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A cover meter is an instrument to locate rebars and measure the exact concrete cover. Rebar detectors are less sophisticated devices that can only locate metallic objects below the surface. Due to the cost-effective design, the pulse-induction method is one of the most commonly used solutions. [1]
Concrete cover, in reinforced concrete, is the least distance between the surface of embedded reinforcement and the outer surface of the concrete (ACI 130). The concrete cover depth can be measured with a cover meter. The purpose of concrete cover is to protect the reinforcement from corrosion, fire, and other potential damage.
There is no ASTM standard for using a concrete moisture meter to determine a final moisture content reading. Concrete moisture meters, [4] either non-pin or pin meters are affected by what it sees in the concrete. This can be anything from the density of the concrete and aggregate size to the chemical properties of the slab.
The most common alloy used for aluminium tread plate is 6061, although 5086-H34 and 3003-H231 are also used. [1] Diamond plate is usually steel, stainless steel or aluminium. Steel types are normally made by hot rolling, although modern manufacturers also make a raised and pressed diamond design. [citation needed]
A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The box is typically rectangular or trapezoidal in cross-section.
A burial vault (also known as a burial liner, grave vault, and grave liner) is a container, formerly made of wood or brick but more often today made of metal or concrete, that encloses a coffin to help prevent a grave from sinking. Wooden coffins (or caskets) decompose, and often the weight of earth on top of the coffin, or the passage of heavy ...
Steel ties are lighter in weight than concrete and able to stack in compact bundles unlike timber. Steel ties can be installed onto the existing ballast, unlike concrete ties which require a full depth of new ballast. Steel ties are 100% recyclable and require up to 60% less ballast than concrete ties and up to 45% less than wood ties.
The Convair NB-36H was an experimental aircraft that carried a nuclear reactor to test its protective radiation shielding for the crew, but did not use it to power the aircraft. Nicknamed "The Crusader", [ 1 ] it was created for the Aircraft Nuclear Propulsion program (ANP for short), to show the feasibility of a nuclear-powered bomber . [ 2 ]
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