【摘要】 对掺Ⅱ级粉煤灰的混凝土,改变其水胶比和粉煤灰掺量,进行抗硫酸盐侵蚀试验,结果表明:水灰比为0.40的普通混凝土,无法抵抗硫酸根离子浓度2500~20250mg/L硫酸盐溶液侵蚀,其水泥石孔隙中侵蚀产物以石膏为主,侵蚀现象主要发生在试件的表层,具体形态表现为试件表层逐渐疏松、剥落。水胶比为0.40以下、粉煤灰掺量30%及其以上的混凝土能够抵抗硫酸根离子浓度为20250mg/L的硫酸盐侵蚀。更多还原

【Abstract】 Sulate resistarce experiments about Ⅱclass fly ash concrete wiht different ratio of water/cement and fly ash are carried out it shows that: Ordinary concrete water cement ratio of 0. 40can’t resist SO42-2500 ~ 20250 mg /L sulfate solution erosion,because Corrosion products is mainly gypsum in cement stone pore. Erosion occurs mainly in the surface of the specimens,the shape of specimen surface gradually loose,spalling.Water /cement ratio below 0. 40,more than 30% dosage of fly ash concrete can resist SO42-20250mg /L sulfate attack.更多还原