摘要
超细矿渣粉可以填充水泥基材料内部孔隙,改善其微观结构和宏观性能。采用微粉堆积密度测定仪法、Puntke饱和点用水量法、LCPC(法国路桥实验中心)最小需水量法、浆体相对密度法、标准稠度需水量比法5种试验方法定量分析了超细矿渣粉掺量对水泥-超细矿渣粉体系堆积密实度的影响,并将这5种试验方法测定的结果与Reschke理论计算值、Andreasen方程-灰色关联分析结果、Aim-Goff模型预测值进行了对比分析。结果表明,采用不同测试或分析方法得到的水泥-超细矿渣粉体系堆积密实度差异较大,但水泥-超细矿粉体系堆积密实度随超细矿渣粉掺量变化的趋势基本一致。浆体相对密度法和标准稠度需水量比法等方法,对胶凝材料体系堆积密实度的变化更为敏感,更适用于表征胶凝材料体系的堆积密实度。Aim-Goff模型预测结果与试验测试结果基本一致,且对堆积密实度的变化也较为敏感,建议采用Aim-Goff模型预测胶凝材料体系堆积密实度的变化规律。
Superfine slag powder can fill the porosity of cement-based materials and improve their microstructure and properties.The effect of superfine slag powder content on the bulk density of cement-superfine slag powder system was quantitatively analyzed by five test methods,including micro powder bulk density tester method,Puntke saturation point water consumption method,LCPC minimum water demand method,paste relative density method and water requirement ratio of standard consistency method.The test results of these five methods were compared with the Reschke theoretical values,the Andreasen equation-grey correlation analysis results and the Aim-Goff model predictive values.The results show that the bulk density values of cement-superfine slag powder system obtained by different tests or analysis methods are quite different.However,the tendency of the bulk density of cement-superfine slag system is basically the same as the content change of superfine slag powder.The paste relative density method and water requirement ratio of standard consistency are more sensitive to the change of bulk density of cementitious material system,which are more suitable for characterizing the bulk density of the cementitious material system.The predictive values of the Aim-Goff model are basically consistent with the test results,and the change of bulk density is more sensitive.It is suggested that the Aim-Goff model should be used to predict the change of the bulk density of the cementitious material system.
作者
黄法礼
王振
易忠来
程欢
温家馨
袁政成
靳昊
李化建
HUANG Fali;WANG Zhen;YI Zhonglai;CHENG Huan;WEN Jiaxin;YUAN Zhengcheng;JIN Hao;LI Huajian(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High Speed Railway,Beijing 100081,China)
出处
《硅酸盐通报》
CAS
北大核心
2021年第8期2647-2652,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(U1934206)
国家重点研发计划(2018YFC0705400)
中国铁道科学研究院基金(2018YJ057)。
关键词
超细矿渣粉
水泥颗粒
微粉堆积密度
饱和点用水量
最小需水量
浆体相对密度
标准稠度需水量比
superfine slag powder
cement particle
micro powder bulk density
water consumption at saturation point
minimum water demand
paste relative density
water requirement ratio of standard consistency
