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首页> 外文期刊>Zeitschrift fur Arznei- und Gewurzpflanzen >Development of lightweight aggregates from crushing of ornamental stones (granites and marbles) and clay
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Development of lightweight aggregates from crushing of ornamental stones (granites and marbles) and clay

机译：从破碎装饰石（花岗岩和大理石）和粘土的轻质聚集体的发展

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摘要

Lightweight aggregates are granular materials with porous structure used as thermal and acoustic insulation, decoration in landscaping, the production of light fillings, drainage works, light landfills and infrastructure, as well as hydroponics. Manufactured from clayey precursors, sintered at high temperatures, which expand due to a glassy phase to capture the gases generated, being the flux content and substances that form gases, intervening factors of the process. In this context, it was verified the possibility of using granite and marble cutting waste (GMCW) and clay with the objective of developing lightweight aggregates. The precursors were characterized as surface area (BET), laser granulometry, fineness, specific gravity and bulk density in addition to thermal (ADT/TG), chemical (XRF) and mineralogical (XRD) analyzes. Aggregates with 0, 50, 60, 70, 80, 90, and 100% GMCW contents were produced by sintering at temperatures of 1000 degrees C to 1263 degrees C in a muffle furnace. The sintered mixtures were analyzed for their particle density, water absorption, bulk density, modulus of deformation of the lightweight aggregates, swelling index, mass loss, dry shrink index, visual analysis, tensile strength and morphology by scanning electron microscopy (SEM). After sintering, aggregates with particle density less than 2,00g/cm(3), water absorption less than 20% and bulk density less than 0,88g/cm(3) were obtained, these values being defined as requirements for classifying an aggregate as light and qualified for use in structural concrete. As for the highlighted properties, it was possible to develop lightweight aggregates with high waste content that meet the normative requirements, respectively, with values of 1,56g/cm(3), 8% and 0,85g/cm(3), in addition to lightweight aggregates presenting tensile strength fourfold higher than the commercial lightweight aggregate.
机译：轻质聚集体是具有多孔结构的粒状材料，用作热和声学绝缘，景观装饰，光填充的生产，排水作品，灯填埋场和基础设施，以及水栽机。由粘土前体制造，在高温下烧结，该高温膨胀，由于玻璃相捕获产生的气体，是形成气体的助焊剂含量和物质，过程中的介入因素。在这种情况下，验证了使用花岗岩和大理石切割废物（GMCW）和粘土的可能性，其目的是开发轻质聚集体。除了热（ADT / TG），化学（XRF）和矿物学（XRD）分析外，前体还表征为表面积（BET），激光粒度，细度，细度，比重和堆积密度。通过在Muffle炉中在1000℃至1263摄氏度的温度下烧结，产生0,50,60,70,80,90和100％GMCW内容物的聚集体。分析烧结混合物的颗粒密度，吸水，堆积密度，轻质聚集体的变形模量，通过扫描电子显微镜（SEM）通过溶胀聚集体，溶胀指数，质量损失，干扰指数，视觉分析，拉伸强度和形态。烧结后，颗粒密度小于2,00g / cm（3），获得小于20％的吸水率，并且堆积密度小于0,88g / cm（3），这些值被定义为对骨料分类的要求作为光线和合格用于结构混凝土。对于突出的性质，可以分别开发具有高废料含量的轻质聚集体，分别符合规范性要求，其值为1,56g / cm（3），8％和0,85g / cm（3），除了轻质的聚集体，呈现抗拉强度的四倍高于商业轻质聚集体。

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