[1]霍润科,韩飞,李曙光,等.受酸腐蚀砂岩物理化学及力学性质的试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(01):21-26.[doi:10.15986/j.1006-7930.2019.01.004]
　HUO Runke,HAN Fei,LI Shuguang,et al.Experimental study on physicochemical and mechanical properties of acid-corroded sandstone[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(01):21-26.[doi:10.15986/j.1006-7930.2019.01.004]
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受酸腐蚀砂岩物理化学及力学性质的试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年01期
页码:
21-26
栏目:
出版日期:
2019-02-28

文章信息/Info

Title:
Experimental study on physicochemical and mechanical properties of acid-corroded sandstone
文章编号:
1006-7930(2019)01-0021-06
作者:
霍润科; 韩飞; 李曙光; 王国杰
(西安建筑科技大学土木工程学院,陕西 西安 710055)
Author(s):
HUO Runke;  HAN Fei;  LI Shuguang;  WANG Guojie
(School of Civil Engineering, Xian Univ. of arch. & Tech., Xian 710055, China)
关键词:
砂岩; 酸腐蚀; 力学特性; 本构模型; CT扫描
Keywords:
sandstone;  acid corrosion;  mechanical properties;  constitutive model;  CT scanning
分类号:
TU45
DOI:
10.15986/j.1006-7930.2019.01.004
文献标志码:
A
摘要:
通过对不同腐蚀阶段不同浓度硫酸溶液的pH值、阳离子浓度、砂岩质量等的变化进行监测，结合单轴压缩试验和CT扫描试验，对砂岩受酸腐蚀过程中的物理、化学及力学性质进行分析.基于引申的Lemaitre应变等效原理，建立受酸腐蚀砂岩的损伤本构模型.研究结果表明:（1）砂岩岩样在不同浓度硫酸溶液中浸泡的不同阶段，其质量变化及溶液的pH值变化都呈现出明显的阶段性特征;（2）阳离子溶蚀速率均在反应初期达到最大值，且Ca2+溶蚀速率最快，相同浸泡阶段，硫酸溶液浓度越强其阳离子的溶蚀速率越大；（3）随着浸泡时间的延长，砂岩单轴抗压强度减小，岩样从弹塑性阶段到破坏阶段的过程延长，岩样的损伤变量呈增大趋势
Abstract:
Through monitoring the changes of pH value, cationic concentration and mass of sandstone in different concentrations of H2SO4 solution at different corrosion stages, and by combining with uniaxial compression test and CT scan test, the physical, chemical and mechanical properties of sandstone were analyzed. Based on the extended lemaitre strain equivalent principle, the damage constitutive model of acid-corroded sandstone is established. Results showed that: (1 )The mass change of sandstone samples and the change of pH value of the solution immersed in different concentrations of H2SO4 solution show obvious phased characteristics at different stages. (2)The dissolution rate of the cationic solution reached the maximum at the initial stage of the reaction, and the dissolution rate of the Ca2+ was the fastest, and the higher the concentration of H2SO4 solution, the greater the rate of dissolution of the cation at the same soaking stage. (3)With the extension of immersion time, the uniaxial compressive strength of sandstone decreased, and the process of rock samples from elastic-plastic stage to failure stage was prolonged, and the damage variable of rock samples increased.

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备注/Memo

备注/Memo:
收稿日期:2018-02-01
修改稿日期:2019-01-15
基金项目:国家自然科学基金项目(41172237) 资助
作者简介:霍润科（1963—），男，博士，教授，主要从事环境岩土工程方面的教学和科研工作.E-mail：huorkdq@xauat.edu.cn
更新日期/Last Update: 2019-03-05