【摘要】：以煤矸石、礦渣和粉煤灰為主要原料,利用其富含的黏土質(zhì)礦物成分,在堿硅酸的作用下,制備性能類(lèi)似"Geopolymer"的地質(zhì)聚合物,稱(chēng)之為煤矸石-礦渣-粉煤灰地質(zhì)聚合物。由于地質(zhì)聚合物可以以工礦業(yè)固體廢棄物為主要原料,且不僅具有優(yōu)良的結(jié)構(gòu)特性和耐久性,還具有良好的經(jīng)濟(jì)性和環(huán)保性,因此備受關(guān)注,成為研究熱點(diǎn)。本文是國(guó)家自然科學(xué)基金煤炭聯(lián)合項(xiàng)目《煤矸石在水泥和混凝土資源化利用中關(guān)鍵科學(xué)問(wèn)題研究》(U1261122)的子項(xiàng)目,所有研究成果都是在該基金的資助下完成并取得的。本文首先研究煤矸石的熱活化,選擇熱活化溫度、保溫時(shí)間和冷卻方式三個(gè)因素,按正交表L16(45)進(jìn)行膠砂強(qiáng)度的正交試驗(yàn),揭示熱活化工藝對(duì)煤矸石活性影響規(guī)律,以此確定煤矸石反應(yīng)活性最佳的工藝制度；接下來(lái),按均勻設(shè)計(jì)中的擬水平法設(shè)計(jì)試驗(yàn),以煤矸石摻量、礦渣摻量、水玻璃模數(shù)、鉀鈉比和配體溶液濃度為變量,以煤矸石-礦渣-粉煤灰地質(zhì)聚合物膠砂強(qiáng)度為目標(biāo)函數(shù),利用MATLAB軟件處理試驗(yàn)數(shù)據(jù),建立之間的定量數(shù)學(xué)關(guān)系式,給出最優(yōu)配合比：最后按最優(yōu)配合比制備地質(zhì)聚合物,并進(jìn)行細(xì)度、凝結(jié)時(shí)間、膠砂強(qiáng)度及體積安定性等膠凝材料主要技術(shù)性質(zhì)的檢測(cè)。取得以下研究成果：(1)阜新清河門(mén)礦煤矸石最佳熱活化工藝制度為：熱活化溫度650℃、保溫時(shí)間2h、風(fēng)冷冷卻。各種因素影響程度大小順序?yàn)椋簾峄罨瘻囟壤鋮s方式保溫時(shí)間熱活化溫度與保溫時(shí)間的交互作用。(2)通過(guò)均勻試驗(yàn),得出了煤矸石-礦渣-粉煤灰地質(zhì)聚合物3d和28d的抗折、抗壓強(qiáng)度一系列回歸方程。該公式的建立在己知煤矸石摻量、礦渣摻量、水玻璃模數(shù)、鉀鈉比及水玻璃濃度時(shí),可估算出煤矸石-礦渣-粉煤灰地質(zhì)聚合物的3d和28d的抗折、抗壓強(qiáng)度值,對(duì)工程具有實(shí)際指導(dǎo)意義。(3)煤矸石-礦渣-粉煤灰地質(zhì)聚合物的細(xì)度為1003.07m2/kg、初凝時(shí)間為60min、終凝時(shí)間為90min、體積安定性合格,四個(gè)指標(biāo)皆滿(mǎn)足國(guó)家標(biāo)準(zhǔn)對(duì)硅酸鹽水泥的技術(shù)要求,且表現(xiàn)出快硬、早強(qiáng)的技術(shù)特點(diǎn)。
[Abstract]:Using coal gangue, slag and fly ash as the main raw materials, using the rich clay mineral composition, the geopolymer with similar properties as "Geopolymer" is prepared under the action of alkali silicic acid, which is called coal gangue, slag and fly ash geopolymer. Because geopolymers can take industrial and mining solid waste as the main raw materials, and have not only excellent structural characteristics and durability, but also good economic and environmental protection, so they have attracted much attention and become a research hotspot. This paper is a sub-project of the National Natural Science Foundation coal joint project < Research on key Scientific problems of Coal gangue in cement and concrete Recycling Utilization "(U1261122). All the research results have been completed and obtained with the aid of this fund. This paper first studies the thermal activation of coal gangue, selects three factors of thermal activation temperature, heat preservation time and cooling method, carries out orthogonal test of cement sand strength according to orthogonal table L16 (45), and reveals the influence law of thermal activation technology on coal gangue activity. The optimum reaction activity of coal gangue was determined. Then, according to the quasi-horizontal design method in uniform design, the content of coal gangue, slag, water glass modulus, potassium / sodium ratio and the concentration of ligand solution were taken as variables. Taking the strength of coal gangue, slag and fly ash geopolymer cement as objective function, using MATLAB software to process the test data, the quantitative mathematical relation between them is established, and the optimum mix ratio is given. Finally, the geological polymer is prepared according to the optimum mix ratio. The main technical properties of cementing materials, such as fineness, setting time, cement sand strength and volume stability, were tested. The following research results have been obtained: (1) the optimum thermal activation process system of coal gangue in Qinghemen Mine of Fuxin is as follows: the temperature of thermal activation is 650 鈩，

本文編號(hào)：2413821