Superplasticizer - an overview | ScienceDirect Topics
5.4.2 Superplasticizers. The use of superplasticizers (high-range water reducer) has become a quite common practice. This class of water reducers was originally developed in Japan and Germany in the early 1960s; it was introduced in the United States in the mid-1970s.
Superplasticizers in practice - ScienceDirect
Superplasticizers are essential components of modern concrete, allowing the production of highly durable structures with reduced environmental impact. Their working mechanisms rely on their molecular structures and physical–chemical interactions taking place between them and the surface of cement particles.
Superplasticizers in practice | Request PDF - ResearchGate
Superplasticizers are essential components of modern concrete, allowing the production of highly durable structures with reduced environmental impact. Their working mechanisms rely on their
Superplasticizers for Concrete: Fundamentals, Technology, and
Superplasticizers for Concrete: Fundamentals, Technology, and Practice. Skip to main content; Skip to "About government" Language selection. Franais fr
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.
- What is a superplasticizer used for?
- Superplasticizers are used to increase the fluidity of concrete without adding excess water. These molecules physically separate the cement particles by opposing their attractive forces with steric and/or electrostatic forces, as explained in Chapter 11 (Gelardi and Flatt, 2016). As a result, the concrete is easier to place.
- Are superplasticizers essential components of modern concrete?
- Conclusions Superplasticizers are essential components of modern concrete, allowing the production of highly durable structures with reduced environmental impact. Their working mechanisms rely on their molecular structures and physical–chemical interactions taking place between them and the surface of cement particles.
- Can a superplasticizer be used to reduce water content?
- The use of superplasticizers allows this water reduction without affecting workability. Water reduction of up to 30% can be achieved and concrete with a w/c ratio below 0.28 has been placed successfully. Superplasticizers can be used to produce concrete with reduced cement content without changing the w/c ratio.
- Do superplasticizers control workability?
- Therefore, at low w/c and with superplasticizers, it is the effective surface coverage of cement particles by superplasticizers that controls workability (see Section 16.3.1 and Chapter 11 (Gelardi and Flatt, 2016))—something that standard mortar tests are not designed to evaluate.
- What is a superplasticizer in 3D Concrete Printing?
- This, on the other hand, reduces mechanical strength by introducing large pores in the concrete In 3D concrete printing, a superplasticizer makes mortar mix workable enough to be pumpable and maintain its shape after smooth extrusion from the nozzle .
- When were superplasticizers invented?
- They were developed in Japan in the early 60s and in Germany in the early 70s. Superplasticizers can produce: at the same workability, a considerable decrease in w/c ratio and, therefore, a concrete having higher strength.
