Image: Kaolinite mineral structure. Since the earliest times, humankind has had a close association with clay. From use as a building material, in pottery, for treating human digestive ailments to a multitude of industrial uses, clay is a key ingredient in the material world we live in. mineral is a naturally occurring crystalline material that has a specific or limited range of chemical compositions. Clay minerals have a sheet-like structure and are composed of mainly tetrahedrally arranged silicate and octahedrally arranged aluminate groups.
Civil Contractors is a privately owned company operating in South East Queensland since June 1994. Based at Rocklea, our work covers a range of projects in the civil contracting industry, much of which has been in subdivisions where we have built a loyal client base.
One who takes a portion of a contract from the principal contractor or from another subcontractor. When an individual or a company is involved in a large-scale project, a contractor is often hired to see that the work is done.The contractor, however, rarely does all the work.uilding construction is a common example of how the contractor-subcontractor relationship works. The general contractor takes prime responsibility for seeing that the building is constructed and signs a contract to do so.