G1 - LT #3 Flashcards
1
Q
Materials added to basic concrete are caled:
A
Admixtures
2
Q
What is the effect at adding of an air entraining agent?
A
It adds minute microscopic bubbles to a concrete mix
3
Q
How does fly ash help concrete?
A
Cement replacement - improves durability and workability
4
Q
How does blast furnace slag help concrete?
A
Cement replacement and enhances service life of the concrete
5
Q
How does Silica fume help concrete?
A
Used where high impermeability or high strength concrete is needed
6
Q
What does a gas-forming agent do?
A
Expands grout as it cures
7
Q
How much Pozzolan is used in cement mix?
A
20 % on averasge
8
Q
A
