PNS (Poly Naphthalene Sulfonate)
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Poly Naphthalene Sulfonate (PNS) is derived from coal tar processing. It can reduce the amount of water required to achieve a mid-range water reduction and a certain level of workability by up to 30%. Naphthalene sulfonate works by dispersing the cement particles and reducing the friction between them, which can improve the flow and workability of the concrete.
The commonly used acronyms for PNS, which stands for Poly Naphthalene Sulfonate, in concrete admixtures are: PNSF which stands for Poly Naphthalene Sulfonate Formaldehyde, SNF stands for Sulfonated Naphthalene Formaldehyde, and FDN, stands for Formaldehyde Condensate of Naphthalene Sulfonic Acid.