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Influence of Limestone Fillers on the Properties of Concrete
Can cement in concrete be reduced without having any adverse effects on the properties of concrete?
Concrete Compressive Strength Test
Introduction
Once the required workability was confirmed using the concrete slump test, a minimum of six cubes (100 mm x 100 mm x 100 mm) per concrete mix were cast and cured in water. Three of which were cured for 7 days and the other three were cured for 28 days and were tested for their compressive strengths.
Procedure
The strength of the concrete cubes is tested using a compression tester. The apparatus applies a force at a specified rate and records the force at which the cube fails. The final compressive strength is calculated as the average pressure at failure for three specimens of the same mix.
 Mould FillingThe mould is filled with the fresh concrete |
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 Mould after compactionThe mix is then compacted to get rid of air voids using either a compaction rod or a vibrator |
 Mould Filling |
 Cubes after demoulding |
 Cube water curingThe cubes are then placed in a curing tank filled with water at a regulated temperature and is left to cure for 7 & 28 days |
 Compression TestingA constant pressure is applied to the cube until it fails and the failure force is recorded |
 Cube at failure |
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