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Category: construction

Construction: cement vs concrete

By Jack Posted on February 22, 2024 Posted in construction

Self-tutoring about construction definitions: the tutor mentions the difference between cement and concrete. I recall when I was a kid, perhaps in grade four or five, one of my fellow students had a bottle of rubber cement. It was used, …

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Construction: prestressed concrete, part 1

By Jack Posted on February 12, 2024 Posted in construction

Self-tutoring about construction: the tutor mentions prestressed concrete. Prestressed concrete, as I understand, is a block of concrete that contains steel reinforcement that’s been stretched. As a result, the concrete itself is experiencing an internal elastic force because the steel …

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Chemistry: solubility, single replacement reaction: why mortar hardens

By Jack Posted on February 10, 2017 Posted in chemistry, construction Tagged with calcium hydroxide vs calcium carbonate

The tutor explains why mortar hardens over time. A single replacement reaction is of the form AB + C → AC + B The setting of mortar happens by such a reaction: Ca(OH)2 + CO2 → CaCO3 + H2O Ca(OH)2 …

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