玻璃粉对混凝土酸侵蚀性能的影响

Influence of glass powder on acid corrosion resistance of concrete

采用试验方法,研究了玻璃粉替代胶凝材料在不同掺量(0、5%、8%、15%)时对混凝土抗压强度和耐酸侵蚀性的影响。对比了各个试样在5%H2SO4溶液和5%CH3COOH溶液中腐蚀28 d后的质量亏损和抗压强度损失,并采用SEM分析了试样腐蚀后的表面形貌。结果表明,玻璃粉有利于提高混凝土的耐H2SO4和CH3COOH侵蚀性,耐CH3COOH侵蚀差于耐H2SO4腐蚀,H2SO4侵蚀后的试样表面形成了大量石膏,CH3COOH侵蚀后试样表面疏松并出现了大量孔洞和裂纹。当玻璃粉掺量为8%时,试样的耐H2SO4和CH3COOH侵蚀性最佳。

The influence of different amounts of glass powder substituting for cementitious materials（0,5%,8%,and 15% by weight） on the compressive strength and acid corrosion resistance of concrete was studied through experiments. The mass loss and compressive strength loss of various specimens were compared after corrosion in 5%H2SO4solution and 5% CH3 COOH solution for 28 d. The morphology of the specimens after corrosion was analyzed using SEM. The results show that the addition of glass powder can improve the corrosion resistance of concrete to H2SO4 and CH3COOH,and the resistance of concrete to CH3 COOH was worse than the resistance to H2SO4. A great deal of gypsum formed on the surface of the specimens corroded by H2SO4. The surface of specimens corroded by CH3 COOH became loose,with a large amount of pores and cracks. When the substitution amount of glass powder was 8%,the specimens showed the best corrosion resistance to H2SO4 and CH3COOH.