外文翻譯---廢棄混凝土再生新技術(shù)探索-全文預覽
【正文】 and dehydration temperature of recycled cement performance cannot be ignored. 1. Determine the deposition temperature of waste concrete Concrete is made of cement, thick aggregate, such as mineral admixture, the water hydration sclerosis regarding mixproportion formed a microscopic uneven, macro uniform manmade stone. Abandoned the concrete in low temperature calcination temperature by cement dehydration temperature deposition temperatures decided together with limestone. 1 [2] WangYaoXin. Mix with application of natural regeneration aggregate concrete, basic properties of concrete [J], 2020, (8) : 4953 [6] SidneyMindess [8] XuXinSheng, XuWeiSheng transition region. Concrete of concrete material [J], osmotic influence of shandong building materials, 1999, (3) : 1013 1 [4] SunRongGuang, YuRui, XuanDongXing, the water and the mud. Old water high temperature treatment rehydration gelling properties research [J]. Journal of wuhan university of technology, 2020, (9) : 115118 Frame shape structure of silicate structure in 400 ℃ water is only around large emerge. The minerals in different structure gesso bination of different degree, the dehydration temperature is different. Structure bination of water is mineral water, the most jail dehydration temperature is higher, typically in 450 ℃ above just dehydration [5]. In order to determine the low temperature calcining temperature waste concrete, guarantee the temperature conditions in slurry aggregates, and can be fully separation, cement stone pletely dehydration, this topic to the slurry thermogravimetric analysis (TGA), thermogravimetric curve and (TG) and differential thermal curve (DTG) as shown in figure 1 below. Temperature（℃） Slurry thermogravimetric analysis curves From figure 1 in 100 ℃ , water slurry before an obvious weightlessness, respectively, in theory should be losing process of free water and weak adsorption water by the formation of the process. In 500 ℃ ago and have an obvious of weightlessness process, this weightlessness process temperature range is narrower, but weightlessness faster, the position of the cement watch from shall be the Ca (OH) 2 water loss formation. Another cement stone anhydration process occurs in 682 ~ 775 ℃ between, dehydration rate occurred in 740 ℃ peak. This process a severe dehydration process, continues for a long time, the water loss process makes C S H gel deposition, born again into a potential hydration activity of cementitious material. Temperature continues to rise again until 1000 ℃ , has no obvious heatsink peak appearing. In addition, temperature rise again crossing may influence the structure of concrete aggregate. Therefore, concrete depositio n temperature determine
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