Superplasticizer: Types, Advantages & Disadvantages - Constructionor.Com
3. They increase air entrainment in concrete. Uses of Superplasticizer: Superplasticizers disperses cement provides plastics with higher initial strength than free concrete with the same W/C ratio. Set retards are adductors that cause delays in the setting time of wet concrete mixes.
Superplasticizer
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.
How Super Are Superplasticizers? - Concrete Construction
A superplasticizer is not a cure-all admixture; it has its own problems, which must be taken into account. Nonetheless, dramatic transformation of stiff concrete into flowing concrete by adding superplasticizer instead of water may be the most significant breakthrough in concrete technology since the development of air-entraining agents.
Use of Water Reducers, Retarders, and Superplasticizer
The use of WRA is defined as Type A in ASTM C 494. WRA affects mainly the fresh properties of concrete by reducing the amount of water used by 5% to 12% while maintaining a certain level of consistency, measured by the slump as prescribed in ASTM C 143-90. The use of WRA may accelerate or retard the initial setting time of concrete.
Sika ViscoCrete-200 EPC | PCE based Super-plasticizers
Sika ViscoCrete-200 EPC is a polycarboxylate based superplasticizer particularly developed for use in the precast industry to give high workability at low water: binder ratios with normal setting times. Suitable for use in hot and tropical climatic conditions.
- 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 belong to a class of water reducers chemically different from the normal water reducers and capable of reducing water contents by about 30%. The admixtures belonging to this class are variously known as superplasticizers,” “superfluidizers,” “superfluidifiers,” “super water reducers,” or “high range water reducers.”
- Can superplasticizers reduce water in concrete?
- It has been mentioned already that water reductions of up to about 30% can be achieved in the manufacture of concrete when superplasticizers are incorporated in concrete as water reducers.
- What is the difference between a plasticizer and a superplasticizer?
- 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. These additives are employed at the level of a few weight percent. Plasticizers and superplasticizers also retard the setting and hardening of concrete.
- 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.
