on that point atomic number 18 many tastes which are conducted to check the quality of concrete. These runnels are basically divided into cardinal categories.
* Various Lab Test on Fresh Concrete
Under these, the following tests will be carried out in laboratory:
i. Slump test
ii. Compacting factor
iii. Vee-Bee test
* Various Lab Test on Hardened Concrete
There are two kinds of tests which are done on hardened concrete. These are non-destructive test and destructive tests. Both of them will be done during this course. In non-destructive test, the sample is not destroyed and this test is very expedient in determinusining the strength of existing buildings or structures where as in destructive test a sample is make and then destroyed to find out the strength of concrete. coalescence and core tests are the example of destructive test. The nondestructive tests that will be carried out are the Rebound Hammer and Ultrasonic nervous impulse velocity tests.
* Test to determine the workability of fresh concrete (Developed from ASTM C- 125, 143, and ACI banner 211.3.
)
* Definition of workability
Workability of concrete is defined in ASTM C-125 as the place determining the effort required to manipulate a impudently mixed quantity of concrete with minimum loss of homogeneity. The term manipulate includes the early-age operations of placing, compacting, and finishing. The effort required to place a concrete mixture is determined largely by the boilersuit work needed to initiate and maintain flow, which depends on the rheologic property of the lubricant (the cement paste) and the internal friction amidst the aggregate particles on the one hand, and the external friction between the concrete and the surface of the formwork on the other.
Consistency, measured by the slump-cone test or Vebe apparatus (described below), is used as a simple-minded index for mobility or flowability of fresh concrete. The effort required to compact...If you fatality to get a full essay, order it on our website: Orderessay
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