Case Study Of Cement

3.2 MATERIALS

3.1.1 Cement:

Ordinary Portland cement available in local market of standard brand was used in the investigation. Care has been taken to see that the procurement made from a single batch and is stored in airtight containers to prevent it is being affected by atmospheric, monsoon moisture and humidity. The Cement is tested for its various proportions as per IS 4031-1988. The specific gravity was 3.10 and fineness was 3200 m2/Kg. The details are given in Table 4.1.1. The cement confirms to 53 Grade.

3.1.2 Coarse Aggregate:

Machine Crushed angular granite metal of maximum size of 20mm retained on 4.75mm I.S. sieve confirming to I.S. 383-1970 was used in the present investigation. It is free from impurities such as dust, clay particles and organic matter etc. The coarse aggregate is also tested for its various properties. The specific gravity and fineness modulus are found to be 2.56 and 7.15. The details are tabulated in 4.1.3 and 4.1.4.

3.1.3 Fine Aggregate:

The sand is free from clayey matter, salt and organic impurities. The sand is tested for its various properties like Specific Gravity, Fineness modulus, Bulk Density etc in accordance with IS 2386-1963. Fine aggregate passing through 4.75mm I.S. sieve and retained on 0.075mm I.S. sieve was used. It confirms to grading zone – II of I.S. 383-1970. The specific gravity and fineness modulus are found to be 2.50 and 2.79. These test results are tabulated in Table 4.1.4. Sieve analysis is carried out and results are shown in Table