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, …
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 …
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 …
Chemistry: solubility, single replacement reaction: why mortar hardens Read more »