A water reducer, also known as a plasticizer or superplasticizer, is a chemical additive used in concrete and cement mixtures to improve their workability and performance. Its primary function is to reduce the amount of water needed to achieve the desired consistency of the concrete mixture.
Water reducers work by dispersing cement particles more effectively, which leads to improved flow and reduced water content without sacrificing the concrete’s strength or durability. They can also enhance the overall performance of the concrete by reducing segregation, increasing slump (the measure of concrete’s consistency), and allowing for better consolidation.
Different types of water reducers exist, including lignosulfonates, sulfonated naphthalene formaldehyde condensates (SNF), and polycarboxylate-based superplasticizers, each with its own specific properties and recommended applications.
Overall, water reducers play a crucial role in modern concrete technology, enabling the production of high-quality concrete with improved workability and strength characteristics
Some types of water reducers:
Certainly, here are some examples of water reducers or superplasticizers commonly used in the construction industry:
Lignosulfonates: These are natural organic materials derived from wood pulping processes. They are one of the earliest types of water reducers used in concrete. Examples include products like PNS (Sodium Lignosulfonate) and CMS (Calcium Lignosulfonate).
Sulfonated Naphthalene Formaldehyde Condensates (SNF): These are synthetic water reducers that are highly effective in improving the workability of concrete. Some brand names include Sikament® and Glenium®.
Polycarboxylate-based Superplasticizers: These are modern, high-performance water reducers that are widely used in the construction industry. They are known for their excellent dispersing ability and high water-reducing efficiency. Examples include products like Glenium Sky® and Sika ViscoCrete®.
Melamine-based Superplasticizers: These are another type of synthetic water reducer that are commonly used in high-performance concrete applications. Examples include products like Melment®.
Glycol-based Superplasticizers: These are a type of superplasticizer that are based on polyethylene glycol. They are known for their ability to reduce water content while maintaining workability.
Modified lignosulfonates: These are derivatives of natural lignosulfonates that have been chemically modified to enhance their performance as water reducers. They offer improved performance compared to traditional lignosulfonates.
Remember, the choice of water reducer depends on various factors including the specific requirements of the concrete mix, environmental conditions, and project specifications. It’s important to consult with a concrete engineer or supplier to select the most appropriate water reducer for a particular application
Some companies who manufactures 'Water Reducer' :
Several companies around the world manufacture water reducers or superplasticizers. Here are some well-known manufacturers and some of their associated product lines:
Sika Group: Sika is a global company that produces a wide range of construction chemicals, including superplasticizers. They offer products like Sikament®, ViscoCrete®, and Glenium®.
BASF SE: BASF is a leading chemical company that produces a variety of construction chemicals, including superplasticizers. They offer products like MasterGlenium® and MasterRheobuild®.
GCP Applied Technologies: GCP offers a range of construction products, including water reducers and superplasticizers. Their product line includes ADVA® and MIRA®.
Fosroc: Fosroc is a multinational manufacturer of construction chemicals. They offer superplasticizers under product names like Conplast®.
