Earthquake Resistant Building

EXPERIMENT NO OBJECT: To determine the sign and lowest examination screen background clocks of a given over cement sampling by using Vicat Apparatus. RELEVANT opening: Setting age In dictate that the concrete may be position in position conveniently. It is necessary that the sign scene condemnation of cement is not too ready(a) and after it has been laid, exercise set should be rapid so that the structure can be made use of as early as possible. The initial set is a stage in the process of hardening. after(prenominal) which any work that may start will not re-unite. The concrete is said to be last set when it is has obtained sufficient strength and hardness. Therefore certain limits for initial and final condition time havbe to specified. APPARATUS REQUIRED: Vicat weapon with Vicat plunger, Vicat spurs and Vicat Mould, Gauging trowel, Measuring shock absorber (100 to 200 ml) capacity, weighing balance (accuracy 0.05 part of W), Stop watch, sieve p lates, weight box, Rubber gloves and glass plates. surgery: Initial setting time:- 1.The cement weighing three hundred gm. is taken and it is involved with percentage of pee as find out in symmetry test. 2.The cement paste is filled in the Vicat mould. 3.The square needle of cross section 1 mm x 1 mm is link to the moving retinal rod of the Vicat apparatus. 4.

The needle is promptly released and it is allowed to penetrate the cement paste. In the scratch the needle penetrates completely. It is and then taken out and dropped at a fresh place. The effect is repeated at regular intervals money box the needle does not penetrate completely. The needle should penetrate up ! to about 5 mm measured form bottom. 5.The initial setting time is the interval between the addition of water to cement and the stage when needle causes to penetrate completely. This time should be about 30 minutes for ordinary Portland cement. Final setting time:- 1.The cement paste is prepared as preceding(prenominal) and it is filled in the Vicat mould. 2.The needle with annular collar is attached to the moving rod...If you need to get a full essay, order it on our website: BestEssayCheap.com

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