Mixing, transporting, and handling of concrete should be carefully coordinated with placing and finishing operations. Concrete should not be deposited more rapidly than it can be spread, struck off, consolidated, and bullfloated and deposited continuously as near as possible to its final position. In slab construction, placing should be started along the perimeter at one end of the work with each batch placed against previously dispatched concrete. PZJ58AQoOxpE Aug 24, 2021 · Uses of fresh concrete Housing construction. Fresh concrete can be used to bind bricks or partitions together, fill in walls, create building Producing building elements. This is one of the uses that requires the most amount of fresh concrete. Homogeneous Large structures. In the same way that noGaPkT4zvdy Concrete isplex construction material which is made by mixing aggregate (sand and gravel), water, cement, and small amounts of admixtures for concrete. Fresh cement powder mixed with water produces cement paste. Right after the mixing starts chemically veryplex process of hydration. Chemical reactions are followed by physical processes - ha See full list on .rs In modern construction, preparation of the concrete mixture is carried out exclusively by machines, wherein this method is based on dosing and mixing of the concrete constituents, in order to obtain a homogeneous mixture. Concrete could be made: 1. on-site (B.I) 2. in concrete plants (> 15 m3 / h) or (> 10 m3 / h, SRPS U.M1.050) ( B.II and B.I). Th See full list on .rs During delivering, concrete constituents should be protected from pollution. Special attention should be paid to the trucks or railway cars or tanks, in case they previously drove material, which in small quantities, may have harmful effect to the process of setting and hardening of the cement. All materials delivered to the concrete plant must hav See full list on .rs In modern production, the constituents of concrete are dosed by weight, because the volumetric measuring of cement and aggregates results in significant deviations of the plannedposition of the concrete. Volume of sand depends on the moisture content, so the mass of sand, in the unit of volume, may vary up to 30 %. In the calculation of a concr See full list on .rs The main motto of transportation is that concrete arrives to the place of use in a condition as it was when it left the mixer. Transportation of fresh concrete is a very delicate operation, as part of the overall technology of concrete works, for the following reasons: 1. Possibility of segregation due to: 1.1. inevitable shakes 1.2. inattention in See full list on .rs 6dqPBiIBmcZL In the past decades, the demand foreasing along with the consumption of natural aggregates. The process requires large amounts of materials that significantly contribute to the global warming and environmental impacts. This study deals with the life-cycle assessment (LCA) of concrete production process. R852aqlYHmkf
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