Search results
Results from the WOW.Com Content Network
Conversely, concrete is one of the most powerful tools for proper flood control, by means of damming, diversion, and deflection of flood waters, mud flows, and the like. Light-colored concrete can reduce the urban heat island effect, due to its higher albedo. [3] However, original vegetation results in even greater benefit.
Degraded concrete and rusted, exposed reinforcement bar (rebar) on Welland River bridge of the Queen Elizabeth Way in Niagara Falls, Ontario. Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars due to the carbonatation of hardened cement paste or chloride attack under wet ...
The effect of these changes is an overall loss of concrete strength. The above effects are typical of attack by solutions of sodium sulfate or potassium sulfate . Solutions containing magnesium sulfate are generally more aggressive, for the same concentration.
Primary efflorescence is named such, as it typically occurs during the initial cure of a cementitious product. It often occurs on masonry construction, particularly brick, as well as some firestop mortars, when water moving through a wall or other structure, or water being driven out as a result of the heat of hydration as cement stone is being formed, brings salts to the surface that are not ...
The effect is like shaking ground coffee around to create more room, one researcher told CNN. But that wasn’t the startling conclusion. Dozens of luxury condos and hotels in Florida are sinking ...
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.
In 2022, Hamilton County Coroner Jeff Jellison said in a press release that investigators believe the 10,000 human bones and fragments police found at Baumeister’s property in the 1990s could be ...
Jo Denman and Tessa Parry-Wingfield formed a close friendship after they were both diagnosed with a rare form of cancer which resulted in them each having an eye removed