G-7 Learning Task 1 Flashcards
(15 cards)
At what stage of finishing is an edger used
After bull floating
What is the purpose of hand/bull floating
Push large aggregate down and allow bleed water to escape
Why is a divider tool not used to make control joints?
The groove is not deep enough
When is placing of the concrete completed
After floating
Why should the bleed water be allowed to evaporate
Not to dilute surface concrete, causes dusting and crazing
When are screeds removed form the concrete
After strike-off
What is the purpose of screed
Elevated guide for strike-off
How is the top of a concrete wall finished
Remove cleats and float
What tool is used to transfer flexible patterns?
Tamper
What safety precautions must be taken with concrete treatments
Read SDS
What are the environmental concerns associated with concrete treatments?
Streams and groundwater
How do sealers and hardeners also act as curing compounds
Coat surface to stop moisture
difference between dampproofing and waterproofing materials?
Moister vs hydrostatic pressure
How is suspended concrete slab waterproofed
Membrane roofing
What are pigments used for
Colouring concrete or surface
