本文選題：α型發(fā)泡石膏 + 力學(xué)性能�。� 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：脫硫石膏作為熱電廠產(chǎn)量及儲量最大的工業(yè)副產(chǎn)品,對其進行合理利用具有重要的環(huán)保意義及經(jīng)濟意義。α型高強石膏具有優(yōu)良的理化性能及廣泛的應(yīng)用,是實現(xiàn)脫硫石膏固廢資源化利用的有效途徑。本文以α型高強石膏為原料,以鋁粉為發(fā)氣劑進行發(fā)氣反應(yīng)制備αα型發(fā)泡石膏,關(guān)注產(chǎn)物的抗壓抗折強度與軟化系數(shù),并將宏觀性力學(xué)性能與孔結(jié)構(gòu)相結(jié)合進行分析,利用Matlab圖像處理程序?qū)捉Y(jié)構(gòu)進行計算表征,利用XRD、SEM手段對產(chǎn)品微觀結(jié)構(gòu)進行表征,綜合考慮各方面影響,最終確定最優(yōu)配比。主要研究結(jié)果如下:(1)采取控制變量法,通過單因素實驗考察水灰比、鋁粉用量、發(fā)氣溫度、生石灰用量、穩(wěn)泡劑及緩凝劑用量對產(chǎn)品抗壓抗折強度、軟化系數(shù)及孔徑分布的影響,確定了各影響因素較好的摻加范圍。結(jié)果表明:水料比為0.60-0.65,鋁粉用量為0.3%-0.4%,發(fā)氣溫度為40℃左右,生石灰用量為10%-13%,穩(wěn)泡劑用量1.2%-1.3%,緩凝劑用量為0.04%時可以保證制得具有良好性能的發(fā)泡石膏。(2)采用正交試驗探討在發(fā)泡石膏生產(chǎn)過程中各因素之間的交互作用,對實驗結(jié)果進行極差分析,確定以不同性能為產(chǎn)品指標(biāo)的最優(yōu)生產(chǎn)條件。結(jié)果表明:以密度、抗壓強度、抗折強度作為性能指標(biāo),最關(guān)鍵影響因素為水灰比與溫度;以比強度作為性能指標(biāo),最關(guān)鍵影響因素為水灰比與氧化鈣。綜合考慮各方面因素,最終優(yōu)化出本次α型發(fā)泡石膏的最優(yōu)配比為:水灰比0.61,鋁粉摻量為0.36%,生石灰摻量12.80%,硬脂酸鈣摻量1.20%,發(fā)氣溫度為37℃,檸檬酸摻量為0.04%。(3)將Matlab圖像處理技術(shù)應(yīng)用于α型發(fā)泡石膏內(nèi)部孔結(jié)構(gòu)的分析。編寫出了適用于本實驗產(chǎn)物的分析程序,并對該程序的可行性進行了驗證,對誤差來源進行了討論。同時從物理化學(xué)角度對誤差產(chǎn)生原因進行了相關(guān)解釋。
[Abstract]:Desulphurization gypsum, as the industrial by-product with the largest output and reserves in thermal power plants, has important environmental and economic significance in its rational utilization, and 偽 type high strength gypsum has excellent physical and chemical properties and wide application. It is an effective way to realize solid waste utilization of desulphurized gypsum. In this paper, 偽 type foaming gypsum was prepared from 偽 -type high strength gypsum and aluminum powder as gassing agent. The compressive flexural strength and softening coefficient of the product were concerned, and the macro mechanical properties and pore structure were analyzed. The pore structure was calculated and characterized by Matlab image processing program, and the microstructure of the product was characterized by means of XRDX SEM. The main results are as follows: (1) by using the method of controlling variables, the compressive and flexural strength of the product was investigated by single factor experiment, such as water-cement ratio, amount of aluminum powder, temperature of gas generation, dosage of quicklime, amount of foam stabilizer and retarder. The influence of softening coefficient and pore size distribution on the addition range of each factor was determined. The results show that the ratio of water to material is 0.60-0.65, the amount of aluminum powder is 0.3-0.4, and the gas temperature is about 40 鈩，

本文編號：2094255