碱激发粉煤灰-矿渣粉-硫铝酸盐水泥找平材料早期强度研究  

Study on the Early Compressive Strength of Alkali-Activated Fly Ash-Slag Powder-Sulphoaluminate Cement Leveling Material

作　　者：吴启坚 朱迎 黄永恒 李彩丝 WU Qijian;ZHU Ying;HUANG Yongheng;LI Caisi(Guangzhou Building Materials Industry Research Institute Co.,Ltd.;Guangdong High Performance Green Building Materials and Components Testing Technology and Application Engineering Technology Research Center.)

机构地区：[1]广州市建筑材料工业研究所有限公司 [2]广东省高性能绿色建筑材料及构配件检测技术与应用工程技术研究中心

出　　处：《广东建材》2024年第12期18-21,共4页Guangdong Building Materials

摘　　要：以复配后的偏硅酸钠和氢氧化钠为碱激发剂,通过改变粉煤灰、矿渣粉及硫铝酸盐水泥的配合比制备碱激发找平材料,研究水胶比、粉煤灰与矿渣粉掺量比值、硫铝酸盐掺量、激发剂掺量及模数对粉煤灰-矿渣粉-硫铝酸盐水泥三元胶凝体系早期强度的影响。研究结果表明,在水胶比0.35、粉煤灰与矿渣粉比值1、硫铝酸盐水泥掺量4.4%、激发剂掺量6.0%及模数1.2时,碱激发粉找平材料具有最佳的早期强度,其抗折、抗压强度分别为4.5MPa和35.8MPa,满足找平要求。Using a composite of sodium metasilicate and sodium hydroxide as an alkaline activator,an alkaline-activated leveling material was prepared by adjusting the mix proportions of fly ash,slag powder,and sulphoaluminate cement.The study investigates the impact of the water-binder ratio,the ratio of fly ash to slag powder,the sulphoaluminate content,the activator dosage,and the modulus on the early strength of the ternary cementitious system of fly ash-slag powder-sulphoaluminate cement.The research results indicate that,under the conditions of a water-binder ratio of 0.35,a fly ash-to-slag powder ratio of 1,a sulphoaluminate cement content of 4.4%,an activator dosage of 6.0%,and a modulus of 1.2,the alkaline-activated leveling material exhibits optimal early strength,with the flexural strength and the compressive strength of 4.5 MPa and 35.8 MPa,respectively,meeting the requirements for leveling applications.

关 键 词：碱激发 胶凝体系 找平材料 抗折强度 抗压强度 

分 类 号：TQ177[化学工程—硅酸盐工业]