磷渣基快速修补材料的制备及其混凝土性能

发布时间：2018-01-15 16:25

本文关键词：磷渣基快速修补材料的制备及其混凝土性能　出处：《混凝土》2017年11期 　论文类型：期刊论文

【摘要】：以磷渣粉为主要组分,辅以少量石墨尾矿粉、硅酸盐水泥等,采用模数1.4的水玻璃作激发剂、试剂K作调凝剂,制得了快硬、早强的碱激活磷渣基快速修补材料,其最优配合比为:磷渣粉∶石墨尾矿粉∶水泥∶矿物质材料A∶硅灰=0.79∶0.05∶0.09∶0.05∶0.02,水玻璃和调凝剂K的用量分别为5%(占胶凝材料总质量的百分比,下同)、1%。该配合比磷渣基材料的3、28 d强度达到P·O 42.5R级强度指标的要求,且12 h抗折、抗压强度分别为3.6、17.1 MPa,可用于快速修补加固工程。用此材料制备了C30、C50混凝土,试验研究了其收缩、抗冻性、抗硫酸盐侵蚀性等性能。结果表明:该磷渣基快速修补混凝土28 d收缩率为(544~854)×10-6;抗硫酸盐等级不低于KS90;抗冻等级F100以上,略优于同批制作的相同强度等级的硅酸盐水泥混凝土。
[Abstract]:Using phosphorus slag powder as the main component, a small amount of graphite tailings powder, Portland cement and so on, using sodium silicate with modulus 1.4 as the activator and reagent K as the coagulant, the rapid hardening was obtained. Early alkali activated phosphorous slag based fast repair material. The optimum mixture ratio is: phosphorus slag powder: graphite tailings powder: cement: mineral material A: silica fume 0.79: 0.05: 0.09: 0.05: 0.02. The dosage of water glass and coagulant K are 5% (percentage of the total mass of cementing material, respectively). The proportion of phosphorus slag based material is 3. The 28d strength reached the requirement of P 路O _ 42.5R grade strength, and the compressive strength was 3.6 ~ 17.1 MPa at 12 h. C30C50 concrete was prepared with this material, and its shrinkage and frost resistance were studied experimentally. The results show that the shrinkage of the rapidly repaired concrete based on phosphorous slag is 544% 854) 脳 10 ~ (-6) in 28 days. Sulfate resistance grade is not lower than KS90; Frost resistance grade F 100 above, slightly better than the same strength of the same batch of Portland cement concrete.
【作者单位】：三峡大学土木与建筑学院;三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心;
【基金】：国家自然科学基金面上项目(51379111) 湖北省科技支撑计划项目(2014BCB035) 防灾减灾湖北省重点实验室(三峡大学)开放基金项目(2016KJZ09) 三峡大学研究生科研创新基金项目(SDYC2016020)
【分类号】：TU528
【正文快照】： 0引言我国已经经历了几十年的基础设施建设高峰期,而随着经济社会的发展,越来越多的在役建筑物由于设计与建设时技术和资金的限制,以及服役期内管理上的不足等原因,导致其功能退化或可靠性下降而需要维修加固。因此,进行混凝土修补材料,尤其是具有快硬、早强特性的快速修补材

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