Properties of early age concrete - Experiments and modelling

10.1617/13796 ◽  
2002 ◽  
Vol 35 (246) ◽  
pp. 76-79 ◽  
Author(s):  
A. Gutsch
Keyword(s):  
Early Age ◽  
Early Age Concrete

Very early age concrete hydration characterization monitoring using piezoceramic based smart aggregates

2013 ◽  
Vol 22 (8) ◽  
pp. 085025 ◽  
Author(s):  
Qingzhao Kong ◽  
Shuang Hou ◽  
Qing Ji ◽  
Y L Mo ◽  
Gangbing Song
Keyword(s):  
Early Age ◽  
Concrete Hydration ◽  
Early Age Concrete

scholarly journals Characterization of Moisture Diffusion in Cured Concrete Slabs at Early Ages

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xiao Zhang ◽  
Hongduo Zhao
Keyword(s):  
Process Model ◽  
Model Simulation ◽  
Moisture Diffusion ◽  
Experimental Results ◽  
Concrete Slabs ◽  
Model Parameters ◽  
Early Age ◽  
Water Curing ◽  
Early Age Concrete

The objective of this paper is to investigate the characterization of moisture diffusion inside early-age concrete slabs subjected to curing. Time-dependent relative humidity (RH) distributions of three mixture proportions subjected to three different curing methods (i.e., air curing, water curing, and membrane-forming compounds curing) and sealed condition were measured for 28 days. A one-dimensional nonlinear moisture diffusion partial differential equation (PDE) based on Fick’s second law, which incorporates the effect of curing in the Dirichlet boundary condition using a concept of curing factor, is developed to simulate the diffusion process. Model parameters are calibrated by a genetic algorithm (GA). Experimental results show that the RH reducing rate inside concrete under air curing is greater than the rates under membrane-forming compound curing and water curing. It is shown that the effect of water-to-cement (w/c) ratio on self-desiccation is significant. Lower w/c ratio tends to result in larger RH reduction. RH reduction considering both effect of diffusion and self-desiccation in early-age concrete is not sensitive to w/c ratio, but to curing method. Comparison between model simulation and experimental results indicates that the improved model is able to reflect the effect of curing on moisture diffusion in early-age concrete slabs.

scholarly journals Monitoring of the ultrasonicP-wave velocity in early-age concrete using Smart Aggregates

2012 ◽  
Vol 1 ◽  
pp. 01001 ◽  
Author(s):  
Cédric Dumoulin ◽  
Grigoris Karaiskos ◽  
Jérôme Carette ◽  
Stéphanie Staquet ◽  
Arnaud Deraemaeker
Keyword(s):  
Wave Velocity ◽  
Early Age ◽  
Early Age Concrete

scholarly journals Evaluation of Early-Age Concrete Compressive Strength with Ultrasonic Sensors

Sensors ◽  
2017 ◽  
Vol 17 (8) ◽  
pp. 1817 ◽  
Author(s):  
Hyejin Yoon ◽  
Young Kim ◽  
Hee Kim ◽  
Jun Kang ◽  
Hyun-Moo Koh
Keyword(s):  
Compressive Strength ◽  
Early Age ◽  
Concrete Compressive Strength ◽  
Ultrasonic Sensors ◽  
Early Age Concrete
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