砖混建筑垃圾资源化再生利用研究进展?
作者:
作者单位:

1.重庆大学土木工程学院;2.重庆科技大学 建筑工程学院;3.重庆高远建筑垃圾综合利用有限公司;4.上海市政工程设计研究总院(集团)有限公司

基金项目:

重庆市建设科技计划项目(城科字2024第2-2号) ;重庆英才创新创业示范团队项目(cstc2024ycjh-bgzxm0012);中央高校基本科研业务费资助项目(2023CDJKYJH105);上海市政工程设计研究总院(集团)有限公司科学研究项目(K2023K124A)


Research progress on recycling and utilization of brick-concrete
Author:
Affiliation:

1.School of Civil Engineering, Chongqing University;2.School of Civil Engineering and Architecture, Chongqing University of Science and Technology;3.Chongqing Gaoyuan construction waste recycling comprehensive utilisation Co., Ltd;4.Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.

Fund Project:

Chongqing Construction Science and Technology Plan Project (No. City Science-2024-2-2); Chongqing Talent Innovation and Entrepreneurship Demonstration Team Projects (No. cstc2024ycjh-bgzxm0012), the Fundamental Research Funds for the Central Universities (No. 2023CDJKYJH105) and Scientific Research Project of Shanghai Municipal Engineering Design Institute (Group) Co., Ltd (No. K2023K124A).

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    摘要:

    砖混结构的迭代更新将产生大量砖混建筑垃圾,资源化利用砖混建筑垃圾可有效解决天然砂石资源短缺和减轻建筑垃圾堆填危害。砖混再生材料根据粒径分为砖混再生粗骨料、细骨料和粉料三类。砖混再生粗骨料可作为再生混凝土和路基工程基层底基层等的骨料;再生细骨料常应用于再生砂浆、再生砌块和对土/固化土性能改良等方面。砖混再生粉化学成分与水泥、石灰粉、粉煤灰等相似,可通过离子交换、生成膨胀物质、火山灰反应和结晶等作用作为胶凝材料使用;废砖再生粉具有良好的火山灰活性,可作为原材料通过碱激发制备废砖再生粉基地聚合物胶凝材料,具有良好的流动性、力学性能和高温性能,反应机理主要包括Si、Al单体溶出、单体重构、缩聚和填充胶结等。砖混再生材料今后应在再生原材料性能提升、应用途径拓展、力学特性和固化机理、处置及应用标准制定等方面深入研究。

    Abstract:

    The iterative renewal of the brick-concrete structure will produce a large amount of brick-concrete construction waste, and the resource utilization of brick-concrete construction waste can effectively solve the shortage of natural sand and gravel resources as well as alleviate the harm of construction waste landfill. The brick-concrete recycled materials are divided into three categories according to the particle size: brick recycled coarse aggregate, fine aggregate and powder. Brick-concrete recycled coarse aggregate can be used as aggregate for recycled concrete and base course of road base project; recycled fine aggregate is often used in recycled mortar, recycled blocks and improved performance of soil /cured soil and so on. The chemical composition of brick-concrete recycled powder is similar to cement, lime powder, fly ash, etc., which can be used as cementitious materials through ion exchange, generation of expanded substances, pozzolanic reaction and crystallization, etc.; Waste brick recycled powder has good pozzolanic activity, which can be used as raw materials for the preparation of waste brick recycled powder base polymer cementitious materials through alkali excitation, which has good fluidity, mechanical properties and high-temperature performance, and the reaction mechanism mainly includes Si, Al monomer dissolution, monomer reconstruction, polycondensation and filling cementation. Brick-concrete recycled materials in the future should improve the performance of renewable raw materials, expansion of application way, mechanical properties and curing mechanism, disposal and application standards development and other aspects of in-depth research.

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  • 收稿日期:2024-10-16
  • 最后修改日期:2025-02-26
  • 录用日期:2025-03-05
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