碳钢熔渣与不锈钢渣对水泥基复合胶凝材料水化活性及胶凝特性的影响及机理
发布时间：2021-06-26 01:02
中国作为全球最大的钢渣生产国,每年钢渣产量占全球钢渣产量的55%以上。钢渣这类工业副产品,通常磨细后可作为胶凝材料替代一部分水泥,在低碳建筑材料发展中具有非常重要的作用。考虑以上因素,如何提高钢渣作为水泥替代材料的利用率,是同时提高钢材行业和混凝土行业可持续发展的重要课题。因此,本文系统深入研究了利用两种高细度钢渣（转炉碳钢熔渣CS和电弧炉不锈钢渣SS）作为胶凝材料,对水泥基复合胶凝材料体系水化特性及胶凝性能的影响规律,并揭示了其复杂机理。本文首先测定了水泥-钢渣砂浆的标准稠度、pH值、凝结时间以及不同钢渣取代比例,对水泥基复合胶凝材料体系流动度的影响。其次,详细对比了单掺CS、SS两种钢渣的水泥基复合胶凝材料体系的水化活性与水化反应特性的影响规律。两种钢渣等量取代水泥的质量分数为15%（CS15和SS15）和30%（CS30和SS30）。实验结果表明:CS相比于SS表现出更高的碱度和pH值,以及更多具有水化反应活性的物相;两种钢渣由于其颗粒细度更高,均展现出一定程度的减水效果;CS颗粒加入水泥净浆后,尤其在掺量较高时,会造成净浆闪凝并缩短初凝时间;CS或SS掺量为50%的水泥净浆的p...
【文章来源】：东南大学江苏省 211工程院校 985工程院校 教育部直属院校
【文章页数】：94 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter1.INTRODUCTION
1.1 Background
1.2 Literature review and comments
1.2.1 Literature review
1.2.1.1 Overview of slag generation from the steel making process
1.2.1.2 Effect of treatment method on the cementitious properties of steel slag
1.2.1.3 Effect of fineness on the reactivity of steel slag
1.2.1.4 Effect of mechanical activation on the reactivity of steel slag
1.2.1.5 Steel slag as a binder with another supplementary cementing materials
1.2.2 Comments
1.3 Research objection and scopes
1.4 Outline of thesis
CHAPTER2.RAW MATERIALS,EXPERIMENTAL PROGRAM
2.1 Raw materials
2.2 Experimental program
2.2.1 Mix proportion and sample preparation
2.2.2 Workability test
2.2.3 The composition of the slag
2.2.4 Hydration heat and thermal analysis
2.2.5 Fourier transform-infrared spectra
2.2.6 The pore size distribution
2.2.7 Microstructure morphology
2.2.8 Strength test machine
CHAPTER3.THE CHARACTERISTICS AND HYDRATION PROPERTIES OF STEEL SLAG AND STAINLESS SLAG
3.1 Physical characteristics of slags
3.2 The composition of slags
3.3 Particle size distribution(PSD)of slags
3.4 Particles morphology of slags
3.5 Mineralogy of slags
3.6 Standard consistence of slag
3.7 Setting time of CS and SS slags
3.8 Setting time for slag-cement binder
3.9 The pH values for hydrated pastes
3.10 Effect of CS and SS on mortar fluidity
3.11 Chapter summery
CHAPTER4.THE HYDRAULIC PROPERTIES AND CEMENTITIOUS ACTIVITY OF PURE CARBON STEEL SLAG AND PURE STAINLESS STEEL SLAG
4.1 Hydration heats of cement and slags
4.2 Hydration process of slags
4.3 Hydration products of the hydrated slags by XRD analysis
4.4 Hydration products of the hydrated slags by FTIR analysis
4.5 Pore structure
4.6 Microstructure morphology of the hardened slag pastes
4.7 Micro-chemical analysis on the hardened slag pastes
4.8 Compressive strength of slag mortars
4.9 Chapter summery
CHAPTER5.COMPARISON OF HYDRATION PROPERTOES OF CEMENT-SLAG BLENDEDBINDERS
5.1 Hydration heat
5.2 Hydration products
5.3 Hydration process of cement-slag binders
5.4 Ca(OH)_2 content
5.5 The strength
5.6 Microstructure characteristics of cement- slag mix by Scanning electron microscope (SEM)
5.7 Microstructure characteristics of cement- slag mix by Back scattered electron (BSE)
5.8 Chapter summery
CHAPTER6.CONCLUTIONS AND PROSPECTS
6.1 Main conclusions
6.2 Innovation
6.3 Prospects
REFERENCES
ACHIEVEMENTS
ACKNOWLEDGEMENTS
本文编号：3250310
【文章来源】：东南大学江苏省 211工程院校 985工程院校 教育部直属院校
【文章页数】：94 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter1.INTRODUCTION
1.1 Background
1.2 Literature review and comments
1.2.1 Literature review
1.2.1.1 Overview of slag generation from the steel making process
1.2.1.2 Effect of treatment method on the cementitious properties of steel slag
1.2.1.3 Effect of fineness on the reactivity of steel slag
1.2.1.4 Effect of mechanical activation on the reactivity of steel slag
1.2.1.5 Steel slag as a binder with another supplementary cementing materials
1.2.2 Comments
1.3 Research objection and scopes
1.4 Outline of thesis
CHAPTER2.RAW MATERIALS,EXPERIMENTAL PROGRAM
2.1 Raw materials
2.2 Experimental program
2.2.1 Mix proportion and sample preparation
2.2.2 Workability test
2.2.3 The composition of the slag
2.2.4 Hydration heat and thermal analysis
2.2.5 Fourier transform-infrared spectra
2.2.6 The pore size distribution
2.2.7 Microstructure morphology
2.2.8 Strength test machine
CHAPTER3.THE CHARACTERISTICS AND HYDRATION PROPERTIES OF STEEL SLAG AND STAINLESS SLAG
3.1 Physical characteristics of slags
3.2 The composition of slags
3.3 Particle size distribution(PSD)of slags
3.4 Particles morphology of slags
3.5 Mineralogy of slags
3.6 Standard consistence of slag
3.7 Setting time of CS and SS slags
3.8 Setting time for slag-cement binder
3.9 The pH values for hydrated pastes
3.10 Effect of CS and SS on mortar fluidity
3.11 Chapter summery
CHAPTER4.THE HYDRAULIC PROPERTIES AND CEMENTITIOUS ACTIVITY OF PURE CARBON STEEL SLAG AND PURE STAINLESS STEEL SLAG
4.1 Hydration heats of cement and slags
4.2 Hydration process of slags
4.3 Hydration products of the hydrated slags by XRD analysis
4.4 Hydration products of the hydrated slags by FTIR analysis
4.5 Pore structure
4.6 Microstructure morphology of the hardened slag pastes
4.7 Micro-chemical analysis on the hardened slag pastes
4.8 Compressive strength of slag mortars
4.9 Chapter summery
CHAPTER5.COMPARISON OF HYDRATION PROPERTOES OF CEMENT-SLAG BLENDEDBINDERS
5.1 Hydration heat
5.2 Hydration products
5.3 Hydration process of cement-slag binders
5.4 Ca(OH)_2 content
5.5 The strength
5.6 Microstructure characteristics of cement- slag mix by Scanning electron microscope (SEM)
5.7 Microstructure characteristics of cement- slag mix by Back scattered electron (BSE)
5.8 Chapter summery
CHAPTER6.CONCLUTIONS AND PROSPECTS
6.1 Main conclusions
6.2 Innovation
6.3 Prospects
REFERENCES
ACHIEVEMENTS
ACKNOWLEDGEMENTS
本文编号：3250310
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