A numerical index that represents the average particle size in an aggregate sample.

The surface moisture expressed as a percentage of the weight of the saturated surface dry aggregate.

The cements of desired colours are produced by mixing pigments with ordinary cement. Different oxides produce various colors.

Byproduct in thermal stations that are very minute and creates air pollution problems.

The ability of a material to resist changes in volume as a result of changes in physical conditions.

The toughness of an aggregate is measured in this test with the value should not exceed 30 per cent for wearing surface and 45 per cent for remaining concretes.

Organic matters, clay, shale, coal, and iron pyrites, which can negatively affect aggregates in concrete.

Type of aggregate that may be natural sand-deposited by rivers, crushed stone sand-obtained by crushing stones and crushed gravel sand.

It reduces creep and shrinkage but increases internal stress.

Type of aggregate whose fineness modulus is 5.5-8.0.

Type of fine aggregate that should be quartz, light grey or whitish variety and should be free from silt.

g of the sample is heated in a platinum crucible at 900-1000°C for 15 minutes.

Utilizes waste product as materials for this type of cement.

Sand produced from natural disintegration of rocks or deposited by stream.

These type of aggregates are obtained by crushing from quarries of igneous, sedimentary or metamorphic rocks.

Chemical compound that first reacts when water is added to cement.

Weight of cement retained on the sieve should not be more than this percentage.

(a)  

The English mason who patented the portland cement in 1924.

A kind of aggregate produced by thermally processed materials such as expanded clay and shale used for making light weight concrete.

Equipment used in finding the setting times of cement.

The residue is digested in hot water and sodium carbonate solution.

The entrapped air bubbles in the rocks during their formation lead to minute holes or cavities.

Materials used as filler with binding material in the production of mortar and concrete.

A thermal property measuring the amount of expansion when heated and contraction when cooled.

Naturally available aggregates of different fractions of fine and coarse sizes.

Most harmful impurity since it coats individual sand particles and prevents their bonding with cement consequently diminishing the strength of mortar which is further reduced by the enhanced water requirement of mortar.

Time lapsed from adding water to the complete loss of plasticity.

An inorganic, nonmetallic material with hydraulic binding properties. When mixed with water, it forms a paste that undergoes a hydration process, resulting in a hardened structure with long-term strength retention.

The most reliable strength evaluation of aggregates.