Development of New Grout Mix Using Kota Stone Slurry for Sustainable Development

Grouting in civil engineering refers to the injection of pumpable materials into soil or rock formation to enhance its physical characteristics. The present study investigates the sustainable use of Kota stone waste in powder slurry form as a partial replacement of cement in a grout mix. Kota stone is a fine-grained variety of limestone, quarried at Kota district, Rajasthan, India. The objective of the present study is to develop a grout mix using Kota stone powder slurry based on its strength parameters. 1:6 mortar was used for sample preparation with water–cement ratio of 0.8 decided by flow table test. Compressive strength tests on cubes of size 50 mm were conducted at 7 and 28 days as per the Indian standards. The desired strength for cubes was taken as 9 MPa. The experimental program consisted of preparing grout mixes with Kota stone powder slurry with partial replacement of cement by 5, 10, 15 and 20%. Results indicated that the cement up to 10% could be replaced without any loss in strength of grout mix. The study concludes that Kota stone slurry waste is a perfect alternative for partial replacement of cement, which is produced every year in abundance.