60. The influence of temperature on self-compacting concrete in presence of superplasticizer and additional admixtures

Title: 60. The influence of temperature on self-compacting concrete in presence of superplasticizer and additional admixtures
Author(s): H.C. Kuehne, W. Schmidt, B. Meng
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 405 - 410
Total Pages: 6
Nb references: 11
Language: English

Abstract: Arising from the continuous gain in experience and steady technical improvement SCC has obtained more and more acceptance in the market. The driving factor for technical improvement thereby was mainly the development of new efficient admixtures. Modern selfcompacting concrete is usually a fine balanced composition of several chemical and mineral additives. However, rising complexity also increases the sensitivity to environmental impacts.
With this regard, the ambient temperature is probably most crucial.
In order to learn more about interactions between admixtures and concrete in connection to different environmental temperatures, a self-compacting mortar was modified with different admixture combinations, which were composed of a polycarboxylate superplasticizer, a viscosifying and a shrinkage reducing agent. On the one hand, the influence of admixtures on fresh concrete behaviour was analysed for different temperatures on the basis of rheological tests and hardened concrete properties. On the other hand, the impact of exposure of the concrete to differing temperatures during the early stage of curing was investigated.
Therefore, different environmental situations were simulated by varying the casting as well as the curing temperatures.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00