F

F‘C
Symbol that indicates kilos per square centimeters that concrete should resist.

False set
Temporary stiffening arising after mixing cement with water. It is dispelled by mixing it again.

Fine aggregate
Sand or other inorganic material, remaining within a size of particle lower than 1 cm.

Fineness of cement
Size of cement particles; it can go from 60 to 1 micrometer (1 micrometer = thousandth of milimeter). The 'fineness percentage' is usually defined as the percentage of material that can go through a sieve.

Finish
Final concepts of buildings, such as paste or gypsum surfaces, floors, painting, tiles and coating.

Fire resistance
Property of a material to resist heat. Regarding construction elements, it refers to the property to continue developing a structural function after being exposed to heat.

Flatten
Fine finished covering for walls in order to protect them from humidity and to beautify them. It is applied in three layers: Plastered, leveled and finished.

Floor drain, cesspool
Tube piece with an "S" form, placed in drainage to avoid bad smells or insects and rodents that live in drainage.

Floor or wall tiles
Product made of cement, chemical admixtures and charges, whose properties are its high adhesiveness and viscosity. It is used to recover tiles and ceramics.

Fly ash
Artificial pozzolan, similar to cement powder, subproduct of combustion of powdered coal produced in electricity plants Foundation Masonry or reinforced concrete structure that supports and distributes evenly the house weight.

Freight car
Railroad truck, long and covered vehicle used to transport merchandises.