摘要
乳化橡胶沥青蒸发残留物的流变性能决定了其路用性能.通过动态频率扫描试验、温度扫描试验、MSCR试验、低温蠕变试验,研究了乳化橡胶沥青蒸发残留物的流变性能并与乳化前橡胶沥青的性能进行了对比.结果表明:与橡胶沥青相比,乳化橡胶沥青蒸发残留物的复数剪切模量(G*)、活化能(Ea)、存储模量(G')、损失模量(G")、失效温度变大,相位角(δ)降低,高温性能更好.恢复率(R)较大,不可恢复蠕变柔量(Jnr)降低,具有更加优异的高温抗车辙能力.蠕变劲度(S)较大,蠕变速率(m)较小,且在相同温度条件下S/m值更大,表明其低温性能降低.
Abstract
The rheological properties of emulsified rubber asphalt evaporation residue determine its road performance.For this reason,this study investigated the rheological properties of emulsified rubber asphalt e-vaporation residue and compared them with those of rubber asphalt before emulsification through dynamic fre-quency scanning test,temperature scanning test,MSCR test,and low-temperature creep test.The results show that compared with rubber asphalt,the G*,activation energy Ea,G',G",and failure temperature of e-mulsified rubber asphalt evaporation residue become larger,and the phase angle(δ)decreases,and its high temperature performance is better.The recovery rate(R)of the evaporated residue of emulsified rubber as-phalt is larger,the irrecoverable creep flexibility(Jnr)is reduced,and it has more excellent high temperature rutting resistance.The evaporated residue of emulsified rubber asphalt has a larger value of creep strength(S),a smaller value of creep rate(m),and a larger value of S/m under the same temperature conditions,indicating that its low-temperature performance is reduced.
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