【作者】 贺鹏飞； 余志武； 刘鹏； 范洁； 陈颖； 黄星浩；

【Author】 HE Pengfei;YU Zhiwu;LIU Peng;FAN Jie;CHEN Ying;HUANG Xinghao;School of Civil Engineering,Central South University;National Engineering laboratory for High Speed Railway Cinstruction,Central South University;Changsha Planning and Design Institute Co.Ltd;

【机构】 中南大学土木工程学院； 中南大学高速铁路建造技术国家工程实验室； 长沙市规划设计院有限责任公司；

【摘要】 阐述了混凝土碳化机理、影响因素、碳化模型和防治措施等几个方面。研究认为混凝土碳化机理是二氧化碳侵入体系并与水泥水化产物反应、破坏体系化学平衡状态。混凝土碳化影响因素众多,主要分为内在因素、环境因素和施工因素等。国内外碳化模型主要有气体扩散理论模型、经验模型和半理论半经验模型。工程实用性较为成熟的模型认为混凝土碳化深度与碳化时间的平方根成正比。更多还原

【Abstract】 Carbonization mechanism,influencing factors,carbonization model and prevention measures of concrete are investigated. Carbonation mechanism of concrete is considered as the carbon dioxideintruding into the concrete and reacting with the hydration products,which changes the chemical equilibrium state of the harden paste. There are many factors affecting concrete carbonization,including internal factors,environmental factors and construction factors. Simultaneously,many carbonation models of concrete,such asthe gas diffusion theory model,the empirical model and the semi theoretical semiempirical model,are proposed. The classic model of concrete carbonation is regarded as the carbonation depth of concrete is proportional to the square root of the carbonation time.更多还原