01157618

Component

https://doi.org/10.3141/2142-03

http://scholar.google.com...mins&publication_year=2010

Reactive powder concretes (RPCs) were developed through careful design and control of the composite microstructure. Enhanced properties were achieved through optimization of the gradation and arrangement of the inert particles, as well as through designing the reactive components (e.g., coarse-ground oil-well cement and silica fume) to govern the hydration product morphology. Recently, a process has been developed for synthesis of cement with nanometer-scale particle sizes with tailorable chemical compositions. The addition of nanocements to RPCs is unique because it influences the early hydration reaction of the cement in RPC for nano-sized hydration products. The replacement of a small fraction of the conventional cement with these nano-sized reactive particles reduces the induction period in cement hydration and initiates a faster conversion to the hydration products. Integration of nanocements may also lead to a denser product microstructure with higher ultimate compressive and tensile strengths. Potential also exists to reduce the permeability of the RPC and to strengthen the interfacial transition zones within the material. With such improvements, nanocement can serve as a means to optimize RPC systems for enhanced properties and may further enhance the durability of RPC.

01157601

NANO10-0039

English

pp 18-24

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309142779

Print

Figures (8) ; References (10) ; Tables (3)

Cement; Compressive strength; Durability; Hydration; Microstructure; Nanostructured materials; Permeability; Silica fume; Tensile strength

Interfacial transition zone; Reactive powder concrete

Materials; I32: Concrete

TRIS, TRB, ATRI

May 26 2010 2:27PM

• American Road Map for Research for Nanotechnology-Based Concrete Materials
• Carbon Nanofiber–Reinforced Cement-Based Materials
• Direct Synthesis of Carbon Nanofibers on Cement Particles
• Distribution of Carbon Nanofibers and Nanotubes in Cementitious Composites
• Exploratory Investigation of Nanomaterials to Improve Strength and Permeability of Concrete
• Laboratory Assessment of a Self-Healing Cementitious Composite
• Modeling Nanoindentation of Calcium Silicate Hydrate
• Molecular Dynamics Study of Interaction Between Corrosion Inhibitors, Nanoparticles, and Other Minerals in Hydrated Cement
• Molecular Dynamics to Understand the Mechanical Behavior of Cement Paste
• Nanocellulose and Microcellulose Fibers for Concrete
• Nanoengineering Ultra-High-Performance Concrete with Multiwalled Carbon Nanotubes
• Nanotechnology and Concrete: Concepts and Approach
• Nanotechnology to Manipulate the Aggregate–Cement Paste Bond Effects on Mortar Performance
• New Calcium Silicate Hydrate Network
• New Possibilities and Future Pathways of Nanoporous Thin Film Technology to Improve Concrete Performance
• Performance of Carbon Nanofiber–Cement Composites with a High-Range Water Reducer
• Scanning Transmission X-Ray Microscopic Study of Carbonated Calcium Silicate Hydrate
• Stability of Synthetic Calcium Silicate Hydrate Gels in Presence of Alkalis, Aluminum, and Soluble Silica
• Strength Enhancement of Cement Mortar with Carbon Nanotubes: Early Results and Potential