外文翻译---废弃混凝土再生新技术探索(编辑修改稿)

外文翻译---废弃混凝土再生新技术探索(编辑修改稿)内容摘要：

there is some difference in density low, bibulous rate is high, crush index is big, show the gap regeneration aggregate rate high, low intensity, and it is mainly because the surface adhesion has large cement mortar and crushing process in certain micro cracks of introducing the sake [2] and generated concrete performance low, durability, freezingthawing resisting, corrosion resistance is poor. The researchers based on renewable aggregate reuse the problems existing in the process of recycled aggregate, carried on the physical and chemical modification and plastic modification. As such ZhuChong performance by plastic to remove the mortar, renewable aggregate surface water that particles, smooth, prepared by reducing shrinkage of concrete lower, but still higher than the natural aggregate concrete [3]. Not solve the regeneration aggregate micro cracks in the malpractices. Currently have researchers of the waste prehensive utilization of concrete research, through the screening get bonding mortar or progress screening production of renewable cement hydration activity with. If SunRongGuang etc [4] to the old cement. after high temperature treatment of slurry rehydration characteristics study gel, it is concluded that renewable cement with a rehydration ability, while generating C S H gel, Aft and CH that hydration products such material, but same structure dehydrated phases because of the existence of hydration speed to. YuRui etc [5] for water mud through the research that fly ash and position modifier gypsum slurry can extend the initial setting activation time and strengthen the pressive strength, however does not reduce activation of standard slurry water viscosity. Due to easy hydration of cement stone dehydration need time, so calcining time 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 1 cement hydration products dehydration temperature Literature in minerals that water cut the dehydration temperature ordinary adsorption water for 100 ~ 110 ℃ monly, exists in layer silicate structure between layers of the colloid water or colloid mineral water in 200 ~ 300 much ℃ in within dehydration, individual ℃ 400 within dehydration。 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 differe。