関連する実験動画
Updated: Jul 12, 2026

09:46
Accessing the Cytotoxicity and Cell Response to Biomaterials
Published on: July 8, 2021
まとめ
トリカルシウムシリケート (Ca3SiO5) の水分化におけるヒドロキシドカルシウム (Ca(OH) 2) の結晶は,低孔性のゾーンを形成する. 早期にこれらの結晶の周りに亀裂が広がり,Ca (OH) 2がクラックアレスターとして作用しますが,この効果は時間とともに減少します.
科学分野:
- マテリアルサイエンス 材料科学
- 化学工学は化学工学というものです.
- 土木工学 土木工学とは
背景:
- トリカルシウムシリケート (Ca3SiO5) の水分化は,セメント材料にとって根本的なものです.
- 水性セメントペーストの微細構造を理解することは,その機械的性質を予測するために非常に重要です.
- カルシウム水酸化物 (Ca (((OH)) 2) は,セメントペーストの特性に影響を与える重要な水分化製品です.
研究 の 目的:
- トリカルシウムシリケート (Ca3SiO5) ペーストの水分化トリカルシウムシリケート (Ca3SiO5) ペーストの骨折行動におけるカルシウム水酸化物 (Ca(OH) 2の役割を調査する.
- Ca (((OH)) 2結晶の形成を,多孔性および亀裂の拡散と相関させるため.
- 水分補給の増加とともに,骨折に対するCa(OH) 2の影響の進化を分析する.
主な方法:
- 水素化されたトリカルシウムシリケート (Ca3SiO5) ペーストの微細構造分析.
- カルシウム水酸化物 (Ca(OH) 2) の結晶形成に関連した孔性の評価.
- 裂け目の伝播経路を観察するための断裂力学試験.
主要な成果:
- 大きな結晶性カルシウム水酸化物 (Ca(OH) 2領域は,低孔性の領域に対応しています.
- 初期段階のペーストの多孔性は,カルシウムシリケート水素で結合された領域のCa(OH) 2結晶の間に集中しています.
- 破裂は,好ましくは,カルシウムシリケート水素結合と,クラックアレスターとして作用するCa (OH) 2結晶の周りに広がります.
結論:
- カルシウム水酸化物 (Ca(OH) 2) は,好ましい亀裂経路を作り,亀裂を止めることによって,トリカルシリケート (Ca3SiO5) ペーストの初期段階の骨折を著しく影響する.
- 骨折行動に対するCa(OH) 2の影響は,水分化の進行とともに減少する.
- 微細構造的特徴,特にCa (OH) 2の分布は,硬化セメントペーストの機械性能の決定的な決定要因である.
関連する概念動画
Hydration of Cement
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
Sulfate Attack on Concrete
Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
Sulfates from sources like soil, groundwater, or industrial effluents...
Sulfates from sources like soil, groundwater, or industrial effluents...
Strength and Heat of Hydration
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...
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.
The balance of water to cement in the mix is critical—it...
The balance of water to cement in the mix is critical—it...
Skeleton and Calcium Homeostasis
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
Roles of Electrolytes: Calcium and Phosphate
Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily regulated...
The calcium concentration in blood plasma is primarily regulated...

