Study on the properties of foam concrete prepared with recycled powder from asphalt mixing station
The recycled powder is the dust recovered from the dust removal system of asphalt mixing station and can be used as an admixture in foam concrete due to its small particle size.In this study,the composite admixture(fly ash∶silica fume =1∶1)was used to pre-pare the benchmark group of foam concrete with A06 dry density grade,the recycled powder with particle sizes of 6-40 μm was selected to replace the composite admixture at proportions of 0%,20%,40%,60%,80%and 100%to prepare foam concrete,and the physical prop-erties were studied experimentally.The results show that the recycled powder can be used as an admixture in the foam concrete,and when the recycled powder admixture is 20%,the dry density grade of foam concrete is still A06,the fluidity,compressive strength,thermal con-ductivity and water absorption of foam concrete are 109.5 mm,5.46 MPa,0.1392 W/(m·K)and 35.88%respectively,the performance indexes are better than those of foam concrete of the benchmark group.
NETL
NSTL
万方数据
维普
