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4, density = 4.3 – 4.5) and various types of iron oxides, mainly magnetite (Fe 3 O 4, density = 5.2) and hematite (Fe 2 O 3, density = 5.3). The reason is their high density favorable to gamma attenuation. Both types of aggregates need to be checked for ASR as they may contain reactive silica impurities under a form or another. [29] [30] [31]
This method of ground improvement is also called vibro replacement. Such techniques increase the load bearing capacity and drainage of the soil while reducing settlement and liquefaction potential. Stone columns are made across the area to be improved in a triangular or rectangular grid pattern.
Concrete floor polished with 1800 grit. Polished concrete is a multi-step process where a concrete floor is mechanically ground, honed and polished with bonded abrasives in order to achieve a desired level of sheen or gloss. The Concrete Polishing Process. Concrete polishing begins with floor preparation. During this process, the floor is ...
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At a smaller and more concrete scale, a business simulation may put the player in charge of a business or commercial facility, designing its layouts, hiring staff, and implementing policies to manage the flow of customers and orders as the business grows. Such business simulations include Theme Hospital, Sim Tower, and Game Dev Story.
Unlike traditional concrete structures, polymer concrete requires no coating or welding of PVC-protected seams. [4] It can also be used as a bonded wearing course for asphalt pavement, for higher durability and higher strength upon a concrete substrate, and in skate parks, as it is a very smooth surface. [citation needed]
In the category of self-leveling concrete there are two main groups of materials: underlayments and toppings. An underlayment is installed over an existing subfloor to smooth it out and correct any surface irregularities prior to the installation of all types of floor coverings, including sheet vinyl, vinyl composition tile (VCT), wood, ceramic tile and carpet.
This cement can make concrete for floor slabs (up to 60 m square) without contraction joints. White blended cements may be made using white clinker (containing little or no iron) and white supplementary materials such as high-purity metakaolin. Colored cements serve decorative purposes. Some standards allow the addition of pigments to produce ...