硬化水泥漿體結(jié)構(gòu)和性能與熟料礦物匹配水化的關(guān)系
發(fā)布時(shí)間：2019-03-16 16:44
【摘要】：水泥基材料是目前用量最大、用途最廣的土木工程材料，對(duì)國(guó)民經(jīng)濟(jì)的發(fā)展起著重要的作用，但是水泥基復(fù)合材料也存在其本身缺陷。比如其韌性差、抗折強(qiáng)度低；在惡劣環(huán)境下容易受各種離子的侵入腐蝕，使結(jié)構(gòu)遭到破壞等。雖然這些年許多學(xué)者采取各種措施來(lái)解決上述問(wèn)題，比如摻加各種外加劑、礦物細(xì)摻料研制高性能混凝土，在一定程度上改善了混凝土的強(qiáng)度和耐久性，但是水泥基材料破壞的根本原因還是在于其結(jié)構(gòu)的致密性低、均勻性差。因此，需要從材料的結(jié)構(gòu)和構(gòu)造入手，進(jìn)一步提高水泥基材料的性能，對(duì)水泥熟料礦物之間的匹配水化的機(jī)理進(jìn)行研究，控制形成勻質(zhì)漿體結(jié)構(gòu)的各種因素，生產(chǎn)出結(jié)構(gòu)致密、均勻、耐久性好、使用壽命高的優(yōu)質(zhì)混凝土。 本文從熟料礦物組成，晶種誘導(dǎo)水泥水化以及熟料的顆粒組成三方面對(duì)熟料礦物匹配水化進(jìn)行了研究，通過(guò)控制水泥熟料各礦物相之間的匹配水化，達(dá)到控制水化產(chǎn)物形成的速率、形態(tài)與尺寸、顆粒分布與堆積情況等，最終控制水泥基材料硬化漿體形成均勻和致密的結(jié)構(gòu)。主要的研究成果及結(jié)論如下： 1.礦物組成對(duì)熟料匹配水化及硬化漿體結(jié)構(gòu)和性能的影響 （1）硬化漿體的1d抗壓強(qiáng)度總體上與C3A含量相關(guān)性較好，但是，當(dāng)KH=0.87時(shí)，與(C3S+C3A)/C4AF比值的相關(guān)性更好，相關(guān)系數(shù)為0.9996。28d強(qiáng)度與C3S含量相關(guān)性較好，相關(guān)系數(shù)為0.9251，但是，當(dāng)KH=0.87時(shí)，與(C3S+C3A)/C4AF的比值相關(guān)性更好，相關(guān)系數(shù)為0.9684，而當(dāng)KH=0.93時(shí)，28d強(qiáng)度與C3S/C2S的比值相關(guān)性較好，相關(guān)系數(shù)為0.9989。90d的強(qiáng)度在KH=0.87時(shí)與(C3S+C2S)/C4AF的比值相關(guān)性較好，相關(guān)系數(shù)為0.9998。 （2）熟料中C3A的含量是影響1h內(nèi)水泥水化放熱速率的主要因素，當(dāng)C3A含量相差不大時(shí)，C3S的含量對(duì)水泥試樣的水化放熱速率有重要影響；C3S含量對(duì)水泥試樣30h后的水化速率其重要作用。 （3）當(dāng)熟料四種主要的礦物含量分別為C3S58.6%，C2S17.9%，C3A9.6%，C4AF11.3%時(shí)，各熟料間匹配水化好，硬化水泥漿體的平均孔徑為9.35μm，最可幾孔徑為3.15μm，孔隙率為5.29%，90d抗壓強(qiáng)度達(dá)到135.1MPa，最終形成致密均勻的硬化漿體結(jié)構(gòu)。 2.晶種誘導(dǎo)對(duì)硬化漿體結(jié)構(gòu)與性能的影響 （1）摻加晶種可以提高普通硅酸鹽水泥的水化放熱速率，，對(duì)水泥有促凝作用；當(dāng)摻加晶種的水灰比為0.28，養(yǎng)護(hù)56d時(shí)，對(duì)水泥漿體性能的優(yōu)化效果最好。 （2）摻加晶種優(yōu)化漿體結(jié)構(gòu)，進(jìn)而提高試樣的抗壓、抗折強(qiáng)度，并能確定晶種的最佳摻量為4%。在最佳摻量下，56d齡期的晶種比28d齡期晶種對(duì)水泥強(qiáng)度的影響效果更好，能使水泥的3d抗壓、抗折強(qiáng)度分別提高13.63%、45.26%，7d抗壓、抗折強(qiáng)度分別提高10.29%、17.23%，28d抗壓、抗折強(qiáng)度分別提高13.83%、23.03%。 3.熟料顆粒組成對(duì)硬化漿體和結(jié)構(gòu)與性能的影響 合理控制水泥熟料的顆粒組成，使各粒徑范圍內(nèi)熟料水化速率匹配，水化產(chǎn)物合理的交織連接在一起，進(jìn)而可使硬化水泥漿體得到最高的強(qiáng)度與最優(yōu)的結(jié)構(gòu)。本文中熟料粒徑0.4-6μm占28.61%，6-20μm占42.8%，20-40μm占26.2%時(shí)熟料礦物匹配水化的較好，硬化漿體強(qiáng)度最高為99.4MPa，其平均孔徑為11.9μm，最可幾孔徑為3.5μm，孔隙率為4.3%。
[Abstract]:The cement-based material is the most widely used civil engineering material, and plays an important role in the development of the national economy, but the cement-based composite also has its own defects. Such as poor toughness and low bending strength, and is easy to be corroded by various ions in a severe environment, so that the structure is damaged and the like. Although many scholars in these years have taken various measures to solve the above problems, such as adding various kinds of additives and mineral fine materials to develop high-performance concrete, the strength and the durability of the concrete are improved to a certain extent, However, the root cause of the failure of the cement-based material is that the structure of the cement-based material is low in density and poor in uniformity. Therefore, the structure and the structure of the material need to be started, the performance of the cement-based material is further improved, the mechanism of the matching and hydration between the cement clinker minerals is researched, various factors forming the homogeneous slurry structure are controlled, the structure is compact, uniform, and the durability is good, High-quality concrete with high service life. In this paper, the hydration of the clinker minerals is studied from the three aspects of the clinker mineral composition, the seed crystal-induced cement hydration and the particle composition of the clinker, and the rate, the shape and the rule of the formation of the hydration products are achieved by controlling the matching hydration between the mineral phases of the cement clinker. Inch, particle distribution and accumulation, etc., and finally control the cement-based material to harden the slurry to form a uniform and dense junction. The main research results and conclusions are as follows: in that follow:1. the structure and the property of the mineral composition to the hydration of the clinker and the structure and properties of the hardened slurry The effect of (1) the 1 d compressive strength of the hardened slurry is generally associated with the C3A content, but when KH = 0.87, the ratio to (C3S + C3A)/ C4AF The correlation coefficient was 0.9996.28 d. The correlation coefficient was 0.9251. However, when KH = 0.87, the correlation was better with (C3S + C3A)/ C4AF, the correlation coefficient was 0.9684, and when KH = 0.93, the ratio of 28d strength to C3S/ C2S The correlation was good. The correlation coefficient was 0.9989.90d. The correlation coefficient was 0.87 and the correlation coefficient was 0. .9998. (2) The content of C3A in the clinker is the main factor that affects the hydration heat release rate of the cement in one hour. When the content of C3A is not large, the content of C3S has an important influence on the hydration heat release rate of the cement sample, and the content of the C3S is 30 h after the cement sample. The main mineral content of the clinker is C3S58.6%, C2117.9%, C3A9.6%, C4AF11.3%, the matching of the clinker is good, the average pore diameter of the hardened cement slurry is 9.35. m u.m, the most probable pore size is 3.15. m u.m, the porosity is 5.29%, and the compressive strength of 90d is up to to 135.1 MPa, resulting in a dense formation uniform hardening slurry structure.2. seed-induced alignment the effect of the structure and the performance of the hardened slurry (1) is that the seed crystal can improve the hydration heat release rate of the ordinary portland cement, The optimum effect of the properties of the cement paste is as follows: (2) the seed crystal is doped to optimize the structure of the slurry, so that the compressive strength and the breaking strength of the sample are improved. And the optimal content of the seed crystal is 4%. Under the optimum mixing amount, the effect of the seed crystal at the age of 56d on the strength of the cement is better than that of the seed crystal at the age of 28d, the 3d compression resistance and the bending strength of the cement can be increased by 13.63%, 45.26% and 7d respectively, and the bending strength is increased by 10.29%, 17.23% and 28d respectively. and the bending strength Increase of 13.83%, 23.03%.3. Clinker the effect of the particle composition on the hardened slurry and the structure and the performance is reasonable to control the particle composition of the cement clinker, the rate matching and the reasonable interweaving of the hydration products are connected together, The maximum strength and optimum structure of the hardened cement paste are obtained. The particle size of the clinker in this paper is 28.61%, 42.8% in 6-20. m u.m,20-40. m. m is 26.2%, the strength of the hardened slurry is 99.4 MPa, and the average pore diameter is 11.9. m
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TQ172.1
本文編號(hào)：2441758
[Abstract]:The cement-based material is the most widely used civil engineering material, and plays an important role in the development of the national economy, but the cement-based composite also has its own defects. Such as poor toughness and low bending strength, and is easy to be corroded by various ions in a severe environment, so that the structure is damaged and the like. Although many scholars in these years have taken various measures to solve the above problems, such as adding various kinds of additives and mineral fine materials to develop high-performance concrete, the strength and the durability of the concrete are improved to a certain extent, However, the root cause of the failure of the cement-based material is that the structure of the cement-based material is low in density and poor in uniformity. Therefore, the structure and the structure of the material need to be started, the performance of the cement-based material is further improved, the mechanism of the matching and hydration between the cement clinker minerals is researched, various factors forming the homogeneous slurry structure are controlled, the structure is compact, uniform, and the durability is good, High-quality concrete with high service life. In this paper, the hydration of the clinker minerals is studied from the three aspects of the clinker mineral composition, the seed crystal-induced cement hydration and the particle composition of the clinker, and the rate, the shape and the rule of the formation of the hydration products are achieved by controlling the matching hydration between the mineral phases of the cement clinker. Inch, particle distribution and accumulation, etc., and finally control the cement-based material to harden the slurry to form a uniform and dense junction. The main research results and conclusions are as follows: in that follow:1. the structure and the property of the mineral composition to the hydration of the clinker and the structure and properties of the hardened slurry The effect of (1) the 1 d compressive strength of the hardened slurry is generally associated with the C3A content, but when KH = 0.87, the ratio to (C3S + C3A)/ C4AF The correlation coefficient was 0.9996.28 d. The correlation coefficient was 0.9251. However, when KH = 0.87, the correlation was better with (C3S + C3A)/ C4AF, the correlation coefficient was 0.9684, and when KH = 0.93, the ratio of 28d strength to C3S/ C2S The correlation was good. The correlation coefficient was 0.9989.90d. The correlation coefficient was 0.87 and the correlation coefficient was 0. .9998. (2) The content of C3A in the clinker is the main factor that affects the hydration heat release rate of the cement in one hour. When the content of C3A is not large, the content of C3S has an important influence on the hydration heat release rate of the cement sample, and the content of the C3S is 30 h after the cement sample. The main mineral content of the clinker is C3S58.6%, C2117.9%, C3A9.6%, C4AF11.3%, the matching of the clinker is good, the average pore diameter of the hardened cement slurry is 9.35. m u.m, the most probable pore size is 3.15. m u.m, the porosity is 5.29%, and the compressive strength of 90d is up to to 135.1 MPa, resulting in a dense formation uniform hardening slurry structure.2. seed-induced alignment the effect of the structure and the performance of the hardened slurry (1) is that the seed crystal can improve the hydration heat release rate of the ordinary portland cement, The optimum effect of the properties of the cement paste is as follows: (2) the seed crystal is doped to optimize the structure of the slurry, so that the compressive strength and the breaking strength of the sample are improved. And the optimal content of the seed crystal is 4%. Under the optimum mixing amount, the effect of the seed crystal at the age of 56d on the strength of the cement is better than that of the seed crystal at the age of 28d, the 3d compression resistance and the bending strength of the cement can be increased by 13.63%, 45.26% and 7d respectively, and the bending strength is increased by 10.29%, 17.23% and 28d respectively. and the bending strength Increase of 13.83%, 23.03%.3. Clinker the effect of the particle composition on the hardened slurry and the structure and the performance is reasonable to control the particle composition of the cement clinker, the rate matching and the reasonable interweaving of the hydration products are connected together, The maximum strength and optimum structure of the hardened cement paste are obtained. The particle size of the clinker in this paper is 28.61%, 42.8% in 6-20. m u.m,20-40. m. m is 26.2%, the strength of the hardened slurry is 99.4 MPa, and the average pore diameter is 11.9. m
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TQ172.1
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