iNvention..!

AIM To determine the workability of fresh concrete by compacting factor test as per IS: 1199 - 1959.  APPARATUS COMPACTING FACTOR APPARATUS  Compacting factor apparatus  PROCEDURE The sample of concrete is placed in the upper hopper upto the brim. The trap-door is opened so that the concrete falls into the lower hopper. The trap-door of the lower hopper is opened and the concrete is allowed to fall into the cylinder he excess concrete remaining above the top level of the cylinder is then cut off with the help of plane blades. The concrete in the cylinder is weighed. This is known as weight of partially compacted concrete. The cylinder is filled with a fresh sample of concrete and vibrated to obtain full compaction. The concrete in the cylinder is weighed again. This weight is known as the weight of fully compacted concrete. REPORTING OF RESULTS Compacting factor = (Weight of partially compacted concrete/ Weight of...

AIM To determine the workability of fresh concrete by slump test as per IS: 1199 - 1959 APPARATUS SLUMP CONE

AIM To determine the aggregate crushing value of coarse aggregates as per IS: 2386 (Part IV) - 1963.  APPARATUS CYLINDRICAL MEASURE AND PLUNGER

AIM To determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) - 1963. APPARATUS AGGREGATE IMPACT TEST MACHINE Impact testing machine conforming to IS: 2386 (Part IV) - 1963 IS Sieves of sizes - 12.5mm, 10mm and 2.36mm A cylindrical metal measure of 75mm dia. and 50mm depth A tamping rod of 10mm circular cross section and 230mm length, rounded at one end Oven  PREPARATION OF SAMPLE   The test sample should conform to the following grading: - Passing through 12.5mm IS Sieve 100% - Retention on 10mm IS Sieve 100% The sample should be oven-dried for 4hrs. at a temperature  of 100 to 110oC and cooled. The measure should be about one-third full with the prepared  aggregates and tamped with 25 strokes of the tamping rod.  A further similar quantity of aggregates should be added and  a further tamping of 25 strokes given. The measure should  finally be filled to overflow, tamped 25 times ...

AIM To determine the abrasion value of coarse aggregates as per IS: 2386 (Part IV) - 1963.  APPARATUS LOS ANGLES MACHINE Los Angles abrasion testing machine IS Sieve of size - 1.7mm Abrasive charge - 12 nos. cast iron or steel spheres  approximately 48mm dia. and each weighing between 390 and 445g ensuring that the total weight of charge is 5000 + 25g Oven PREPARATION OF SAMPLE The test sample should consist of clean aggregates which has been dried in an oven at 105 to 110o C to a substantially constant weight and should conform to one of the gradings shown in the table below:  PROCEDURE   The test sample and the abrasive charge should be placed in the Los Angles abrasion testing machine and the machine rotated at  a speed of 20 to 33 revolutions/minute for 1000 revolutions. At the completion of the test, the material should be discharged and sieved through 1....

AIM To determine the particle size distribution of fine and coarse aggregates by sieving as per IS: 2386 (Part I) - 1963. PRINCIPLE By passing the sample downward through a series of standard sieves, each of decreasing size openings, the aggregates are separated into several groups, each of which contains aggregates in a particular size range. APPARATUS A SET OF IS SIEVES  A set of IS Sieves of sizes - 80mm, 63mm, 50mm, 40mm, 31.5mm, 25mm, 20mm, 16mm, 12.5mm, 10mm, 6.3mm, 4.75mm, 3.35mm, 2.36mm, 1.18mm, 600μm, 300μm, 150μm and 75μm. Balance or scale with an accuracy to measure 0.1 percent of the weight of the test sample. SAMPLE The weight of sample available should not be less than the weight given below:- The sample for sieving should be prepared from the larger sample either by quartering or by means of a sample divider. PROCEDURE  The test sample is dried to a constant weight at a temperature of 110 ...

Direct Jump Plz Click to below Link... THE ORIGIN OF DIWALI RANGOLI PHOTOS DIWALI PHOTOS _______________________________________________________________ The Origin of Diwali Historically, the origin of Diwali can be traced back to ancient India, when it was probably an important harvest festival. However, there are various legends pointing to the origin of Diwali or 'Deepawali.' Some believe it to be the celebration of the marriage of Lakshmi with Lord Vishnu. Whereas in Bengal the festival is dedicated to the worship of Mother Kali, the dark goddess of strength. Lord Ganesha, the elephant-headed God, the symbol of auspiciousness and wisdom, is also worshiped in most Hindu homes on this day. In Jainism, Deepawali has an added significance to the great event of Lord Mahavira attaining the eternal bliss ofnirvana. Diwali also commemorates the return of Lord Rama along with Sita and Lakshman from his fourteen year long exile and vanquishing the demon-k...