132. New admixture-system for low-fines self-compacting concrete

Title: 132. New admixture-system for low-fines self-compacting concrete
Author(s): J. Roncero, M. Corradi, R.S. Khurana
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: 875 - 880
Total Pages: 6
Nb references: 7
Language: English

Abstract: The use of self-compacting concrete (SCC) as an "every-day’s concrete" is, nowadays, difficult especially in the case of the Ready-Mixed Concrete Industry. This is mainly due to the higher cost of this material, which, very often, is supplied with excess in the required mechanical performances with the aim of fulfilling the fresh requirements. On the other hand, the use of extra fines implies, sometimes, new silos and more quality control increasing, consequently, the production costs.
Along these lines, the development of new and more efficient Viscosity Modifying Agents (VMA) permits designing SCC with high stability and compressive strengths in the range of 25 to 35 MPa without incorporating extra fines to improve the cohesion of the concrete. These new molecules help to produce SCC having total fines content (cement + fines) lower than 350-370 kg/m3. The use of this new family of VMAs, along with new superplasticizers specially designed for SCC, leads to an improvement in the cost-effectiveness of the concrete, which can contribute to expand the use of SCC in the Ready-Mixed Concrete Industry.
Along these lines, the present work shows the results obtained using a new VMA compared to traditional ones. Additionally, the robustness of mixes has been evaluated.

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