纤维增强玻璃离子体水泥的机械性能和离子释放
Anja Ivica1, Ivan Šalinović1, Silvana Jukić Krmek1
1Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia.
Polymers
|March 13, 2024
概括
将短玻璃纤维添加到树脂修饰的玻璃离子体水泥中,可以显著改善机械性能. 20%纤维配方显示出最好的结果,在30天内保持离子释放.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科材料 牙科材料
背景情况:
- 树脂改性玻璃离子体水泥 (RMGIC) 在牙科中广泛使用.
- 提高RMGIC机械性能对于改善临床性能至关重要.
- 纤维增强为增加材料强度提供了一个有希望的策略.
研究的目的:
- 评估短玻璃纤维添加对RMGIC机械性能的影响.
- 为了评估纤维增强RMGIC的离子释放 (化物和).
- 将纤维增强RMGIC与商业控制材料进行比较.
主要方法:
- 准备了三个实验组,使用10%,15%和20%的短玻璃纤维.
- 测试了机械性能 (微硬度,断裂性,,压力,直径拉伸强度).
- 使用选择性电极测量离子释放的时间为24小时,7天和30天.
主要成果:
- 增加至20%的纤维含量显著改善了微硬度,屈曲强度,直径拉伸强度和断裂性 (p < 0.05).
- 在24小时和7天的对照组中,化物释放量更高 (p < 0.001),但在30天后没有发现显著差异.
- 在任何时间点 (p > 0.05) 中,释放量在各组之间没有显著差异.
- 扫描电子显微镜证实了同质的纤维分布.
结论:
- 短玻璃纤维的20%重量负载优化了RMGIC的机械性能.
- 纤维增强不会阻碍30天内必需离子的释放.
- 这种增强的RMGIC配方为需要卓越机械强度的牙科应用提供了有希望的替代方案.
更多相关视频
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
378
11:07Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
11.1K
相关概念视频
Fiber Reinforced Concrete
76
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...
76
Strength of Cement
133
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
133
Mortar Properties
123
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...
123
Ferrocement
171
Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
171
Soundness of Cement
167
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
167
Strength and Heat of Hydration
236
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
236
