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Privately held Quikrete approached Summit with an acquisition offer in October, Reuters had reported. ... The concrete maker's $52.50 per share offer represents an about 29.2% premium to Summit's ...
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. [3]
(2) The thermal expansion coefficients of concrete and steel are so close (1.0 × 10 −5 to 1.5 × 10 −5 for concrete and 1.2 × 10 −5 for steel) that the thermal stress-induced damage to the bond between the two components can be prevented. (3) Concrete can protect the embedded steel from corrosion and high-temperature induced softening.
Concrete has a limited lifespan between batching / mixing and curing. This means that ready-mixed concrete should be placed within 30 to 45 minutes of the batching process to hold slump and mix design specifications in the US, [15] though in the UK, environmental and material factors, plus in-transit mixing, allow for up two hours to elapse. [16]
Rinker Materials Corporation of West Palm Beach produces several concrete, aggregate, and other heavy building products similar to the Australian product line in several US states, notably including Florida and Arizona. In Florida, for instance, it operated under the name "Florida Materials", and ran a substantial retail network for these ...
The job was completed in only 20 hours. After completion, the mast was removed, and the center hole was enclosed. The dome stood 50' high and was 145' in diameter with 16,500 sq. ft. of pillar-less interior space capable of holding 1800-2000 people. The dome was anchored to 25 concrete piers around the floor. The cost was $80,000.
Reinforced concrete is concrete in which reinforcement bars ("rebars"), reinforcement grids, plates or fibers are embedded to create bond and thus to strengthen the concrete in tension. The composite material was invented by French gardener Joseph Monier in 1849 and patented in 1867. [1]
When water is added to cement, each of the compounds undergoes hydration and contributes to the final state of the concrete. [2] Only calcium silicates contribute to the strength. Tricalcium silicate is responsible for most of the early strength (first 7 days). [3] Dicalcium silicate, which reacts more slowly, only contributes to late strength.