大掺量粉煤灰混凝土配比计算模型的建立与应用  

Establishment and Application on Mixture Proportions Computing Model of High Fly-Ash Content Concrete

作　　者：余丽武[1] 

机构地区：[1]南京工程学院建筑工程学院,江苏南京211167

出　　处：《江西师范大学学报（自然科学版）》2009年第6期687-691,共5页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：江西省科技厅社会发展攻关项目(赣财教[2005]132号);江西省科技厅自然科学基金(0650143)资助项目

摘　　要：引入粉煤灰胶凝系数β的概念,把粉煤灰作为混凝土的一个独立组分,并区分其在混凝土中的不同作用.提出大掺量粉煤灰混凝土配合比设计的4个基本参数,推导确定4个参数的理论公式,建立了大掺量粉煤灰混凝土配合比设计计算模型,并通过实验考察配合比设计方法的合理性.结果表明:试验结果与原设计要求能较好地符合;粉煤灰掺量越高,混凝土各龄期的强度则越低;HFCC的抗压强度与胶凝系数β成正比,与灰胶比K成反比.Drawed into the cementitious coefficient β,regarded fly ash as an independent component,and differentiated the different action of fly ash in concrete,the foure basic parameters of the design of mixture proportions of high fly-ash content concrete are brought forward.The formulas of the four basic parameters are deduced,and a new design methed of mixture proportions of high fly-ash content concrete is established,then the retionality of the design methed are inspected by experiment.The results show the consistency, the concrete strengths of different ages decrease along with the fly ash content increasing, and the compress strength is directly proportional to the cementitious coefficient β and is inversely proportional to the cement-fly ash ratio K.

关 键 词：大掺量粉煤灰混凝土 配合比设计 胶凝系数 计算模型 力学性能 

分 类 号：TU528.042[建筑科学—建筑技术科学]