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相关概念视频

Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

64
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
64
Reinforcements in Concrete01:25

Reinforcements in Concrete

66
Reinforced concrete is a composite material used extensively in construction, combining the compressive strength of concrete with the tensile strength of steel. This synergy is essential as concrete, while excellent at resisting compression, is weak under tension. Steel bars, or rebars, are embedded in the concrete to handle these tensile forces. The choice of steel is strategic; it shares a similar coefficient of thermal expansion with concrete, which ensures uniformity in response to...
66
Composite Masonry Walls01:18

Composite Masonry Walls

557
Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
557
Mortar Properties01:17

Mortar Properties

103
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
103

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相关实验视频

Updated: May 20, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

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制定机械坚固的复合修复材料,以实现高性能.

Austyn Salazar1, Natalie Anderson1, Jeffrey Stansbury1,2

  • 1Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.

Journal of functional biomaterials
|March 26, 2025
PubMed
概括
此摘要是机器生成的。

使用新型四氨二烯酸盐 (TUDA) 的新型牙科复合材料显示出高反应性和机械强度. 这项研究增强了牙科修复材料,以提高临床性能和耐用性.

关键词:
(甲) 烯酸树脂的 (甲) 烯酸树脂的使用.复合牙科复合修复性牙科复合修复光聚合的光聚合方式.

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Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物材料科学 生物材料科学
  • 聚合物化学 聚合物化学

背景情况:

  • 牙科树脂复合材料是广泛使用的直接放置的修复材料.
  • 提高光聚合效率和树脂矩阵的机械性能仍然是一个挑战.
  • 新型单体和聚合物网络构成可以提高复合材料的性能.

研究的目的:

  • 开发强大的牙科复合材料,使用具有新型尿连接配置和酸性共体的四甲二烯酸盐 (TUDA).
  • 通过反应动力学和机械测试来验证这些新配方的性能.
  • 在添加填充剂之前,优化树脂配方的高反应性和机械性能.

主要方法:

  • 使用反应动力学和三点曲测试的探索性方法.
  • 测量转化和机械性能以精制配方.
  • 将西兰处理的颗粒填充剂纳入优化树脂配方中.

主要成果:

  • 最初的配方显示出优异的干燥机械性能,但耐水性较差.
  • 一项使用尿二烯酸盐 (UDA) 随后使用疏水性TUDA单体的模型研究改善了水分耐受性.
  • 最终配方中含有疏水性芳香性TUDA,4-甲基基甲基乙烯三化无水化物 (4-META),烯酸 (AA) 和甲基酸 (MAA) 显示出高反应性和机械性能.

结论:

  • 基于TUDA的新型配方可以显著增强牙科复合材料.
  • 优化的疏水性TUDA和酸性共纳体导致更高的反应性和机械性能.
  • 开发的配方为目前的牙科复合修复剂提供了一个有希望的替代品.