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Updated: May 28, 2025

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
11:07

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

Published on: June 27, 2018

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关于高飞含量的宏观性质和微观结构的研究 活性飞渣混凝土在室温固化

Zhu Yuan1, Yanmin Jia1, Xuanben Xie2

  • 1School of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, China.

Materials (Basel, Switzerland)
|February 13, 2025
PubMed
概括

活性飞灰渣混凝土 (AAFSC) 为传统混凝土提供了一个可持续的替代方案. 与水泥混凝土相比,这种环保材料表现出优越的28天强度和出色的不透性.

关键词:
酸活性飞灰渣混凝土泥渣混凝土泥渣高飞灰含量的飞灰含量.不透性性能 不透性性能微观结构的微观结构在室温下固化.水吸收曲线的水吸收曲线

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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent11:14

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

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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.
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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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Design Example: Managing Concrete Workability

This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
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