Improving asphalt concrete mixtures resistance to rapid freeze-thaw effect using HIPS polymer

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Emerging Materials Research Pub Date : 2022-09-01 DOI:10.1680/jemmr.21.00129

Mousa I. Bani Baker, R. Abendeh

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引用次数: 2

Abstract

Two methods of High Impact Polystyrene polymer (HIPS) addition to the asphalt concrete mixtures (AC) were used to evaluate the effect of freeze-thaw (FT) cycles on the performance of unmodified and modified AC by HIPS; supplementary and additional HIPS polymer as asphalt aggregates. Various polymer contents were used to modify the AC in both methods namely 0% (control), 5%, 10%, 15%, and 20%. Marshall stability, flow, bulk density, Indirect Tensile Strength (ITS) tests were performed on control and modified samples. Non-destructive test was evaluated by Ultrasonic Pulse Velocity. In the first method, replacing mineral filler by HIPS polymer in AC by 10% lead to the increase of density by 1%, stability by 113%, retained stability by 52%, and ITS by 56% compared to control specimen, these results show a reduction in the damage caused by 8 weeks of FT cycles by 14% for modified AC compared to unmodified AC. However, modifying AC by the second method did not provide promising results, the velocity within the specimen has dropped by 20.9% at 10% HIPS additive before FT effect compared to control. The results of the first method revealed the feasibility of improving AC by HIPS polymer to resist effective FT cycles.

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利用HIPS聚合物提高沥青混凝土混合料抗快速冻融效果

采用高冲击聚苯乙烯聚合物(HIPS)加入沥青混凝土混合料(AC)的两种方法，研究了冻融循环对未改性和HIPS改性AC性能的影响;作为沥青集料的补充和附加HIPS聚合物。采用不同的聚合物含量分别在0%(对照)、5%、10%、15%和20%对AC进行改性。对对照样品和改性样品进行了马歇尔稳定性、流动、体积密度、间接拉伸强度(ITS)测试。采用超声脉冲速度法进行无损检测。在第一种方法中，用HIPS聚合物代替AC中10%的矿物填料，与对照试样相比，密度增加1%，稳定性提高113%，保留稳定性提高52%，ITS提高56%，这些结果表明，与未改性AC相比，改性AC在8周FT循环中造成的损伤减少了14%。然而，用第二种方法改性AC并没有提供令人满意的结果。在不加FT的情况下，添加10% HIPS后试样内的速度比对照降低了20.9%。第一种方法的结果揭示了用HIPS聚合物改善AC以抵抗有效FT循环的可行性。

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来源期刊

Emerging Materials Research MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

9.10%

发文量

期刊介绍： Materials Research is constantly evolving and correlations between process, structure, properties and performance which are application specific require expert understanding at the macro-, micro- and nano-scale. The ability to intelligently manipulate material properties and tailor them for desired applications is of constant interest and challenge within universities, national labs and industry.