Ethylene vinyl acetate, also known as EVA, is an elastic polymer material that is similar to rubber. EVA usually contains no more than 40 percent vinyl acetate by weight, with the rest of the polymer being ethylene. It is resistant to cracks and ultraviolet radiation.Know More
EVA is known to have an odor similar to vinegar, though the odor is not very strong. It is used in a variety of consumer products including soccer cleats, plastic wrap and foam stickers. In other products, EVA can be used as a substitute for cork.
EVA cannot be broken down by the human body, but it is largely inert and does not cause much of a reaction, if any, when implanted.Learn more in Building Materials
in construction, "formwork" refers to any mold that is subsequently filled with another material, such as concrete, to ensure accuracy and stability. A formwork consists of both horizontal and vertical braces as well as joints between each segment.Full Answer >
A footing for a poured concrete retaining wall is constructed by digging out a flat area on the ground, adding concrete forms to contain the material, placing rebar at appropriate places and finally mixing concrete before pouring into the form. A concrete footing is poured on either side of the bottom of a retaining wall to give stability to the structure.Full Answer >
To calculate the R-value in insulation, determine the R-value of the specific insulating material. For multilayer installations, determine the R-values of each layer, and add the values together to get the total R-value of the system. The higher the R-value, the greater its insulating properties.Full Answer >
Bricks vary in weight depending on their material, manufacturing process and size. At Nash Brick, a solid modular brick that is 7 5/8 inches long, 3 1/2 inches wide and 2 1/4 inches high weighs 4.3 pounds. A Watsontown brick with identical dimensions weighs 4.9 pounds.Full Answer >