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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Properties of Self-leveling Concrete: Influence of a Viscosity Agent and Cement Content
Author(s): J. Ambroise and J. Pera
Publication: Special Publication
Appears on pages(s): 367-380
Keywords: bleeding; compressive strength; segregation; self-level-ing
concrete; starch; viscosity agent; workability
Abstract:This paper deals with the development of self-levelling concrete at low cost for casting slabs and other horizontal structures. The 28-day compressive strength of such concrete is in the range of 25 to 40 MPa, and its cost is 15 % higher than that of usual concrete. This overcost is offset by some advantages: quicker execution, absence of noisy vibration at job-site and reduced painful task for workers. The cement content for this concrete ranges from 260 to 380 kg/m’, and that of limestone powder from 20 to 140 kg/m3, in order to get a total amount of fine particles of 400 kg/m3. To prevent segregation, a viscosity agent - a suspension of modified starch - was introduced in the mixture at different contents. The following characteristics were measured: static spread of concrete, unit weight, bleeding, resistance to segregation, compressive strength, elastic modulus and shrinkage. The results show that the optimum dosage of viscosity agent is 2 kg/m3, regardless of the amount of cement.
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