Q. Spherical particles in silica fume has diameter of _______

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Q. Silica fume is usually added during ____________

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Q. What is the content of SiO₂ in fly ash?

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Q. What is the content of Al₂O₃ in fly ash?

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Q. What is the content of unburnt fuel in fly ash?

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Q. Air entrainment in concrete increases ____________

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Q. Find the odd one out.

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Q. Find the odd one out.

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Q. Find the odd one out.

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Q. Find the odd one out.

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Q. Which one is not chemical admixtures?

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Q. Which one is not part of chemical and mineral admixtures?

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Q. In a dry environment, concrete strength will be loosed as much as ___________ % in moist environment.

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Q. Concrete placed in cold weather will take ____________ time to gain strength.

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Q. After finishing concrete surface must be kept ___________

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Q. Dry intervals in surface wetting leads to ___________

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Q. Damp proofing ____________ resist water well enough.

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Q. Chemically active pore fillers ____________ the setting of concrete.

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Q. Chemically inactive pore fillers ____________ the workability.

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