长江科学院院报2019，Vol.36Issue(12)：96-101,106,7.DOI:10.11988/ckyyb.20180043
受酸腐蚀砂岩力学性质及孔隙结构变化研究
Mechanics Properties and Pore Structure Change of Acid-corroded Sandstone
摘要
Abstract
In the aim of obtaining the changes in mechanical properties and porosity of sandstone in acid environ-ment, we examined the influences of corrosion time and acid concentration on sandstone’s mechanics properties and porosity through uniaxial compression test on acid-corroded sandstone. Results revealed an apparent corrosion effect on sandstone. The porosity of sandstone soaked in acid solution increased, as reflected by an evident expan-sion of porosity area in SEM images; the volume of porosity is in positive relation with acid concentration and corro-sion time. Moreover, the uniaxial compressive strength and elastic modulus of sandstone deteriorated remarkably af-ter acid corrosion. The uniaxial compressive strength of sandstone corroded by pH = 1 sulfuric acid solution and pH= 3 sulfuric acid solution decreased by 31. 59% and 26. 99%, respectively, and the elastic modulus reduced by 64. 46% and 62. 26%, respectively. In addition, the relation between chemical damage variable based on second-ary porosity and mechanics parameters was established; the deterioration of mechanical parameters of sandstone is consistent with the change of secondary porosity.关键词
砂岩/水岩化学反应/孔隙率/化学损伤/腐蚀机制/单轴抗压强度/弹性模量Key words
sandstone/water-rock chemical reaction/porosity/chemical damage/corrosion mechanism/uniaxial compressive strength/elastic modulus分类
建筑与水利引用本文复制引用
霍润科,王国杰,李曙光,任振中,韩飞..受酸腐蚀砂岩力学性质及孔隙结构变化研究[J].长江科学院院报,2019,36(12):96-101,106,7.基金项目
国家自然科学基金项目(41172237) （41172237）
陕西省教育厅专项基金项目(11JK0947) （11JK0947）
