Identification Quiz 4 CONSMAT

Workability

It may be defined as a composite characteristics indicative of the ease with which the mass of plastic material may be deposited in its final place without segregation during placement, and its ability to conform to fine forming details.

Good Durable Concrete

It is concrete that meets the structural and aesthetic requirements for the required life of the structure at maximum economy

Good Durable Concrete

It is concrete that meets the structural and aesthetic requirements for the required life of the structure at maximum economy

Laitance

milk of concrete which develops at the top

Laitance

It is a light gray or nearly white substance which appears on the top surface of a slab during or following consolidation and finishing. It consists of water, cement and fine sand or silt particles, it has no strength and is detrimental to the surface.

Segregation

the separation of the coarse aggregate from the mortar.

Consistency

It is a measure of fluidity or wetness of the concrete and is measured by the slump test

Plastic Shrinkage

It occurs during the first few hours after placing fresh concrete in the forms. Exposed surfaces such as floor slab are more easily affected by exposure to dry

Drying Shrinkage

It occurs after the concrete has already attained its final set and a good portion of the chemical hydration process in the cement gel has been accomplished.

Bleeding

tendency of moisture to go up because of capillary action

Harsh Concrete

It lacks plasticity and cohesiveness.

Sticky Mixes

These are those that posses a high cement content or contain large amounts of rocks, dust or similar material. A fine sand mix causes a sticky mix. They do not segregate easily because of their high water demand they frequently develop shrinkage cracking.