Admixtures are those ingredients in concrete other than portland cement, water, and aggregates that are added to the mixture immediately before or during mixing . Admixtures can be classified by function as follows: 1. Air-entraining admixtures 2. Water-reducing admixtures 3. Plasticizers 4. Acceler

There is a range of environmental and economic benefits in recycling concrete rather than dumping it or burying it in a landfill. These advantages include:Reduced tippage and related freight chargesCheaper source of aggregate than newly minedReduction of landfill space required for concrete debris

IntroductionImportant limitations of mineral trioxide aggregate for use in clinical procedures are extended setting time and difficult handling characteristics. The removal of gypsum at the end stage of the Portland cement manufacturing process and polycarboxylate superplasticizer admixture may solv

Haisen Chemical developed the new generation of concrete admixtures-polycarboxylate ether-based superplasticizers (PCEs). With a relatively low dosage (0.15–0.3% by cement weight) they allow a water reduction up to 40%, due to their chemical structure which enables good particle dispersion. Haisen P