02 Cement and other Cementitious Materials Flashcards
A hydraulic cement made by burning a mixture of clay and limestone in a rotary kiln and pulverizing the resulting clinker into a very fine powder.
Portland Cement
A cement for general use when special properties are not required, such as resistance to sulfate attack.
Type 1, Ordinary Portland Cement (Normal)
A special cement which has air bubbles introduced in the cement or concrete that provides the space for expansion of minute droplets of waters in the concrete due to freezing and thawing and protects from cracks and damage of concrete.
Type 1A, Portland Cement with Air-Entraining Additives
Cement that generates less heat and at a slower rate during the hydration process.
Type 2, Modified Portland Cement (Moderate)
A cement for use when high strength is desired at early periods, usually within a week or less.
Gains strength quicker by adding calcium chloride to rapid hardening cement.
Type 3, High Early Strength Cement (Extra Rapid Hardening Cement)
A cement for use where low heat of hydration is desired develops strength at a much lower rate than Type 1.
Prepared by keeping the tricalcium below 6% and increasing the proportion of C2S.
Used for mass concrete construction, gravity dams, etc.
Type 4, Low Heat Cement
Used when high resistance to sulfate action is desired (ex: soil has high sulfate content, places with high alternating wetness).
Type 5, Sulfate Resistant Cement
An interground mixture of Portland Cement clinker and granulated blast furnace slag.
Type IS, Portland Blast Furnace Slag Cement
An interground mixture of Portland Cement clinker and pozzolan. Portland pozzolan cement it prepared by grinding pozzolanic clinker with Portland cement. It is used in marine structures, sewage work, and for concrete underwater such as bridges, piers, dams, and mass concrete works.
Type IP, Portland Pozzolan Cement
Uses raw materials so that the finished product will be white rather than gray.
White Portland Cement
A mixture of Portland cement, air-entraining additives, plasticizers, etc.
Masonry Cement
A siliceous material such as fly ash, that reacts chemically with slaked lime in the presence of moisture to form a slow hardening cement.
Pozzolan / Portland Pozzolan Cement, Modified Portland Cement
Also known as Aluminous Cement or Calcium Aluminate Cement. It resists hydroxylic compounds such as phenols, glycerols, and sugar, and may be used as an accelerating admixture in Portland Cement. Obtained by mixing calcinic bauxite and lime with clinker. 32% Alumina. Used for construction subject to high temperature.
High Alumina Cement
Produced by mixing 5-10% mineral pigments with ordinary cement. Widely used for decorative purposes.
Colored Cement
Produced by adding indigenous air-entraining agents such as resins, glues, sodium salts of sulfates, etc. during grinding of clinker. Suited to improve workability with smaller water-cement ratio and improve frost resistance of concrete.
Air Entraining Cement
