高钛型高炉渣自密实混凝土配制研究

发布时间：2018-01-14 08:03

本文关键词：高钛型高炉渣自密实混凝土配制研究　出处：《西华大学》2016年硕士论文　论文类型：学位论文

【摘要】：高钛型高炉渣是攀西地区的一种工业固态废弃物,因其材料稳定性和无危害的特点,作为混凝土的骨料配制普通混凝土,在工程上已经广泛应用。其作为一种新型建筑材料,可以减少对环境的污染和缓解天然砂石不足的问题。自密实混凝土在攀西地区已经应用,但利用高钛型高炉渣配制自密实混凝土还未研究与应用。本文研究利用高钛型高炉渣配制自密实混凝土可以为其利用提供理论支撑和提高其综合开发利用。本论文利用高钛型高炉渣替代普通砂石作为粗细骨料配制全矿渣自密实混凝土。对高钛型高炉渣砂石进行原材料研究;设计计算了高钛型高炉渣自密实混凝土基准配合比并对其进行了工作性能和力学性能试验研究;然后通过试验研究了原材料用量对高钛型高炉渣自密实混凝土工作性能和力学性能影响;最后针对高钛型高炉渣原材料的吸水率大和空隙率大的特点,对其进行了抗水渗透试验和收缩变形试验,对比普通自密实混凝土分析其特点。试验结果表明:(1)对高钛型高炉渣原材料研究,得出高钛渣碎石24h吸水率为12%,饱和面干吸水率为4%;高钛渣砂24h小时吸水率为12%,饱和面干吸水率为11.5%,其吸水率都高于规范对配制自密实混凝土原材料的要求;碎石、砂表面粗糙多孔,通过筛分试验对砂石级配进行研究。(2)针对高钛型高炉渣的吸水率高,提出了准确计算实际用水量和需水量的方法;针对高钛型高炉渣的空隙率大,且测量较麻烦,提出了质量法来计算用砂量。(3)通过研究各参数对高钛型自密实混凝土工作性能和力学性能影响,得出了各因素的最优用量。外加剂掺量在1.8%,水胶比在0.44-0.46,粉煤灰掺量在25%,砂率在0.58,粗骨料粒径比例在6:4时,高钛渣自密实混凝土取得较优的工作性和力学性能。(4)通过高钛渣自密实混凝土进行渗透试验得出抗渗等级?P26,平均渗水高度为22.4mm;通过高钛渣自密实混凝土进行收缩变形试验得出其随时间变化的曲线。与普通自密实混凝土对比分析,得出了高钛型高炉渣自密实混凝土具有较好的抗水渗透性能和抗收缩变形性能。
[Abstract]:High titanium blast furnace slag is an industrial solid waste in Panxi area, because of its material stability and no harm, as a concrete aggregate with ordinary concrete, has been widely used in engineering. As a kind of new building materials, can reduce the environmental pollution and alleviate the shortage of natural sand. Self compacting concrete has been applied in Panxi area, but the use of high titanium slag preparation of self compacting concrete has not been studied and applied. This paper studies the use of high titanium slag preparation of self compacting concrete can provide theoretical support and improve its comprehensive utilization for its use. The high titanium slag as coarse and fine the slag aggregate self compacting concrete instead of ordinary sand. Of raw materials of high titanium blast furnace slag sand; design and calculation of the high titanium slag self compacting concrete mix benchmark And has carried on the performance test of working performance and mechanics; then through the tests of raw material usage effect on workability and mechanical properties of self compacting concrete with high titanium slag; finally, water absorption of high titanium blast furnace slag rate of raw materials and large porosity characteristics, the resistance to water penetration test and shrinkage test, comparative analysis of the characteristics of self compacting concrete. Experimental results show that: (1) high titanium blast furnace slag as raw material, the high titanium slag gravel 24h water absorption rate was 12%, the water absorption rate is 4% saturated dry surface; high titanium slag sand 24h hours water absorption rate is 12%, the water absorption rate is 11.5% dry saturated surface, the water absorption rate is higher than the standard for the preparation of self compacting concrete raw material requirements; sand gravel, rough and porous surface, through the screening test of sand gradation are studied. (2) for the high titanium blast furnace slag water absorption rate is high, is put forward Accurate method of calculating the actual water consumption and demand; the gap of high titanium blast furnace slag rate, and the measurement is more trouble, proposed the quality method to calculate the amount of sand in. (3) through the research on the parameters of high titanium working performance and mechanical properties of self compacting concrete, and gives the optimal dosage of various factors the amount of admixture. In 1.8%, water cement ratio in the 0.44-0.46, the amount of fly ash in 25%, sand rate at 0.58, the particle size of coarse aggregate in the proportion of 6:4, high titanium slag self compacting concrete work and better mechanical properties. (4) the high titanium slag self compacting concrete in penetration tests the impermeability grade? P26, average seepage height is 22.4mm; the high titanium slag self compacting concrete shrinkage deformation test results show that the time-varying curves of self compacting concrete. Compared with ordinary analysis, obtained the high titanium slag self compacting concrete has good water permeability Permeability and anti shrinkage deformability.

【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU528

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