A) \[C{{a}_{3}}A{{l}_{2}}{{O}_{6}}\]
B) \[C{{a}_{3}}Si{{O}_{5}}\]
C) \[C{{a}_{2}}Si{{O}_{4}}\]
D) \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\]
Correct Answer: D
Solution :
A typical composition for port land cement is \[CaO,\,\,Si{{O}_{2}},\,\,A{{l}_{2}}{{O}_{3}},\,\,F{{e}_{2}}{{O}_{3}},\,\,CaS{{O}_{4}}.2{{H}_{2}}O\], \[\therefore C{{a}_{3}}{{(P{{O}_{4}})}_{2}}\] is not contained in port land cement.
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