中國作為全球最大的鋼渣生產國,每年鋼渣產量占全球鋼渣產量的55%以上。鋼渣這類工業(yè)副產品,通常磨細后可作為膠凝材料替代一部分水泥,在低碳建筑材料發(fā)展中具有非常重要的作用�？紤]以上因素,如何提高鋼渣作為水泥替代材料的利用率,是同時提高鋼材行業(yè)和混凝土行業(yè)可持續(xù)發(fā)展的重要課題。因此,本文系統(tǒng)深入研究了利用兩種高細度鋼渣（轉爐碳鋼熔渣CS和電弧爐不銹鋼渣SS）作為膠凝材料,對水泥基復合膠凝材料體系水化特性及膠凝性能的影響規(guī)律,并揭示了其復雜機理。本文首先測定了水泥-鋼渣砂漿的標準稠度、pH值、凝結時間以及不同鋼渣取代比例,對水泥基復合膠凝材料體系流動度的影響。其次,詳細對比了單摻CS、SS兩種鋼渣的水泥基復合膠凝材料體系的水化活性與水化反應特性的影響規(guī)律。兩種鋼渣等量取代水泥的質量分數(shù)為15%（CS15和SS15）和30%（CS30和SS30）。實驗結果表明:CS相比于SS表現(xiàn)出更高的堿度和pH值,以及更多具有水化反應活性的物相;兩種鋼渣由于其顆粒細度更高,均展現(xiàn)出一定程度的減水效果;CS顆粒加入水泥凈漿后,尤其在摻量較高時,會造成凈漿閃凝并縮短初凝時間;CS或SS摻量為50%的水泥凈漿的p... 

【文章來源】：東南大學江蘇省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：94 頁

【學位級別】：博士

【文章目錄】：
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



本文編號：3250310