[1]余 健,左晓宝,汤玉娟.软水环境下砂浆钙溶蚀过程及孔隙率变化分析[J].南京理工大学学报(自然科学版),2016,40(03):366.[doi:10.14177/j.cnki.32-1397n.2016.40.03.020]
 Yu Jian,Zuo Xiaobao,Tang Yujuan.Analysis of calcium leaching process and porosity change of mortar under environment of soft water[J].Journal of Nanjing University of Science and Technology,2016,40(03):366.[doi:10.14177/j.cnki.32-1397n.2016.40.03.020]
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软水环境下砂浆钙溶蚀过程及孔隙率变化分析
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
40卷
期数:
2016年03期
页码:
366
栏目:
出版日期:
2016-06-30

文章信息/Info

Title:
Analysis of calcium leaching process and porosity change of mortar under environment of soft water
文章编号:
1005-9830(2016)03-0366-08
作者:
余 健左晓宝汤玉娟
南京理工大学 理学院,江苏 南京 210094
Author(s):
Yu JianZuo XiaobaoTang Yujuan
School of Science,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
软水环境 水泥 砂浆 钙溶蚀 孔隙率 Fick定律 Gerard固液平衡方程 Ca(OH)2 称重法
Keywords:
soft water environment cement mortar calcium leaching porosity Fick's law Gerard's solid-liquid equilibrium equation Ca(OH)2 weighing method
分类号:
TU528.01
DOI:
10.14177/j.cnki.32-1397n.2016.40.03.020
摘要:
为了快速获得水泥基材料钙溶蚀进程的有效实验数据,该文根据Fick定律和Gerard固液平衡方程,建立了软水环境下水泥砂浆圆柱体试件的钙溶蚀模型。给出了钙溶蚀过程中试件孔隙率和Ca(OH)2浓度分布的计算方法。进行了6M NH4Cl溶液中水泥砂浆圆柱体试件的加速钙溶蚀实验。利用称重法获得了钙溶蚀引起的试件孔隙率随溶蚀时间的变化规律。将圆柱体试件孔隙率的模型计算值与实验测试值进行了对比。进行了钙溶蚀过程中圆柱体试件孔隙率和Ca(OH)2浓度时空
Abstract:
To get the effective experimental data of calcium leaching process for cement based material quickly,a model of calcium leaching of mortar in cylinder specimens under an environment of soft water is established using Fick's law and Gerard's solid-liquid equilibrium equation.Computing methods of porosity and Ca(OH)2 content for mortar in the leaching process are presented.Experiments on the accelerated leaching of the mortar specimens immersed into 6M NH4Cl solution with different water-cement ratio are carried out.A changing law of the porosity of these mortar specimens with leaching time is obtained by the weighing method.The porosities calculated by the model are compared with the experimental results to validate the model.The space-time changes of the porosity and Ca(OH)2 content of the mortar specimens are analyzed numerically.The results show that:the model is consistent with the experiments; in the scope of the leaching depth of the mortar specimens,the porosity increases with the leaching time,and the porosity of the surface for the mortar specimens increases rapidly in the initial stage of the leaching time; but the Ca(OH)2 content decreases with the increase of the leaching time,and decreases quickly at the beginning of leaching.

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备注/Memo

备注/Memo:
收稿日期:2015-04-13 修回日期:2016-01-02
基金项目:国家自然科学基金(51378262); 江苏省自然科学基金(BK20141396)。
作者简介:余健(1990-),男,硕士生,主要研究方向:混凝土材料与结构,E-mail:zuoxb717@sina.com; 通讯作者:左晓宝(1968-),男,教授,博士生导师,主要研究方向:混凝土材料与结构、防灾工程,E-mail:xbzuo@sina.com。
引文格式:余健,左晓宝,汤玉娟.软水环境下砂浆钙溶蚀过程及孔隙率变化分析[J].南京理工大学学报,2016,40(3):366-373.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2016-06-30