安徽引江济淮蜀山船闸混凝土碳化防治技术研究与应用  

Research and application of concrete carbonization prevention and control technology for Shushan Shiplock of the Yangtze-to-Huaihe Water Diversion Project in Anhui

作　　者：吴彰彪 于方 刘振亚[1] 王英凝 WU Zhang-biao;YU Fang;LIU Zhen-ya;WANG Ying-ning(The Fifth Construction Co.,Ltd.of CCCC Forth Harbor Engineering Co.,Ltd.,Fuzhou,Fujian 350008,China;CCCC Forth Harbor Engineering Institute Co.,Ltd.,Key Laboratory of Harbor&Marine Structure Durability Technology of the Ministry of Communications,Guangzhou,Guangdong 510230,China)

机构地区：[1]中交四航局第五工程有限公司,福建福州350008 [2]中交四航工程研究院有限公司,水工构造物耐久性技术交通行业重点实验室,广东广州510230

出　　处：《中国港湾建设》2024年第6期39-44,共6页China Harbour Engineering

基　　金：国家重点研发计划(2022YFB2603000)。

摘　　要：安徽引江济淮蜀山船闸工程混凝土的早期碳化深度较大,对采用回弹法进行混凝土的强度评定造成了较大的影响,也在一定程度上影响了混凝土的耐久性使用寿命。从碳化抑制剂种类、开始涂刷时间和涂刷遍数等方面,研究了碳化抑制剂对混凝土碳化深度的影响。结果表明:氟硅酸镁类碳化抑制剂的抗碳化效果要优于硅酸钠类的;碳化抑制剂的开始涂刷时间越早,混凝土的抗碳化性能越好;碳化抑制剂的涂刷遍数越多,抗碳化效果越好,以涂刷2~3遍为宜;采用氟硅酸镁类碳化抑制剂可大大降低混凝土的碳化深度,值得在工程中推广应用,尤其是对耐久性要求较高的低标号大体积混凝土工程。The early carbonation depth of the concrete for the Shushan Shiplock of the Yangtze-to-Huaihe Water Diversion Project in Anhui is relatively large,which has a significant impact on the strength evaluation of concrete using rebound method and also to some extent affects the durability and service life of concrete.The influence of carbonation inhibitors on the depth of concrete carbonation was studied from the aspects of the types of carbonation inhibitors,the start time of coating,and the number of coating.The results show that the anti-carbonization effect of magnesium fluorosilicate based carbonization inhibitors is better than that of sodium silicate based carbonization inhibitors;the earlier the start of coating of carbonation inhibitors,the better the carbonation resistance of concrete;the more times a carbonization inhibitor is applied,the better its anti-carbonization effect,and it is advisable to coat 2-3 times;the use of magnesium fluorosilicate carbonation inhibitors can greatly reduce the carbonation depth of concrete,and is worthy of promotion and application in engineering,especially in low grade large volume concrete projects with high durability requirements.

关 键 词：养护方式 碳化深度 回弹强度 碳化抑制剂 

分 类 号：U654[交通运输工程—港口、海岸及近海工程] TU528.1[交通运输工程—船舶与海洋工程]