高钛型高炉渣混凝土碳化深度试验研究  

Experimental study on the prediction model of carbonization depth in high Ti-bearing blast furnace slag concrete

作　　者：汪杰 李根 梁月华 干斌 赵翼 Wang Jie;Li Gen;Liang Yuehua;Gan Bin;Zhao Yi(College of Civil and Architectural Engineering,Panzhihua University,Panzhihua 617000,Sichuan,China;China 19th Metallurgical Group Co.,Ltd.,Panzhihua 617000,Sichuan,China;Sichuan Provincial Key Lab.of Process Equipment and Control,Yibin 643002,Sichuan,China)

机构地区：[1]攀枝花学院土木与建筑工程学院,四川攀枝花617000 [2]中国十九冶集团有限公司,四川攀枝花617000 [3]过程装备与控制工程四川省高校重点实验室,四川宜宾643002

出　　处：《钢铁钒钛》2022年第2期101-106,共6页Iron Steel Vanadium Titanium

基　　金：四川省科技计划项目(编号:2020JDRC0137);桥梁无损检测与工程计算四川省高校重点实验室开放基金金(编号:2018QYY01);过程装备与控制工程四川省高校重点实验室开放基金(编号:GK201918)。

摘　　要：混凝土碳化造成钢筋锈蚀是混凝土结构耐久性失效的主要原因。为研究攀枝花高钛型高炉渣混凝土抗碳化性能,对不同强度高钛型高炉渣混凝土进行不同碳化时间的室内加速碳化试验,结果表明:高钛型高炉渣混凝土强度越低,越容易被二氧化碳侵蚀;碳化时间越长,碳化现象越明显。基于Fick第一定律,根据高钛型高炉渣混凝土强度、碳化时间,建立了高钛型高炉渣混凝土碳化深度预测模型。经与试验结果对比,吻合度高,验证了预测模型准确度。Reinforcement corrosion caused by concrete carbonation is the main reason of durability failure of concrete structures. In order to study the carbonation resistance of Panzhihua high-titanium blast furnace slag concrete, we herein carried out the indoor accelerated carbonation test of high-titanium blast furnace slag concrete with different strength at different carbonation time. The results show that the lower the strength of high-titanium blast furnace slag concrete, the easier it is to be corroded by carbon dioxide. The longer the carbonation time, the more obvious the carbonation phenomenon. Based on Fick’s first law, a model for predicting the carbonation depth of high-titanium blast furnace slag concrete is established according to the strength and carbonation time of high-titanium blast furnace slag concrete. By comparing with the experimental results, the accuracy of the prediction model is verified.

关 键 词：高钛型高炉渣 混凝土 碳化深度 预测模型 

分 类 号：X757[环境科学与工程—环境工程] TU37[建筑科学—结构工程]