中文摘要：

采用万能材料试验机对CRTSⅠ型无砟轨道水泥乳化沥青砂浆的不同配合比水泥—沥青胶凝材料（CAB）进行应力—应变压缩试验,并结合真空饱水、沥青抽滤等方法分析其物相组成。依据高沥灰比（A/C）CAB的物理结构模型,将其视为水化产物增强沥青基复合材料。借鉴颗粒增强聚合物基复合材料的相关理论,得到CAB的弹性模量与其组成参数的定量关系。研究发现,水泥水化物相的体积分数是影响CAB弹性模量的本质因素;Mooney方程最适合表征CAB的弹性性能,且CAB的弹性模量与水化物相的体积分数呈指数关系。为增强公式的实用性,在CAB各物相体积分数与其配合比参数的定量关系基础上,推导出CAB的弹性模量与沥灰比、水灰比和水化度等组成参数的数学关系式。

英文摘要：

Cement asphalt binder（CAB）is the cementitious material of cement emulsified asphalt mortar used in CRTS Ⅰ type ballastless track.In this paper,the stress-strain compression test of CABs with different mix proportions were measured by electronic universal testing machine and the phase compositions were analyzed by means of vacuum saturation and asphalt extraction.According to the physical structure model of CAB with high asphalt cement ratio,it could be regarded as a hydration product reinforced asphalt-based composite.In reference to the related theories of polymer matrix composites reinforced with particle,the quantitative relationship between the elastic modulus and composition parameters of CAB was obtained.Research shows that the volume fraction of cement hydration phase is the essential factor that affects the elastic modulus of CAB.Mooney equation is the most suitable to characterize the elastic property of CAB,and exponential relationship is between elastic modulus and the volume fraction of cement hydration phase.In order to enhance the practicality of the formula,on the basis of the quantitative relationship between each phase volume fraction and its mix proportion parameter of CAB,the mathematical relations between the elastic modulus of CAB and the composition parameters with regard to asphalt cement ratio,water cement ratio and hydration degree have been derived.