温拌废塑/SBS复合改性沥青流变性能的研究
Study on Rheological Properties of Warm Mix Waste Plastic/SBS Composite Modified Asphalt
徐传浩 1石振武 1程有坤 2尹智艺1
作者信息
- 1. 东北林业大学土木与交通学院,黑龙江 哈尔滨 150040
- 2. 黑龙江科技大学建筑工程学院,黑龙江 哈尔滨 150022
- 折叠
摘要
为研究温拌剂对废塑/苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS)复合改性沥青流变性能的影响,在沥青中加入不同质量分数(1.0%、1.2%、1.4%)的BMH型温拌剂,借助傅里叶红外光谱测试(FTIR)、动态剪切流变试验(DSR)、多应力蠕变恢复试验(MSCR)以及低温弯曲梁流变试验(BBR)分析BMH对废塑/SBS复合改性沥青流变性能的影响.结果表明:BMH显著提高废塑/SBS复合改性沥青的高温抗变形能力,降低其应力敏感性.当温拌剂质量分数为1.2%时,改善效果最优,1.4%掺入质量分数的提升效果不升反降;BMH可提高废塑/SBS复合改性沥青的中温抗疲劳性能,以1.2%的掺入质量分数提升效果最为明显,其他掺入质量分数的提升效果与之相近;BMH可以改善废塑/SBS复合改性沥青低温流变性能,且当掺入质量分数为1.4%时沥青应力松弛能力最好,抗低温开裂性能最优.
Abstract
In order to study the effect of warm mixture on the rheological properties of waste plastic/styrene-butadiene-styrene triblock copolymer(SBS)composite modified asphalt,BMH warm mixture with different mass fraction(1.0%,1.2%and 1.4%)was added into asphalt.The effects of BMH on the rheological properties of waste plastic/SBS composite modified asphalt were analyzed by Fourier transform infrared spectroscopy(FTIR),dynamic shear rheology(DSR),multi-stress creep recovery test(MSCR)and low temperature bending beam rheological test(BBR).The results show that BMH can significantly improve the high temperature deformation resistance and reduce the stress sensitivity of waste plastic/SBS composite modified asphalt,and when the warm mixture mass fraction is 1.2%,the improvement effect is the best,and the improvement effect of 1.4%mass fraction does not increase but decreases.BMH can improve the medium temperature fatigue resistance of waste plastic/SBS composite modified asphalt,the improvement effect of 1.2%content is the most obvious,and the improvement effect of other content is similar.BMH can improve the low-temperature rheological properties of waste plastic/SBS composite modified asphalt,the asphalt stress relaxation capacity is the best when the mass fraction is 1.4%,and the low-temperature cracking resistance is the best.
关键词
废塑/SBS改性沥青/温拌技术/流变性能/红外光谱/Burgers模型Key words
Waste plastic/SBS modified asphalt/Warm mix technology/Rheological properties/Infrared spectroscopy/Burgers model引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据