桥梁用C50高强混凝土抗酸雨侵蚀性能研究  

Study of Acid Rain Erosion Resistance Performance of C50 High-Strength Concrete Used for Bridges

作　　者：李益进[1] 孙鑫鹏[1] 尹健[1] 龚胜辉[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《世界桥梁》2010年第1期49-52,共4页World Bridges

摘　　要：根据广东佛山地区降雨的酸度和离子组成,为加速腐蚀,扩大离子浓度,配置pH值为4.3的酸液,考虑矿物掺合料品种和掺量的影响,采用喷淋法研究在酸雨侵蚀条件下桥梁用C50高强混凝土性能的劣化规律。研究结果表明:粉煤灰与矿渣双掺效果优于粉煤灰单掺和矿渣单掺,粉煤灰与矿渣双掺较佳配比为1∶4、总掺量为35%。In accordance with the acidity and ion composition of rain in Foshan district, Guangdong and in order to accelerate the erosion rate and reinforce the ion concentration, the acid liquid of pH value 4.3 is mixed. In consideration of the influence of the varieties and adding amount of mineral admixture and by using the spraying method, the degradation law of the performance of the C50 high-strength concrete used for bridges under the acid rain condition is studied. The results of the study show that the effect of adding both the fly ash and mineral slag is better than that of adding fly ash or mineral slag only. The rather good ratio of the mix proportioning of both the fly ash and mineral slag is 1 ： 4 and the total adding amount is 35%.

关 键 词：高强混凝土 抗酸雨侵蚀 喷淋法 掺合料 

分 类 号：U444[建筑科学—桥梁与隧道工程]