CONSTRUCTION MT

A building material consisting of a hard, chemically inert particulate substance, known as aggregate (usually sand and gravel), that is bonded together by cement and water.

(a)  

are also added to enhance the properties of the concrete mix.

(a)  

is defined as the ease with which the concrete can be mixed, transported, and placed in position in a homogenous state.

(a)  

Workability of concrete is affected by factors such as:

(a)  

is the separation of coarse aggregates from the concrete mass.

(a)  

Reasons for segregation of concrete:

(a)  

Concrete should be free from segregation. segregated concrete results into:

(a)  

separation of water from concrete mix. It renders concrete porous and reduces strength of hardened concrete.

(a)  

Excess water causes (a)   .It is formed after hardening, the formation of crust of weak mortar or cement paste on the concrete surface.

ability of concrete to resist breaking or cracking.

(a)