Caisson - Usually cylindrical in shape. Part of a footing or foundation.

 
Calcium Chloride - A 32% solution or a solid, when added to concrete acts as a set accelerator.

 
Cement - Known as Portland Cement, is a hydraulic product, which means it sets and hardens when it chemicaly interacts with water and is able to do this under water.

 
Cementitious - Having cementing qualities.

 
Coarse Aggregate - Graded granular material with a nominal maximum size ranging from 1 1/2" down to 3/8".

 
Concrete - a mixture of sand, stone, cement and water.