in neighboring areas. In this study, A design flowchart was created for the design of a cargo vehicle parking lot within the port, and based on this, an example was created to create a manual for the design of a truck parking lot. - COLLAPSE
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Development of parking lot design manual for cargo vehicle parking lot design in port
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Scientific Paper
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Analysis procedure for porous pavement using advanced temperature - compensated deflection formula
국내적용 온도보정처짐개발식을 통한 배수성포장 분석절차 제안
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Jun Seong Choi, Seung Hoon Oh, Jangrak Kim, Jongseob Lee
최준성, 오승훈, 김장락, 이종섭
- In this study, we reviewed the applicability of the existing Temperature-compensated deflection equation using a Representative temperature estimation method using existing research …
- In this study, we reviewed the applicability of the existing Temperature-compensated deflection equation using a Representative temperature estimation method using existing research results, and improved and verified it to a domestically new temperature-compensated deflection equation that takes into account various asphalt thicknesses. In addition, based on the FWD test-data of porous asphalt pavement, we propose a analyzing process for the performance degradation of porous asphalt pavement, including a process of performing standard load and temperature correction on FWD data, and a conversion process of FWD Back-calculation elastic modulus to field dynamic elastic modulus. After proposing the process, a Excel program was developed for the evaluating the degradation of performance in the porous asphalt pavement using the concept of dynamic elastic modulus. - COLLAPSE
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Analysis procedure for porous pavement using advanced temperature - compensated deflection formula
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Scientific Paper
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A study on Low-Temperature flexural characteristics of high viscosity asphalt binder useing statistical verification techniques
통계분석 기법을 적용한 고점도 아스팔트 바인더의 저온 휨 특성 연구
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Geon Ho Park, Sung Hyeon Park, Tae Soon Park, Ki Hoon Moon
박건호, 박성현, 박태순, 문기훈
- Porus asphalt pavement, with a 20% porosity compared to conventional asphalt, allows for the generation of high-pressure water infiltration during rainfall. To …
- Porus asphalt pavement, with a 20% porosity compared to conventional asphalt, allows for the generation of high-pressure water infiltration during rainfall. To prevent premature oxidation of the asphalt binder due to exposure to UV rays and wind, high-modulus asphalt binders are utilized. In addition to the standard performance grade test, a flexural beam test is conducted for freeze-thaw vulnerability assessment. Currently, flexural beam test is conducted at -20°C regardless of the performance grade. To evaluate the suitability of this test temperature, mathematical modeling and statistical analysis were performed, confirming the appropriateness of the current flexural beam test temperature of -20°C. - COLLAPSE
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A study on Low-Temperature flexural characteristics of high viscosity asphalt binder useing statistical verification techniques
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Scientific Paper
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Evaluation of asphalt pavement condition using hyper-spectral images
초분광 영상을 이용한 아스팔트 포장 공용성 평가
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Kyu-dong Jeong, Jinhwan Jang, Sung Pil Shin, Jung-il Shin
정규동, 장진환, 신성필, 신정일
- The spectral characteristics were evaluated using cored samples collected from cracks on the asphalt pavement. Among the spectral index models, VISI2 and …
- The spectral characteristics were evaluated using cored samples collected from cracks on the asphalt pavement. Among the spectral index models, VISI2 and VISR2 had high significance. When the asphalt pavement crack was large, there was a significance of 0.9 or more compared to the sample without crack. Asphalt pavement was investigated using road survey vehicles and drone hyper-spectral cameras and the correlation was evaluated. As a result, rutting showed a relatively high correlation in the WBI model at 0.704, but the correlation was low in relation to IRI and cracks. - COLLAPSE
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Evaluation of asphalt pavement condition using hyper-spectral images
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Scientific Paper
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Development of the construction method of surface recycling for warm in-place asphalt recycling
현장 중온 리서페이스 아스팔트 포장 시공 방법 개발
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Kyu-dong Jeong, Je-Won Kim, Soo-Ahn Kwon
정규동, 김제원, 권수안
- It was 100% recycled at the site of the old asphalt pavement by the Warm In-Place asphalt surface recycling method, and was …
- It was 100% recycled at the site of the old asphalt pavement by the Warm In-Place asphalt surface recycling method, and was analyzed and evaluated through test construction. Pre-heater and recyclers were developed for the construction. As a result of application, it was evaluated that it showed the asphalt rejuvenating effect by applying old asphalt pavement. If the viscosity of the recycled asphalt mixture is low, the rutting resistance is low, but the crack resistance can be higher than that of new asphalt pavement. If the asphalt content and air voids of the existing asphalt pavement are suitable, the total asphalt content may increase when the rejuvenator is mixed, thereby lowering the air voides after construction. Accordingly, countermeasures such as mixing new aggregates are needed. - COLLAPSE
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Development of the construction method of surface recycling for warm in-place asphalt recycling
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Scientific Paper
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Evaluation of recovery level of recycled asphalt mixture by RAP contents using absolute viscosity, GPC and PG pass/fail temperature
재활용비율에 따른 순환아스팔트 혼합물의 절대점도, GPC 및 PG 판정온도를 이용한 회생수준평가
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Wonbae Kim, Woohyun Kim, Yeongsam Kim, Kwang W. Kim
김원배, 김우현, 김영삼, 김광우
- The reclaimed asphalt pavement (RAP) should be properly rejuvenated when it is used in a recycled asphalt mixture. In this study, a …
- The reclaimed asphalt pavement (RAP) should be properly rejuvenated when it is used in a recycled asphalt mixture. In this study, a RAP was used for recycled mix with recycle ratios of 30, 40 and 50 wt. % without rejuvenator. A 19 mm virgin aggregate for binder-course mixes, and a PG58-22 asphalt were used for recycled mixes, and a PG64-22 was used for a normal (control) mix. The asphalt binders were recovered from the RAP, normal mix and recycled mixes by Abson method. Absolute viscosity at 60°C, kinematic viscosity at 135°C, PG grading, G*/sin δ and pass/fail (P/F) temperatures were measured from the recovered binders by a dynamic shear rheometer (DSR). Gel-permeation chromatography (GPC) was used to measure large molecular size (LMS) of binder from the dissolution of mixture particle without binder recovery for estimation of physical properties of asphalt. The recovered binder properties including absolute viscosity (AV), G*/sin δ and P/F temperature were found to be increased by the recycling ratio increases. The regression analyses between AV and LMS, and P/F temp. and LMS showed high correlations with R2 > 0.99, respectively. Therefore, it was possible to estimate AV and P/F temp. reliably by LMS. According to Korean guide-line, recycled mixes failed to pass the limit of AV ≤ 5,000 p except for 30% recycled mix. However, all recycled mixes should be prepared using a rejuvenator when evaluated by P/F temp. method of the Asphalt Institute method, because the P/F temp. of recovered binders were 6°C on average higher than expected values. - COLLAPSE
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Evaluation of recovery level of recycled asphalt mixture by RAP contents using absolute viscosity, GPC and PG pass/fail temperature
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Scientific Paper
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A case study on the impact seismic assessment of geotechnical disaster for the selection of facility location in reclamation lands
매립부지의 시설위치 선정을 위한 지진시 지반재해 영향평가 사례연구
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Jae-Soon Choi, Woo-Hyun Baek, Jang-Tae Kim
최재순, 백우현, 김장태
- Since 1980s, due to the rise in domestic real estate prices, it has become difficult to secure land for the construction of …
- Since 1980s, due to the rise in domestic real estate prices, it has become difficult to secure land for the construction of social overhead capital. Instead, the necessary land has been secured through reclamation of domestic coastal areas, and such attempts have continued in recent years. Meanwhile, due to the 1995 southern Hyogoken-Nambu earthquake that struck Kobe, most of Kobe Port, built on reclaimed land, lost its port logistics distribution function due to soil liquefaction. The Korean peninsula, previously considered a safe zone against earthquake, experienced soil liquefaction in 2017. In this study, a method for evaluating the impact of ground disasters during earthquakes was presented in selecting the locations of roads and major facilities when making construction plans on reclaimed lands, and the assessment for seismic geotechnical disaster was performed in actual reclaimed lands. - COLLAPSE
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A case study on the impact seismic assessment of geotechnical disaster for the selection of facility location in reclamation lands
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Scientific Paper
- Laboratory investigation on storage stability based on physical properties and microstructural image depending on rubber particle size for CRM asphalt binder
- Jihyeon Yun, Sushmit Sharma Bhattarai, Hyemin Park, Hyunhwan Kim, Il-Ho Na
- In this research, the viscoelastic properties and microstructure of asphalt binders modified with two Crumb rubber modifiers (CRM), #50 and #30, using …
- In this research, the viscoelastic properties and microstructure of asphalt binders modified with two Crumb rubber modifiers (CRM), #50 and #30, using mechanical tests and Atomic force microscopy (AFM) were evaluated. Each modified asphalt binder was prepared by mixing 5% and 15% CRM. The Separation index (SI) of each binder was calculated using rheological measurements (G*/sin δ and % recovery). Additionally, AFM was employed to capture topographical images of the CRM asphalt binders, aiding in a comprehensive assessment for SI. The key findings include (1) enhanced rheological properties in the lower sections of CRM asphalt binders, attributed to density differences between the CRM and the base asphalt; (2) lower SI in #50 CRM binders, correlating with their more uniform particle distribution; and (3) microstructural distinctions observed via AFM, with #50 CRM binders showing uniformity across top and bottom layers, unlike #30 CRM binders. These insights demonstrate that microstructural images can be an effective tool for assessing the storage stability of CRM asphalt binders, thereby contributing significantly to a more in-depth understanding of their stability. - COLLAPSE
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Scientific Paper
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Effect of warm-mix additives on the fracture toughness and aging of asphalt binders and mixtures
중온 첨가제가 아스팔트 혼합물의 파괴인성 및 노화량에 미치는 상관성에 관한 연구
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Soon yong An, Tae Soon Park, Kwang W. Kim
안순용, 박태순, 김광우
- The carbon neutrality movement, which is emerging globally, has made carbon dioxide reduction a necessary topic, not an option, to reduce greenhouse …
- The carbon neutrality movement, which is emerging globally, has made carbon dioxide reduction a necessary topic, not an option, to reduce greenhouse gases due to climate change. In order to realize this theme, we actively protect the environment by dramatically reducing carbon dioxide emitted from heated asphalt and saving fuel. In order to adapt to environmental issues such as fine dust and climate change, the aggregate heating temperature is increased from 165°C to 135°C. The WMA method, a groundbreaking packaging method that lowers the temperature by 30°C, was developed. However, asphalt mixture is a ductile or viscoelastic material at room temperature, but becomes a brittle material similar to cement concrete at sub-zero temperatures. The low-temperature KIC value of the asphalt mixture presented in previous studies was confirmed to be in the range of 0.6 to 2.2 In addition, it is important to identify mechanical properties related to fracture crack resistance, referred to as the critical stress intensity coefficient or KIC, of asphalt mixtures at low temperatures, and extensive attempts are being made to improve low-temperature properties. Therefore, in this study, based on the research results of several researchers on WMA, the moisture present inside the aggregate of WMA and HMA and the aging of the asphalt binder may be more susceptible to low-temperature brittle fracture at a slightly higher temperature than general WMA. This study was conducted to investigate the effect and influence of the fracture toughness of produced polymer-modified WMA and polymer-modified HMA and their correlation with aging amount. - COLLAPSE
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Effect of warm-mix additives on the fracture toughness and aging of asphalt binders and mixtures
Journal Informaiton
Journal of the Korean Asphalt Institute
Journal of the Korean Asphalt Institute
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Tel: +82-02-948-1268 / E-mail: asphaltinstitute@naver.com Copyright© KOREAN ASPHALT INSTITUTE. Powered by APUB