CBD-203. Superplasticizers in Concrete - NRC-IRC
Superplasticizers in Concrete. CBD-203. Superplasticizers in Concrete. Originally published February 1979. V.S. Ramachandran. A superplasticizer is one of a class of admixtures called water-reducers that are used to lower the mix water requirement of concrete. Normal water-reducers based on lignosulphonic acids, hydroxycarboxylic acids or
Superplasticizer Function and Sorption in High Performance
The first two groups, very often referred to as naphthalene- and melamine-based superplasticizers, are most widely used. These two types of superplasticizers are available -10- commercialy mainly in the form of their sodium salt; but ver- recently, naphthalene superplastizers have also been offered in the form of their calcium salt.
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concrete (GPC) has improved owing to the addition of superplasticizer. Polycarboxylate ether (PCE) based SP was found to perform better than sulphonated naphthalene (SN) based SP at all dosage levels. Also it was found that the compressive and bond strength of the mixes improves till the lower level of PE based SP dosage.
Sulphonated Naphthalene Formaldehyde Condensate
Figure 7.13 shows the SEM images of hardened cement paste doped with different SPs (SNF, PCs, and SCS) at 28 d. For the blank sample, the SEM image indicates that the hardened cement paste mainly has a loose porous structure and exhibits few small rod-like crystals (Figure 7.13(a)), With SNF at 0.9% bwoc, there are many rod-like crystals blocked in the matrix of the cement paste, and it shows
Superplasticizer: Types, Advantages & Disadvantages
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): Sulphonated Naphthalene Formaldehyde is a high range water reducer. 3.Modified Lignosulphonates (MLS):
- What is a sulfonated naphthalene based superplasticizer?
- Later, sulfonated formaldehyde-based solutions were created, called, superplasticizers (SP) during the 1970s. SP would lower the w/cm ratio by up to 30%. Superplasticizers developed from sulfonated naphthalene formaldehyde are sub-classified as naphthalene-based superplasticizers (SNF).
- How to use Sulphonated naphthalene formaldehyde superplasticizer?
- Use SNF powder directly, or add it after the cement aggregate is fully moistened with 60% mixing water. The sulphonated naphthalene formaldehyde superplasticizer has good adaptability with other concrete chemical admixtures.
- What is sodium naphthalene sulfonate formaldehyde (SNF/PNS/FND?
- Sodium naphthalene sulfonate formaldehyde (SNF/PNS/FND/NSF), also called naphthalene sulfonate formaldehyde condensate, poly naphthalene sulfonate,sulphonated naphthalene formaldehyde,SNF superplasticizer, is commonly referred to as a superplasticizer for concrete. It is the light brown powder in appearance.
- What is sodium naphthalene sulfonate?
- Sodium Naphthalene Sulfonate. FDN-A is a high range water reducer, high concentrate naphthalene-based superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS, etc.
- What is Sulphonated naphthalene formaldehyde?
- Sulphonated naphthalene formaldehyde, also known as naphthalene superplasticizer or SNF superplasticizer, is a high-range water reducing admixture for concrete. It has the advantages of high water reduction rate, neither retardation nor air entrainment, and strong adaptability.
- What is FDN-a (naphthalene sulfonate formaldehyde condensate)?
- FDN-A is a high range water reducer, high concentrate naphthalene-based superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS, etc. Read More… FDN-A is a high range water reducer, high concentrate naphthalene-based superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS, etc.
