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Example of flat piece of concrete having dislodged with corroded rebar underneath, Welland River bridge across Queen Elizabeth Way in Niagara Falls, Ontario. The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that cause the formation of cracks and disrupt the concrete structure.
The Ark Two Shelter is a nuclear fallout shelter built by Bruce Beach (14 April 1934 – 10 May 2021) [1] [2] in the village of Horning's Mills (north of Toronto, Ontario). [3] The shelter first became habitable in 1980 and has been continuously expanded and improved since then. [ 4 ]
ASTM C1293: "Test Method for Concrete Aggregates by Determination of Length Change of Concrete Due to Alkali-Silica Reaction". It is a long-term confirmation test (1 or 2 years) at 38 °C in a water-saturated moist atmosphere (inside a thermostated oven) with concrete prisms containing the aggregates to be characterised mixed with a high-alkali ...
The Ontario Science Centre (OSC; originally the Centennial Museum of Science and Technology) is a science museum organization based in Toronto, Ontario, Canada. Its original location was permanently closed to the public on June 21, 2024 and was located near the Don Valley Parkway about 11 kilometres (6.8 mi) northeast of downtown on Don Mills ...
Frost damage of early-age concrete is particularly harmful for the concrete mechanical resistance because the ice volume expansion causes micro-cracks in the concrete structures, and as a consequence it lowers the compressive strength of concrete. [4]
Willowbank diploma students tour the Queenston Quarry, an historic limestone quarry near its campus in Queenston, Ontario. South entrance of the Hamilton House, the central building on campus. A forge and stone studio under dry stone and timber-frame construction on the Willowbank campus.
The plants are native to High Park and Ontario and cultivation of the plants is encouraged to preserve the species. The Cafe is also used for community meetings. A labyrinth, based on the Chartres pattern, is located north of the cafe, marked onto a concrete circle formerly used for a picnic shelter. It was installed in 2004.
The report acknowledges that Ontario has experienced a 1.4°C increase in average temperatures, and that the province is suffering from more frequent extreme weather events including prolonged heat waves, torrential rain and wind storms, and drought. The report outlines how the province should prepare for and minimize the negative impacts of a ...
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