考虑碳化作用的水工混凝土耐久性研究  

Study on the Durability of Hydraulic Concrete Considering Carbonization

作　　者：车明杰 CHE Mingjie(PowerChina Chengdu Engineering Corporation Limited,Chengdu Sichuan 610072)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《四川水力发电》2023年第6期108-111,共4页Sichuan Hydropower

摘　　要：水工混凝土在自然界中可能受到碳化侵蚀,碳化后混凝土体积收缩,严重者甚至产生裂缝,混凝土开裂会造成混凝土内部钢筋锈蚀从而进一步加剧裂缝,最终导致水工混凝土结构破坏,极大的影响着水工混凝土的耐久性。笔者通过配制不同配合比水工混凝土试件进行碳化试验,得到不同水灰比和不同减水剂掺量的水工混凝土在4 d、7 d、14 d、28 d龄期的碳化深度结果,并对碳化试验结果进行分析,通过分析碳化深度的变化趋势,为考虑碳化作用下合理设计水工混凝土水灰比及减水剂掺量提供研究数据,进一步为碳化作用下水工混凝土寿命预测提供了研究基础。Hydraulic concrete may be subjected to carbonation erosion in nature.After carbonation,the volume of concrete shrinks,and in severe cases,cracks may even occur.Concrete cracking can cause corrosion of internal steel bars in the concrete,further exacerbating the cracks,ultimately leading to structural damage to hydraulic concrete,greatly affecting the durability of hydraulic concrete.The author conducted carbonation tests on hydraulic concrete specimens with different mix ratios,and obtained the carbonation depth results of hydraulic concrete with different water cement ratios and water reducing agent dosages at the ages of 4,7,14,and 28 days.The carbonation test results were analyzed,the variation trend of carbonation depth was analyzed to provide research data for the rational design of hydraulic concrete water cement ratio and water reducing agent dosage under carbonization,and further providing a research basis for predicting the lifespan of hydraulic concrete under carbonization.

关 键 词：碳化作用 水工混凝土 耐久性 

分 类 号：TV431[水利工程—水工结构工程] TV331