Write notes on Mixing and Mixer machines of concrete.
Mixing:-
Thorough mixing of the materials is essential for the production of uniform concrete. The mixing should ensure that the mass becomes homogeneous, uniform in color and consistency. There are two methods adopted for mixing concrete:
Mixer Machines:-
As per IS: 1791-1985, concrete mixers are designated by a number representing its nominal mixed batch capacity in lit. The following are the standardized sizes of three types:
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
Write notes on Mixing and Mixer machines of concrete.
Differentiate between creep and shrinkage of concrete.
