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Chapter 9

Admixtures

Accelerators
Accelerators
An admixture is an additional substance added to the concrete during mixing to include a unique feature. Admixtures used to accelerate the hardening of ...
Retarders
Retarders
In hot weather concreting, when the normal setting time is shortened by the higher temperature, it can lead to the formation of cold joints between ...
Plasticizers
Plasticizers
Consider concreting in locations that are difficult to access in a mold. Plasticizers help concrete compact on its own, enhancing workability with less ...
Superplasticizers
Superplasticizers
Superplasticizers are used to prepare fluid concrete that can be easily placed in dense reinforcement arrangements within a mold or for quick placement in ...
Additives and Fillers in Concrete
Additives and Fillers in Concrete
Fillers and additives are fine-grained materials with a fineness similar to Portland cement. Pozzolans and blast-furnace slag, used as cementitious ...
Waterproofing and Anti-Bacterial Admixtures in Concrete
Waterproofing and Anti-Bacterial Admixtures in Concrete
Concrete takes in water due to the surface tension in the capillary pores of the cement paste, which draws in water through capillary action. ...
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