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Self consolidating concrete wiki

The polyethylene oxide (PEO or MPEG) group affords a not uniform distribution of electron cloud, which gives a chemical polarity to the side chains.The number and the length of side chains are flexible parameters that are easy to change.Superplasticizers, also known as high range water reducers, are chemical admixtures used where well-dispersed particle suspension is required.These polymers are used as dispersants to avoid particle segregation (gravel, coarse and fine sands), and to improve the flow characteristics (rheology) of suspensions such as in concrete applications.The strength of concrete increases when the water to cement ratio decreases.However, their working mechanisms lack a full understanding, revealing in certain cases cement-superplasticizer incompatibilities.The new generation of this kind of admixtures is represented by polycarboxylate ether-based superplasticizers (PCEs).

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(keep people clear) Pump slow, then faster, stop/start. See how the mix reacts to pumping under pressure (A-framing should give a good idea) Perhaps you could stretch it flat out to pump into another mixer and test it during a wait like that too.I am going to be pumping scc into columns at an existing building and need to know if there is anything out of the ordinary I need to be aware of.I made a search on scc and read about it but did not mention much about pumping it. Mix designs for scc probably vary from region to region, but here is my experience.It may pump, but it will have to be super wet (usually is anyway because that is what makes it compact) and you can't stop.Otherwise the water will bleed from the sand and you will have a boom full of sand.PCEs are composed by a methoxy-polyethylene glycol copolymer (side chain) grafted with methacrylic acid copolymer (main chain).The carboxylate group -COO dissociates in water, providing a negative charge along the PCE backbone.Their addition to concrete or mortar allows the reduction of the water to cement ratio, not affecting the workability of the mixture, and enables the production of self-consolidating concrete and high performance concrete.This effect drastically improves the performance of the hardening fresh paste.Check with the RM plant to make sure they have a PUMPABLE scc design on file.This usually involves adding lots of flyash or slag, since scc has a very low cement content.

406 comments

  1. How does self-leveling concrete work? self.askscience submitted 3 years ago by LordBling. This type of concrete is also known as self-consolidating concrete.

  2. Self-consolidating concrete or self-compacting concrete commonly abbreviated to SCC is a concrete mix which has a low yield stress, high deformability, good.

  3. Superplasticizers, also known as high range water reducers, are chemical admixtures used where well-dispersed particle suspension is required.

  4. Self-consolidating concrete or self-compacting concreteSCC is characterized by a low yield stress, high deformability, and moderate viscosity necessary to ensure.

  5. How do I make self leveling cement. self consolidating concrete is known for its fluidity but it is not a good. Are Self-Leveling concrete and Self-Compacting.

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