养护方式对EMR-FA基地质聚合物抗压强度的影响  

Effect of Curing Methods on Compressive Strength of EMR-FA Based Gpolymer Materials

作　　者：孙朋 吕莹 李佳欣 马梦雨 李佳 Sun Peng;Lv Ying;Li Jiaxin;Ma Mengyu;Li Jia(School of Resource and Environment, South-Central University for Nationalities, Wuhan, Hubei 430074)

机构地区：[1]中南民族大学资源与环境学院,湖北武汉430074

出　　处：《非金属矿》2019年第3期20-23,54,共5页Non-Metallic Mines

基　　金：国家自然科学基金(51804354)

摘　　要：以电解锰渣(EMR)和粉煤灰(FA)为硅铝原料,在"氢氧化钠+水玻璃"激发剂作用下制备EMR-FA基地质聚合物。研究了高温养护(40、60、80、100℃)、湿法养护(25℃、湿度> 90%)和高温蒸汽养护(40、60、80、100℃)3种不同养护方式对材料抗压强度的影响。研究结果表明,随着养护温度和时间的增加,试块28 d养护龄期的抗压强度也随之增加。当温度和时间升高至一定水平后,材料28 d龄期的抗压强度并不会有明显的提高。在80℃高温环境下养护12 h,试块28 d龄期时的抗压强度达到最大,为15.0 MPa。对比3种养护方式,高温养护方式效果最佳,高温蒸汽养护方式次之,湿法养护的效果明显低于其余两种。In this study, electrolytic manganese residue (EMR) and fly ash (FA) were used as raw materials to prepare EMR-FA based geopolymer materials in an alkaline solution consisted of water, sodium hydroxide andsodium silicate.Different curing conditions, including high temperature curing, wet curing, high temperature wet curing were investigated. The results show that the compressive strength of the materialsin 28 daysrises with the increase of curing temperature and time. When the temperature and time rise to a certain level, the compressive strength of the material in 28 days will not increase significantly. After curing for 12 h at 80 ℃, the compressive strength of the materials reach the maximum of 15.0 MPa in 28 days. Compared with the three curing methods, the high temperature curing method has the best effect, and the high temperature wet curing method takes the second place. The wet curing effect is obviously lower than the others.

关 键 词：电解锰渣 地质聚合物 养护条件 抗压强度 

分 类 号：X756[环境科学与工程—环境工程]