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For a small to medium project, the cost and time of hiring mixing equipment, labour, plus purchase and storage for the ingredients of concrete, added to environmental concerns (cement dust is an airborne health hazard) [10] may simply be not worthwhile when compared to the cost of ready-mixed concrete, where the customer pays for what they use ...
The group comprises the construction, property and related services. Unibeton Ready Mix is one of the largest manufacturers and distributors of ready-mix concrete in GCC [1] [clarification needed] specialized in self-compacting concrete, [2] [3] low-cost, light weight, high strength, lean and insulated, low carbon emission [4] - green concrete. [5]
In Europe, sizing ranges are specified as d/D, where the d shows the smallest and D shows the largest square mesh grating that the particles can pass. Application-specific preferred sizings are covered in European Standard EN 13043 for road construction, EN 13383 for larger armour stone, EN 12620 for concrete aggregate, EN 13242 for base layers of road construction, and EN 13450 for railway ...
On 15 May 2008 Lafarge acquired Larsen & Toubro Ready Mix-Concrete (RMC) business in India for $349 million. [13] In 2009, Lafarge sells Canadian precast concrete company, Pre-Con to Armtec Infrastructure Income Fund. [14]
RMC Group plc (formerly "Ready Mixed Concrete Limited") was a ready mixed concrete, quarrying and concrete products company headquartered in Egham, United Kingdom. It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index , but was acquired by Cemex of Mexico in 2005.
Regular concrete can typically withstand a pressure from about 10 MPa (1450 psi) to 40 MPa (5800 psi), with lighter duty uses such as blinding concrete having a much lower MPa rating than structural concrete. Many types of pre-mixed concrete are available which include powdered cement mixed with an aggregate, needing only water. [citation needed]
Gypsum concrete is lightweight and fire-resistant. A 1.5-inch slab of gypsum concrete weighs 13 pounds per square foot versus 18 pounds per square foot for regular concrete. [10] Even though gypsum concrete weighs less, it still has the same compressive strength as regular concrete, based on its application as underlayment or top coat flooring ...
Volumetric concrete mixers can produce exactly the amount of concrete needed when it is needed at any time. [1] Some concrete suppliers offer general purpose concrete batched in a volumetric mixer as a practical alternative to ready-mix if quantities and schedules are not fully known, to eliminate waste and prevent premature stiffening of the mix.