| 摘要: |
| 采用垂直振动方法成型水基聚合物SRX稳定碎石试件，研究了其强度增长规律.结果表明：当SRX掺量（质量分数）由0%增大到075%时，试件干化抗压强度逐渐增大，最大为700MPa；继续提高SRX掺量，试件干化抗压强度出现下降的趋势.通过饱水试验、浸烘循环试验以及抗冲刷性能试验，研究了SRX稳定碎石的水稳定性.结果表明：干化后的试件在浸水初期，其相对含水率急剧增大，当浸水36h时，试件基本达到饱水状态，其相对强度约为76.0%；试件浸烘循环30次和60次时，其残留强度降低为938%和924%；随着冲刷时间的延长，试件所承受的动水压力增加，抗冲刷性能降低，最大质量损失为435g；在实验室条件下SRX稳定碎石具有较好的水稳定性.通过5次冻融循环试验和车辙性能试验，研究了SRX稳定碎石的抗冻性能和高温稳定性.结果表明：试件的抗冻系数约为10%，抗冻性能较差，不适宜在季冻地区应用；试件动稳定度达到ATB 30基层的5~6倍，展现出良好的抗车辙性能，适宜在高温地区推广应用. |
| 关键词: SRX稳定碎石 水稳定性 抗冻性 高温稳定性 |
| DOI：103969/j.issn.1007 9629201704018 |
| 分类号: |
| 基金项目:浙江交通科技项目（2013H18） |
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| Road Performance of Water Based Polymer SRX Stabilized Crushed Stone |
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ZHAO Wei,JIANG Yingjun,CHEN Zhejiang,LI Shouwei
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Highway School, Changan University, Xian 710064, China
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| Abstract: |
| Rules of compressive strength enhancement of water based polymer SRX stabilized crushed stone were studied.The SRX stabilized crushed stone specimens were prepared by vertical vibrating test method. The results show that when SRX content(by mass) is increasing from 0% to 075%, the drying compressive strength of specimens gradually increases up to 700MPa. And then the drying compressive strength tends to reduce with increasing SRX content. Water stability of SRX stabilized crushed stone was studied by immersion saturated test，immersion drying cycle test and anti erosion test. The results show that in the early immersion, the relative moisture ratio increases rapidly, and reaches immersion saturation state with the relative compressive strength about 76.0% at 36h; the residual compressive strength is 938% and 924% when the specimens are tested 30 times and 60 times by immersion drying cycle test; the specimens undertake increasing hydrodynamic pressure with prolonged erosion and the anti erosion performance of specimens is lower with maximum mass loss of 435g. Generally, SRX stabilized crushed stone performs better water stability performance in laboratory. Through 5 times freeze thaw cycle test and rutting test, the anti freeze performance and high temperature stability of SRX stabilized crushed stone were observed. The results show that its anti freeze coefficient is about 10%, thus its anti freeze performance is poor and not suitable for seasonal freezing region; Its dynamic stability(DS) is up to 56 times compared with ATB 30, its anti rutting performance is better, which is suitable for high temperature areas. |
| Key words: SRX stabilized crushed stone water stability anti freeze performance high temperature stability |
