Effects of reinforcement on autogenous deformation of early-age concrete containing CaO-based expansion agent

2022 ◽  
Vol 320 ◽  
pp. 126197
Author(s):  
Haitao Zhao ◽  
Yu Xiang ◽  
Jiaping Liu ◽  
Zhiqiang Zhang ◽  
Ruiming Jia ◽  
...  
Keyword(s):  
Early Age ◽  
Autogenous Deformation ◽  
Early Age Concrete

Effects of pre-soaked zeolite and CaO-based expansive agent on mechanical properties and autogenous deformation of early-age concrete

2020 ◽  
Vol 261 ◽  
pp. 120370 ◽  
Author(s):  
Haitao Zhao ◽  
Jinghao Li ◽  
Gaoyang Sun ◽  
Jianhua Jiang ◽  
Weihong Xuan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Early Age ◽  
Expansive Agent ◽  
Autogenous Deformation ◽  
Early Age Concrete

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

Experimental study on bond properties between early-age concrete and deformed steel bars

2020 ◽  
Vol 236 ◽  
pp. 117593 ◽  
Author(s):  
Xiaopeng Hu ◽  
Gang Peng ◽  
Ditao Niu ◽  
Jing Wang
Keyword(s):  
Experimental Study ◽  
Early Age ◽  
Bond Properties ◽  
Steel Bars ◽  
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.

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