Answer / guddu singh

Their are not
necessary the size.
About aggregate we
always calculate it's
grading. Well
graded aggregate
always used for a
concrete mix design.
According to IS ph
value of water always
must between 6-8.

Answer / sjtbehera

It is bewteen 6mm to 40mm, depending upon rcc.

Answer / pravesh jha

ph value of water should be more than 7 because if the ph value of water will be below 7 than it will be acidic and it cause corrosion in reinforcement...so for corrosion resistance the ph value is taken more than 7

Answer / vki

1 20 mm
2 note less than 5

Answer / guest

20mm 7

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