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Why is it that during concreting, aluminum materials is not advisable to convey concrete or use as forms in contact with concrete?

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Question added by Nelio Beleo , Civil Inspector , Petrojet
Date Posted: 2016/07/21
Imran Ahmed
by Imran Ahmed , Manager-Planning & Delay Analyst , Nesma United Industries (NUI) Saudi Arabia

Aluminum reacts with the alkalis (OH) found in portland cement concrete. When these two chemicals are combined, the reaction produces hydrogen gas. This is why, when the reaction occurs in wet concrete, you will  notice tiny bubbles coming to the surface of a slab.

A significant corrosion of aluminum embedded in concrete can occur. The corrosion can cause expansion of the concrete and subsequent cracking of hardened concrete.

Benigno Tiglao
by Benigno Tiglao , QC Manager , ABV Rock Group

Aluminum reacts with portland cement concrete. The reaction produces hydrogen gas which cause mix to expand.

Mohammad Hasan Annuari
by Mohammad Hasan Annuari , Construction Project Manager , FLORIDABLANCA CONSTRUCTION AND DEV. CORP.

BECAUSE ALUMINUM WILL EASILY ABSORB HEAT, CONCRETE MIX WILL NOT MEET THE DRYING TIME PERIOD, THEREFORE THE CONCRETE WILL RESULT TO LACK OF STRENGTH.

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