气化渣配制混凝土的性能研究  

Research on the Preparation and Performance of Concrete Using Gasification Slag

作　　者：刘亚娟 楚京军 李茂辉 侯荣 常银会 闫玉智 马虎德 

机构地区：[1]宁夏赛马科进混凝土有限公司,宁夏回族自治区银川750011 [2]北方民族大学,宁夏回族自治区银川750021

出　　处：《混凝土世界》2024年第8期32-35,共4页China Concrete

基　　金：宁夏回族自治区重点研发计划项目“煤电与冶金多固废协同高效制备绿色高性能混凝土关键技术与规模化应用”(2022BDE02002)。

摘　　要：本文利用宁东能源化工基地的气化渣做骨料,配制气化渣混凝土并对其性能进行研究。结果表明:宁东气化渣具有含碳量低(2.1%)、颗粒级配合适(Ⅱ区中砂)、吸水率小(0.8%)、烧失量小(0.7%)、一定量的球形颗粒等较好的理化性能,为气化渣混凝土的配制奠定了基础;气化渣配制混凝土的最佳掺量为30%,当胶凝材料为水泥+高性能掺合料+矿粉时,混凝土的28 d抗压强度为66.4 MPa,碳化深度为0 mm,碳化等级为T-Ⅴ等级,当胶凝材料为水泥+高性能掺合料+粉煤灰时,混凝土的28 d抗压强度为56.5 MPa,碳化深度为1.4 mm。该气化渣混凝土为宁东气化渣的消纳提供了有效的解决途径,减少了资源消耗,降低了混凝土的生产成本。This article uses gasification slag from Ningdong Energy and Chemical Industry Base as aggregate to prepare gasification slag concrete and study its properties.The results show that Ningdong gasification slag has good physical and chemical properties,such as low carbon content(2.1%),suitable particle size distribution(medium sand in Zone II),low water absorption rate(0.8%),small burning vector(0.7%),and a certain amount of spherical particles,which lays the foundation for the preparation of gasification slag concrete.The optimal dosage for preparing concrete with gasification slag is 30%,when the cementitious material is cement+high-performance admixture+mineral powder,the 28 days compressive strength of the concrete is 66.4 MPa,the carbonation depth is 0 mm,and the carbonation grade is T-V;when the cementitious material is cement+high-performance admixture+f ly ash,the 28 days compressive strength of the concrete is 56.5 MPa,and the carbonation depth is 1.4 mm.The gasification slag concrete provides an effective solution for the consumption of Ningdong gasification slag,reducing resource consumption and lowering the production cost of concrete.

关 键 词：气化渣混凝土 抗压强度 抗碳化性能 

分 类 号：TU528[建筑科学—建筑技术科学]