Production and Testing of Self-Levelling Concrete

The goal of this project was to develop self-levelling concrete at lower cost than traditional self-levelling concrete. The concrete of this study was only 20% more expensive than usual concrete utilized for building concrete. Laboratory and on-site data proved that this objective could be reached if the mixture contained: 260 kg/(m cubed) normal portland cement, 140 kg/(m cubed) powdered limestone, 10 kg/(m cubed) chemical admixture composed of a superplasticizer and a viscosity agent. The production of this concrete was followed for one year and the main engineering properties investigated. The 28-day strength was higher than 30 MPa and the water permeability was low, 10 to the minus twelve m/s. 8,000 m cubed of such concrete were placed within one year and suggested that self-levelling concrete could be an interesting solution to improve the productivity on-site and the quality of buildings.