论文粉煤灰在再生混凝土中冻融试验研究 作者：迟铵.docVIP

科类 工科 编号（学号）2010313234 本科生毕业论文（设计） 粉煤灰在再生混凝土中冻融试验研究 In recycled concrete freeze-thaw test and research of fly ash 迟铵 指导教师：李丽生 高级实验师 云南农业大学 昆明 黑龙潭 650201 学 院: 水利学院 专 业： 土木工程 年级：2011级 论文（设计）提交日期：2015年4月16日答辩时间：2015年5 云南农业大学 2015 年 4月（云南农业大学水利学院,昆明 650201）设计In recycled concrete freeze-thaw test and research of fly ash ChiAn Kunming (yunnan agriculture university institute of water conservancy, 650201) ABSTRACT Recycled concrete as a kind of green building materials can not only solve treatment problem of waste concrete from the source, while saving the natural aggregate resource and alleviate the contradiction between supply and demand. In this experiment, natural aggregate, comprehensive and systematic research on the physical properties of recycled aggregate. Fly ash as admixture, adding natural concrete, recycled concrete, effect of fly ash on concrete performance. According to the natural aggregate concrete, recycled aggregate concrete C30 mixture ratio design, water cement ratio is 0.6, the incorporation KS-TJ for the high performance water reducing agent, fly ash with different dosage of 0%, 10%, 20%, 30%, to test. An analysis of the addition of fly ash into of natural aggregate concrete and recycled concrete compressive strength and frost thaw properties, for natural aggregate concrete and recycled concrete freezing and thawing cycles for 1,25,50, find out quality loss, dynamic elastic modulus, the influencing factors of compressive strength, carries on the analysis. Experimental results show that have a direct impact on different dosage of fly ash on concrete performances; after different times of freeze-thaw cycles, the incorporation of 10% fly ash and the compressive strength of recycled aggregate concrete is best, freeze thaw strength is the best. Key words: The natural aggregate；The recycled aggregate; Fly ash; The compression; Elastic modulus；Freeze-thaw cycle 目 录 第一章 绪 论 1 1.1 引言 1 1.2天然骨料混凝土和再生骨料混凝土国内外研究现状 2 1.2.1国