Effects of superplasticizer and antifreeze additives on strength and permeability properties of pervious concrete based on experiments

Document Type : Research Paper

Authors

1 Department of Civil Engineering, Faculty of Engineering, Ayatollah Al-Azimi University of Boroujerdi, Boroujerd, Iran

2 International Institute of Seismology and Earthquake Engineering, Tehran, Iran

3 Department of Civil Engineering, Faculty of Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran

Abstract

Pervious concrete being a particular type of high porosity concrete, is mainly used for pavement purposes. Pervious concrete is usually free of fine aggregates and the coarse aggregates are only coated by the cement matrix. The use of additives including superplasticizer and the consequent effects on engineering characteristics of pervious concrete is outlined in this study. The pervious concrete should be designed in such a way to resist against deterioration during the freezing and thawing cycles, while keeping the permeability index within reasonable limits. In this study, six sets of pervious concrete samples including three granular aggregates in both water to cement (W/C) and aggregate to cement (G/C) of typical pervious concrete samples containing lubricating additives and antifreeze. It was produced by measuring the efficiency, density, porosity and compressive strength in two main characteristics of this concrete, namely compressive strength and porosity, to the following results. According to the results of the study, the compressive strength of the pervious concrete was increased by about 9 MPa, and the porosity decreased at most by 15%.

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