纳米TiO_(2)混凝土抗碳化性能的试验研究  

Experimental study on carbonization performance of nano-TiO_(2) concrete

作　　者：赵燕茹[1] 李传华 贾宗明 张杰 ZHAO Yanru;LI Chuanhua;JIA Zongming;ZHANG Jie(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;College of Science,Inner Mongolia University of Technology,Hohhot 010051,China;Mongolian Branch,Huaneng New Energy Co.,Ltd.,Hohhot 010020,China)

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学理学院,内蒙古呼和浩特010051 [3]华能新能源股份有限公司蒙西分公司,内蒙古呼和浩特010020

出　　处：《混凝土》2024年第6期116-120,共5页Concrete

基　　金：国家自然科学基金(12162025,11762015);内蒙古自治区自然科学基金(2021LHMS05010)。

摘　　要：纳米TiO_(2)以同等质量代替水泥(0、1%、3%、5%)掺入混凝土中,对纳米TiO_(2)混凝土进行抗压试验和碳化试验,研究了纳米TiO_(2)的掺量对混凝土抗压强度和碳化深度的影响,建立了考虑纳米TiO_(2)掺量和碳化龄期的混凝土碳化深度模型。结果显示:掺入适量的纳米TiO_(2)对混凝土的抗压强度和碳化性能的改善有很好的促进作用,且随着纳米TiO_(2)掺入量的增加对两者的促进作用呈现先升高后降低的趋势,纳米TiO_(2)掺量为1%时对混凝土性能促进作用最好。通过引入纳米TiO_(2)对混凝土碳化深度的影响系数,改进碳化深度模型。模型预测数据和试验数据吻合度较高,可应用于纳米TiO_(2)混凝土碳化深度的预测。Nano-TiO_(2) was mixed into concrete with the same quality instead of cement(0,1%,3%,5%).The compressive test and carbonation test of nano-TiO_(2) concrete were carried out.The effect of nano-TiO_(2) content on the compressive strength and carbonation depth of concrete was studied.The carbonation depth model of concrete considering nano-TiO_(2) content and carbonation age was established.The results show that the addition of appropriate amount of nano-TiO_(2) has a good promotion effect on the improvement of compressive strength and carbonization performance of concrete,and with the increase of nano-TiO_(2) content,the promotion effect on the two increases first and then decreases.When the content of nano-TiO_(2) is 1%,the performance of concrete is the best.The carbonation depth model was improved by introducing the influence coefficient of nano-TiO_(2) on the carbonation depth of concrete.The model prediction data are in good agreement with the experimental data,which can be applied to the prediction of carbonation depth of nano-TiO_(2) concrete.

关 键 词：碳化模型 纳米TiO_(2) 混凝土 碳化性能 抗压强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]