基于快速碳化试验的结构混凝土抗碳化性能研究

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发布时间：2020-01-06 00:00:00

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基于快速碳化试验的结构混凝土抗碳化性能研究

Study on Carbonation Resistance of Structural Concrete Based on Rapid Carbonation Test

2023年第6期

不带浆层芯样；带自然碳化浆层芯样；快速碳化试验；水工混凝土；碳化深度预测方程

Core sample without mortar layer; Core sample with natural carbonation mortar layer; Rapid carbonation test; Hydraulic concrete; Prediction equation for carbonization depth

2023年第6期

10.19761/j.1000-4637.2023.06.080.05

安徽省自然科学基金资助项目（2208085US11）；无损技术检测教育部重点实验室开放基金项目（EW201980091）；安徽省（水利部淮河水利委员会）水利科学研究院科技攻关项目（KJGG201901）。

刘长顺１，郑磊2，张成银１，张景奎１，许军才3

１.安徽省（水利部淮河水利委员会）水利科学研究院，安徽蚌埠 233000；2.南京水利科学研究院，江苏南京 210029；3.河海大学，江苏南京 210098

刘长顺１，郑磊2，张成银１，张景奎１，许军才3

刘长顺,郑磊,张成银,等.基于快速碳化试验的结构混凝土抗碳化性能研究[J].混凝土与水泥制品,2023(6):80-84.

LIU C S,ZHENG L,ZHANG C Y,et al.Study on Carbonation Resistance of Structural Concrete Based on Rapid Carbonation Test[J].China Concrete and Cement Product,2023(6):80-84.

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摘要：针对某水工混凝土结构实体，对不同部位、不同强度的不带浆层芯样（A类试件）、带自然碳化浆层芯样（B类试件）进行了快速碳化试验，分别建立了A、B类试件在自然碳化环境下的碳化深度预测方程。结果表明：A类试件的早期碳化深度小于B类试件；随着碳化时间的增长，A类试件的碳化深度会超过B类试件；混凝土的抗压强度越大，A、B类试件达到相同碳化深度所需的时间越长；A类试件的碳化速度系数大于0.50，而B类试件的碳化速度系数小于0.50，说明自然碳化浆层能在一定程度上延缓碳化；基于A、B类试件建立的试验室碳化深度预测方程可用于混凝土结构抗碳化性能的合格性判定；基于B类试件建立的自然碳化深度预测方程的精度较高。 Abstract: A rapid carbonation test was conducted on different parts and strengths of concrete structural entities in a certain hydraulic concrete engineering, including core sample without mortar layer (type A specimen) and core sample with natural carbonation mortar layer (types B specimen), and the prediction equations for carbonization depth of type A and type B specimen in natural carbonization environment were established respectively. The results show that the early carbonization depth of type A specimen is lower than that of type B specimen. As the carbonization time increases, the carbonization depth of type A specimen will exceed that of type B specimen. The greater the compressive strength of concrete, the longer it takes for type A and type B specimen to reach the same carbonization depth. The carbonization rate coefficient of type A specimen is greater than 0.50, while the carbonization rate coefficient of type B specimen is less than 0.50, indicating that the natural carbonization mortar layer can delay carbonization to a certain extent. The experimental carbonation depth prediction equations established based on type A and type B specimen can be used for determining the qualification of the carbonation resistance of concrete structure. The accuracy of the natural carbonation depth prediction equation established based on type B specimen is high.

英文名 : Study on Carbonation Resistance of Structural Concrete Based on Rapid Carbonation Test

刊期 : 2023年第6期

关键词 : 不带浆层芯样；带自然碳化浆层芯样；快速碳化试验；水工混凝土；碳化深度预测方程

Key words : Core sample without mortar layer; Core sample with natural carbonation mortar layer; Rapid carbonation test; Hydraulic concrete; Prediction equation for carbonization depth

刊期 : 2023年第6期

DOI : 10.19761/j.1000-4637.2023.06.080.05

文章编号 :

基金项目 : 安徽省自然科学基金资助项目（2208085US11）；无损技术检测教育部重点实验室开放基金项目（EW201980091）；安徽省（水利部淮河水利委员会）水利科学研究院科技攻关项目（KJGG201901）。

作者 : 刘长顺１，郑磊2，张成银１，张景奎１，许军才3

单位 : １.安徽省（水利部淮河水利委员会）水利科学研究院，安徽蚌埠 233000；2.南京水利科学研究院，江苏南京 210029；3.河海大学，江苏南京 210098

刘长顺１，郑磊2，张成银１，张景奎１，许军才3

刘长顺,郑磊,张成银,等.基于快速碳化试验的结构混凝土抗碳化性能研究[J].混凝土与水泥制品,2023(6):80-84.

LIU C S,ZHENG L,ZHANG C Y,et al.Study on Carbonation Resistance of Structural Concrete Based on Rapid Carbonation Test[J].China Concrete and Cement Product,2023(6):80-84.

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摘要

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参考文献

引用本文

Abstract: A rapid carbonation test was conducted on different parts and strengths of concrete structural entities in a certain hydraulic concrete engineering, including core sample without mortar layer (type A specimen) and core sample with natural carbonation mortar layer (types B specimen), and the prediction equations for carbonization depth of type A and type B specimen in natural carbonization environment were established respectively. The results show that the early carbonization depth of type A specimen is lower than that of type B specimen. As the carbonization time increases, the carbonization depth of type A specimen will exceed that of type B specimen. The greater the compressive strength of concrete, the longer it takes for type A and type B specimen to reach the same carbonization depth. The carbonization rate coefficient of type A specimen is greater than 0.50, while the carbonization rate coefficient of type B specimen is less than 0.50, indicating that the natural carbonization mortar layer can delay carbonization to a certain extent. The experimental carbonation depth prediction equations established based on type A and type B specimen can be used for determining the qualification of the carbonation resistance of concrete structure. The accuracy of the natural carbonation depth prediction equation established based on type B specimen is high.

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基于快速碳化试验的结构混凝土抗碳化性能研究

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