水基聚合物SRX稳定碎石路用性能

发布时间：2018-02-22 15:05

本文关键词： SRX稳定碎石水稳定性抗冻性高温稳定性　出处：《建筑材料学报》2017年04期 　论文类型：期刊论文

【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0.75%时,试件干化抗压强度逐渐增大,最大为7.00MPa;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93.8%和92.4%;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43.5g;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.
[Abstract]:The vertical vibration method was used to form water-based polymer SRX stabilized macadam specimens, and the increasing rule of strength was studied. The results show that when the content of SRX (mass fraction) increases from 0% to 0.75, the dry compressive strength of the specimens increases gradually. The maximum value is 7.00 MPA. With increasing the content of SRX, the dry compressive strength of the specimen decreases. Through saturated water test, soak-drying cycle test and scour resistance test, The water stability of SRX stabilized macadam was studied. The results showed that the relative moisture content of the dried specimens increased sharply in the early stage of soaking, and when the specimens were immersed in water for 36 h, the water content of the specimens basically reached the state of saturation. The relative strength is about 76.0.The residual strength of the specimen decreases to 93.8% and 92.4 after 30 and 60 cycles of soaking and drying. With the extension of the scouring time, the dynamic water pressure and the erosion resistance of the specimen increase, and the erosion resistance of the specimen decreases with the extension of the scouring time. The maximum mass loss is 43.5 g. SRX stabilized crushed stone has good water stability under laboratory conditions. Through five freeze-thaw cycle tests and rutting performance tests, The freezing resistance and high temperature stability of SRX stabilized macadam are studied. The results show that the freezing resistance coefficient of the specimen is about 10, the frost resistance is poor, and the dynamic stability of the specimen is 5 ~ 6 times that of the ATB-30 base. It shows good rutting resistance and is suitable for application in high temperature area.
【作者单位】：长安大学公路学院;河北省交通规划设计院河北省道路结构与材料工程技术研究中心;金华市公路管理局;
【基金】：浙江交通科技项目(2013H18)
【分类号】：U414

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