Vol. 7, Issue 9 (2018)

Author(s):
Dr. Goutam Mukhopadhyay, Subhodip Das, Paulami Sengupta, Sanchita Mitra, Argho Sarkar, Shreya Banerjee, Sangita Roy Chowdhury and Debasmita Manna

Abstract:
The aim of this research article is show how the suspension property and compressive strength of clay grouting materials of coal mine gob is improved by using various raw materials in correct composition and ratio. Based on the ratio of raw materials (water-solid ratio) effective results can be drawn which provides the increasing and decreasing property of drainage rate and concretion rate. The experimental result shows that when water-solid ratio is increased, the drainage rate of clay grout is increased but concretion rate is decreased. The drainage rate of clay and compressive strength both are increased by adding cement and lime. The concretion rate is also shortened by adding cement and lime. When lime dosage is 6% and cement dosage is 12%, compressive strength of clay- cement-lime grouts reaches the peak and the compressive strength is well developed.