Lag effects of environmental temperature and relative humidity in concrete

Title: Lag effects of environmental temperature and relative humidity in concrete
Author(s): G. Li, Y. Yuan
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 526 - 533
Total Pages: 8
Nb references: 9
Language: English

The internal temperature (T) and relative humidity (RH) of concrete is significant to the corrosion rate of rebar in concrete. But there is obvious lag effect between the interior condition of concrete and the exterior environmental climate. Artificial climate chamber was used to study the lag effect on T and RH in different water/cement ratio (w/c) concrete in this paper. The test shows RH lag effect in concrete is more serious than T lag effect in concrete. About 5~6 hours are needed for building the interior and exterior temperature equilibrium at 45mm depth in concrete. But more than 10~15 days are needed for building the equilibrium at 50mm depth in concrete. Pore saturation degree (PS) of concrete is used to be expressed by RH in the concrete, and obviously affected not only by the environmental RH, but also by environmental T. w/c of concrete has smaller effect to the PS of concrete.

Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00

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