常用礦物摻合料對水泥基材料的性能影響研究
發(fā)布時間：2019-06-22 14:53
【摘要】：現(xiàn)如今,建筑行業(yè)已經(jīng)成為我國國民經(jīng)濟發(fā)展的重要物質(zhì)生產(chǎn)部門,它不僅與國家整體經(jīng)濟的發(fā)展息息相關(guān),也和人民生活質(zhì)量的改善有著密不可分的聯(lián)系。在建筑行業(yè)領(lǐng)域中,水泥作為基本建設(shè)的主要原材料之一,具有極其突出的地位。由于它具有水化、凝結(jié)硬化快,強度高等特點而廣泛應用于工業(yè)、國防、交通、水利等許多重要國家支柱產(chǎn)業(yè)。與此同時由于水泥在生產(chǎn)過程中帶來的嚴重環(huán)境問題也成為阻礙經(jīng)濟發(fā)展的重要因素之一。另一方面,隨著社會工業(yè)化的快速發(fā)展,產(chǎn)生了許多無法被環(huán)境所消化的工業(yè)廢棄物,如粉煤灰、礦渣、硅灰、煤矸石等。這些工業(yè)廢棄物由于技術(shù)、經(jīng)濟等問題無法被合理利用,造成不合理堆放,不僅占用大量土地,還嚴重污染環(huán)境。因此,如何通過合理的設(shè)計,把這些工業(yè)廢棄物以礦物摻合料或水泥混合材的形式與水泥熟料有效的進行結(jié)合已成為各國學者亟待解決的問題。這樣不僅可以減少水泥熟料的使用,減少水泥生產(chǎn)過程的環(huán)境污染問題,還可以把大量的工業(yè)廢棄物有效地利用起來,走出一條可持續(xù)發(fā)展的道路。本文從膠凝材料的水化反應程度出發(fā),通過對復合水泥漿體中膠凝材料的水化反應程度進行定性及定量測量,評定復合體系中礦物摻合料對體系所做的貢獻。研究膠凝材料水化反應程度在不同配合比,不同養(yǎng)護齡期條件下的變化規(guī)律,并結(jié)合復合水泥漿體的干燥收縮率和抗壓強度數(shù)據(jù),尋找復合體系中各膠凝材料的最佳配比。本文分為三部分對礦物摻合料對體系所做的貢獻進行研究,1)利用化學結(jié)合水法、選擇性溶解法及計算機手段定性及定量的測量了水泥、粉煤灰-水泥二元體系、粉煤灰-硅灰-水泥三元體系中水泥和礦物摻合料的水化反應程度,并結(jié)合干燥收縮率和抗壓強度的測量分析了養(yǎng)護齡期、配合比對化學結(jié)合水量、水化反應程度、干燥收縮、抗壓強度的影響規(guī)律以及各性能之間的關(guān)系,尋找復合體系中各膠凝材料的最佳配比;2)利用化學結(jié)合水法、選擇性溶解法及計算機手段定性及定量的測量了水泥、煤矸石-水泥二元體系、礦渣-水泥二元體系、煤矸石-礦渣-水泥三元體系中水泥、煤矸石、礦渣的水化反應程度,并結(jié)合干燥收縮率和抗壓強度的測量分析了養(yǎng)護齡期、配合比對化學結(jié)合水量、水化反應程度、干燥收縮、抗壓強度的影響規(guī)律以及各性能之間的關(guān)系,尋找復合體系中各膠凝材料的最佳配比;3)通過熱分析的方法測量了水泥、粉煤灰-水泥二元體系、粉煤灰-硅灰-水泥三元體系中Ca(OH)2含量,以定性表征復合體系中膠凝材料的水化反應程度,并結(jié)合干燥收縮率和抗壓強度數(shù)據(jù),分析養(yǎng)護齡期、配合比對體系中Ca(OH)2含量、干燥收縮、抗壓強度的影響規(guī)律以及各性能之間的關(guān)系,找尋最合理的配比。得出如下結(jié)論:1)綜合考慮粉煤灰-水泥二元體系,粉煤灰-硅灰-水泥三元體系中水泥、礦物摻合料的水化反應程度,復合水泥基材料的干燥收縮率及抗壓強度值,認為當復合水泥漿體中含有45%粉煤灰,5%硅灰時,復合材料的干燥收縮率較小,抗壓強度較大,并且礦物摻合料的利用率最高。2)綜合考慮煤矸石-水泥、礦渣-水泥二元體系,煤矸石-礦渣-水泥三元體系中水泥、煤矸石、礦渣的水化反應程度,復合水泥基材料的干燥收縮率以及抗壓強度值,認為當復合水泥漿體中含有15%煤矸石,15%礦渣時,復合材料的干燥收縮率較小,抗壓強度較大,并且煤矸石和礦渣的利用率最高。3)綜合考慮粉煤灰-水泥二元體系、粉煤灰-硅灰-水泥三元體系中的Ca(OH)2含量,復合水泥基材料的干燥收縮率以及抗壓強度值,認為當復合水泥漿體中含有30%粉煤灰,10%硅灰時,復合材料的干燥收縮率較小,抗壓強度較大。
[Abstract]:Now, the construction industry has become an important material production department of the national economic development of our country, it is closely related not only to the development of the whole country economy, but also to the improvement of the quality of the people's life. In the construction industry, cement is one of the main raw materials of the capital construction, and has an outstanding position. It is widely used in many important national pillar industries such as industry, national defense, transportation and water conservancy because it has the characteristics of hydration, condensation and hardening, high strength and so on. At the same time, the serious environmental problems caused by the cement in the production process also become one of the important factors that hinder the economic development. On the other hand, with the rapid development of the social industrialization, many industrial wastes that cannot be digested by the environment, such as fly ash, slag, silica fume, coal and stone, etc. are produced. The industrial wastes cannot be reasonably utilized due to the problems of technology, economy and the like, thus not only occupying a large amount of land, but also seriously polluting the environment. Therefore, how to effectively combine these industrial wastes with cement clinker in the form of mineral admixture or cement admixture has become a problem to be solved by national scholars through reasonable design. So that the use of the cement clinker can be reduced, the environmental pollution of the cement production process is reduced, and a large amount of industrial wastes can be effectively utilized to walk out of a sustainable development road. In this paper, from the degree of hydration reaction of the gelled material, the contribution of the mineral admixture in the composite system to the system is assessed by the qualitative and quantitative measurement of the degree of hydration reaction of the cementing material in the composite cement paste. The change law of the degree of hydration reaction of the gelled material under the conditions of different compounding ratio and different curing age is studied, and the optimum ratio of each cementing material in the composite system is found by combining the drying shrinkage and the compressive strength data of the composite cement paste. This paper is divided into three parts to study the contribution of mineral admixture to the system.1) The binary system of cement and fly ash-cement is measured by chemical combination water method, selective dissolution method and computer means. the hydration reaction degree of the cement and the mineral admixture in the fly ash-silica fume-cement ternary system is analyzed, the curing age is analyzed in combination with the measurement of the drying shrinkage and the compressive strength, the influence rule of the compressive strength and the relationship between the performances are used to find the optimal proportion of each cementing material in the composite system;2) the binary system of the cement and the coal-fired stone-cement is measured qualitatively and quantitatively by the chemical combination water method, the selective dissolution method and the computer means, The hydration reaction degree of cement, coal, stone and slag in the slag-cement binary system, the coal-fired stone-slag-cement ternary system is analyzed, the curing age is analyzed by combining the measurement of the drying shrinkage and the compressive strength, the influence rule of the compressive strength and the relationship between the performances are used to find the optimal ratio of each cementing material in the composite system; and 3) the content of the Ca (OH)2 in the cement, the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system is measured by the method of thermal analysis, In this paper, the hydration degree of the gelled material in the composite system was qualitatively characterized, and the drying shrinkage and the compressive strength data were combined to analyze the effect of the curing age and the matching ratio on the content of Ca (OH)2, the dry shrinkage and the compressive strength of the system, and the relationship between the properties. The following conclusions are drawn:1) comprehensively considering the hydration reaction degree of cement and mineral admixture in the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material, It is considered that when the composite cement paste contains 45% of fly ash and 5% silica fume, the drying shrinkage of the composite material is small, the compressive strength is large, and the utilization ratio of the mineral admixture is the most. The hydration degree of the cement, the coal-fired stone and the slag in the coal-fired stone-slag-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material are considered to be small when the composite cement paste contains 15% of the coal and 15% of the slag, and 3) comprehensively considering the Ca (OH)2 content in the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material, It is considered that when the composite cement paste contains 30% fly ash and 10% silica fume, the drying shrinkage of the composite material is small and the compressive strength is large.
【學位授予單位】：安徽建筑大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU528
本文編號：2504686
[Abstract]:Now, the construction industry has become an important material production department of the national economic development of our country, it is closely related not only to the development of the whole country economy, but also to the improvement of the quality of the people's life. In the construction industry, cement is one of the main raw materials of the capital construction, and has an outstanding position. It is widely used in many important national pillar industries such as industry, national defense, transportation and water conservancy because it has the characteristics of hydration, condensation and hardening, high strength and so on. At the same time, the serious environmental problems caused by the cement in the production process also become one of the important factors that hinder the economic development. On the other hand, with the rapid development of the social industrialization, many industrial wastes that cannot be digested by the environment, such as fly ash, slag, silica fume, coal and stone, etc. are produced. The industrial wastes cannot be reasonably utilized due to the problems of technology, economy and the like, thus not only occupying a large amount of land, but also seriously polluting the environment. Therefore, how to effectively combine these industrial wastes with cement clinker in the form of mineral admixture or cement admixture has become a problem to be solved by national scholars through reasonable design. So that the use of the cement clinker can be reduced, the environmental pollution of the cement production process is reduced, and a large amount of industrial wastes can be effectively utilized to walk out of a sustainable development road. In this paper, from the degree of hydration reaction of the gelled material, the contribution of the mineral admixture in the composite system to the system is assessed by the qualitative and quantitative measurement of the degree of hydration reaction of the cementing material in the composite cement paste. The change law of the degree of hydration reaction of the gelled material under the conditions of different compounding ratio and different curing age is studied, and the optimum ratio of each cementing material in the composite system is found by combining the drying shrinkage and the compressive strength data of the composite cement paste. This paper is divided into three parts to study the contribution of mineral admixture to the system.1) The binary system of cement and fly ash-cement is measured by chemical combination water method, selective dissolution method and computer means. the hydration reaction degree of the cement and the mineral admixture in the fly ash-silica fume-cement ternary system is analyzed, the curing age is analyzed in combination with the measurement of the drying shrinkage and the compressive strength, the influence rule of the compressive strength and the relationship between the performances are used to find the optimal proportion of each cementing material in the composite system;2) the binary system of the cement and the coal-fired stone-cement is measured qualitatively and quantitatively by the chemical combination water method, the selective dissolution method and the computer means, The hydration reaction degree of cement, coal, stone and slag in the slag-cement binary system, the coal-fired stone-slag-cement ternary system is analyzed, the curing age is analyzed by combining the measurement of the drying shrinkage and the compressive strength, the influence rule of the compressive strength and the relationship between the performances are used to find the optimal ratio of each cementing material in the composite system; and 3) the content of the Ca (OH)2 in the cement, the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system is measured by the method of thermal analysis, In this paper, the hydration degree of the gelled material in the composite system was qualitatively characterized, and the drying shrinkage and the compressive strength data were combined to analyze the effect of the curing age and the matching ratio on the content of Ca (OH)2, the dry shrinkage and the compressive strength of the system, and the relationship between the properties. The following conclusions are drawn:1) comprehensively considering the hydration reaction degree of cement and mineral admixture in the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material, It is considered that when the composite cement paste contains 45% of fly ash and 5% silica fume, the drying shrinkage of the composite material is small, the compressive strength is large, and the utilization ratio of the mineral admixture is the most. The hydration degree of the cement, the coal-fired stone and the slag in the coal-fired stone-slag-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material are considered to be small when the composite cement paste contains 15% of the coal and 15% of the slag, and 3) comprehensively considering the Ca (OH)2 content in the fly ash-cement binary system, the fly ash-silicon ash-cement ternary system, the drying shrinkage and the compressive strength value of the composite cement-based material, It is considered that when the composite cement paste contains 30% fly ash and 10% silica fume, the drying shrinkage of the composite material is small and the compressive strength is large.
【學位授予單位】：安徽建筑大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU528
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