Glencoe: 14 Flashcards
Specialty Cements 1. 2. 3. 4.
Self-Leveling
Hydraulic
Anchor
Resurfacing
Self-leveling cement:
flows like thin syrup. Often poured over a floor to cover tubes used in radiant heat systems. Used to remodel work to level uneven subfloors.
Hydraulic Cement:
expands when mixed with water and hardens within minutes. Used to plug holes and cracks in foundations
Anchor cement:
fast setting. Used to secure railings and hardware in holes drilled in a concrete surface. Higher compressive strength than standard cement.
Resurfacing cement.
Used to repair damaged concrete surfaces. Its fine aggregate allows it to be spread in thin layers.
Aggregates:
Granular materials such as sand gravel or crushed stone.
Fine aggregate:
max diameter:
sand or other particles 1/4”
Coarse aggregate:
max diameter:
Pea gravel, crushed stone, or other suitable material larger than 1/4”.
Large aggregates in concrete should be X
solid
Should you use layer material like shale in concrete?
no
All aggregates must be X
clean because dirt and debris reduce strength of concrete
The size of aggregates:
varies depending on the kind of work
Max thickness of aggregate for finished walls:
1/5 of wall thickness
Max thickness of aggregate in slab:
1/3 of slab thickness
Never use aggregate that is larger than X the width of the narrowest space through which concrete will be required to pass during placement.
3/4
