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Manufacturing and properties of composite material from demolition debris, plaster waste, and lime production waste to decrease ecological problems of cities
The International Journal of Advanced Manufacturing Technology ( IF 3.4 ) Pub Date : 2021-06-08 , DOI: 10.1007/s00170-021-07306-w
Vsevolod Mymrin , Carlos E. Waltrick , Kirill Alekseev , Monica A. Avanci , Paulo H. B. Rolim , Claudia R. Bernardi , Vitor Baldin

The main goals of this study were the development of new composites of construction materials from three types of construction industry wastes: construction and demolition debris, plaster waste, and lime production waste; determination of the physical-chemical processes of new composites structure formation. The study was using the methods of X-ray powder diffraction, scanning electron microscopy, energy dispersive spectroscopy, and laser micro-mass analyses. The strength of the test samples on the 180th day reached 16.7 MPa, the coefficient of linear expansion during hydration and hardening of the test samples till 1.81%, the water absorption 14.9%, and the apparent density till 1.95 g/cm3. The processes of structure formation showed hardening of the materials due to alkaline dissolving of the surfaces of solid particles, followed by chemical interaction of these alkaline solutions, with the synthesis of predominantly amorphous new sol-gel formations of the CSH group and of carbonates; over time, these new gel formations are transformed into a stony state.



中文翻译:

以拆除垃圾、石膏废料和石灰生产废料为原料的复合材料的制造和性能,以减少城市的生态问题

本研究的主要目标是利用三种建筑行业废料开发新型建筑材料复合材料:建筑和拆除垃圾、石膏废料和石灰生产废料;确定新复合材料结构形成的物理化学过程。该研究使用了 X 射线粉末衍射、扫描电子显微镜、能量色散光谱和激光微质量分析等方法。第180天试样强度达到16.7MPa,试样水化硬化线膨胀系数为1.81%,吸水率为14.9%,表观密度为1.95g/cm 3. 结构形成过程表明,由于固体颗粒表面的碱性溶解,材料硬化,随后这些碱性溶液发生化学相互作用,主要合成 CSH 基团和碳酸盐的无定形新溶胶-凝胶结构;随着时间的推移,这些新的凝胶形成转变为石质状态。

更新日期:2021-06-08
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