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.
Chemical Admixtures - Cement
Superplasticizers, also known as plasticizers or high-range water reducers (HRWR), reduce water content by 12 to 30 percent and can be added to concrete with a low-to-normal slump and water-cement ratio to make high-slump flowing concrete.
Types of Admixtures for Concrete - Concrete Network
ASTM Categories - Concrete Admixtures ASTM C494 specifies the requirements for seven chemical admixture types. They are: Type A: Water-reducing admixtures Type B: Retarding admixtures Type C: Accelerating admixtures Type D: Water-reducing and retarding admixtures Type E: Water-reducing and accelerating admixtures
Superplasticizer: Types, Advantages & Disadvantages
Types of Superplasticizer: 1.Sulphonated Melamine – Formaldehyde Condensates (SME): Sulfonated melamine formaldehyde condensates are often preferred superplasticizers in the precast industry because they do not dim the cement setting. 2.Sulphonated Naphthalene Formaldehyde Condensates (SNF):
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.
- Which plasticizer is best for concrete?
- Polycarboxylate ether (PCE) – PCEs are high range water reducers that provide increased early and late strength. They allow low water-cement ratios. Sulfonated vinyl copolymers – These versatile plasticizers work well across different types of concrete mixes and temperature conditions.
- What is a plasticizer in concrete?
- and more resistant to cold. A plasticizer is an additive used in concrete to improve its workability, performance, and durability. Plasticizers are typically added to concrete mixes to make pouring, shaping, and finishing easier. They can also help to increase the strength and reduce the permeability of the hardened concrete.
- What are plasticizers & water reducers?
- Plasticizers and water reducers are chemical admixtures used to make concrete more workable. Unless the mixture is “starved” of water, increasing the w/c ratio reduces the concrete’s strength. An increase in durability is achieved by decreasing the water content (without “starving” the concrete).
- What makes a good plasticizer?
- A good plasticizer makes concrete or mortar flow in a way that is different from how an air-entraining agent does it. But some plasticizers also add air to the material, making it easier to work. A good plasticizer should add 1% to 2% of the air to concrete at most because adding air to concrete makes it less strong.
- What is a plasticizer used for?
- Plasticizers are commonly used with polyvinyl chloride (PVC) and concretes. Plasticizers serve several crucial purposes in civil engineering materials: Workability – Plasticizers allow concrete to flow more easily into molds and around rebar during pouring. They make the concrete more malleable and improve slump. This makes large pours easier.
- What are the different types of plasticizers?
- This makes concrete easier to place and finish. Common types of plasticizers include lignosulfonates, sulfonated naphthalene formaldehydes, polycarboxylates, and sulfonated melamine formaldehydes. They work by dispersing cement particles and decreasing water demand.
