摘要
采用氯盐类、硫酸盐类、碱类以及醇胺类外加剂,探究不同种类化学激发剂对循环流化床(CFB)粉煤灰水泥的活化效果及力学性能的影响规律。结果表明:无机类外加剂均可激发CFB粉煤灰水泥活性。综合来看,激发效果由强至弱依次为氯盐类>硫酸盐类>碱类;醇胺类激发剂掺量较少,且有很好的活性激发效果;尤其对后期强度有着显著的提高;其中DEIPA最佳掺量为0.01%,3 d抗压强度相比空白样提升2.4 MPa;28 d强度提高7 MPa,达到最高值47.5 MPa。
The activation effect and mechanical properties of different chemical activators on circulating fluidized bed fly ash were investigated,such as chlorides,sulfates,alkalis and alcohol amines.The results showed that:inorganic activator all can stimulate the activity of CFB fly ash blended cement,their activation effect can be sorted as follows:chloride salts>sulfates>alkalis.A bit of alcohol amine activator can have a good effect on stimulating the activity of CFB fly ash,especially long-time strength.The optimum dosage of DEIPA was0.01%,the strength of3d was2.4MPa higher than that of blank,and the compressive strength of28d increased7MPa,reaching the highest value of47.5MPa.
作者
李端乐
王栋民
郑大鹏
任才富
LI Duan-le;WANG Dong-min;ZHENG Da-peng;REN Cai-fu(School of Chemical and Environment Engineering, China University of Mining and Technology (Beijing), Beijing 10083, P.R.China)
出处
《科学技术与工程》
北大核心
2017年第29期120-127,共8页
Science Technology and Engineering
基金
山西省煤基重点科技攻关项目(MC2014-04)资助
关键词
化学激发剂
循环流化床粉煤灰
水泥
力学性能
chemical activator
circulating fluidized bed fly ash
cement
mechanical properties
