高贝利特水泥混凝土的断裂韧性  

Fracture Toughness of High Belite Cement Concrete

作　　者：王可良[1] 隋同波 许尚杰[1] 张文生[3] 刘玲 

机构地区：[1]山东省水利科学研究院,济南250014 [2]中材国际工程股份有限公司,北京100080 [3]中国建筑材料科学研究总院,北京100024 [4]济南德利泰建材科技公司,济南250010

出　　处：《硅酸盐学报》2012年第8期1139-1142,共4页Journal of The Chinese Ceramic Society

基　　金：国家"十一五"科技支撑计划(2006BAJ03A09)资助项目

摘　　要：为研究高贝利特水泥混凝土的断裂性能,通过三点弯曲梁试验,比较了高贝利特水泥混凝土与硅酸盐混凝土的双K断裂参数。结合载荷–裂口张开位移曲线分析,探讨了高贝利特水泥混凝土的断裂能。结果表明:高贝利特水泥混凝土载荷–裂口张开位移曲线下覆盖的面积大于硅酸盐水泥混凝土,混凝土对载荷能量有较高的吸收能力,断裂能大,断裂韧度大;高贝利特水泥混凝土的起裂韧度和失稳韧度分别是硅酸盐水泥混凝土的1.17倍和1.24倍。高贝利特水泥混凝土的断裂性能优于硅酸盐水泥混凝土的。The fracture toughness of high belite cement concrete was investigated. For this purpose, three-point bend tests were carried out on high belite cement concrete and silicate cement concrete, respectively. The double-K fracture parameters were determined. The fracture energy of high belite cement concrete was analyzed based on a pressure---crack-mouth-opening-displacement curve. The results reveal that there is more area covered by the pressure---crack-mouth-opening-displacement curve of high belite cement con- crete than that of silicate cement concrete. This reflects that the high belite cement concrete has a higher adsorptive capacity of load energy and a greater fracture toughness. The fracture energy of high belite cement concrete is greater, resulting in that the initial frac- ture toughness and unstable fracture toughness are 1.17 times and 1.24 times as great as those of silicate cement concrete, respectively The fracture performance of high belite cement concrete is thus better than that of silicate cement concrete.

关 键 词：高贝利特水泥混凝土 断裂参数 三点弯曲试验 断裂能 

分 类 号：TQ172[化学工程—水泥工业]