What are the raw materials used for the production of Portland pozzalana cement?What are the main stages of manufacturing Portland pozzalana cement?
The raw materials required for manufacture of PPC are OPC clinkers with 10 – 25 % of Pozzolanic material. The Pozzolanic material used are calcined clay (IS: 1489 part II of 1991) or fly ash (IS: 1489 part I of 1991).
The main stages of manufacturing Portland pozzalana cement are:-
Explain Kelly Ball to measure the workability of concrete. Mention the limitation of the test.
What are flaky and elongated aggregates? How can the shape of aggregate influence strength of concrete? Following is the result of a sieve analysis of 500 gm aggregate:
| IS sieve size | 10 mm | 4.75 mm | 2·36 mm | 1·18 mm | 600 micron | 300 micron | 150 micron | lower than 150 micron |
| Weight retained in gm | 0 | 10 | 50 | 50 | 95 | 175 | 85 | 35 |
Find out the 'Fineness Modulus' of the sample
Short notes on :
Differentiate between creep and shrinkage of concrete.
