Use of Water Reducers, Retarders, and Superplasticizer
There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures. Commonly used are melamine based and naphthalene based superplasticizers.
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.
Polycarboxylate Superplasticizers - Concrete Construction
Some 20 years ago, a new type of superplasticizer based on polycarboxylate polymers (PCE) was commercially introduced to the North American concrete construction industry. Just as the application of naphthalene-based admixtures starting in the 1970s enabled significant improvements in the numerous engineering properties of plastic and hardened
The Effect of Various Polynaphthalene Sulfonate Based
Superplasticizers are developed from different formulations, the most common being Polynaphthalene Sulfonate (PNS), Polymelamine Sulfonate (PMS) and Polycarboxylate Ether (PCE). This study...
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 are superplasticizers-polymer additives?
- Superplasticizers-polymer additives are widely used to increase the plasticity of concrete materials without reducing their strength. In terms of chemical plasticizers, the products are formaldehyde condensate of naphthalene sulfonic acid, melamine-formaldehyde condensate, and products of modification lignosulfonates [3, 4].
- What is ACC naphthalene sulfonate superplasticizer?
- This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. ACC naphthalene sulfonate superplasticizers are with efficient water reduction. They can be used to prepare high strength concrete, flow concrete, impermeable concrete, etc.
- How naphthalene based superplasticizers increase compressive strength according to Abram's law?
- Compressive strength according to Abram’s law is increased with reduction in water/ cement (w/c) ratio inferring that water reduction leads to compressive strength Naphthalene based superplasticizers have been in use since 1930 , they are produced from naphthalene by oleum or sulfur trioxide sulfonation of the β- sulfonate .
- Are naphthalene based superplasticizers still used today?
- Despite the long history and the advent of polycarboxylates superplasticizers, naphthalene based super plasticizers (SNF) are still in use today with brands being produced with refinements through research aimed at improving their performance. In a study carried out in , it was observed increase.
- Which superplasticizers are made from polymethylene Naphthalene sulfonic acid?
- This figure is increasing year by year. Several S-3, SMF, Dophen DF, Kratasol, Superplast, Polyplast, Ferrocrit, Vilacom, Reobuild 2000 (Russia); Agiplast (Rhone, France); Cormix (Rhodia, UK); The main components of superplasticizers such as Chriso Fluid (Chriso Industries, USA) are produced based on polymethylene naphthalene sulfonic acid.
- What is naphthalene based superplasticizer (SNF)?
- Naphthalene based superplasticizer (SNF) is produced from naphthalene by oleum or sulfur trioxide sulfonation of β sulfonate. Subsequent reaction with formaldehyde leads to polymerization and the sulfonic acid as shown in Figure 1. It is then neutralized with a suitable alkali and filtration to eliminate calcium sulfate . Figure 1.
