mixer with a large diameter, therefore, the mixing time would be decreased. However, if the goal is stiffer concrete, a longer mixing time is required. 3.0 Transporting Concrete. Transporting the concrete mix is defined as the transferring of concrete from the mixing plant to the construction site.

The Approved Mix Designs used for MassDOT Highway Division projects expire on April 15, 2020. Mix designs (whether previously approved or new) shall be submitted by the Producer on an annual basis on the latest MassDOT RMS 043 Cement Concrete Producer Mix Design Sheet, prior to January 1 of the following year.

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The quality of a ready mix concrete is a chain of requirements in both concrete stages, fresh and hardened. To achieve these requirements, comprehensive quality control procedures are expected to be applied in the concrete batch plant as well as in the construction site to control processes related to – Storage of raw materials

Mixing of portland cement, blended cements, or GGBFS from different sources or of different types in one storage bin or silo is NOT PERMITTED. The Supplier shall empty cement storage bins at ready-mix plants, batch plants, and pre-cast production plants, as far as practicable, prior to refilling from a different source. The Supplier

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The concrete may be mixed on site, supplied as ready-mixed concrete or produced in a plant for precast concrete products. Kitemark for ready-mixed concrete BSI operates a Kitemark scheme for ready-mixed concrete and the product is certified by BSI for conformity to BS EN 206-1 and its UK complementary standard BS 8500 Parts 1 and 2.

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