As per IS 456: 2000 , the $\mathrm{pH}$ value of water for concrete mix shall NOT be less than
(A) 4.5
(B) 5.0
(C) 5.5
(D) 6.0
As per IS 456: 2000 , the $\mathrm{pH}$ value of water for concrete mix shall NOT be less than
(A) 4.5
(B) 5.0
(C) 5.5
(D) 6.0