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Understanding the Dispersion Mechanisms of Nanosilica in Ultra High Performance Concrete
One of the current challenges to nanoengineering cementitious composite materials is obtaining proper dispersion of nano-sized particles in the cementitious composite matrix. Proper dispersion of particles can lead to improved particle packing density, a key parameter in improving the mechanical, chemical, and sustainable properties of the cementitious composite. Current advances in optimizing particle packing density have led to the development of higher strength, higher durable cementitious composite materials, such as ultra-high performance concrete (UHPC). Further advancement of UHPC can be achieved by the addition of properly dispersed nano-sized particles which will assist in broadening the particle size distribution for further optimization of the particle packing density. Among the vast variety of potential nano-particles, nanosilica is the most studied to date. Nanosilica has been shown to improve macroscopic properties such as mechanical strength, durability, and chemical resistivity of cementitious materials. However, as the average particle diameter size decreases the water demand increases and challenges a balanced mix design. More fundamental work needs to be done in order to understand how nanosilica disperses inside the hydrating matrix. Our research investigations will focus on the interfacial interactions between nanosilica and the hydration products, the ions of the pore solution, and the polymers of admixtures.
Understanding the Dispersion Mechanisms of Nanosilica in Ultra High Performance Concrete
One of the current challenges to nanoengineering cementitious composite materials is obtaining proper dispersion of nano-sized particles in the cementitious composite matrix. Proper dispersion of particles can lead to improved particle packing density, a key parameter in improving the mechanical, chemical, and sustainable properties of the cementitious composite. Current advances in optimizing particle packing density have led to the development of higher strength, higher durable cementitious composite materials, such as ultra-high performance concrete (UHPC). Further advancement of UHPC can be achieved by the addition of properly dispersed nano-sized particles which will assist in broadening the particle size distribution for further optimization of the particle packing density. Among the vast variety of potential nano-particles, nanosilica is the most studied to date. Nanosilica has been shown to improve macroscopic properties such as mechanical strength, durability, and chemical resistivity of cementitious materials. However, as the average particle diameter size decreases the water demand increases and challenges a balanced mix design. More fundamental work needs to be done in order to understand how nanosilica disperses inside the hydrating matrix. Our research investigations will focus on the interfacial interactions between nanosilica and the hydration products, the ions of the pore solution, and the polymers of admixtures.
Understanding the Dispersion Mechanisms of Nanosilica in Ultra High Performance Concrete
Sobolev, Konstantin (Herausgeber:in) / Shah, Surendra P. (Herausgeber:in) / Vandenberg, Aileen (Autor:in) / Wille, Kay (Autor:in)
Nanotechnology in Construction ; Kapitel: 40 ; 311-316
01.01.2015
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
One nanoengineering , Cement , Composite , Nanoparticles , Hydration , Pore solution , Admixtures , Packing density , Strength , Ultra-high performance concrete , UHPC Engineering , Building Materials , Nanotechnology , Nanoscale Science and Technology , Structural Materials , Building Repair and Maintenance , Energy Efficiency , Physics and Astronomy
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