Factors affecting the strenght of concrete

concrete strength and the factors affecting the strength

1. FACTORS AFFECTING THE STRENGHT OF CONCRETE MUBARAK ALI L-18CE-11 1

2. INDEX 2

3. RATIO OF CEMENT AND AGGREGATE Aggregates Are The Key Factors That Will Affect The Impact Strength Of Concrete 3

4. SHAPE, SIZE, TEXTURE OF THE AGGREGATE The most common size of aggregate used in concrete is 20mm  coarse aggregate larger than 4.75 mm fine aggregates below 4.75 mm. 4

5. MODE OF COMPACTION Compaction is a process that brings about an increase in soil density or unit weight, accompanied by a decrease in air volume Compaction leading to air void content of 5% and 10 % results in loss of strength of 30% to 55% respectively. 5

6. CURING Curing of concrete is defined as providing adequate moisture, temperature, and time to allow the concrete to achieve the desired properties for its intended use. Curing must be done 7 to 14 days 6

7. CONCRETE MIX 7 The main object of mixing concrete is to obtain a uniform and easily workable concrete paste Concrete mix ratio 1:2 :4

8. WATER-CEMENT RATIO The water-cement ratio is ratio of volume of water in concrete to the volume of the cement Water–cement ratio is  0.45 to 0.60 8

9. Thanks………. 9