Influence of Ultra Fine Glass Powder on the Properties and Microstructure of Mortars  

作　　者：Wei Chen Dingdan Liu Yue Liang 

机构地区：[1]School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan,430068,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第5期915-938,共24页流体力学与材料加工（英文）

基　　金：the National Natural Science Foundation of China(No.51709097).

摘　　要：This study focuses on the effect of ultrafine waste glass powder on cement strength,gas permeability and pore structure.Varying contents were considered,with particle sizes ranging from 2 to 20μm.Moreover,alkali activation was considered to ameliorate the reactivity and cementitious properties,which were assessed by using scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS),and specific surface area pore size distribution analysis.According to the results,without the addition of alkali activators,the performance of glass powder mortar decreases as the amount of glass powder increases,affecting various aspects such as strength and resistance to gas permeability.Only 5%glass powder mortar demonstrated a compressive strength at 60 days higher than that of the control group.However,adding alkali activator(CaO)during hydration ameliorated the hydration environment,increased the alkalinity of the composite system,activated the reactivity of glass powder,and enhanced the interaction of glass powder and pozzolanic reaction.In general,compared to ordinary cement mortar,alkali-activated glass powder mortar produces more hydration products,showcases elevated density,and exhibits improved gas resistance.Furthermore,alkali-activated glass powder mortar demonstrates an improvement in performance across various aspects as the content increases.At a substitution rate of 15%,the glass powder mortar reaches its optimal levels of strength and resistance to gas permeability,with a compressive strength increase ranging from 28.4%to 34%,and a gas permeation rate reduction between 51.8%and 66.7%.

关 键 词：MORTAR waste glass powder alkali activation compressive strength gas permeability pore structure 

分 类 号：TB30[一般工业技术—材料科学与工程]