长江科学院院报2024，Vol.41Issue(11)：172-180,9.DOI:10.11988/ckyyb.20230603
掺钢渣粉PVA纤维增强水泥基复合材料抗硫酸盐侵蚀性研究
Sulfate Resistance of Steel Slag Powder PVA Fiber-Reinforced Cement Composite Material
摘要
Abstract
To explore the reuse of steel slag powder in PVA-ECC(Polyvinyl Alcohol Engineered Cementitious Com-posite),we produced PVA-ECC samples by incorporating steel slag powder at various mass fractions.We measured the mass change,compressive strength,and tensile performance of the test samples in Na2SO4 solution(with a mass fraction of 5％)during dry-wet cycle accelerated sulfate attack tests,cubic compressive strength tests,and axial tensile tests.By microstructural and phase analysis using scanning electron microscopy(SEM)and X-ray dif-fraction(XRD)meter,we examined the influence of steel slag powder content on the sulfate resistance of PVA-ECC.Results indicate that when the steel slag powder content in PVA-ECC reaches 20％,the mass loss remains lower than that of the reference group.PVA-ECC with a low dosage of steel slag powder demonstrates sound corro-sion resistance,with compressive and corrosion resistance coefficients of 1.13,1.02,and 0.96 for the S20 group,respectively.PVA-ECC specimens containing steel slag powder exhibited multiple cracks;however,the addition of steel slag powder enhanced tensile strength,with a maximum increase of 31.4％observed in the S40 group.The in-clusion of an appropriate amount of steel slag powder effectively mitigates corrosion damage,with no significant ma-terial deterioration observed within the studied age range when the addition does not exceed 60％.关键词
PVA纤维/钢渣粉/硫酸盐侵蚀/干湿循环/拉伸强度/耐久性能Key words
PVA fiber/steel slag powder/sulfate attack/dry-wet cycle/tensile strength/durability performance分类
建筑与水利引用本文复制引用
苏骏,范子康,蔡新华,肖沭..掺钢渣粉PVA纤维增强水泥基复合材料抗硫酸盐侵蚀性研究[J].长江科学院院报,2024,41(11):172-180,9.基金项目
国家自然科学基金面上项目(52178247) （52178247）
湖南省水利科技项目(XSKJ2021000-15) （XSKJ2021000-15）
