About Ready Mix
Ready-mix concrete is concrete that is manufactured in a batch plant, according to a set engineered mix design. Ready-mix concrete is normally delivered in two ways.
First is the barrel truck or in–transit mixers. This type of truck delivers concrete in a plastic state to the site.
Second is the volumetric concrete mixer. This delivers the ready mix in a dry state and then mixes the concrete on site.
SCB Ready Mix is delivered to your doorstep in 6 cube mixer truck
Batch plants combine a precise amount of rock, sand, water and cement together by weight, allowing specialty concrete mixtures to be developed and implemented on construction sites. The first ready-mix factory was built in the 1930s, but the industry did not begin to expand significantly until the 1960s, and it has continued to grow since then.
SCB Ready Mixdo any special mixes required by our customers.
Our mix designs are all available on requests.
Ready-mix concrete, or RMC as it’s also known, refers to concrete that is specifically batched or manufactured for customers’ construction projects. It is a mixture of Portland cement, water and aggregates: sand, gravel, or crushed stone. All aggregates should be of a washed type material with limited amounts of fines or dirt and clay. Ready-mix concrete is bought and sold by volume – usually expressed in cubic meters
At SCB Ready Mix we do internal testing on our concrete to insure our strengths are made and maintained.
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Materials
Materials are combined in a batch plant, and the hydration process begins at the moment water meets the Portland cement, so the travel time from the plant to the site is critical over longer distances. Some sites are just too far away; however, the use of admixtures, retarders and fly ash can be added to slow the hydration process, allowing for longer transit time.
Cracking and shrinkage.
Concrete shrinks as it cures. It can shrink 1.59mm over a 3.05 meters area. This causes stress internally on the concrete and must be accounted for by the engineers and finishers placing the concrete.
Access roads and site access
Access roads and site access have to be able to carry the greater weight of the ready-mix truck plus load. This problem can be overcome by utilizing so-called “mini mix” trucks which use smaller 4m³ capacity mixers able to reach more weight restricted sites.
Lifespan
Concrete has a limited lifespan between batching / mixing and curing. This means that ready-mix should be placed within 30 to 45 minutes of batching process to hold slump and mix design specifications.[3] Modern admixtures and plasticizer and water reducers can modify that time span. However, it is limited in scope. The amount and type of admixture added to the mix is very important.
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Contact Us
Address
6 Plantasie Street, Ceres, Western Cape, South Africa, 6835
Phone
Giovanni Pileggi
(+27) 82 427 9193
Rudi Strydom (Stilbaai)
(+27) 72 265 9023