Marble Mill Research Paper

CHAPTER 1 – INTRODUCTION

1.1 GENERAL

Now a day, the most widely used construction material is concrete, commonly made by mixing cement with sand, crushed rocks and water. Last year only in US 63 billion tons of Portland cement were converted into 500 billion tons of concrete, which is five times the consumption by weight of steel. In most of the countries the ratio of concrete consumption to steel consumption exceeds about ten to one. The total consumption of concrete is in the world is estimated at 11billion metric tons every year. Man consumes no material except water in such tremendous quantity.

Despite this fact, worldwide the concrete production is major concern that affects the environment with major impact being global warming due to

The Indian marble industry had grown steadily at an annual rate of around 10% per year.

The cutting of stones produces slurry, rock fragments and dust. About 20 to 30% of marble blocks are converted into powder. It was recorded that 3,172 thousand tons of marble dust was produced in year 2009-10.

Figure 1.1: Showing marble production in India (Source :- Amar Sharma, Gazala Habib & Vasant Matsagar “Reuse of Marble dust as fine aggregate in UHPC” Department of Civil Engineering, IIT Delhi , ISWA World Congress, Vienna, Austria)

Figure 1.2: Showing % of mined out marble product and waste ( Source :- Amar Sharma, Gazala Habib & Vasant Matsagar “Reuse of Marble dust as fine aggregate in UHPC” Department of Civil Engineering, IIT Delhi , ISWA World Congress, Vienna, Austria)

1.3 Justification of

And, since the strength is the most important property of concrete to be looked for, hence main focus in this study is to check the effects of marble powder on the strength of concrete.

1.4 Objective of thesis

1. To study the effects of percentage replacement of cement by marble powder on strength of concrete.

2. To study the effect on strength of standard mix of concrete by addition of marble powder in it.

3. To study the effects of percentage replacement of sand by marble powder on strength of concrete.

1.5 Scope of study

The research will cover studying the setting time of marble waste powder blended Portland cement and workability, compressive strength, flexural strength and split tensile strength of concrete produced by marble waste powder blended cement, and marble powder blended sand. Throughout the investigation, the research is limited to marble powder obtained from the factories of Indore which process marble.

1.6 Structure of the