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A number of holes are then cut or drilled into the stone face along the scored line approximately 10 to 20 centimetres (3.9 to 7.9 in) apart. Plug and feather sets are inserted in the holes, with the "ears" of the feathers facing the direction of the desired split. The plugs are then struck with a hammer in sequence.
In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson ' box ', from Italian cassone ' large box ', an augmentative of cassa) is a watertight retaining structure. [1] It is used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ...
Tire-derived aggregate (TDA) is a building material made of recycled tires, which are shredded into pieces of varying sizes. It is commonly used in construction projects because it is sustainable and lightweight, along with being less expensive than many competing available materials.
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Using digging bars to move rocks A girl and a man dig a hole with a heavy digging bar to plant a tree. Common uses of digging bars include breaking up clay, concrete, frozen ground, and other hard materials, moving or breaking up tree roots and obstacles, and making holes in the ground for fence posts.
The main difference between the two processes is the equipment used to break the concrete pavement and the size of the resulting pieces. The theory is that frequent small cracks will spread thermal stress over a wider area than infrequent large joints, reducing the stress on the overlying asphalt pavement.