沥青拌和站回收粉制备泡沫混凝土的性能研究  

Study on the properties of foam concrete prepared with recycled powder from asphalt mixing station

作　　者：徐勤敏 朱亚光[1] 徐培蓁[1] XU Qinmin;ZHU Yaguang;XU Peizhen(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525

出　　处：《青岛理工大学学报》2024年第1期59-65,共7页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(51878365)。

摘　　要：回收粉是沥青拌和站除尘系统回收的粉尘,粒度较细可以作为掺和料应用于泡沫混凝土。采用复合掺和料(粉煤灰∶硅灰=1∶1)制备A06干密度等级的泡沫混凝土基准组,选取粒径集中于6~40μm的回收粉以0%,20%,40%,60%,80%,100%的比例取代复合掺和料制备泡沫混凝土,并对其物理性能进行试验研究。结果表明,回收粉可以作为掺和料应用于泡沫混凝土,当回收粉掺量为20%时,泡沫混凝土的干密度等级仍为A06,流动性、抗压强度、导热系数和吸水率分别为109.5 mm,5.46 MPa,0.1392 W/(m·K)和35.88%,性能指标优于基准组泡沫混凝土。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 prepare the benchmark group of foam concrete with A06 dry density grade,the recycled powder with particle sizes of 6-40μm was selected to replace the composite admixture at proportions of 0%,20%,40%,60%,80%and 100%to prepare foam concrete,and the physical properties 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 conductivity 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.

关 键 词：泡沫混凝土 回收粉 干密度 抗压强度 

分 类 号：TU528.2[建筑科学—建筑技术科学]