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Updated: Jun 14, 2025

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
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使用纳米SiO和PVA纤维优化高容量的飞灰砂:性能和微观结构

Junliang Zhao1,2, Zhongkun Wang1,2, Gengying Li3

  • 1College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, China.

Nanomaterials (Basel, Switzerland)
|June 11, 2025
PubMed
概括

添加纳米二氧化 (NS) 和聚乙醇 (PVA) 纤维显著提高了机械性能和耐用性. 这些材料减少了水的吸收和干燥收缩,改善了砂的整体性能.

关键词:
这是一种PVA纤维.干燥 收缩 收缩 干燥大量的飞灰砂砂.机械性能 机械性能 机械性能纳米-SiO2 的使用.

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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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Porosity in Cement Paste

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
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Fineness of Cement

The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
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