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Effect of water storage time on frost resistance of concrete

Fridh, Katja LU and Fagerlund, Göran LU (1999) International Conference on Durability of Building Materials and Components (8DBMC) In Durability of Building Materials and Components 8 : Proceedings 1: Service life and durability of materials and components. p.212-221
Abstract
In high performance concrete (HPC) with low water-cement ratio, cement reaction will cause substantial drying expressed in terms of relative humidity (RH) of the pore water. This phenomenon is called self-desiccation. The RH-values as low as 85% have been measured in dense concretes that have been stored for more than 18 months in water. This means that there is almost no freezable water in the concrete until very low temperatures are reached. It also means that freeze-thaw tests made with young concrete might give results on the unsafe side. In this report some results from a bigger study of the effect of longterm water storage on the frost resistance of HPC are presented. The results show that previously self-desiccated concrete absorbs... (More)
In high performance concrete (HPC) with low water-cement ratio, cement reaction will cause substantial drying expressed in terms of relative humidity (RH) of the pore water. This phenomenon is called self-desiccation. The RH-values as low as 85% have been measured in dense concretes that have been stored for more than 18 months in water. This means that there is almost no freezable water in the concrete until very low temperatures are reached. It also means that freeze-thaw tests made with young concrete might give results on the unsafe side. In this report some results from a bigger study of the effect of longterm water storage on the frost resistance of HPC are presented. The results show that previously self-desiccated concrete absorbs water when it is stored for a long time in water. Dilation tests during freezing indicate that concrete that was frost resistant when tested during the first months might become non-frost resistant after a long period of water storage. This must be considered in the design of freeze-thaw test methods. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
frost resistance, water absorption, performance based building, sustainable construction, high-performance concrete (hpc), self-desiccation, w078, w080
in
Durability of Building Materials and Components 8 : Proceedings
editor
Lacasse, Michael A. and Varnier, Dana J.
volume
1: Service life and durability of materials and components
pages
212 - 221
publisher
NRC Research Press
conference name
International Conference on Durability of Building Materials and Components (8DBMC)
ISBN
0-660-17737-4
language
English
LU publication?
yes
id
2f88ffb5-f5df-4041-a6d5-2b109d2fca61 (old id 4195642)
alternative location
http://www.irbnet.de/daten/iconda/CIB1826.pdf
date added to LUP
2013-12-16 12:25:52
date last changed
2016-04-16 08:54:19
@misc{2f88ffb5-f5df-4041-a6d5-2b109d2fca61,
  abstract     = {In high performance concrete (HPC) with low water-cement ratio, cement reaction will cause substantial drying expressed in terms of relative humidity (RH) of the pore water. This phenomenon is called self-desiccation. The RH-values as low as 85% have been measured in dense concretes that have been stored for more than 18 months in water. This means that there is almost no freezable water in the concrete until very low temperatures are reached. It also means that freeze-thaw tests made with young concrete might give results on the unsafe side. In this report some results from a bigger study of the effect of longterm water storage on the frost resistance of HPC are presented. The results show that previously self-desiccated concrete absorbs water when it is stored for a long time in water. Dilation tests during freezing indicate that concrete that was frost resistant when tested during the first months might become non-frost resistant after a long period of water storage. This must be considered in the design of freeze-thaw test methods.},
  author       = {Fridh, Katja and Fagerlund, Göran},
  editor       = {Lacasse, Michael A. and Varnier, Dana J.},
  isbn         = {0-660-17737-4},
  keyword      = {frost resistance,water absorption,performance based building,sustainable construction,high-performance concrete (hpc),self-desiccation,w078,w080},
  language     = {eng},
  pages        = {212--221},
  publisher    = {ARRAY(0x5d29e98)},
  series       = {Durability of Building Materials and Components 8 : Proceedings},
  title        = {Effect of water storage time on frost resistance of concrete},
  volume       = {1: Service life and durability of materials and components},
  year         = {1999},
}