Design Mix Concrete Acceptance Criteria: I. The concrete shall be deemed to comply with the strength requirements if: a) every sample has a test strength not less than the characteristic value;or b) The strength of one or more samples though ...
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Methods of Testing Self Compacting Concrete Workability
A self compacting concrete has the properties such as filling ability, passing ability and segregation resistance. Various workability tests methods are available for self compacting concrete such as slump flow tests, V-funnel test, L-box test, U-Box test, Fill box test ...
Classification and Characteristics of Bricks as per IS1077-1973
Classification and Characteristics of Bricks as per IS 1077-1973 Tests for the acceptance of bricks for building construction are: Dimension and tolerance test Compressive strength test Water absorption test Efflorescence test 1. Dimension and Tolerance Test on Bricks Take 20 ...
Permeability Test on Concrete Structures
When concrete is permeable it can cause corrosion in reinforcement in presence of oxygen, moisture, CO2, SO3- and Cl– etc. This formation of rust due to corrosion becomes nearly 6 times the volume of steel oxide layer, due to which ...
MEASURING LOSS OF PRESTRESS IN PRESTRESSED CONCRETE
Instruments for measuring loss of prestress in prestressed concrete: The initial pre-stressing force applied to the concrete element reduces due to elastic shortening of the concrete, anchorage losses, frictional losses etc. The pre-stressing force further reduces with the passage of ...
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 centrally ...
COMMON TESTS ON THE FRESH CONCRETE
Concrete is tested to ensure that the material that was specified and bought is the same material delivered to the job site. There are a dozen different test methods for freshly mixed concrete and at least another dozen tests for ...
Methods of Proportioning Cement, Sand and Aggregates in Concrete
Proportioning of concrete is the process of selecting quantity of cement, sand, coarse aggregate and water in concrete to obtain desired strength and quality. The proportions of coarse aggregate, cement and water should be such that the resulting concrete has the ...