# CMT Lab.docx - Name Course Subject Instructor Date TEST 1...

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Name: Date: Course: Subject: Instructor: TEST # 1 FINENESS OF CEMENT IS: 4031 (Part 1) - 1996 I. OBJECTIVE To determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) - 1996. II. PRINCIPLE The fineness of cement is measured by sieving it through a standard sieve. The proportion of cement, the grain sizes of which, is larger than the specified mesh size is thus determined. III. APPARATUS a. 90µm IS Sieve b. Balance capable of weighing 100g to the nearest 10mg c. A nylon or pure bristle brush, preferably with 25 to 40mm bristle, for cleaning the sieve IV. PROCEDURE a. Weigh approximately 100g of cement to the nearest 0.01g and place it on the sieve. b. Agitate the sieve by swirling, planetary and linear movements, until no more fine material passes through it. c. Weigh the residue and express its mass as a percentage R1, of the quantity first placed on the sieve to the nearest 0.1 percent. d. Gently brush all the fine material off the base of the sieve. e. Repeat the whole procedure using a fresh 100g sample to obtain R2. Then calculate R as the mean of R1 and R2 as a percentage, expressed to the nearest 0.1 percent. When the results differ by more than 1 percent absolute, carry out a third sieving and calculate the mean of the three values. V. RESULT The percentage weigh of residue over the total sample is reported. % weight of residue = wt. of sample retained on the sieve Total weight of the sample VI. LIMITS The percentage residue should not exceed 10% Solution: Conclusion/Discussion:
Name: Date: Course: Subject: Instructor: TEST # 2 SIEVE ANALYSIS OF COARSE AGGREGATES AASHTO T 27/ASTM C 136 I.OBJECTIVE This test method covers the determination of the particle size distribution of coarse aggregates by sieving II. PRINCIPLE This test method is used primarily to determine the grading of materials proposed for use as aggregates or being used as aggregates. The results are used to determine compliance of the particle size distribution with applicable specification requirements and to provide necessary data for control of the production of various aggregate products and mixtures containing aggregates. The data may also be useful in developing relationships concerning porosity and packing. III. APPARATUS a. A set of IS Sieves of sizes - 25mm, 20mm, 16mm, 12.5mm, 10mm, 6.3mm, 4.75mm. b. Balance or scale with an accuracy to measure 0.5 percent of the weight of the test sample c. A nylon or pure bristle brush, preferably with 25 to 40mm bristle, for cleaning the sieve d. Mechanical sieve shaker (optional) e. Oven of appropriate size capable of maintaining a uniform temperature of 110 +/- 5°C (230 +/- 9° F) IV. PROCEDURE a. Dry the sample to constant mass at a temperature of 110+/- 5°C (230 +/- 9°F). b. Weigh approximately 1000g of coarse aggregates to the nearest 0.1g and place it on the sieve. c. The sample is sieved by using a set of IS Sieves.