土聚水泥及其制品性能研究

发布时间：2018-03-03 18:44

  本文选题：偏高岭土　切入点：土聚水泥　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：自21世纪开始,中国建筑市场的快速增长,对水泥的需求量日益增加。在生产过程中需要消耗大量的电量,消耗大量的煤矿资源,并产生大量的氮的氧化物、硫的氧化物、一氧化碳等有害气体,另外,二氧化碳的产生与排放的问题也不容小觑,其是引发温室效应的主要因子。急需找到一种绿色环保型的替代材料。在对已有研究文献加以梳理之后,我们明确,目前土聚水泥制品的主要生产原料有:矿粉、粉煤灰、偏高岭土等。土聚水泥基本与普通水泥使用范围一致,但相对普通水泥而言,制备土聚水泥不需要高温下发生反应;生产过程中也未产生污染气体;工艺简单,便于施工;耐久性更好。本文主要研究:(1)明确碱激发剂对土聚水泥流动性、凝结时间、抗压强度等性能的影响作用,主要研究了三种激发剂,分别为:水玻璃、碳酸钠以及氢氧化钠。(2)求得碱激发剂的最佳配比,主要以水玻璃模数、碱含量这两项因素的变化影响作用为基础,对结果进行深入的分析与总结最终得到结论。(3)矿物掺合料最佳配比的确定,主要以粉煤灰以及矿粉产量这两项因素的变化影响作用为基础,对结果展开深入的考察并确定最终结论。(4)明确土聚水泥性能在不同蒸养制度条件下的变化情况。(5)以最佳配比为基准制备土聚水泥砂浆和混凝土,并对土聚水泥砂浆和混凝土展开性能试验。实验结果表明:(1)激发效果较好的条件为水玻璃与氢氧化钠复掺。可以发现,土聚水泥流动性与水玻璃模数呈正相关的关系,与此同时,土聚水泥流动性与激发剂中碱度呈负相关的关系。土聚水泥性能最佳的条件为:18%的碱度,1.4的水玻璃模数。(2)粉煤灰-矿粉混合作为掺和料时,其掺量分别为5%和15%时土聚水泥的各项性能较好。(3)土聚水泥强度会在合适的蒸养处理后得以提升。土聚水泥抗压强度的最优蒸养条件为65℃,养护时间为1h。(4)按上述最佳配比制备的土聚水泥砂浆具有较好的7天强度,且具有较好的保水率,28天收缩率较低,同时粘结强度较高。耐久性更好。土聚水泥砂浆的抗压强度在高温处理后明显高于普通砂浆。具有更好的耐热性。(5)相比于普通混凝土,土聚混凝土7天、28天的强度均表现更佳;在同样的加水量下,土聚水泥的坍落度较大。其28天收缩值相比较小,具有更好的耐久性。综上所述,土聚水泥有着巨大的优势和极大的潜在发展前景。另外,其应用空间非常广阔。
[Abstract]:Since 21th century, with the rapid growth of the construction market in China, the demand for cement has been increasing. In the production process, a large amount of electricity is consumed, a large number of coal resources are consumed, and a large number of nitrogen oxides, sulfur oxides are produced. Carbon monoxide and other harmful gases, in addition, the problem of carbon dioxide generation and emissions should not be underestimated. It is the main cause of Greenhouse Effect. It is urgent to find a green and environment-friendly alternative material. After combing the existing research literature, we clearly know that the main raw materials for the production of soil-aggregate cement products are: mineral powder, fly ash, Metakaolin cement is basically the same as ordinary cement, but compared with ordinary cement, the preparation of soil-aggregate cement does not need reaction at high temperature, no pollution gas is produced in the production process, the process is simple and convenient for construction. This paper mainly studies the effect of alkali activator on the fluidity, setting time and compressive strength of soil-polymerized cement, and mainly studies three kinds of activators: water glass, water glass, etc. Sodium carbonate and sodium hydroxide. 2) the optimum ratio of alkali activator was obtained, which was mainly based on the influence of two factors, the modulus of sodium silicate and the content of sodium hydroxide. The results are analyzed and summarized deeply and finally the conclusion is drawn that the optimum proportion of mineral admixture is determined, which is mainly based on the influence of two factors, the fly ash and the output of mineral powder. The results were investigated deeply and the final conclusion was determined. (4) the change of soil-aggregate cement properties under different conditions of steaming system was determined. (5) the optimum ratio was used as the basis for preparing soil-aggregate cement mortar and concrete. The experimental results show that water glass and sodium hydroxide are the best excitation conditions for soil-aggregate cement mortar and concrete. It can be found that the fluidity of soil-aggregate cement is positively related to the modulus of water glass. At the same time, there is a negative correlation between the fluidity of soil-aggregate cement and the alkalinity of the activator. The optimum condition for the performance of soil-polymerized cement is: 1. 18% alkalinity of 1.4% sodium silicate modulus. 2) when the mixture of fly ash and mineral powder is used as the admixture, The strength of soil-polymerized cement will be improved after proper steaming treatment, and the optimum curing condition of compressive strength of soil-aggregate cement is 65 鈩，

本文编号：1562239