foundation system of burj al arab

STUDY ON STRENGTH OF CONCRETE USING VARIOUS COARSE AGGREGATES, PART-2

1.2.2 General classification of aggregate 

Aggregates are divided into two categories from the consideration of size- (1) Fine aggregate and (2) Coarse aggregate. The size of aggregate bigger than 4.75 mm is considered as coarse aggregate and aggregate whose size is 4.75 mm and less is considered as fine aggregate 

1.3 Project objectives 

Prior to using any new material in construction, it is essential to know its behavior and various properties that are needed in design. In the present investigation, the production of concrete using conventional materials and some 
of its properties are studied. The investigation was primarily made to attain the following objectives: 



1. To know the physical properties of aggregates, both fine as well as coarse. 



2. To compare the compressive strength of concrete with various coarse aggregates at consistent concrete mix. 


3. To compare the tensile strength of concrete with various coarse aggregates at consistent concrete mix. 


4. To compare the flexural strength of concrete with various coarse aggregates at consistent concrete mix. 



CHAPTER – 2 

COARSE AGGREGATE 

2.1 General 

Coarse aggregate is that aggregate whose particles completely pass through 7.5 cm mesh sieve and which are entirely retained on 4.75 mm sieve. Aggregate having particles greater than 7.5 cm is 
Brick Chips
Brick Chips
Crushed Stone
Crushed Stone
known as cyclopean aggregate. 


2.2 Classification 

The materials used as coarse aggregate can be of various types such as 

1. Gravel 

2. Crushed rock such as granite, basalt, limestone, sandstone etc. 

commonly known as stone chips. 

3. Broken brick (khoa) etc. 

Bricks used for aggregate are further classified into following categories:

1. First class brick

2. Second class brick

First Class Brick
First Class Brick

3. Picked brick

4. Over burnt or jhama brick etc.

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