CRTSⅠ型板式轨道水泥沥青砂浆试验研究

Experimental Study on Cement Asphalt Mortar of CRTS-Ⅰ Slab Track

水泥沥青砂浆固化以后能够提供一定的强度和弹性,在无砟轨道结构中具有重要的作用,拟通过水泥沥青砂浆组成材料对其性能的影响研究,全面提升CRTSⅠ型板式无砟轨道水泥沥青砂浆的性能。以CRTSⅠ型板式无砟轨道用水泥沥青砂浆为试验研究对象,系统进行了水泥、细骨料、乳液、铝粉等原材料与其性能的相互关系试验研究。CRTSⅠ型板式无砟轨道用砂浆配制时宜选用早期强度较高的硫铝酸盐水泥,且砂浆强度随胶砂比增加而增加了;乳化沥青的性能品质对砂浆具有重要影响;铝粉可以调节膨胀率和弹性模量的大小。

The cement asphalt mortar can provide a certain strength and elasticity after curing,so it plays an important role in the structure of ballastless tracks.To comprehensively improve the performance of the cement asphalt mortars of CRTSⅠ slab ballastless track,the influence of material composition of it on its performance are studied in this paper.This paper takes the cement asphalt mortar adopted by CRTSⅠ slab ballastless track as the study object and analyzes the relationship between the raw materials such as the cement,fine aggregate,emulsion,aluminum powder and the cement mortar.The study results show that the early high strength sulphoaluminate cement should be selected for CRTSⅠ slab ballastless track;the mortar strength increases with the increase of cement to sand radio;emulsified asphalt quality has important influence on mortars;aluminum powder can be utilized to adjust the expansion ratio and elastic modulus.