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Which one is not a chemically inactive pore filling material?

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Which one is not a chemically inactive pore filling material?

(a) Aluminium

(b) Chalk

(c) Talc

(d) Fullers earth

This question was posed to me in class test.

This intriguing question comes from Water Proofing Admixtures in division Admixtures and Construction Chemicals of Concrete Technology

1 Answer

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Best answer
Correct option is (a) Aluminium

To explain: Chemically inactive filling material: chalk, fullers earth and talc. And aluminium is active filling material.

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