Cement Flashcards
(33 cards)
Generic term for fine, gray or white powder manufactured using high temperature to produce silicates that in the presence of water will undergo hydration
Cement
Who patented the word “portland cement” in 1824?
Joseph Aspdin
Cementitious Materials
Calcium oxide “Lime”
Silicon Dioxide “Silica”
Aluminum Dioxide “Alumina”
Iron oxide
Materials used for Portland cement
Limestone Marl Shale Iron Ore Clay Fly ash
Cement Manufacturing process
Quarrying Raw grinding Homogenization Burning Finish grinding Storage and packing
Kinds of cement:
Portland Cement
Blended Cement
Types of Portland Cement base on ASTM C150
Type 1,2,3,4,5,6a,7a,8a
Type 1 PC
For general purpose
Type 2 PC
Construction in water or soil with a moderate amount of sulfate
Type 3 PC
high strength at an early state
Type 4 PC
Massive concrete surfaces (dams)
Type 5 PC
Resist chemical attack by soil and water with high sulfate
Type 6A,7A,8A
cement used to make air-entrained concrete
Produced by intimately and uniformly intergrinding or blending two or more types of materials
blended cement
Blended cement primary materials
Portland Cement Ground granulated blast furnace slag Fly ash Silica fume Calcinated Clay Pozzolans Hydrated lime
Types of blended cement
Type IS Type IP & Type P Type I(PM) Type S Type I(SM)
Type IS
Portland blast furnace slag cement
Type IP & Type P
Portland-pozzolan cement
Type I(PM)
Pozzolan modified Portland Cement
Type S
Slag cement
Type I(SM)
Slag modified Portland cement
Two main raw materials used for Portland Cement
Calcareous substances
Argillaceous elements
Calcareous substances
Chalk, limestones, marl, shells
Argillaceous elements
rich in silica
