Argillaceous material does not include________________?
Correct answer: B. marine shells
- A. vlay
- B. marine shells
- C. slate
- D. blast furnace slag
Explanation
Argillaceous materials are rich in silica and alumina and include clay, slate and some industrial slags. Marine shells are mainly calcium carbonate, so they are calcareous rather than argillaceous. Students may choose d because blast furnace slag is an industrial waste, but it can serve as an argillaceous material in cement manufacture.
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