Aquadam’s gunite reservoir, also known as a seamless concrete reservoir, offers many advantages over conventional concrete in terms of repair work and new construction. It is more economical to use than conventional concrete, since formwork is reduced considerably. Because the sand and cement are mixed dry and pneumatically conveyed through an easily manoeuvred hose, it enables placement of concrete in the most inaccessible areas, and it bonds perfectly with properly prepared surfaces of concrete, steel, rock, stone, brick, or tile. It has good waterproofing qualities, even in thin sections.
Steel reinforcement keeps the whole structure together and strongly integral, with the cement mainly serving the purpose of waterproofing. Filling, emptying, and temperature variations cause the rigid concrete layer to expand and contract and these movements may result in cracks. Our structures are flexible enough to control the cracking and yet not leak, because a gushing leak may cause the steel reinforcement to rust. Our design is according to strict British standards that allow cracks to be no wider than 0,2 mm. The cracks may be visible when the reservoir is empty, but “heal” themselves as it is filled with water and the concrete expands and absorbs some water.
The junction of the wall and floor was designed to make use of L-bars and splice bars to counter excessive movement in this area and transfer stresses to the hoop bars, which are high-tensile bars 10-12 mm thick. The hoop reinforcement in the wall is placed in accordance with the critical zone, which depends on the size and height of the dam. The position of these hoops is calculated to be within 25 mm of the point of maximum stress to inhibit excessive movement.
Aquadam gunite reservoirs therefore provide many years of reliable and outstanding service, surpassing all other concrete dams in quality, durability and, ultimately, cost. It has high strength, low absorption, good resistance to weathering and many kinds of chemical attack, and has excellent fireproofing qualities.
Various companies, mines, institutions, governmental departments, and individuals are constantly commissioning Aquadam to construct new and to repair existing concrete reservoirs. Our unique method of repairing leaking dams and reservoirs is not used by any other manufacturer in the industry.
The success rate and great demand for seamless structures have opened doors throughout the country, and Aquadam installs gunite reservoirs anywhere.