改性钢渣微粉混凝土碳化试验研究  

Experimental study on carbonation of modified steel slagmicro powder concrete

作　　者：黄榜彪[1] 张宇 黄秉章 杨子建 李广峰 潘丽华 HUANG Bangbiao;ZHANG Yu;HUANG Bingzhang;YANG Zijian;LI Guangfeng;PAN Lihua(School of Civil and Architecture Engineering,Guangxi University of Science and Technology,Liuzhou 545000,China;Department of Civil Engineering,Liuzhou Institute of Technology,Liuzhou 545000,China;Guangxi Zhuang Autonomous Region Prefabricated Building Life Cycle Management andVirtual Simulation Engineering Technology Center,Liuzhou 545000,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545000 [2]柳州工学院土木工程系,广西柳州545000 [3]广西壮族自治区装配式建筑生命全周期管理与虚拟仿真工程技术中心,广西柳州545000

出　　处：《功能材料》2025年第1期1147-1155,共9页Journal of Functional Materials

基　　金：广西重点研发计划项目(桂科AB22080083);广西重点研发计划项目(桂科AB23026065);科技攻关与新产品试制(2022CCC0101)。

摘　　要：研究了改性钢渣微粉混凝土的碳化性能,通过快速碳化法测试了不同掺量沸石粉和钢渣微粉对混凝土劈裂抗拉强度和碳化深度的影响。试验结果表明,适量掺入钢渣和沸石粉的混凝土抗压强度和劈裂抗拉强度最佳,但过量掺入会导致强度下降。碳化试验显示,不同碳化龄期后劈裂抗拉强度变化与碳化前基本一致,碳化对劈裂抗拉强度影响微小。随着时间增加,劈裂抗拉强度逐渐提高,碳化后混凝土碳化深度随时间增加,掺入沸石粉降低抗碳化性能,但对钢渣微粉活性影响小。适量沸石粉可改善结构、抗碳化性,过量会加速碳化。通过Matlab建立的二次多项式非线性回归模型成功描述了混凝土试件的碳化深度与时间的关系,为混凝土结构碳化深度预测提供了重要参考价值。In this paper,the carbonation properties of modified steel slag micronized concrete were investigated,and the effects of different dosages of zeolite powder and steel slag micronized powder on the splitting tensile strength and carbonation depth of concrete were tested by the rapid carbonation method.The test results showed that the compressive strength and splitting tensile strength of concrete with moderate admixture of steel slag and zeolite powder were optimal,but excessive admixture would lead to a decrease in strength.The carbonation test showed that the change in splitting tensile strength after different carbonation ages was the same as that before carbonation,and the carbonation had a tiny effect on splitting tensile strength.With the increase of time,the splitting tensile strength gradually increased,the carbonation depth of the concrete after carbonation increased with time,and the admixture of zeolite powder decreased the anti-carbonation performance,but the effect on the activity of steel slag micronized powder was small.A moderate amount of zeolite powder can improve the structure and carbonation resistance,and an excessive amount will accelerate the carbonation.The quadratic polynomial nonlinear regression model established by Matlab successfully describes the relationship between the carbonation depth and time of concrete specimens,which provides an important reference value for the prediction of the carbonation depth of concrete structures.

关 键 词：碳化试验 钢渣微粉 沸石粉 混凝土 非线性回归模型 

分 类 号：TU521.2[建筑科学—建筑技术科学]