Influence of cementitious additions on the saturation point of superplasticizer

Author(s): M. Lanez, M. N Oudjit, A. Bali
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 257 - 263
Total Pages: 7
Language: English

Abstract: 
The main difficulty encountered in the formulation of concrete incorporating super plasticizers, is the measurement of the couple (cement, super plasticizer) which allows, while ensuring good workability during placing, to obtain a maximum reduction of the amount of mixing water.
The paper deals with the measurement of the saturation point of composed cement grouts with the help of Marsh cone. Saturation point corresponds to the minimum super plasticizer content compatible with the used cement.
The obtained results show that the flow time and the saturation point vary according to the constituents and the nature of the tested grouts. Moreover, the use of the dosage corresponding to the saturation point, through the good dispersion of the grains of the binder, results in increased mechanical strengths of the concrete.
Although the substitution of a fraction of cement by silica residues (ground slag and dune sand) allows a reduction of the consumption of super plasticizer which meets the economic and environmental requirements, improves always the rheological and mechanical behavior of concrete.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00