南疆硫酸盐渍土地区高性能混凝土抗侵蚀干湿循环试验研究

Study on Resistance Sulfate Corrosion of High-performance Concrete under Dry-wet Cycle Test in Xinjiang Saline Soil Area

在矿物掺合料的掺量为30%情况下,分析粉煤灰、矿渣粉、水胶比对硫酸盐侵蚀性能的影响,结果表明:矿物掺合料能明显改善混凝土抗硫酸盐侵蚀的性能;对混凝土抗硫酸盐侵蚀性能改善效果方面,粉煤灰略优于矿渣粉;水胶比对混凝土抗硫酸盐侵蚀性的影响明显,水胶比越小,试件的抗压强度折损系数越高、质量损失率越小,混凝土的抗硫酸盐侵蚀性能越好;反之,水胶比越大,混凝土的抗硫酸盐侵蚀能力越差。

The effect of fly ash,slag powder and water-cement ratio on the corrosion resistance of high-performance concrete was analyzed under the condition that the content of mineral admixture was 30%.The analysis results show that mineral admixtures can significantly improve the properties of resistance sulfate corrosion on concrete,and the anti-erosion effect of fly ash is slightly better than slag powder.The properties of resistance sulfate corrosion are significantly affected by water-binder ratio.The smaller water-binder ratio,better properties of resistance sulfate corrosio of high-performance concrete;the greater water-binder ratio,worse properties of resistance sulfate corrosio of high-performance concrete.