Supplementary Cementing Materials Flashcards
All pozzolanic scms
Silica fume, low calcium oxide fly ash
Pozzolanic and and hydraulic reaction SCM’s
Medium calcium oxide fly ash high calcium oxide fly ash slag
Why use SCM’s
Maybe our industrial five products they’re cheaper than cement, can improve long-term durability of concrete
Definition of pozzolanic
Has little or no cementitious value in itself but when in the presence of moisture well chemically react with calcium hydroxide to form cementitious properties
Source of fly ash
Byproduct of call combustion
Which fly ash has a faster reaction
Class C fly ash
Source of slag
By product production of metal or refined metal
What SCM would you use to decrease bleeding
Fly ash, silica fume
What SCM’s decrease air content
Fly Ash, silica fume
What SCM increased is plastic shrinkage cracking
Silica fume
Increase in strength gains what SCM
Silica fume
What supplementary cementing materials decrease permeability
All of them
For early strength and late strength what supplementary cementing material should you use
Silica fume
What effect do supplementary cementing materials have on the inter-facial transition zone
Because supplementary cementing materials are smaller than concrete the porosity and D I TZ is decreased and that increases the strength gains of the concrete
Combination for long term strength In concrete using supplementary cementing materials
Fly ash in silica fume
Why use fly ash as a supplementary cementing material
It is half the cost of cement
What is the most important stage of Portland cement manufacture? Why?
When the right materials go through the rotary kiln The C3 SC to S and clinker or produce this C3 us and see you too as contribute largely to strength gains early and late in concrete and the clinker once ground will be the actual concrete
What is the impact of the use of pozzolanic materials on the durability of concrete explain
Pause a Linux materials generally increase the durability of concrete because when puzzle in a material that was our use that or finer than the seeming grains they decrease the impact of the interfacial transistor in zone by decreasing the permeability
