摘要
基于碳化试验的经验模型,通过室内快速碳化试验研究水泥用量、水胶比、环境温度、环境湿度、CO_2浓度与混凝土碳化深度的关系,结果表明:随着水泥用量的增加,混凝土各龄期的碳化深度逐渐降低;随着水胶比的增大、粉煤灰掺量的提高、环境温度的升高、CO_2浓度的增加,混凝土各龄期的碳化深度逐渐增加;随着环境相对湿度的增加,混凝土碳化深度先增大后减小,在70%湿度下最大。研究为混凝土残余寿命的评估提供了理论支撑,具有一定的应用推广价值。
Based on the empirical model of carbonation test, this paper studies the effects of cement content, water-cement ratio, temperature, humidity, CO2 concentration on carbonation depth by indoor rapid carbonation test. The results show that the carbonization depth of concrete decreases gradually with cement amount increases, the carbonization depth of concrete increases with the increase of water-cement ratio, fly ash content, ambient temperature and CO2 concentration, the carbonization depth of concrete increases first and then decreases with relative humidity increases, and when humidity is 70%, carbonization depth of concrete is the largest. The paper provides theoretical support for the evaluation of residual concrete life and has a certain application value.
作者
黄丽
沈东美
HUANG Li;SHEN Dongmei(JSTI Group, Nanjing 210019, China)
出处
《现代交通技术》
2018年第2期4-5,37,共3页
Modern Transportation Technology
关键词
混凝土
碳化深度
残余寿命
影响因素
concrete
carbonization depth
residual life
influence factor
