硅酸盐通报2017，Vol.36Issue(12)：3958-3963,6.
废砖粉改性MgO膨胀剂及其对砂浆性能的影响
Modification of MgO Expansive Agent by Waste Brick Powder and Its Effect on Performance of Mortars
摘要
Abstract
MgO expansive agent ( MEA) was modified with dolomite and waste brick powder at different calcination systems ( The main products arepericlase and belite , which is referred to as PB ) .The effect of PB on deformation and strengths of mortars was studied .Results show that calcination systems has no influence on MgO content in 950-1050 ℃, but increasing calcination temperature or extending holding time may reduce the content of f-CaO and quartz in PB .The expansion of mortars containing PB increases with increasing of the content of PB or curing age .The mortars containing PB produced at higher temperature for longer residence time expands at a relatively lower rate before 60 d.The compressive strength of mortars with PB decreases with increase of the content of PB .The reduction percentage of compressive strength of mortars decreases with extending curing age . The reduction percentage of compressive strength of mortars containing 20 wt％PB is less than 10％in 28 d.The mortars containing PB calcined at 950 ℃for 1 h have the greatest expansion and the minimal reduction in strengths before 60 d.关键词
改性/MgO膨胀剂/砂浆/膨胀性能/强度Key words
modification/MgO expansive agent/mortar/expansion/strength分类
建筑与水利引用本文复制引用
唐族娟,邓敏,莫立武,吕利明,刘光辉..废砖粉改性MgO膨胀剂及其对砂浆性能的影响[J].硅酸盐通报,2017,36(12):3958-3963,6.基金项目
国家自然科学基金重点项目(51461135003) （51461135003）
国家科技支撑计划课题(2011BAE27B01) （2011BAE27B01）
国家重点研发计划(2016YFB0303601) （2016YFB0303601）
