Answer / md gulam moinuddin/laxmikant p

Sewer is the structure which is used for the purpose of
disposal/flowing of Raw water

Sewege is the waste water coming from w/c or such dirty
water with bad smell

Answer / baskar

1)sewer is a underground conduit or pipe used to removal of
sewage.
sewage is defined as a disposal of untreated water
(bathing,flushing,etc...)
storm water is called collection of rain water
2)nominal bricks sizes 19cmx9cmx9cm
standard bricks sizes 20cmx10cmx10cm
3)the different between the grade of cement 43,53,that is
comperssion strengh of concrete.

Answer / sreenu b

1 Sewer is the structure which is used for the purpose of
disposal/flowing of Raw water

Sewege is the waste water coming from w/c or such dirty
water with bad smel

2 standard-19cmx9cmx9cm
normal-20cmx10cmx10cm

3 1. Fineness of cement. 53 grade fineness compare than to 43
grade cement.
2.compressive strength of concrete.
3.Low content gypsum so, 53 grade Fast Harding compare than
to 43 grade.

Answer / elanthendral m.

Q3: Grade cement is 28th day compressive strength of Cement
mortar cube (Mix is 1:3 with graded sand). If it is 43
grade cement and it should be more than 43N/mm2 (Mpa) of
430Kg/CM2. If it is 53grade and it should be 53N/mm2 (Mpa)

In olden days reinforcing bars in concrete are not got rusted even till now. But recently provided steel getting rusted in concrete. what are the probable reasons?

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