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2019 Vol.9, Issue 2 Preview Page

Scientific Paper

Strength evaluation of HMA and WMA sand asphalt mixtures

HMA와 WMA 샌드 아스팔트 혼합물 강도특성 연구

Changjeong Choi1
,
Yeongsam Kim2
,
Kwang Woo Kim3
,
Sungun Kim4*
최 창정1
,
김 영삼2
,
김 광우3
,
김 성운4*
1C.E.O., I-SU Co., Ltd.
2Ph. D. Student, Department of Regional Infrastructure Engineering, Kangwon National University
3Professor, Department of Regional Infrastructure Engineering, Kangwon National University
4Senior Research Engineer, Institute for Advanced Construction Materials, Kangwon National University
1주식회사 이수 사장
2강원대학교 지역건설공학과 박사과정
3강원대학교 지역건설공학과 교수
4강원대학교 석재복합건설신소재연구소 연구원
* Corresponding Author
31 December 2019. pp. 244-254
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Abstract

The Sand asphalt mixture (SAM) pavement was developed to provide safe walking condition by virtue of excellent properties such as surface smoothness and soft texture, because the SAM is made of fine aggregate without coarse particles with a higher asphalt content. SAM was also designed to show excellent flexibility under freeze conditions and relatively high deformation resistance. Therefore, it can be applied to the pavements of pedestrians, sideway, bicycle road and low volume road with relatively small vehicles in rural area. In this study, the SAM mix design was conducted by adding crumb rubber modifier (CRM) with 7.5% and 10% by binder weight. In addition, two types of SAM i.e., hot-mix sand asphalt mixture (H-SAM) and warm-mix sand asphalt mixture (W-SAM), were prepared and evaluated in this study. The deformation strength (SD), indirect tensile strength (ITS), were evaluated. The low temperature flexural strength (Sf) was measured by three point bending (3PB) test at –10°C. The results showed that the deformation strength and tensile strength of the W-SAM showed similar values to the H-SAM. The flexural strength test presented that Sf of H-SAM was 12% higher than that of W-SAM with W-SAM having similar failure strain.

Keywords
Sand asphalt mixture, Hot Mix Asphalt (HMA)
Warm Mix Asphalt (WMA)
Deformation strength
Indirect Tensile Strength (ITS)
Low temperature flexural strength
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Information
  • Publisher :KOREAN ASPHALT INSTITUTE
  • Publisher(Ko) :한국아스팔트학회
  • Journal Title :Journal of the Korean Asphalt Institute
  • Journal Title(Ko) :한국아스팔트학회지
  • Volume : 9
  • No :2
  • Pages :244-254
  • Received Date : 2019-12-17
  • Revised Date : 2019-12-26
  • Accepted Date : 2019-12-30
  • DOI :https://doi.org/10.22702/jkai.2019.9.2.016
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