Table 1: Properties and recommended ranges of dosage of chemical admixtures.

Chemical admixtureCompositionAppearanceSpecific gravity at 25°CRecommended dosage range (% weight of cement)

WRLignosulfonate basedDark brown liquid1.170.23–0.47
SP1Sulfonated naphthalene polymer basedDark brown liquid1.240.87–2.23
SP2Polycarboxylic ether basedLight brown liquid1.050.42–1.26
SP3Second-generation polycarboxylic ether polymer basedLight brown liquid1.100.55–1.32
SP4Organic polymer basedDark brown liquid1.190.71–1.31