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Updated: Jun 13, 2025

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实验研究研究改性青混凝土使用纳米材料Al2O3,SiO2和TiO2的性能相关性质

Amjad H Albayati1, Nazar K Oukaili1, Mustafa M Moudhafar1

  • 1Department of Civil Engineering, University of Baghdad, Baghdad 17001, Iraq.

Materials (Basel, Switzerland)
|September 14, 2024
PubMed
概括

将纳米 (NS),纳米 (NA) 和纳米二氧化 (NT) 等纳米颗粒添加到青水泥中,可以显著提高路面的耐用性和耐磨性. 在特定纳米材料度下观察到最佳性能,改善了青的关键特性.

关键词:
疲劳 疲劳 疲劳 疲劳 疲劳 疲劳湿度损伤的损害纳米氧化是什么?纳米二氧化纳米二氧化纳米金纳米金永久变形的永久变形.

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Pozzolans01:21

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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Effects of Air-entrainment in Concrete

Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
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Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
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Accelerators01:17

Accelerators

Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
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Alkali Aggregate Reaction in Concrete

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