An Optimized Superplasticized Microsilica Concrete for Flexible Highway Pavement
Authors: Akiije I, Adebiyi TA
DOI Info: http://doi.org/10.5281/zenodo.5048414
Microsilica is a by-product of silicon from an electric arc furnace. Mitigating the consequences of microsilica effect, lead to using same in concrete production to better highway pavements. In this study, microsilica has been used with Conplast SP 430 superplasticizer to produce high strength superplasticized microsilica concrete whilst employing lagoon and river sands independently. Using 3:1 aggregates cement relationship for lagoon and river sands individually, a normal and three types of superplasticized microsilica concretes (SMC) were produced. From each type of concrete produced, cube models were made to simulate rigid pavement while I-shape, Z-shape and rectangular shape paver samples were made for flexible pavement. For the superplasticized microsilica concrete produced, the amount of microsilica used was constant for each mix at 3% whereas superplasticizer used was varied as 1.5%, 2%, 2.5% and 3%. Under same condition of concrete mix of using river sand, it was SMC of 2.5% superplasticizer that gave highest value of compressive strength. However, SMC with 2% using lagoon sand gave higher values of compressive strength than those with 2.5% while using river sand.
Affiliations: Department of Civil and Environmental Engineering, Faculty Engineering, University of Lagos, Akoka-Yaba, Lagos, Nigeria.
Keywords: Compressive Strength, Concrete Cube, Concrete Paver, Lagoon Sand, Microsilica, River Sand, Superplasticizer
Published date: 2021/06/30