基于水化度及其结构组成的自密实混凝土基本徐变计算模型  

BASIC CREEP MODEL OF SELF-COMPACTING CONCRETE BASED ON HYDRATION DEGREE AND MATERIAL COMPOSITION

作　　者：郑建岚[1] 晁鹏飞[1] 

机构地区：[1]福州大学土木工程学院福建,福州350108

出　　处：《工程力学》2009年第12期71-75,共5页Engineering Mechanics

基　　金：国家自然科学基金项目(50878056,50978060)

摘　　要：该文根据自密实混凝土水化曲线形式,采用指数函数体现混凝土老化作用的"固结度",推导了自密实混凝土粘弹性相徐变度积分表达式的闭合形式解;同时根据自密实混凝土结构组成的复合性,提出整体自密实混凝土的基本徐变表达式,在试验基础上验证了计算模型的适用性。Based on the analysis of the hydration curve of self-compacting concrete （SCC）, the closed form solutions for the integral equations about basic creep of viscoelastic parts of SCC are derived by using the exponential formulation to express the ＂solidification degree＂ of aging concrete. The theoretical formulas for predicting the basic creep of whole SCC from its composition and the properties of constituents are deduced. The model is calibrated by experimental data from creep and adiabatic temperature rise tests, and the results indicate that the model presented in this study can calculate the basic creep of SCC excellently.

关 键 词：自密实混凝土 基本徐变 固化理论 水化度 计算模型 

分 类 号：TU528.1[建筑科学—建筑技术科学]