G1 - LT#1 Uses for Concrete Flashcards
Plain concrete is:
Concrete without any reinforcement
Thermal expansion of concrete or steel must be:
The same rate in both
Cenent paste bonds only to:
Both steel and aggregates
Pre-stressed concrete is:
Under tension at all times
Pre-tensioning is:
Before concrete is placed
Is a flat roof a concrete shell roof?
No
What reproduces the texture of forming materials?
Form lining
The term concrete masonry means:
Bricks or blocks
Concrete with air entrainment is:
Microscopic air bubbles
A cement mixture applied with compressed air is called:
Shot-crete
What makes pervious concrete different from other types?
It is porous
Advantages of pervious concrete:
1) Water percolates through into soil below
2) It is environmentally friendly
3) May save materials and labour
Concrete provides what strength?
Compressive
Rebar provides what strength?
Tensile
The amount of overlap for rebar is:
24 times the diameter of the bar
Calcium chlroride should not be used in an accelerator in concrete because:
It corrodes the steel
In marine structures, what kind of rebar is used?
Epoxy paint rebar
What is soil-cement?
Simple, highly compacted mixture of soil. Portland cement and water.
Used mainly for paving roads, streets, and airports.
Thin bituminous sealing course is placed over it.
What is shotcrete?
Concrete that is applied by a pneumatically operated gun.
Non shrink grout used for?
Supporting machine bases and columns.
Mortar is:
Mixture of cement, water and sand.
What is self-leveling gypsum?
Concrete can act a noise and fire separation. Self-leveling, no troweling ior fginishing.
Pervious concrete is?:
Used mainly in slab-on-grade type -porous so that water passes through
