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Abstract：
The cracking of cement-stabilized macadam (CSM) reflects to the asphalt layer, which is one of the reasons for the failure of pavement performance and structure. Adding asphalt emulsion to CSM can effectively prevent the formation of cracks. The primary purpose of this article is to reveal the effect of asphalt emulsions on the performance of CSM by adding different contents of asphalt emulsion. For this purpose, tests of unconfined compressive strength (UCS), flexural tensile strength (FTS), elastic modulus, and frost resistance were performed on CSM with gradations of CSM-5 and CSM-10 (the maximum particle sizes of the macadam in the gradation composition are 5 mm and 10 mm), respectively. The test results showed that the UCS of CSM decreased with the increment of asphalt emulsion content. The FTS and elastic modulus of CSM increased with the content of asphalt emulsion. Based on the FTS test results, the frost resistance coefficient Km1, defined according to the CSM splitting strength prior to and subsequent to freeze-thaw, was used to evaluate the frost resistance. The test results showed that the frost resistance of CSM improved with the increase in asphalt emulsion content for the same cement content. In conclusion, adding asphalt emulsion to CSM has positive effects on the FTS, elastic modulus, and frost resistance. Therefore, for the purpose of maintaining the UCS value of CSM, the content of cement should be considered at the same time as the controlling of the content of asphalt emulsion.
摘要：
水泥稳定碎石(CSM)开裂反映到沥青层,是导致路面性能和结构失效的原因之一。在CSM中加入乳化沥青可以有效防止裂缝的形成。本文的主要目的是通过添加不同含量的沥青乳液来揭示沥青乳液对CSM性能的影响。为此,无侧限抗压强度(UCS)试验，弯曲拉伸强度（FTS），弹性模量,并对CSM进行了抗冻性，等级为CSM-5和CSM-10（等级组合物中碎石的最大粒径为5mm和10mm），分别。试验结果表明，CSM的UCS随乳化沥青掺量的增加而降低。CSM的FTS和弹性模量随沥青乳液掺量的增加而增加。根据FTS测试结果,根据冻融前后的CSM劈裂强度定义的抗冻系数Km1，用于评估抗冻性。试验结果表明，在水泥掺量相同的情况下，CSM的抗冻性随着沥青乳液掺量的增加而提高。总之,向CSM中添加乳化沥青对FTS有积极影响，弹性模量,和抗冻性。因此,为了保持CSM的UCS值，水泥的掺量应与乳化沥青掺量的控制同时考虑。
