本文選題：廢棄玻璃粉 + 廢棄玻璃砂　； 參考：《青島理工大學(xué)》2016年碩士論文

【摘要】：隨著世界工業(yè)化的進(jìn)程,固體廢棄物的消耗量呈現(xiàn)逐年遞增的趨勢,其中廢棄玻璃的消耗量占全球固體廢棄物消耗量的7%。把廢棄玻璃作為礦物摻合料參與生產(chǎn)水泥砂漿,其力學(xué)性能、高溫下的體積穩(wěn)定性以及廢棄玻璃中SiO_2的活性含量都直接影響廢棄玻璃水泥砂漿的預(yù)期工作性能。為此,本文通過試驗(yàn)系統(tǒng)研究了廢棄玻璃粉、玻璃砂水泥砂漿的配合比設(shè)計(jì)、基本物理力學(xué)性能、高溫下的體積穩(wěn)定性能、廢棄玻璃粉中活性SiO_2的含量,為廢棄玻璃在混凝土中的循環(huán)使用和進(jìn)一步優(yōu)化提供試驗(yàn)與理論依據(jù)。研究的主要結(jié)論如下:1.廢棄玻璃粉取代部分水泥制成水泥砂漿,隨著廢棄玻璃粉摻量的增加,水泥砂漿試件的抗壓強(qiáng)度先增大后降低。正交試驗(yàn)結(jié)果顯示:玻璃粉摻量為10%、水膠比為0.4、膠凝總量為450kg/m~3時廢棄玻璃粉水泥砂漿試件的抗壓強(qiáng)度達(dá)到最大值。對廢棄玻璃粉水泥砂漿試件進(jìn)行極差、方差分析顯示:影響抗壓強(qiáng)度最顯著的為玻璃粉摻量,其次為水膠比,而膠凝總量和玻璃粉的顏色對強(qiáng)度的影響很小。2.隨著養(yǎng)護(hù)齡期的延長,廢棄玻璃粉水泥砂漿試件的抗壓強(qiáng)度增大,前28d抗壓強(qiáng)度增長較快,28d后抗壓強(qiáng)度增長逐漸變緩,說明廢棄玻璃粉具有一定的活性、具有提高試件早期強(qiáng)度的特點(diǎn)。3.由熱重實(shí)驗(yàn)結(jié)果可見:隨著溫度上升,在120-150攝氏度區(qū)間分解廢棄玻璃粉水泥砂漿試件樣品中的水分、在440-460攝氏度區(qū)間分解Ca(OH)_2、在700-730攝氏度區(qū)間分解CaCO_3;隨著養(yǎng)護(hù)齡期的延長,摻加廢棄玻璃粉的試件樣品中Ca(OH)_2分解量有降低的趨勢,說明玻璃粉中的活性SiO_2會消耗掉一部分水泥水化產(chǎn)物Ca(OH)_2形成水化硅酸鈣,從而熱重圖示中的Ca(OH)_2分解量降低。4.廢棄玻璃粉取代部分水泥、廢棄玻璃砂取代部分標(biāo)準(zhǔn)砂分別制成水泥砂漿試塊件,80度水浴條件下研究玻璃組分中的活性SiO_2與砂漿中的堿是否存在潛在的堿-硅酸反應(yīng)破壞。結(jié)果表明:在14d的標(biāo)準(zhǔn)養(yǎng)護(hù)條件下所有試件膨脹率均低于0.1%,所有試樣均無開裂、變形、表面無膠狀物滲出,證明不存在潛在的堿-硅酸膨脹破壞,;當(dāng)80度水浴養(yǎng)護(hù)到56d后摻加30%的玻璃砂砂漿試塊的膨脹率大于0.2%,可能存在潛在的堿-硅酸反應(yīng)膨脹破壞的危害;通過SEM電鏡掃描顯示綠色玻璃表面平滑,白色玻璃表面空隙較多,證明白色玻璃試件相較于綠色玻璃試件更容易發(fā)生堿-硅酸反應(yīng)膨脹破壞。5.廢棄玻璃粉中活性SiO_2的活性率Ka隨著玻璃顆粒在球磨機(jī)中的研磨時間發(fā)生變化:研磨時間越長,粒度越細(xì),玻璃粉中SiO_2活性率Ka也越高,研磨2h后玻璃粉中SiO_2活性率Ka增長緩慢,并逐漸趨于穩(wěn)定;通過活性指數(shù)法研究綠色、白色、棕色三種玻璃粉水泥膠砂試件對砂漿強(qiáng)度的影響,養(yǎng)護(hù)7d后的三種顏色玻璃粉水泥膠砂的活性指數(shù)大小為分別為45.3%,28.9%,57.1%,養(yǎng)護(hù)28d后的三種顏色玻璃粉水泥膠砂的活性指數(shù)大小為分別為60.2%,43.6%,60.95%,證明三種顏色玻璃粉的活性大小為:棕色綠色白色。
[Abstract]:With the process of industrialization in the world, the consumption of solid waste is increasing year by year, in which waste glass is consumed by 7%. in the global solid waste consumption. Waste glass is used as mineral admixture to produce cement mortar. The mechanical properties, bulk stability at high temperature and the active content of SiO_2 in waste glass In this paper, the mixing ratio design of waste glass powder and glass sand cement mortar, the basic physical and mechanical properties, the volume stability at high temperature, the content of the active SiO_2 in the waste glass powder and the circulation of the waste glass in the concrete are studied by the test system. The main conclusions are as follows: 1. the main conclusions are as follows: the cement mortar is replaced by some waste glass powder. With the increase of the amount of waste glass powder, the compressive strength of the cement mortar increases first and then decreases. The orthogonal test results show that the content of glass powder is 10%, the ratio of water to glue is 0.4, and the aggregate amount is 4. The compressive strength of the abandoned glass cement mortar specimens reached the maximum at 50kg/m~3. The variance analysis showed that the most significant influence of the compressive strength was the amount of glass powder, followed by the water glue ratio, while the effect of the gross gelation amount and the color of glass powder on the strength was very small.2. along with the maintenance age. The compressive strength of the abandoned glass cement mortar specimens increases, the compressive strength of the former 28d increases rapidly, and the compressive strength increases gradually after 28d, which indicates that the waste glass powder has a certain activity and has the characteristic of improving the early strength of the specimen..3. is seen from the thermogravimetric experimental results: with the temperature rising, the discarded glassy is decomposed in the range of 120-150 degrees Celsius. The moisture content in the sample of glazing cement mortar is Ca (OH) _2 in the interval of 440-460 degrees Celsius, and CaCO_3 is decomposed at 700-730 degrees Celsius. With the prolongation of the curing age, the decomposition of Ca (OH) _2 in the samples with waste glass powder is reduced, indicating that the active SiO_2 in the glass powder will consume a part of the cement hydration product Ca (O). H) _2 formed a hydrated calcium silicate, thus the decomposition of Ca (OH) _2 in the thermogravimetric diagram was reduced by.4. waste glass powder instead of partial cement. The waste glass sand was replaced by some standard sand instead of a part of the cement mortar. The potential alkali silica reaction damage in the active SiO_2 in the glass component and the alkali in the slurry was studied under the condition of 80 degree water bath. The results show that the expansion rate of all the specimens under the standard curing condition of 14d is less than 0.1%. All the samples have no cracking, deformation, and no glue oozing on the surface. It proves that there is no potential alkali silicic acid expansion damage. When the 80 degree water bath curing to 56d, the expansion ratio of 30% glass sand mortar is more than 0.2%, and there may be potential alkali silica acid. The damage caused by expansion and destruction, the SEM scanning electron microscope shows that the surface of green glass is smooth and the white glass surface is more void. It is proved that the white glass specimen is more prone to alkali silicic acid reaction expansion to destroy the active SiO_2 in the.5. waste glass powder than the green glass specimen, and with the grinding time of the glass particles in the ball mill. Change: the longer the grinding time, the finer the granularity, the higher the SiO_2 activity in the glass powder, the higher the Ka activity of the glass powder, the SiO_2 activity rate Ka in the glass powder after 2H grinding is slow, and gradually tends to be stable. The effect of green, white and brown three kinds of glass powder cement mortar on the strength of the mortar is studied by the active index method, and the three kinds of glass powder after 7d are cured. The active index of cement mortar is 45.3%, 28.9%, 57.1%. The activity index of three kinds of glass powder cement mortar after curing 28d is 60.2%, 43.6%, 60.95% respectively. It is proved that the activity size of the three kinds of color glass powder is: brown green white.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TQ177.62

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