超微表处配比设计及功能特性

Proportioning design and functional properties of super micro-surfacing

在两类离子乳化沥青中加入6种添加剂和8种填料,确定两者最佳质量分数,对超微表处材料进行性能优化设计;为进一步研究超微表处材料的路用性能,对其抗滑性、融雪性、降噪性和耐磨耗性进行试验,利用软化系数评价其耐水性.结果表明:当悬浮剂、增稠剂、增韧剂、成膜剂、润湿剂及SBS胶乳掺量分别为5.0%, 2.0%, 20.0%, 15.0%, 0.6%和15.0%时,乳液性能最优;加铺超微表处材料的路面构造深度减小,摩擦系数明显增大,且在0℃饱水100.0 h后融雪盐持续均匀析出;加铺超微表处混合料路面的噪音值较原路面减小了2.4～2.8 dB;湿轮磨耗值和加载磨耗值明显减小,显著提高了路面的抗滑性、融雪性、降噪性和耐磨耗性;对比原路面,加铺超微表处路面饱水100.0 h的软化系数可达86.3%,具有优异的耐水性.

For the purpose of designing high-performance super micro-surfacing, six kinds of additives and eight kinds of fillers were added to the two kinds of ion emulsified asphalt, and the optimum content was determined. To further investigate the road performance of super micro-surfacing materials, the tests were carried out to analyze the properties of skid resistance, snow melting, noise reduction and wear resistance, and the water resistance property was evaluated by softening coefficient . The results show that the emulsion performance is optimal when the contents of suspension agent, thickener, toughening agent, film forming agent, wetting agent and SBS latex are 5.0%, 2.0%, 20.0%, 15.0%, 0.6% and 15.0%, respectively. With overlaying the super micro-surfacing material, the pavement structure depth is reduced, and the friction coefficient is increased obviously with almost homogeneous melting salt at 0 ℃ for 100.0 h in water-saturation and decreased noise by 2.4 to 2.8 dB. The wet wheel wear and the load abrasion are decreased significantly. The skid resistance, snow melting, noise reduction and wear resistance properties of original pavement are improved significantly. Compared with the original pavement, the softening coefficient of pavement with overlaying super micro-surfacing material under saturated water condition for 100 h can reach 86.3%, which shows that the material has excellent water resistance property.