Low temperature cracking performance of WMA with the use of the Superpave indirect tensile test

被引：73
作者：
Das, Prabir Kumar [1 ]
Tasdemir, Yuksel [2 ]
Birgisson, Bjorn [1 ]
机构：
[1] KTH Royal Inst Technol, Div Highway & Railway Engn, SE-10044 Stockholm, Sweden
[2] Bozok Univ, Engn & Architecture Fac, Yozgat, Turkey
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 30卷
关键词：
Low temperature cracking; Wax; Warm mix asphalt; Superpave IDT; HMA fracture mechanics; ASPHALT; WAX;
D O I：
10.1016/j.conbuildmat.2011.12.013
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Low temperature cracking of wax modified bitumen and asphalt mixtures were studied using the Dynamic Shear Rheometer (DSR), Bending Beam Rheometer (BBR), Superpave IDT and Thermal Stress Restrained Specimens Test (TSRST). Two types of commercial waxes (FT-paraffin and Asphaltan-B) were added to 70/100 penetration grade bitumen. Hot Mix Asphalt (HMA) fracture mechanics was used to determine fracture parameters. Master curves obtained from DSR and BBR test results showed stiffening effect due to wax additive at low temperature. The analysis of covariance was performed using a General Linear Model (GLM) on the Superpave IDT test results for Energy Ratio (ER) by using SPSS (Statistical Program for Social Sciences). Statistical analysis of Superpave IDT results showed a minor negative effect of wax modification at lower temperatures. Statistical analysis also showed that fracture parameters are highly temperature dependent and the two types of aggregate used did not play any significant role in low temperature cracking performance. Results obtained from TSRST tests indicate wax modification has a minor negative effect in low temperature cracking performance of asphalt mixtures. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：643 / 649
页数：7
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