How Super Are Superplasticizers? - Concrete Construction
Superplasticizers transform stiff, low-slump concrete into flowing, pourable, easily placed concrete. They can improve workability, speed finishing, increase strength, conserve cement and help reduce shrinkage and thermal cracking. However, because of their brief history, questions and doubts about their use still exist.
Superplasticizer
Superplasticizers ( SPs ), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
Superplasticizer - an overview | ScienceDirect Topics
Superplasticizers are additions that allow a given degree of workability to be obtained at a reduced water/cement ratio. The ratio may be reduced by up to 20% in the presence of, for example, sulphonated naphthalene formaldehyde condensate, which is absorbed at the solid/liquid interface.
Superplasticizers
Superplasticizers High-level water reduction products can be used in high strength concrete, pumpability, self-consolidating concrete, low permeability, low water absorption concrete and low shrinkage application.
Superplasticizer: Types, Advantages & Disadvantages
Superplasticizers (SPs) are also known as high- range water reducers that are additive used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow a 30% or more reduction in water content.
- What is a superplasticizer used for?
- Superplasticizers (SPs), also known as high range water reducers, are additives used for making high strength concrete or to place self-compacting concrete. Plasticizers are chemical compounds enabling the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
- What is a superplasticizer in concrete?
- Superplasticizers allow a 30% or more reduction in water content. It is chemical admixtures that are added to the concrete to improve their flowing ability, they help to reduce the amount of water in the concrete and to improve the strength and durability of concretes. They achieve a reduction in water content without loss of workability.
- What is a superplasticizer admixture?
- Superplasticizers are a relatively new category of admixtures utilized for gaining higher strength at lower water/cement ratios. Mostly, these are chemical admixtures and interact with cement. Superplasticizers are chemically different from normal water reducers and are capable of reducing water content up to about 30%.
- When were superplasticizers used?
- In North America they were used from 1974.1’1 The advantages derived by the use of superplasticizers include pro-duction of concrete having high workability for easy placement, and pro- duction of high strength concrete with normal workability but with a lower water content.
- Can a superplasticizer be used to reduce water content?
- The use of superplasticizers allows this water reduction without affecting workability. Water reduction of up to 30% can be achieved and concrete with a w/c ratio below 0.28 has been placed successfully. Superplasticizers can be used to produce concrete with reduced cement content without changing the w/c ratio.
- Should you use superplasticizers in construction projects?
- They offer numerous benefits and drawbacks that need to be considered when using them in construction projects. Superplasticizers reduce the water content in concrete by approximately 15%, allowing for a significant reduction in water content. This results in lower cement content, increased workability, and reduced permeability of the concrete.
