高原干燥高寒地区混凝土碳化性能研究

Study on carbonation performance of concrete in dry and cold plateau areas

为西部大开发提供技术支持、保证混凝土工程质量、以青海省玉树援建项目为依托,开展了高原干燥高寒地区混凝土碳化性能研究。在相同外部环境条件下,研究混凝土粉煤灰掺量、混凝土强度等级对混凝土碳化的影响;在相同混凝土配合比、相同二氧化碳浓度条件下,研究温湿度对混凝土碳化的影响;研究不同地区混凝土碳化情况。研究表明:随粉煤灰掺量的提高、混凝土强度的降低,混凝土碳化深度增大;随温度的增高、相对湿度的降低,混凝土碳化深度增大;环境温度对混凝土碳化的影响大于环境相对湿度对混凝土碳化的影响。

Provide technical support for the development of the western region, ensure the quality of concrete engineering, based on rebuilding project in Yushu Qinghai province, carried out studding on carbonation performance of concrete in dry and cold plateau areas. Under the same external environment conditions, fl y ash content, concrete strength grade infl uence on concrete carbonation; Under the same concrete mix, carbon dioxide concentrations, temperature and humidity infl uence on concrete carbonation; Carbonation of concrete case studied in different areas.Results showed that with the increase of fl y ash, reduce of the concrete strength, concrete carbonation depth increases; with the increasing of the temperature, reduce of the relative humidity, concrete carbonation depth increases; effect of environmental temperature on carbonation of concrete is greater than the infl uence of relative humidity on concrete carbonation.