| 沥青混合料低温抗裂性评价方法研究 |
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| 引用本文： | 刘涛,郝培文.沥青混合料低温抗裂性评价方法研究[J].同济大学学报(自然科学版),2002,30(12):1468-1471. |
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| 作者姓名： | 刘涛 郝培文 |
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| 作者单位： | 1. 同济大学,道路与交通工程教育部重点实验室,上海,200092
2. 长安大学,公路学院,陕西,西安,710064 |
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| 基金项目： | 新疆维吾尔自治区科技攻关资助项目 (G9532 80 5) |
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| 摘 要： | 一般评价沥青混合料低温抗开裂性能可从两方面进行,一方面看其在低温下的变形能力;另一方面看其在低温断裂时所能承受的断裂拉力的大小,但以往多以其变形能力这一单一指标来衡量沥青混合料的抗开裂能力是不全面的,为此从如何综合反应沥青混合料断裂时的应力,应变大小的角度出发,提出了评价沥青混合料低温抗开裂性能的压缩应变能指标及计算方法,并对两种改性沥青混合料进行了冻断试验和压缩应变性能试验,比较了它们的试验结果。
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| 关 键 词： | 低温抗开裂性能 变形能力 压缩应变能 |
| 文章编号： | 0253-374X(2002)12-1468-04 |
| 修稿时间： | 2002年4月30日 |
Comparison Study of Evaluation Method for Low Temperature Anti-cracking Performance of Hot Mix Asphalt |
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| LIU Tao ,HAO Pei-wen.Comparison Study of Evaluation Method for Low Temperature Anti-cracking Performance of Hot Mix Asphalt[J].Journal of Tongji University(Natural Science),2002,30(12):1468-1471. |
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| Authors: | LIU Tao HAO Pei-wen |
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| Institution: | LIU Tao 1,HAO Pei-wen 2 |
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| Abstract: | Generally the evaluation of low temperature anti-cracking performance of hot mix asphalt(HMA) should be carried out in two aspects,that is,in low temperature deformability and at the magnitude bearing low temperature breaking tensile force.Formerly,however,most of the evaluation of low temperature anti-cracking performance with single index-deformability was not comprehensive.Concerning how to reflect synthetically the magnitude of the stress and strain at the crack point,this paper puts forward an index-compression strain energy and its calculation method that are used to evaluate low temperature anti-cracking performance.And the "Freeze-breaking" test and compression strain energy test of two kinds of hot modified asphalt mix were completed.Moreover,the results of the two tests were compared with each other. |
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| Keywords: | low temperature anti-cracking performance deformability compression strain energy |
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