矿渣-水泥固化碱渣土的工程特性

发布时间：2017-12-27 16:47

本文关键词：矿渣-水泥固化碱渣土的工程特性　出处：《建筑材料学报》2017年04期 　论文类型：期刊论文

【摘要】：以天津港北疆港区的废弃碱渣为研究对象,提出了利用高炉矿渣微粉(GGBS)、水泥对高含水率碱渣进行固化处理的方法,并对基于模糊评价法得到的优选配合比固化碱渣土的压缩特性进行了研究.结果表明:同等固化剂掺量下,混掺固化剂的固化碱渣土的强度要高于单掺固化剂的固化碱渣土;基于优选配合比(3%水泥+8%GGBS)的固化碱渣土压缩系数及压缩指数随龄期的延长不断降低,而结构屈服应力不断增大.固化碱渣土的压缩性能在屈服前后变化很大,建议工程中应确保上部荷载不能超出其结构屈服应力,以免发生突然破坏.
[Abstract]:In the northern port of Tianjin port waste residue as the research object, proposed the use of blast furnace slag powder (GGBS), the method for curing cement soda residue with high water content, and the optimized fuzzy evaluation method with the research than the compression characteristics of alkali residue based on curing. The results showed that: the same mixing amount of curing agent under the mixed curing of soda residue soil curing agent content the strength is higher than that of single doped alkali muck curing curing agent; optimum mix ratio (based on 3% cement +8%GGBS) curing soda residue soil compression coefficient and compression index with increasing age decreases, while the yield stress increased. The compression performance of solidified alkali residue changes in the great yield before and after, to ensure that the upper load cannot exceed the yield stress should be recommended in the project, so as to avoid the occurrence of sudden failure.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;河海大学江苏省岩土工程技术工程研究中心;交通运输部天津水运工程科学研究院;
【基金】：浙江省交通运输厅科技计划项目(2014H28) 中央级公益性科研院所基本科研业务费专项资金项目(TKS140209) “十二五”国家科技支撑计划项目(2015BAB07B06)
【分类号】：X781.2
【正文快照】： 中国多采用氨碱法进行纯碱生产,而氨碱法制碱过程中产生大量的碱渣,不仅污染环境且占用土地资源,由于其高含水量、高压缩性、失水性差,导致处理存在很大困难.在欧美等国家就因碱渣污染处理困难将氨碱法遗弃或采用控制手段避免碱渣的产生[1-2].目前,国内常用的处理方法主要为:(

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