长江科学院院报2013，Vol.30Issue(9)：64-68,5.DOI:10.3969/j.issn.1001-5485.2013.09.013
酸对云冈石窟砂岩的劣化作用试验研究
Acid-Induced Degradation of Sand Rock in Yungang Grottoes
严绍军 1谭松娥 1刘俊红 1赵玉波1
作者信息
- 1. 中国地质大学(武汉)工程学院,武汉430074
- 折叠
摘要
Abstract
Datong city,where the Yungang Grottoes is located in,is an important coal producing and coal chemical industry base in China.The SO2 concentration in the Grottoes area exceeds the standard because of air pollution.The feldspar and calcareous cement,which are the main mineral compositions of the sandstone in Yungang Grottoes,are very sensitive to acid.A sulfuric acid solution and sand rock reaction test was carried out to simulate the rock degradation.To study the mechanism of Grottoes rock deterioration caused by sulfuric acid,three steps are included in the test:immersing the sandstone samples into static sulfuric acid solution of different pH values ; measuring the solution' s pH value,the mass and wave velocity of sandstone samples during the tests; and comparing the changes of samples' compressive strength and physical structure before and after the test.Test results show that the sulfuric acid poses very quick degradation on calcium cementation sandstones,and it mainly focuses on damaging the calcium cement.As the reaction cycle increases,the wave velocity declined markedly.Degradation by sulfuric acid is extremely serious on the surface layer of sandstone samples.With the loss of calcareous cement,the rock strength reduces significantly.关键词
云冈石窟/砂岩/硫酸/劣化作用Key words
Yungang Grottoes / sandstone / sulfuric acid / degradation分类
建筑与水利引用本文复制引用
严绍军,谭松娥,刘俊红,赵玉波..酸对云冈石窟砂岩的劣化作用试验研究[J].长江科学院院报,2013,30(9):64-68,5.
