Question: choose the correct statement ( s ) regarding supplementary cementitious materials ( SCMs ) : a . SCMs contain crystalline silica. b . Pozzolanic reactions

choose the correct statement(s) regarding supplementary cementitious materials (SCMs):
a. SCMs contain crystalline silica.
b. Pozzolanic reactions produce more C-S-H.
c. Pozzolanic reactions can occur without water.
d. Use of SCMs enhances the chloride diffusion coefficient of concrete.

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