Acid and Sulphate Resistance of Limestone Blended Pervious Concrete

Volume 9 Issue 2 March - May 2019

Research Paper

Acid and Sulphate Resistance of Limestone Blended Pervious Concrete

Rekha Singh*, Sanjay Goel**

* Research Scholar, Department of Civil Engineering, I.K.G Punjab Technical University, Jalandhar, Punjab, India.

** Assistant Professor, Department of Civil Engineering, DAV Institute of Engineering and Technology, Jalandhar, Punjab, India.

Singh, R., & Goel, S. (2019). Acid and Sulphate Resistance of Limestone Blended Pervious Concrete, i-manager's Journal on Civil Engineering, 9(2), 9-16. https://doi.org/10.26634/jce.9.2.15130

Abstract

This research study investigates the durability properties of pervious concrete mixture as porosity with interconnected network of pores causes a significant decrease in its strength and resistance against chemical and physical attacks. This study is focused on the degradation of cement base material submitted to sulphate and acid attack. The pH of the solution was controlled at 1 and variation in mass was monitored with respect to time. Durability tests in laboratory were performed to judge the performance of pervious concrete made by blended cement containing limestone powder, silica fume, and metakaolin. The testing program includes abrasion, sulphate, and acid resistance. The test results were compared to the theoretical hypotheses. Durability of pervious concrete exposed to sulphate and acid has been studied on specimen fully submerged in 5% sodium sulphate solution and 1% sulphuric acid solution respectively for 180 days. The study of partial replacement of cement by limestone blends shows that the ternary blends show good improvement against effect of sulphate and acid attack and presents good option of replacement as a substitution in pervious concrete. Due to densification of microstructure of cement paste in ternary blends, abrasion resistance is also improved.