本文選題：超膠凝 + 微研磨介質(zhì)��； 參考：《武漢理工大學(xué)》2014年博士論文

【摘要】：在普通硅酸鹽水泥基礎(chǔ)上，面向低水膠比、高流態(tài)的現(xiàn)代混凝土要求，建立水泥超膠凝化的低能耗、在線設(shè)計(jì)方法及技術(shù)體系。其目的是解決現(xiàn)代混凝土要求與通用技術(shù)存在的重大問(wèn)題：混凝土中存在20%~40%的未充分水化的水泥，其膠凝效率不能充分發(fā)揮；當(dāng)水膠比低于0.437時(shí)，不能完全水化的水泥熟料，僅作為骨料填充而造成巨大的浪費(fèi)；未水化的水泥會(huì)在混凝土的界面過(guò)渡區(qū)產(chǎn)生氫氧化鈣富集，導(dǎo)致混凝土耐久性惡化等。 基于上述問(wèn)題，本文提出了一種全新的面向混凝土應(yīng)用的水泥在線加工理論和技術(shù)。依托國(guó)家973重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃和國(guó)家自然科學(xué)基金（51178363）等項(xiàng)目，基于顆粒整形與精修、級(jí)配調(diào)控與優(yōu)化、表面改性與電荷平衡等技術(shù)，針對(duì)水泥的低碳制備、表面改性和膠凝效率的提升進(jìn)行系統(tǒng)研究。通過(guò)水泥進(jìn)行加工，提高水泥的膠凝效率，減少高資源、能源消耗和高碳排放的水泥熟料的用量，改善混凝土界面過(guò)渡區(qū)，提升混凝土耐久性。 本文主要成果和創(chuàng)新點(diǎn)如下： 1、基于粒度分布函數(shù)和分形理論，突破傳統(tǒng)粉磨效率低、能耗高的問(wèn)題，建立面向混凝土應(yīng)用的水泥低能耗在線加工制備技術(shù)。 突破粉磨效率低、大部分能耗轉(zhuǎn)化為熱量散失的傳統(tǒng)粉磨方式，創(chuàng)造性的提出采用微研磨介質(zhì)（M）對(duì)普通硅酸鹽水泥（C）進(jìn)行加工，，建立面向混凝土應(yīng)用的低能耗水泥超膠凝化系統(tǒng)理論和關(guān)鍵技術(shù)�；谡龖B(tài)、對(duì)數(shù)、高登-舒曼、羅遜-萊蒙勒分布函數(shù)和粒度分形維數(shù)理論，采用兩種粉磨方式，對(duì)三種物料體系（C、M和CM）的顆粒粒徑（頻度分布和累計(jì)分布）、特征參數(shù)（D50、D10、D25、D75和D90）和粒度分形維數(shù)D進(jìn)行系統(tǒng)研究，建立高效率、低能耗水泥超膠凝化的理論基礎(chǔ)。實(shí)驗(yàn)條件下，當(dāng)顆粒粒徑D50為8um時(shí)，與采用傳統(tǒng)粉磨技術(shù)處理普通水泥相比，添加5%的M處理10min和添加20%的M處理5min，單位質(zhì)量粉磨能耗分別降低29.83%和58.33%；當(dāng)顆粒粒徑D50為7um時(shí)，添加20%的M處理10min和添加30%的M處理5min，單位質(zhì)量粉磨能耗分別降低37.50%和64.29%。 2、基于IPP圖像技術(shù)、分形原理和電子層理論等理論，面向低水膠比、高流態(tài)混凝土要求，針對(duì)水泥顆粒粒徑減小，團(tuán)聚加劇的問(wèn)題，建立水泥超膠凝化表面改性和調(diào)控技術(shù)。 通過(guò)不同種類和摻量的表面改性劑等處理，對(duì)水泥漿體的絮凝結(jié)構(gòu)的分形維數(shù)、顆粒表面電位和流變性能進(jìn)行調(diào)控。實(shí)驗(yàn)條件下，超膠凝水泥漿體的分形維數(shù)1.2~1.4，水化60min的ζ電位-60mW~-30mW，，剪切速率為100r/s-1時(shí)，剪切應(yīng)力320pa~500pa，黏度4.00pa·s~5.00pa·s。而普通水泥的分形維數(shù)為1.4632，剪切速率為100r/s-1時(shí)，水化60min的ζ電位為-0.89mW，剪切應(yīng)力為579.27pa，黏度為9.45pa·s。超膠凝水泥分形維數(shù)減少，ζ電位電負(fù)性增加，剪切應(yīng)力減小，黏度降低，為其應(yīng)用于低水膠比、高流態(tài)、高強(qiáng)和高耐久性的現(xiàn)代混凝土奠定理論基礎(chǔ)。通過(guò)對(duì)超膠凝水泥表面改性和調(diào)控，建立水泥顆粒分形維數(shù)-ζ電位-流變性能模型，形成水泥分散技術(shù)與理論基礎(chǔ)，建立快速評(píng)價(jià)和分析顆粒分散程度的方法。 3、基于超膠凝水泥的水化產(chǎn)物、水化程度和界面過(guò)渡區(qū)特征，建立超膠凝水泥水化理論與模型，為超膠凝水泥應(yīng)用于高強(qiáng)和高耐久性的現(xiàn)代混凝土奠定理論基礎(chǔ)。 采用XRD、SEM和DTA-TG等手段，分析超膠凝水泥在不同齡期、不同水膠比的水化特征和水化程度，建立超膠凝水泥水化理論與模型。與普通水泥相比，同等實(shí)驗(yàn)條件下，超膠凝水泥在水化1d的水化程度明顯提高19.05%，水化3d的水化程度提高22.04%，水化180d的水化程度提高達(dá)20%以上。超膠凝水泥水化產(chǎn)物結(jié)構(gòu)更加致密，水化產(chǎn)物中Ca(OH)2的特征衍射峰峰值強(qiáng)度增加，水化產(chǎn)物的失重量明顯增多。與普通水泥相比，實(shí)驗(yàn)條件下超膠凝水泥的界面過(guò)渡區(qū)的硬度提高20.95%，尺寸減小24.14%，漿體的硬度提高14.29%，水化產(chǎn)物結(jié)構(gòu)更致密，Ca(OH)2富集現(xiàn)象減少，為其應(yīng)用于混凝土提高強(qiáng)度和耐久性奠定理論基礎(chǔ)。 4、研究超膠凝水泥的在不同體系的混凝土的應(yīng)用效果，建立面向混凝土的系統(tǒng)體系和關(guān)鍵技術(shù)，奠定超膠凝水泥應(yīng)用和推廣的理論基礎(chǔ)。 研究超膠凝水泥的在不同體系的混凝土的應(yīng)用效果，建立面向混凝土應(yīng)用的系統(tǒng)體系和關(guān)鍵技術(shù)。力學(xué)性能相當(dāng)?shù)那闆r下，單位體積混凝土中，采用超膠凝水泥和礦粉取代普通水泥，超膠凝水泥摻量為8.33%，水泥用量減少30.00%；采用超膠凝水泥和粉煤灰取代普通水泥，超膠凝水泥摻量為16.67%，水泥用量減少25.00%；采用超膠凝水泥、粉煤灰和礦粉取代普通水泥，超膠凝水泥摻量為8.33%，水泥用量減少30.00%。研究并分析超膠凝水泥的工業(yè)化應(yīng)用的物料流平衡，并繪制工業(yè)化應(yīng)用流程圖，奠定超膠凝水泥應(yīng)用和推廣的理論基礎(chǔ)和關(guān)鍵技術(shù)。
[Abstract]:On the basis of ordinary portland cement, the modern concrete requirements for low water glue ratio and high flow state are required to establish low energy consumption, on-line design method and technical system for cement super gel condensation. The purpose is to solve the major problems existing in modern concrete requirements and general technology: concrete in concrete with insufficient hydration of 20%~40%, and its gelation The efficiency can not be fully utilized; when the water to glue ratio is less than 0.437, the cement clinker that can not be completely hydrated is a huge waste only as the aggregate filling; the unhydrated cement will lead to the enrichment of calcium hydroxide in the transition zone of the concrete interface, which leads to the deterioration of the durability of concrete.
Based on the above problems, this paper puts forward a new theory and technology of cement on-line processing for concrete applications. Relying on the national 973 key basic research development planning and National Natural Science Foundation (51178363), and other projects, such as particle shaping and refinement, grading regulation and optimization, surface modification and charge balance, and so on, for cement The low carbon preparation, surface modification and cementitious efficiency are systematically studied. Through the processing of cement, the cementitious efficiency of cement is improved, the amount of high resources, energy consumption and high carbon cement clinker are reduced, the transition zone of concrete interface is improved and the durability of concrete is improved.
The main achievements and innovation points in this paper are as follows:
1, based on the particle distribution function and fractal theory, the problem that the traditional grinding efficiency is low and the energy consumption is high, the low energy consumption on-line processing technology of cement for concrete application is established.
To break through the traditional grinding method with low grinding efficiency and most energy consumption converted to heat loss, it is creatively proposed that micro grinding medium (M) is used to process ordinary portland cement (C), and the theory and key technology of low energy cement super gelation system for concrete application are established. Based on normal, logarithmic, Gordon Schuhmann, Roxon lrinler The distribution function and fractal dimension theory are used to systematically study the particle size (frequency distribution and cumulative distribution) of the three material systems (C, M and CM), characteristic parameters (D50, D10, D25, D75 and D90) and the fractal dimension D, and establish the theoretical basis for high efficiency and low energy cement super gel condensation. When the particle size D50 is 8um, the energy consumption per unit mass grinding is reduced by 29.83% and 58.33%, respectively, by adding 5% M treatment 10min and adding 20% M treatment 5min by traditional grinding technology. When particle size D50 is 7um, 20% M treatment 10min and 30% M processing 5min are added, and the energy consumption per unit mass grinding is reduced 37.50%, respectively. And 64.29%.
2, based on the IPP image technology, the fractal theory and the theory of the electronic layer theory, facing the low water glue ratio and high flow state concrete requirements, the surface modification and regulation technology of cement super gel agglomerate are established to reduce the particle size and agglomeration of cement.
The fractal dimension of the flocculation structure of cement paste, the surface potential and the rheological properties of the cement paste are regulated by different kinds of surface modifiers and other additives. Under the experimental conditions, the fractal dimension 1.2~1.4 of the cementitious cement paste, the zeta potential -60mW~-30mW of the hydrated 60min, and the shear rate of 100r/s-1, the shear stress 320pa~500pa, and the viscosity 4 The fractal dimension of.00pa s~5.00pa S. and ordinary cement is 1.4632. When the shear rate is 100r/s-1, the zeta potential of the hydrated 60min is -0.89mW, the shear stress is 579.27pa, the viscosity is 9.45pa. S. super gel cement fractal dimension decreases, the zeta potential electronegativity increases, the shear stress decreases, and the viscosity decreases, which is applied to low water gel ratio, high flow state, high strength and high strength. The modern concrete with high durability has laid a theoretical foundation. Through the modification and regulation of the surface of super gel cement, the fractal dimension of cement particles, zeta potential and rheology model is established, and the cement dispersion technology and theoretical foundation are formed, and the method of rapid evaluation and analysis of the degree of particle dispersion is established.
3, based on the hydration products of the cementitious cement, the hydration degree and the characteristics of the interface transition zone, the theory and model of the hydration of super gelatinization cement are established, which lays a theoretical foundation for the application of super gelation cement to the modern concrete with high strength and high durability.
By means of XRD, SEM and DTA-TG, the hydration characteristics and hydration degree of super gel cement at different age and water glue ratio are analyzed. The hydration theory and model of super gel cement cement are established. Compared with ordinary cement, under the same experimental conditions, the hydration degree of super cementitious cement in hydrated 1D is obviously increased by 19.05%, and the hydration degree of hydrated 3D is increased by 22.04%, The hydration degree of hydrated 180d is increased by more than 20%. The structure of hydration products of super gel cement is more compact, the peak intensity of diffraction peak of Ca (OH) 2 in hydration products increases, and the weight loss of hydration products increases obviously. Compared with ordinary cement, the hardness of the boundary surface transition zone of super cementitious cement increases by 20.95% and the size decreases by 24.14%, compared with ordinary cement. The hardness of the slurry increased by 14.29%, the structure of hydrated product was denser, and the enrichment of Ca (OH) 2 decreased, which laid a theoretical foundation for its application in concrete to improve its strength and durability.
4, the application effect of super gel cement in different systems of concrete is studied, and the system system and key technology for concrete are set up, and the theoretical foundation of the application and popularization of super gel cement and cement is laid.
The application effect of super gelation cement in different systems of concrete is studied, and the system system and key technology for concrete application are established. Under the condition of equivalent mechanical properties, super cementitious cement and mineral powder are used in the unit volume concrete to replace the ordinary cement, the amount of super gelation cement is 8.33%, the cement dosage is reduced by 30%, and the super glue is used. Cement and fly ash replace ordinary cement, super cementitious cement content is 16.67%, cement consumption is reduced by 25%, super gel cement, fly ash and mineral powder replace ordinary cement, super cementitious cement content is 8.33%, cement dosage reduced 30.00%. research and analysis of industrial application of super gel cement for material flow balance, and draw industrialization The flow chart is used to lay the theoretical foundation and key technology for the application and promotion of super cementitious cement.

【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TQ172.1

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