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New Understanding of Cement Hydration Mechanism through Electrical Resistivity Measurement and Microstructure Investigations
Publisher: American Society of Civil Engineers
Abstract: The new understanding for the hydration mechanism of cement has been achieved based on the noncontact electrical resistivity measurement. The cement hydration process is divided into dissolution, dynamic balance, setting, ...
<i>INNOVATIONS FORUM:</i> Application of Extrusion for Manufacture of Short Fiber Reinforced Cementitious Composite
Publisher: American Society of Civil Engineers
Characterizing Rheology of Fresh Short Fiber Reinforced Cementitious Composite through Capillary Extrusion
Publisher: American Society of Civil Engineers
Abstract: The rheology behavior of fresh short fiber reinforced cementitious composite (SFRCC) for extrusion purpose was investigated through capillary extrusion. It was found that the classical capillary theory for single-phase ...
Early Hydration Process of Portland Cement Paste by Electrical Measurement
Publisher: American Society of Civil Engineers
Abstract: An electrical measurement technique was used to measure the electrical resistivity of cement paste having varying water/cement (w/c) ratios, and consequently the paste properties and characteristics were analyzed. The ...
Application of GEM Equation in Microstructure Characterization of Cement-Based Materials
Publisher: American Society of Civil Engineers
Abstract: This study proposes an analytical model to relate the evolving microstructure of neat cement paste during hydration to the electrical resistivity measurement. The model is based on the general effective media theory and ...
Influence of Slag as Additive on Compressive Strength of Fly Ash-Based Geopolymer
Publisher: American Society of Civil Engineers
Abstract: Slag was utilized as an additive for fly ash-based geopolymers in this study. It was found that the incorporation of slag could significantly increase the compressive strength of the geopolymer. The compressive strength ...
Molecular Dynamics Study of Water and Ions Transported during the Nanopore Calcium Silicate Phase: Case Study of Jennite
Publisher: American Society of Civil Engineers
Abstract: Durability is an important property that determines the long-term behavior of cement-based materials. Water and ions are transported in nanopores of calcium-silicate-hydrate (C-S-H) gels, the main element in cement-based ...
Effects of Mineral Admixture on Properties of Young Concrete
Publisher: American Society of Civil Engineers
Abstract: This paper reports the results of experimental study on the effects of mineral admixtures such as silica fume, slag, fly ash, and metakaolin, on the mechanical behavior of young concrete under either uniaxial compression ...
Upsetting Tests of Fresh Cementitious Composites for Extrusion
Publisher: American Society of Civil Engineers
Abstract: Upsetting tests were conducted on cylindrical specimens made of a typical fresh short fiber-reinforced cementitious composite (SFRCC) paste for extrusion at various boundary conditions to derive the paste’s constitutive ...
Numerical Simulations of Upsetting Process of the Fresh Fiber-Cement Paste
Publisher: American Society of Civil Engineers
Abstract: In this paper, first, the technical aspects for applications of finite-element method (FEM) in modeling material forming processes are reviewed, with a final determination of employing the solid formulation explicit finite ...