不同掺合料对装修垃圾和拆房垃圾流态填筑材料的性能影响及其工程应用  

Effects of Various Admixtures on the Performance of Renovation and Demolition Waste Flow Backfill Materials and Their Engineering Applications

作　　者：杨光 李阳[1,2] YANG Guang;LI yang(Shanghai Institute of Building Science Co.,Ltd.,Shanghai 200032,China;Shanghai Industrial Solid Waste Resources Utilization Technology Research Center,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院有限公司,上海200032 [2]上海工业固体废弃物资源化利用工程技术研究中心,上海200032

出　　处：《上海建材》2024年第1期17-23,共7页Shanghai Building Materials

基　　金：上海市国资委企业创新发展和能级提升资助项目(2022023);建筑垃圾细粉用于流态填筑材料的关键技术研究(KY10000038.20220024)。

摘　　要：装修垃圾和拆房垃圾成分复杂,是处理和利用难度较大的建筑垃圾,其再生骨料性能波动较大,性能指标难以满足相关标准要求,而流态填筑材料对强度要求不高,且具有自流平、易于混合和回填等优点,可广泛消纳各类工业固废和建筑垃圾。针对现有建筑垃圾流态填筑材料主要以水泥为固化材料的情况,研究了不同种类掺合料对流态填筑材料性能的影响规律。在此基础上,针对基坑回填工程,对装修垃圾和拆房垃圾流态填筑材料的配比进行了优化,并开展了工程示范应用。结果表明:掺入污泥焚烧灰后,装修垃圾和拆房垃圾流态填筑材料的流动性降幅最明显;掺入钢渣粉可对装修垃圾和拆房垃圾流态填筑材料的泌水率进行调控;掺入矿粉后流态填筑材料的抗压强度不会明显降低;掺入粉煤灰能有效改善流态填筑材料的泌水性能,并调控其流动性。Renovation waste and demolition waste consists with complex compositions,challenging the retreatment process and utilization as construction waste.Recycled aggregates from these sources present significant fluctuations in quality and performance,thus failing to complied with the required standards.Apart from being used in the production of cement bricks,there is insufficient effective methods for utilization.On the other hand,flow backfill materials have low strength requirements and advantages such as self-leveling,easy mixing,and backfilling capabilities,making them applicable for wide-ranging disposal of various industrial solid waste and construction debris.This paper focuses on the limitations of existing construction waste flow backfill materials,especially those using cement as a solidifying agent.The impact of different types of admixtures on the performance of flow backfill materials was studied.Research results show that,for renovation and demolition waste flow backfill materials,the addition of sludge incineration ash significantly reduces the fluidity.Incorporating steel slag powder increases the water permeability,while mineral powder slightly reduces the compressive strength.The inclusion of fly ash can effectively can improve material water permeability and regulates its flowability.Based on these findings,flow backfill materials for foundation pit backfilling projects involving renovation and demolition waste were determined and applied in the Yunnan Baiyao Shanghai International Center project.

关 键 词：装修垃圾 拆房垃圾 再生骨料 流态填筑 基坑回填 

分 类 号：TU528[建筑科学—建筑技术科学]