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Updated: Jun 19, 2025

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

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实施城市固体废物焚烧 (MSWI) 底层灰作为建筑聚合物的回收计划的机遇和挑战:计划性审查

Kate D Weiksnar1, Christopher C Ferraro2, Ramana Kari3

  • 1Department of Environmental Engineering Sciences, University of Florida, Gainesville, Florida , USA.

Journal of the Air & Waste Management Association (1995)
|July 24, 2024
PubMed
概括

回收城市固体废物焚烧 (MSWI) 底灰 (BA) 作为建筑聚合物在美国面临监管障碍. 一种新的混合方法和机构合作促进了其作为有益的重复使用材料的批准.

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Deleterious Substances in Aggregate

Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
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Aggregates Classification01:29

Aggregates Classification

Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
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Preplaced Aggregate Concrete

Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
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Pozzolans

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Design Example: Managing Concrete Workability

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