固体NaOH/Na2SiO3激发矿粉/粉煤灰-炉渣基注浆材料性能研究

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中文摘要：以矿粉和粉煤灰-炉渣作为前驱体,其中粉煤灰、炉渣以质量比4꞉1共同粉磨制备前驱体之一,以NaOH和Na2SiO3配制模数为1.2的固体激发剂,制备碱激发注浆材料.研究粉煤灰-炉渣的掺量、激发剂的掺量(以Na2O计)对注浆材料工作性能和力学性能的影响,并通过扫描电镜(SEM)和能谱分析(EDS)对水化产物进行物理化学表征,使用核磁共振分析注浆材料孔结构特征.研究结果表明:粉煤灰-炉渣掺量为50%的注浆材料的28 d最大抗压强度达31.25 MPa.水化产物主要为C-A-S-H凝胶,浆液结石体内部孔隙主要为胶凝孔(孔径<10 nm)和过渡孔(孔径为[10～100)nm),占比超过90%.

外文标题：Study on properties of solid NaOH/Na2SiO3 activated slag/fly ash-bottom ash based grouting material

外文摘要：The slag and fly ash-bottom ash were used as precursors.The fly ash and bottom ash were co-ground to prepare one of the precursors.The solid activator with a modulus of 1.2 was prepared by NaOH and Na2SiO3,and the alkali-activated grouting material was prepared.The effects of fly ash-bottom ash content and activator content(Na2O)on the working performance and mechanical properties of grouting materials were studied.The hydration products were characterized by scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).The pore structure characteristics of grouting materials were analyzed by nuclear magnetic resonance(NMR).The results show that the 28 d maximum compressive strength of grouting material with 50% fly ash-bottom ash content is 31.25 MPa.The hydration products are mainly C-A-S-H gel.The internal pores of the slurry stone body are mainly gel pores(<10 nm)and transition pores([10-100)nm),accounting for more than 90% .

外文关键词：

bottom ashfly ashsolid activatoralkali-activated grouting materialmechanical propertiesmicrostructure

作者：

徐先杰、朱志敬、王孟、白继文、陈孟军、刘人太

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作者单位：

山东大学岩土与结构工程研究中心,山东济南,250061

关键词：

炉渣粉煤灰固体激发剂碱激发注浆材料力学性能微观结构

基金：

云南省重大科技创新工程项目国家自然科学基金创新研究群体项目国家自然科学基金联合基金资助项目国家重点研发计划项目山东省重大科技创新工程项目

项目编号：

202103AA08001652021005U19062292021YFB26008002020CXGC011403

出版年：

2024

DOI：

10.11817/j.issn.1672-7207.2024.02.016

中南大学学报(自然科学版)

中南大学

中南大学学报(自然科学版)

CSTPCD北大核心

影响因子：0.938

ISSN：1672-7207

年,卷(期)：2024.55(2)

参考文献量23