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Cracks development occurs when early-age concrete is insufficiently protected against desiccation and too much water evaporates with heat because of unfavorable meteorological conditions: e.g, high temperature, direct solar insolation, dry air, low relative humidity, and high wind speed during summer, or in hot conditions. Curing is intended to ...
Another factor in stain removal is the fact that stains can sometimes comprise two separate staining agents, which require separate forms of removal. A machine oil stain could also contain traces of metal, for example. [1] Also of concern is the color of the material that is stained. Some stain removal agents will not only dissolve the stain ...
A solid slab of concrete is too hard to remove practically, and it is tougher than the barrel itself. The MythBusters enlisted the aid of FBI explosive experts (in particular Frank Doyle, making the first of many appearances on the show) to load the truck and barrel with 850 lb (386 kg) of ANFO .
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To attempt to simplify and to stylize a very complex set of various reactions, the whole ASR reaction, after its complete evolution (ageing process) in the presence of sufficient Ca 2+ cations available in solution, could be compared to the pozzolanic reaction which would be catalysed by the undesirable presence of excessive concentrations of alkali hydroxides (NaOH and KOH) in the concrete.
To ensure that only one of the two pits is used at any time, the idle pipe of the junction connecting to the out-of-use pit is closed (e.g. with cement or bricks). [30] Twin pit toilets are commonly used in rural India. [32] the Government's Swachh bharat Mission primarily used twin pit toilets since they were easier and safer to remove and ...