孔结构对浮石混凝土抗压强度影响的试验研究  

Experimental Study on Influence of Pore Structure on Compressive Strength of Pumice Concrete

作　　者：张少敏 白英[1] 白岩[1] ZHANG Shao-min;BAI Ying;BAI Yan(School of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia,010018,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特市010018

出　　处：《建材技术与应用》2020年第1期9-12,共4页Research and Application of Building Materials

摘　　要：试验测得玄武岩纤维和橡胶浮石混凝土的含气量、比表面积、气孔平均弦长与孔径分布等参数,运用灰色理论建立各参数与混凝土的28 d抗压强度之间的联系,探究孔结构参数对浮石混凝土抗压强度的影响,试验表明:纤维掺量增加时,含气量对混凝土抗压强度影响最大,气孔平均弦长影响最小;孔径为200~300μm的孔对混凝土凝土的强度影响最大,而>400μm的孔影响最小。橡胶掺量增加时,气孔间距系数对混凝土抗压强度影响最大,比表面积影响最小;孔径为100~200μm的孔对混凝土抗压强度影响最大,而<100μm的孔影响最小。This paper explores the influence of pore structure parameters on the compressive strength of pumice concrete.Based on the parameters of air content,specific surface area,average chord length of air pores and pore size distribution of basalt fiber and rubber pumice concrete measured by the test,this paper uses the grey theory to establish the relationship between the parameters and the 28 d compressive strength.The results show that with the increase of fiber content,the air content has the greatest influence on the compressive strength and the smallest on the average chord length of air pores;the pores with D=200~300 μm have the greatest influence,while the ones with D>400 μm have the smallest.With the increase of rubber content,the influence of pore spacing coefficient is the largest,and the influence of contrast surface area is the smallest;the influence with pores(D=100~200 μm) are the largest,while that with D<100 μm are the smallest.

关 键 词：玄武岩纤维 轻骨料混凝土 抗压强度 灰色理论 气孔结构 

分 类 号：TU528.2[建筑科学—建筑技术科学]