Imperial College London
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Professor Nick Buenfeld

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Concrete Structures
 
 
 
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Contact

 

n.buenfeld Website

 
 
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Location

 

228BSkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wu:2017:10.1016/j.cemconres.2017.04.006,
author = {Wu, Z and Wong, HS and Buenfeld, NR},
doi = {10.1016/j.cemconres.2017.04.006},
journal = {Cement and Concrete Research},
pages = {136--154},
title = {Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking},
url = {http://dx.doi.org/10.1016/j.cemconres.2017.04.006},
volume = {98},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Drying and wetting induce a number of microstructural changes that could impact transport properties and durability of concrete structures, but their significance is not well-established. This research examines pastes, mortars and concretes with different w/b ratios, binders, aggregate sizes, curing and conditioning regimes. 50 mm thick samples were dried to equilibrium at either 105 °C, 50 °C/7% RH, 21 °C/33% RH or gentle stepwise at 21 °C/93% RH → 3% RH, and then rewetted stepwise by humidification at 21 °C/33% RH → 86% RH and full saturation to produce varying degrees of damage and moisture content. Oxygen diffusivity and permeability, electrical conductivity, microcracking, accessible and total porosity were measured at different conditioning stages over 3-year period to better understand the effects of shrinkage, hysteresis and drying-induced damage on transport properties. The effect of supplementary cementitious materials (GGBS, SF) and implications of drying-wetting on concrete durability are discussed.
AU  - Wu,Z
AU  - Wong,HS
AU  - Buenfeld,NR
DO  - 10.1016/j.cemconres.2017.04.006
EP  - 154
PY  - 2017///
SN  - 0008-8846
SP  - 136
TI  - Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking
T2  - Cement and Concrete Research
UR  - http://dx.doi.org/10.1016/j.cemconres.2017.04.006
UR  - https://www.sciencedirect.com/science/article/pii/S0008884616311322
UR  - http://hdl.handle.net/10044/1/48134
VL  - 98
ER  -
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