摘要
普通混凝土耐久性设计本质就是确定满足混凝土耐久性的水灰比和最小水泥用量。文中从耐久性分析入手 ,兼顾强度和耐久性两项指标 ,采用公式化方法直接对混凝土耐久性进行设计。该设计是以推导水灰比W/C、单位水泥用量C和混凝土强度fcu数学关系为基础 ,并通过分析将耐久性分为抗冻耐久性、碳化耐久性、酸根离子扩散耐久性以及耐磨耐久性 ,建立满足混凝土耐久性的水灰比的关系式 ,然后比较满足耐久性的水灰比和强度的水灰比且取小者 ,进而利用式 (4 )
The essence of common concrete durability design is to determine the w/c ratio and the minmal,cement consumption that can meet the demand of concrete durability,This paper adopts the formula method to directly design the mixture ration of concrete by analyzing durability while considering both strength and durability.Based on the deduction of the mathematical relationships of w/c ratio,unit cement consumption and concrete strength.f cu ,the formula of w/c ratio is established that meets durability index.Then ,comparing w/c ratio that meets durability with w/c ratio that meets strength,the lower one is chosen to calculate unit cement dosage by formula(4).In this paper concrete durability is divided into frost resistance durability,carbonization durability,acid radical diffusion durability and grinding durability.
出处
《低温建筑技术》
2003年第4期7-9,共3页
Low Temperature Architecture Technology
关键词
耐久性
混凝土
配合比设计
耐久性设计
Durability
Concrtet
Mixture ratio design
Durability design
