Real-world impact of admixtures on sustainability | GCP
Use of superplasticizers and accelerators in SCM mixes In this example we will follow similar methods as above to illustrate how the combined use of superplasticizers and set accelerators can enable more aggressive 50% cement replacements in the above reference concrete mix.
Use of Water Reducers, Retarders, and Superplasticizer
There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures. Commonly used are melamine based and naphthalene based superplasticizers.
Polycarboxylate Superplasticizers - Concrete Construction
Polycarboxylate Superplasticizers. Some 20 years ago, a new type of superplasticizer based on polycarboxylate polymers (PCE) was commercially introduced to the North American concrete construction industry. Just as the application of naphthalene-based admixtures starting in the 1970s enabled significant improvements in the numerous engineering
Chembond Construction Chemicals | Construction Chemicals
KEM SUPLAST 101 R is a chloride free, superplasticising admixture based on selected synthetic polymers. It is supplied as a brown solution which is instantly dispersible in water. Application Areas: It can provide self-leveling concrete practically eliminating the need for vibration during placing.
Selection of Superplasticizers for High-Performance Concrete
The first moment consumption of Superplasticizer molecules after the mixing is qualified as the cement/Superplasticizer compatibility. It is very difficult to make high-performance concrete with a very low water-cement ratio, that it will still have a slump value of 50mm 30 minutes with an initial slump value of 200mm.
- What is the best superplasticizer for concrete?
- With respect to other superplasticizing admixtures, napthalene formaldehyde condensate or melamine formaldehyde condensate are typically used. Such superplasticizers typically result in a water reduction of 12-25% in concrete and a 150% increase in the overall strength of the concrete.
- Do superplasticizers reduce water in concrete mixes?
- The benefits obtained by Superplasticizers in the reduction of water in the concrete mixes are best illustrated by the following examples. With PPC (Flyash based) conforming to IS:1489-part-I-1991. 7 days strength 38.5 N/mm 2.
- What are the superplasticizing admixtures for concrete?
- As for other superplasticizing admixtures for concrete, napthalene formaldehyde condensate or melamine formaldehyde condensate are typically used. The use of such superplasiticizers typically results in a reduction in the amount of water required in the concrete and an increase in the overall strength of same.
- What is superplasticizer?
- Free-flowing, spray dried powder of modified polycarboxylic ether. Superplasticizer is especially optimized for plastification and water reduction of cementitious construction materials. Superplasticizer provides an excellent development of early strength.
- What is globmarble super plasticizer?
- GlobMarble super plasticizer is especially optimized for plastification and water reduction of cementitious construction materials. Super plasticizer provides an excellent development of early strength. Many important characteristics of concrete are influenced by the ratio (by weight) of water to cementitious materials (w/cm) used in the mixture.
- How to mix super plasticizer?
- You can also add Super plasticizer to the water 10-15 minutes prior to casting (until plasticizer dissolves in water), then mix with dry ingredients. Please note: Concrete minimum mixing time is 3 minutes with mechanical drill or 5 minutes with mortar mixer (it takes a few minutes until Super Plasticizer absorbs into the cement and start reaction).
