REPAIR OF POST CONCRETING DEFECTS IN STRUCTURES
The four essential features of a successful repair are: 1. Expediency: The longer the repair is left, the more work has to be done, and the less likely that the repair will blend in. 2. Cleanliness: when repairing concrete,...
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REINFORCEMENT COVER AND PRE-CONCRETE CHECKS
Reinforcement Cover: It is essential that the steel reinforcement bars are surrounded sufficient impermeable concrete to protect them from corrosion, and to allow the combined strength of the reinforcement and concrete to be effective. From the diagram above, we...
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REINFORCEMENT CORROSION-CAUSES & PREVENTION
REINFORCEMENT CORROSION-CAUSES & PREVENTION The corrosion of steel reinforcement is complex, but basically it is an electro-chemical reaction similar to that of a simple battery. The composition of mild steel varies along its length and potential anodic (more negatively...
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BULK DESNSITY OF CONCRETE
BULK DENSITY MEASUREMENT OF CONCRETE The bulk density measurement is used for determining the weight per cubic meter of freshly mixed concrete (density of concrete) from which the yield of concrete per cubic meter can be calculated. Procedure for...
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ACCELERATED CURING METHOD FOR COMPRESSIVE STRENGTH TEST
ACCELERATED CURING METHOD is used to get early high compressive strength in concrete. This method is also used to find out 28 days compressive strength of concrete in 28 hours. (As per IS 9013-1978-Method of making, curing and determining...
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DIGITAL COMPRESSION TESTING MACHINE
The digital compression testing machine is used to determine the compressive strength of cube and cylinder (i.e. hardened concrete). Procedure as per IS 516 – Methods of tests for strength of concrete 1. Keep the specimen to be tested...
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WHY WE TEST CONCRETE SRTRENGTH AFTER 28 DAYS?
Why do we test concrete compressive strength after 28 days? The table below shows the compressive strength gained by concrete after 1, 3, 7, 14 and 28 days with respect to the grade of concrete we use. Age Strength...
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