摘要
本文探究了花生壳灰(GSA)、草木灰(PA)、宿州生物质灰(SZA)、玉米秸秆灰(CSA)四种不同生物质灰分别替代10%(质量分数)高炉矿渣粉(GGBS)对碱激发矿渣(AAS)胶凝材料流动度、凝结时间、水化性能、收缩性能及抗压强度的影响规律。结果表明,生物质灰的掺入能提高碱激发溶液的pH值,对AAS的水化过程有不同程度的促进作用,掺入GSA、PA、SZA和CSA后AAS试样的浆体累积放热量较空白组分别增长了31.2%、27.1%、16.9%、19.5%,实验室制灰(GSA和PA)累积放热量高于电厂制灰(SZA和CSA)。实验室制灰(GSA和PA)的掺入提高了净浆试样的自收缩,较空白组分别增加了61.5%、44.9%,而SZA和CSA的掺入一定程度上缓解了自收缩现象,较空白组分别减少了15.0%、15.7%。掺入生物质灰对AAS试样的抗压强度有改善效果,掺入GSA、PA、SZA、CSA后AAS试样28 d抗压强度较空白组分别提高了20.0%、18.3%、15.9%、16.9%。
In this paper,the effects of groundnut shell ash(GSA),plant ash(PA),Suzhou biomass ash(SZA)and corn stover ash(CSA)on the fluidity,setting time,hydration properties,shrinkage properties and compressive strength of alkali-activated slag(AAS)cementitious materials were investigated when 10%(mass fraction)blast furnace slag powder(GGBS)was replaced by four different ashes.The results show that the incorporation of biomass ash can increase the pH value of alkali-activated solution and promote the hydration process of AAS to varying degrees.After the incorporation of GSA,PA,SZA and CSA,the cumulative heat release of AAS specimens increases by 31.2%,27.1%,16.9%and 19.5%,respectively,compared with the blank group.The laboratory ash(GSA and PA)cumulative heat release is higher than the power plant ash(SZA and CSA).The incorporation of laboratory ash(GSA and PA)increases the autogenous shrinkage of paste specimens,which increases by 61.5%and 44.9%,respectively,compared with the blank group.The incorporation of SZA and CSA alleviates the autogenous shrinkage to a certain extent,which decreases by 15.0%and 15.7%,respectively,compared with the blank group.The compressive strength of AAS specimens is improved by adding biomass ash.The 28 d compressive strength of AAS specimens after adding GSA,PA,SZA and CSA is 20.0%,18.3%,15.9%and 16.9%higher than that of the blank group,respectively.
作者
吕阳
葛云露
赵博宇
陈扬
但建明
周阳
柯凯
李相国
LYU Yang;GE Yunlu;ZHAO Boyu;CHEN Yang;DAN Jianming;ZHOU Yang;KE Kai;LI Xiangguo(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory Incubation Base for Green Processing of Chemical Engineering,Shihezi University,Shihezi 832000,China;School of Materials and Chemical Engineering,Hubei University of Technology,Wuhan 430068,China)
出处
《硅酸盐通报》
北大核心
2025年第4期1288-1296,共9页
Bulletin of the Chinese Ceramic Society
基金
兵团重点科技攻关计划(2023AB013-03)
八师石河子市科技计划项目(2022GY01)。
关键词
碱激发矿渣
生物质灰
抗压强度
收缩性能
水化性能
alkali-activated slag
biomass ash
compressive strength
shrinkage property
hydration property
