105. Relation between vacuum water absorption and porosity of self-compacting concrete

Title: 105. Relation between vacuum water absorption and porosity of self-compacting concrete
Author(s): K. Audenaert, G. De Schutter
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: 701 - 706
Total Pages: 6
Nb references: 5
Language: English

Abstract: Self compacting concrete (SCC) was developed in Japan in the 1980’s. The aim was to develop a concrete with a high flowability and a high resistance to segregation, so that it could be placed without vibration. In this way, durability problems related with badly vibrated concrete would be reduced.
The high flowability is obtained by the use of superplasticizers and a high amount of fine particles. Due to the presence of a high amount of fine particles, the pore structure is differing from the pore structure of traditional concrete.
In this paper vacuum water absorption tests, carried out on 16 SCC and 4 traditional concrete mixtures (TC), will be discussed. Four types of cement (portland cement and blast furnace slag cement), three types of filler (fly ash and two types of limestone filler with a different grading curve) and two types of coarse aggregate are used and the influence of the amount of powder and the amount of water is studied. The drying temperature was 40°C or 105°C, corresponding respectively with the temperature of evaporation of the free capillary water and the gelwater. These test results are compared with the calculated capillary porosity and gel porosity, leading to the conclusion that a good estimation is obtained.

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