摘要
通过物理发泡制备干密度为700 kg/m^3的泡沫混凝土,研究不同细砂掺量对试样抗压强度和吸水率的影响,同时利用数码显微镜和图像分析软件分析试样的孔隙率、平均孔径和圆度等气孔结构参数,并将气孔结构参数与抗压强度、吸水率进行数据拟合分析。结果表明:随着细砂掺量的增大,试样孔隙率和平均孔径逐渐增大、圆度降低,28 d抗压强度逐渐降低而吸水率增大,当掺量为15%~45%时,其平均孔径明显变大,圆度减小,抗压强度降低及吸水率增大的趋势较为明显。
A dry density of 700 kg/m^3 foam concrete specimens is prepared by physical foaming system,different effects of fine sand content on the compressive strength rate and water absorption of specimens are expounded,and samples of the porosity,average pore diameter and roundness values of pore structure parameters are analyzed by using a digital microscope and image analysis software,the pore structure parameters are fitted with compressive strength and water absorption. The results show that the porosity and average pore size increase,the roundness decreases,the compressive strength decreases and the water absorption increases,with the increase of fine sand content. When the dosage is 15%～45%,the average pore size is obviously larger,the roundness decreases,the compressive strength decreases and the water absorption increases.
作者
周利睿
耿飞
林辉
朱玉翔
孙亚飞
吴春晓
解建光
ZHOU Li-rui;GENG Fei;LIN Hui;ZHU Yu-xiang;SUN Ya-fei;WU Chun-xiao;XIE Jian-guang(College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Wuxi Wall Materials Innovation and Bulk Cement Office, Wuxi 214001, Jiangsu, China;Department of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, China)
出处
《建筑节能》
CAS
2018年第5期135-138,145,共5页
BUILDING ENERGY EFFICIENCY
基金
"十二五"国家科技支撑计划:乡土特色保护与传承技术研究与示范(2015BAL02B02)
江苏重点研发项目(现代农业):农房节能和乡村道路生态化技术研究与示范(BE2015349)
2016年度江苏省墙体材料革新科研项目(201605)
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20160107)
中央高校基本科研业务费专项资金资助项目
住房与城乡建设部科技项目(2015-K4-023)
关键词
泡沫混凝土
细砂
抗压强度
吸水率
气孔结构
foam concrete
fine sand
compressive strength
water absorption
pore structure
