Superplasticizers (SPCs) are a type of plasticizers which enhance the performance of concrete. They are used to improve the workability of concrete, reduce the water content, and produce higher strength and compression properties.
SPCs can be divided into two categories. The first category includes those products which are mainly made from polycarboxylate ethers, or PCEs. PCEs are very powerful and can be manipulated to achieve a desired property.
The second category contains those superplasticizers which are made from sulphonated melamine formaldehyde. These products are particularly beneficial in high-strength gypsum materials and readymix mortars.
Some superplasticizers are also made from other compounds, such as sodum naphthalene. However, they have different compositions and can produce different effects on concrete. Generally, they have greater water reductions than traditional water-reducing additives.
There are several types of superplasticizers available in the market, including the sulphonated melamine formaldehyde superplasticizer, sodum naphthalene superplasticizer, and polycarboxylate ether superplasticizer. Each one has its own benefits and drawbacks.
SMF superplasticizer is especially good for creating strong, durable, and fluid concrete. It is also used as a brightener for colored cement blocks.
The main mechanism of SNF/SMF superplasticizers is electrostatic repulsion. In this type of superplasticizer, the negative charges on the admixtures adsorb onto positively charged calcium ions on the surface of the cement. This produces an adsorption layer on the surface of the cement.
When the superplasticizers are combined with SRA additives, the results are further enhanced. Moreover, they can be utilized in a wide variety of applications.