再生骨料混凝土性能研究

发布时间：2018-02-28 23:36

本文关键词： 再生骨料再生混凝土水胶比取代率耐久性能　出处：《华侨大学》2014年硕士论文　论文类型：学位论文

【摘要】：再生骨料混凝土工程技术，是将废弃混凝土等建筑材料，经破碎加工，制成粗细骨料，再用于生产混凝土的技术，它既可以解决废弃混凝土等建筑垃圾对环境污染的问题，还能节省天然骨料矿物资源的开采使用，避免对天然矿产资源的过度开发损耗，并能有效缓解骨料供求矛盾，社会、经济和环境效益显著。因此，本课题针对再生骨料混凝土，主要做了以下研究: (1)探讨了再生粗骨料的生产工艺及其物理特性再生骨料品质差异是决定再生骨料混凝土和普通混凝土性能差别的根本性因素。从再生粗骨料生产工艺出发，，探讨了再生粗骨料的品质特性。分析了其对混凝土性能的影响机理。 (2)选用水胶比从0.35到0.65的不同水胶比再生骨料混凝土与普通混凝土性能进行试验比较，主要测试了混凝土的拌合物工作性能、力学性能及耐久性能，其中耐久性选取了以下指标：抗水渗透试验（渗水高度法）、抗冻试验（快冻法）、抗氯离子渗透试验（电通量法）、碳化试验（28d）、收缩试验。研究总结再生骨料对混凝土性能的影响规律。 (3)采用不同骨料取代比例（0，25%，50%，75%，100%），对再生骨料不同取代率的再生骨料混凝土拌合物施工性能、力学性能（抗压强度）及耐久性能的进行测试，分析总结再生骨料在混凝土应用中的性能变化规律。 (4)再生混凝土在我司自建工程中的应用分析，效果良好。
[Abstract]:The engineering technology of recycled aggregate concrete is the technology of crushing and processing waste concrete and other building materials, making coarse aggregate and then being used to produce concrete. It can not only solve the problem of environmental pollution caused by waste concrete and other construction waste, but also solve the problem of environmental pollution caused by waste concrete and other construction wastes. It can also save the exploitation and use of natural aggregate mineral resources, avoid over-exploitation and depletion of natural mineral resources, and effectively alleviate the contradiction between aggregate supply and demand, social, economic and environmental benefits. Therefore, this paper aims at recycled aggregate concrete. The following studies have been done:. 1) the production process and physical characteristics of recycled coarse aggregate were discussed. The quality difference of recycled aggregate is the fundamental factor to determine the difference between recycled aggregate concrete and ordinary concrete. The quality characteristics of recycled coarse aggregate are discussed and its influence mechanism on concrete performance is analyzed. (2) the performances of recycled aggregate concrete with different water-binder ratios from 0.35 to 0.65 are tested and compared with that of ordinary concrete. The performance, mechanical properties and durability of concrete are mainly tested. Among them, the durability selected the following indexes: water permeation test (percolation height test, freezing resistance test (quick freezing method), chloride ion permeation test (electric flux method, carbonation test, shrinkage test, etc.). The study summarized the effect of regenerated aggregate on coagulation. The influence of soil properties. (3) adopting different aggregate replacement ratios to test the construction performance, mechanical properties (compressive strength) and durability of recycled aggregate concrete with different replacement ratio of recycled aggregate. The performance change of recycled aggregate in concrete application is analyzed and summarized. The application analysis of recycled concrete in our self-built project shows good effect.
【学位授予单位】：华侨大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528

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