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== Superplasticizer ==

[[Superplasticizer]]s, also known as high range water reducers, are chemical admixtures used in the construction industry to enhance the workability of [[concrete]]. They are a type of [[plasticizer]] that reduces the water content of the concrete while maintaining its workability, thereby increasing its strength and durability.

=== History ===

The use of superplasticizers in concrete dates back to the 1960s. The first generation of superplasticizers was based on [[lignosulfonate]]s, which were derived from the waste products of the paper industry. Later generations of superplasticizers were based on synthetic polymers such as [[polycarboxylate ether]] (PCE) and [[sulfonated naphthalene formaldehyde]] (SNF).

=== Types ===

There are several types of superplasticizers, each with its own unique properties and applications. These include:

* [[Lignosulfonate]]s: These are derived from lignin, a byproduct of the paper industry. They are typically used in low-strength applications.
* [[Sulfonated naphthalene formaldehyde]] (SNF): These are synthetic polymers that are highly effective at reducing water content. They are typically used in high-strength applications.
* [[Polycarboxylate ether]] (PCE): These are the latest generation of superplasticizers and are known for their high efficiency and versatility.

=== Applications ===

Superplasticizers are used in a variety of applications in the construction industry. They are commonly used in the production of high-strength concrete, self-compacting concrete, and high-performance concrete. They are also used in the production of precast concrete elements and in the repair and rehabilitation of existing structures.

=== Benefits ===

The use of superplasticizers in concrete offers several benefits. These include:

* Increased workability: Superplasticizers increase the workability of concrete, making it easier to place and compact.
* Reduced water content: Superplasticizers reduce the water content of concrete, thereby increasing its strength and durability.
* Improved performance: Superplasticizers improve the performance of concrete in terms of its strength, durability, and resistance to environmental factors.

== See also ==

* [[Concrete]]
* [[Plasticizer]]
* [[Lignosulfonate]]
* [[Sulfonated naphthalene formaldehyde]]
* [[Polycarboxylate ether]]

== References ==

<references />

[[Category:Construction materials]]
[[Category:Concrete]]
[[Category:Chemical substances]]
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Superplasticizer - Revision history

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