本文選題：偏高嶺土　切入點：土聚水泥　出處：《江蘇大學》2017年碩士論文　論文類型：學位論文

【摘要】：自21世紀開始,中國建筑市場的快速增長,對水泥的需求量日益增加。在生產(chǎn)過程中需要消耗大量的電量,消耗大量的煤礦資源,并產(chǎn)生大量的氮的氧化物、硫的氧化物、一氧化碳等有害氣體,另外,二氧化碳的產(chǎn)生與排放的問題也不容小覷,其是引發(fā)溫室效應的主要因子。急需找到一種綠色環(huán)保型的替代材料。在對已有研究文獻加以梳理之后,我們明確,目前土聚水泥制品的主要生產(chǎn)原料有:礦粉、粉煤灰、偏高嶺土等。土聚水泥基本與普通水泥使用范圍一致,但相對普通水泥而言,制備土聚水泥不需要高溫下發(fā)生反應;生產(chǎn)過程中也未產(chǎn)生污染氣體;工藝簡單,便于施工;耐久性更好。本文主要研究:(1)明確堿激發(fā)劑對土聚水泥流動性、凝結(jié)時間、抗壓強度等性能的影響作用,主要研究了三種激發(fā)劑,分別為:水玻璃、碳酸鈉以及氫氧化鈉。(2)求得堿激發(fā)劑的最佳配比,主要以水玻璃模數(shù)、堿含量這兩項因素的變化影響作用為基礎,對結(jié)果進行深入的分析與總結(jié)最終得到結(jié)論。(3)礦物摻合料最佳配比的確定,主要以粉煤灰以及礦粉產(chǎn)量這兩項因素的變化影響作用為基礎,對結(jié)果展開深入的考察并確定最終結(jié)論。(4)明確土聚水泥性能在不同蒸養(yǎng)制度條件下的變化情況。(5)以最佳配比為基準制備土聚水泥砂漿和混凝土,并對土聚水泥砂漿和混凝土展開性能試驗。實驗結(jié)果表明:(1)激發(fā)效果較好的條件為水玻璃與氫氧化鈉復摻�？梢园l(fā)現(xiàn),土聚水泥流動性與水玻璃模數(shù)呈正相關的關系,與此同時,土聚水泥流動性與激發(fā)劑中堿度呈負相關的關系。土聚水泥性能最佳的條件為:18%的堿度,1.4的水玻璃模數(shù)。(2)粉煤灰-礦粉混合作為摻和料時,其摻量分別為5%和15%時土聚水泥的各項性能較好。(3)土聚水泥強度會在合適的蒸養(yǎng)處理后得以提升。土聚水泥抗壓強度的最優(yōu)蒸養(yǎng)條件為65℃,養(yǎng)護時間為1h。(4)按上述最佳配比制備的土聚水泥砂漿具有較好的7天強度,且具有較好的保水率,28天收縮率較低,同時粘結(jié)強度較高。耐久性更好。土聚水泥砂漿的抗壓強度在高溫處理后明顯高于普通砂漿。具有更好的耐熱性。(5)相比于普通混凝土,土聚混凝土7天、28天的強度均表現(xiàn)更佳;在同樣的加水量下,土聚水泥的坍落度較大。其28天收縮值相比較小,具有更好的耐久性。綜上所述,土聚水泥有著巨大的優(yōu)勢和極大的潛在發(fā)展前景。另外,其應用空間非常廣闊。
[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，

本文編號：1562239