乳化沥青对CA砂浆动态黏弹性能的影响

Effect of emulsified asphalt on dynamic viscoelastic of CA mortar

为了研究交变荷载作用下CA砂浆的黏弹性能,通过试验分析了温度、沥灰比(A/C)、水灰比(W/C)和砂灰(CS/C)对CA砂浆储能模量、耗能模量和损耗因子的影响。结果表明:温度越高,储能模量越低,损耗因子越大,而耗能模量随温度的升高先增大后减小,当温度为10℃时耗能模量最大;随着A/C的增大,储能模量逐渐减小,损耗因子逐渐增大,而耗能模量随AIC的变化规律与所选的温度区间有关;相比阳离子乳化沥青,选用阴离子乳化沥青时CA砂浆具有更高的刚度和吸能减震能力;W/C和S/C对砂浆动态粘弹性能的影响与A/C的大小密切相关.

In order to study viscoelastic of CA mortar under alternating loads, this paper analyzed the influence of temperature, lek cement ratio (A/C), water-cement ratio (W/C) and sand-cement ratio (S/C) on storage modulus, loss modulus and loss factor of CA mortar through experiments. The results showed that the higher the temperature, the lower the storage modulus, and the greater the loss factor, with increasing t*emperature loss modulus showed a trend of first increases and then decreases, when the temperature was at 10 ℃ loss modulus reaches a maximum value.with the A/C is increased the storage modulus gradually decreases,the loss factor gradually increases,while the loss modulus variation with AIC related the selected temperature range, compared to the cationic emulsified asphalt,when chose anionic emulsified asphalt > the CA mortar has a higher stiffness and better energy absorption damping capacity. The effect of W/C and S/C on the dynamic viscoelastic properties of the mortar is closely related to A/C size.