建筑垃圾-粉煤灰双掺混凝土桩地基处理性能研究  

Study on the Treatment Performance of Construction Waste Fly Ash Mixed with Concrete Pile Foundation

作　　者：马江萍[1] MA Jiangping(School of Architecture and Art Design,Xi'an Peihua University,Xi'an 710125,China)

机构地区：[1]西安培华学院建筑与艺术设计学院,陕西西安710125

出　　处：《粉煤灰综合利用》2020年第3期67-71,共5页Fly Ash Comprehensive Utilization

基　　金：西安培华学院2018年度科研项目(PHKT18018)。

摘　　要：为实现城市建筑垃圾及电厂粉煤灰等工程废物的合理回收与循环利用,本文基于室内无侧限抗压强度试验与现场静载试验,对不同配比条件下的建筑垃圾-粉煤灰双掺混凝土的力学性能及工程应用性能展开了深入研究。研究结果表明:(1)随着凝胶材料掺入比和水泥-粉煤灰比的提高,建筑垃圾-粉煤灰混凝土的抗压强度不断升高,但上升速度逐渐降低;(2)基于室内试验确定的双掺混凝土的最佳配比为凝胶材料掺入比15%、水泥-粉煤灰质量比2:1,根据该配比浇筑的混凝土桩对软土地基进行改良,复合地基平均承载力为493.63kPa,能够满足工程设计要求。In order to realize the reasonable recovery and recycling of urban construction waste and coal ash from power plants,based on the indoor unconfined compressive strength test and field static load test,the mechanical properties and engineering application performance of the concrete mixed with construction waste and fly ash in different proportions were studied in this paper.The results demonstrate that:(1)With the increase of gel material incorporation ratio and cement fly ash ratio,the compressive strength of construction waste fly ash concrete increases continuously,but the rising speed decreases gradually.(2)Based on the laboratory test,the best ratio of double admixture concrete is the gel material admixture ratio of 15%,and cement fly ash mass ratio is 2:1.The average bearing capacity of the composite foundation is 493.63kPa,which can meet the engineering design requirements.

关 键 词：建筑垃圾 粉煤灰 软土地基处理 性能研究 

分 类 号：TU501[建筑科学—建筑技术科学]