废渣替代率对再生混凝土性能的影响与分析  

The influence and analysis of waste residue substitution rate on the performance of recycled concrete

作　　者：石海丽[1] 何慕 朱晓莉 孔德玉[4] SHI Haili;HE Mu;ZHU Xiaoli;KONG Deyu(Shaoxing Vocational&Technical College,Shaoxing 312000,China;College of Geography and Environmental Sciences,Zhejiang Normal University,Jinhua 321004,China;Shaoxing Metro Construction Group,Shaoxing 312000,China;Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]绍兴职业技术学院,浙江绍兴312000 [2]浙江师范大学地理与环境科学学院,浙江金华321004 [3]绍兴轨道交通建设集团,浙江绍兴312000 [4]浙江工业大学,浙江杭州310014

出　　处：《新型建筑材料》2025年第2期37-39,48,共4页New Building Materials

基　　金：浙江省重点研发计划项目(2020C04013)。

摘　　要：对某混凝土搅拌站废渣进行成分分析,研究了不同废渣替代率对再生混凝土工作性能及力学性能的影响。结果表明:由于混凝土废渣已发生水化反应,活性较低,且吸水性强,强度较低,故随着废渣替代率增大,再生混凝土坍落度减小,抗压强度降低,当废渣替代率为60%时,混凝土坍落度较未掺组减小了20.3%,7、28 d抗压强度分别较未掺组降低了25.6%、14.7%。建立了再生混凝土密度与抗压强度的关系式,综合考虑施工性能、力学性能及经济性,最终确定废渣替代率以30%为最佳。The article analyzes the composition of waste residue from a concrete mixing plant and explores the impact of different amounts of waste residue on the basic working properties and mechanical properties of recycled concrete.The experimental results show that due to the hydration reaction of concrete waste residue,its activity is low,its water absorption is strong,and its strength is poor.With the increase of waste residue content,the slump of recycled concrete reduces,and the compressive strength decreases slightly.When the substitution rate of waste residue is 60%,the slump of concrete decreases by 20.3%compared to the untreated group,and the compressive strength at 7 and 28 days decreases by 25.6%and 14.7%respectively compared to the untreated group.Further established the relationship between the density and compressive strength of recycled concrete,and ultimately obtained a 30%waste residue content as a more suitable alternative ratio,which can achieve a balance in construction performance,mechanical strength,and economy.

关 键 词：预拌混凝土 再生混凝土 固废利用 混凝土废渣 配合比设计 

分 类 号：TU528.041[建筑科学—建筑技术科学]