填料级配及浓度对心墙沥青混凝土的性能影响分析

水工沥青混凝土的力学性能是骨料与沥青胶浆共同作用的结果,填料的级配和浓度对沥青胶浆的性质有重要影响。本文采用激光粒度分析仪测定了填料级配,以5种填料级配和3种填料浓度配制沥青胶浆,对其进行针入度、软化点和拉伸强度试验,得出填料级配及浓度对沥青胶浆物理、力学性能的影响规律,随着填料细度及浓度的增加,沥青胶浆的粘性增大,物理力学性能增强。填料浓度对心墙沥青混凝土的性能影响较大,级配相同时,随着填料浓度的增加,马歇尔稳定度增大,流值减小。

Influence of filler gradation and concentration on performance of core wall asphalt concrete

Mechanical properties of asphalt concrete is the result of common effect of aggregate and asphalt mortar.The grading and the concentration of filler have important effect on the properties of asphalt mortar.This paper used laser particle size analyzer to measure the grading of filler.The asphalt mortar was prepared with 5 kinds of filler and 3 kinds of filler concentration,it carried out the test of penetration, softening point and tensile strength,and got the influence law of filler gradation and filler concentration on the physical and mechanical property of asphalt mortar.With the increase of filler fineness and concentration,the physical and mechanical properties of asphalt mortar strengths,the viscosity increases.The filler concentration have greater effect on the performance of core wall asphalt concrete.When the filler gradation is the same,with the increase of filler concentration, Marshall stability increases and the flow value decreases.