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Updated: Jun 30, 2025

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
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在环境固化条件下使用飞灰地质聚合物稳定废弃物造厂砂的适用性

Ali Abdulhasan Khalaf1,2, Katalin Kopecskó1, Sarah Modhfar3

  • 1Department of Engineering and Geotechnics, Faculty of Civil Engineering, Budapest University of Technology and Economics, Muegyetem Rakpart 3, H-1111, Budapest, Hungary.

Heliyon
|March 21, 2024
PubMed
概括

用飞灰地质聚合物稳定废弃造业沙子显示出对道路基础的承诺. 环境固化提高了可行性,25%的飞灰达到地质技术应用所需的强度.

关键词:
环境固化 环境固化飞行灰的飞行灰地质聚合物的地质聚合物.稳定了 稳定了废弃的造业的沙子.

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Pozzolans

Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
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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.
Another type of impurity is clay and fine material that...
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Types of Cement II

Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
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Design Example: Managing Concrete Workability

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The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
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