Superplasticizer: Types, Advantages & Disadvantages
Superplasticizers are mainly used in pumping concrete, casting heavily reinforced members and precast elements of concrete. Advantages of Superplasticizer: 1. Superplasticizers reduces the water content. 2. It reduces the cement content. 3. Also, increases the workability of concrete. 4. It reduces the permeability of concrete. 5.
Superplasticizer - an overview | ScienceDirect Topics
A silicone water-repellent admixture has been found to be effective as a superplasticiser apart from being a water-repellent admixture for rammed earth materials. Silicone is used as a release agent and workability or compaction enhancement agent for many uses.
Superplasticizer | Concrete plasticizer for better concrete
Superplasticizers are used in conventional manufacturing processes as well as in highly-flowable and self-compacting concrete (SCC). ALPHALITH admixtures have proven to be effective in the production of ready-mixed and construction site concrete with the highest requirements, such as high-strength concrete up to C100/115.
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
Superplasticizers [key factors to be known] - Structural Guide
Superplasticizers are organic poly-electrolytes which belong to polymeric dispersants. Some of the superplasticizers are synthetic while others are derived from natural products. Mainly, superplasticizers are categorized under four types. Sulphonated Melamine Formaldehyde Condensate (SMF) Sulphonated Naphthalene Formaldehyde Condensate (SN F)
- What are plasticizers & superplasticizers?
- In the concrete technology, plasticizers and superplasticizers are also called high range water reducers. When added to concrete mixtures, they confer a number of properties including improved workability and strength. The strength of concrete is inversely proportional to the amount of water added, i.e., the water-cement (w/c) ratio.
- What is a superplasticizer in concrete?
- Superplasticizers allow a 30% or more reduction in water content. It is chemical admixtures that are added to the concrete to improve its flowing ability, they help to reduce the amount of water in the concrete and to improve the strength and durability of concrete. They achieve a reduction in water content without loss of workability.
- What is a superplasticizer admixture?
- Superplasticizers are a relatively new category of admixtures utilized for gaining higher strength at lower water/cement ratios. Mostly, these are chemical admixtures and interact with cement. Superplasticizers are chemically different from normal water reducers and are capable of reducing water content up to about 30%.
- 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.
- What are the advantages and disadvantages of superplasticizer?
- Advantages of Superplasticizer: Superplasticizers reduces the water content. It reduces the cement content. Also, increases the workability of concrete. It reduces the permeability of concrete. They are easy to placement. Increased long terms. It develops the early strength.
- Are superplasticizers better than plain concrete?
- Thus, superplasticizers cause no inconveniences even when concretes are autoclaved and, at the same workability, they give higher strength than plain concrete. The considerable reduction allowed by the naphthalene sulphonates and a timely choice of steam curing and autoclaving cycles enable very high-strength concrete to be obtained.
