研究了CRTS I 型水泥乳化沥青砂浆(CA 砂浆)在不同应变率加载条件下的总应变能、耗散应变能和弹性应变能的演变规律，结果表明:应变率越大，CA 砂浆内部积聚的弹性应变能越多，峰值应力越大;弹性应变能在峰值应力前大量积聚，之后不断释放转化为破裂面贯通的表面能;应变率越大，弹性应变能占总应变能的比例(W e /W)减小的幅度越小，但弹性应变能的释放量越大，释放的速率也越高，CA 砂浆强度衰减越快，脆性越明显;耗散应变能随应变增大而不断增加，耗散应变能主要以裂纹的扩展与错位摩擦的方式产生;应变率越大，CA 砂浆内部产生的细小裂纹越多，裂纹的扩展受到变形速率的限制，耗散应变能占总应变能的比例(W d /W)越小．

This paper deals with the evolution rules of the total strain energy,the dissipated strain energy and theelastic strain energy of CRTS I cement- emulsified asphalt mortar (CA mortar) at various strain rates.The resultsshow that (1) the higher the strain rate,the more accumulated elastic strain energy in the CA mortar and the higherthe peak stress; (2) a large amount of the elastic strain energy accumulates before the peak stress and is continu-ously released and then translated into the surface energy perforating the rupture surface; (3) with the increase ofthe strain rate,the reduced extent of the proportion of the elastic strain energy accounting for the total strain energy(W e /W) decreases,but the release amount and the rate of the elastic strain energy increase,the strength of CAmortar decays faster,and the brittleness becomes more obvious; (4) the dissipated strain energy constantly increaseswith the increase of strain,and is mainly produced in the way of propagation and dislocation friction of cracks; and(5) with the increase of the strain rate,more small cracks are produced in the CA mortar,and the propagation ofcracks is limited by the deformation rate,so that the proportion of the dissipated strain energy accounting for the to-tal strain energy (W d /W) becomes smaller.