Marble Powder Lab

CHAPTER 3 - METHODOLOGY

3.1 Determination of fineness of marble powder

The fineness of marble powder sample was found to be 2978 cm2/Kg on testing through Blaine’s Apparatus.

3.2 Checking filler effect of marble powder

Since fineness is the major factor affecting the filler effect, hence the marble powder is blended with cement by replacing cement percentage wise in the order of 0%, 5%, 10%, 15%, 20% and the fineness of these samples were determined by Blaine air permeability apparatus. The results of test are depicted below.

Table 3.1: Indicating Filler effect of Marble Powder.

Sr. no. % replacement of cement by MP Specific surface area by Blaine Apparatus

1 0% 2865 cm2/Kg

2 5% 2870 cm2/Kg

3 10% 2876 cm2/Kg

4 15% 2882 cm2/Kg

5 20% 2888 cm2/Kg

Modify this as w/c is 0.45. The

This due to the increase of packing density of particles of sand due to the very fine fillers which provide very less space for water between sand grains as compared to standard mixes. Tests performed on hardened concrete

3.8.1 Compressive, Flexural and Split tensile strength test

To observe the performance of concrete prepared by replacement of cement and sand by marble powder as well as addition of marble powder to the standard concrete these tests were performed.

For compressive strength cubes of dimensions 150mm×150mm×150mm were prepared. To check the repeatability of results three cubes of each mix were prepared and then tested for 7days and 28 days strength in compression testing machine.

For flexural strength beams of dimensions 150mm×150mm×700mm were prepared. To check the repeatability of results three beams of each mix were prepared and then tested for 28 days strength in universal testing machine.

For split tensile strength cylinders of diameter 150mm and height 300mm were prepared. To check the repeatability of results three cylinders of each mix were prepared and then tested for 28 days strength in compression testing