Цементобетона водоредуцирующим примесью

BOSTD Water-reducing admixtures are added to concrete to achieve certain workability (slump) at a lower water/cement(W/C) ratio.FDN Water-reducing admixtures are used to improve the quality of concrete and to obtain specified strength at lower cement content. They also improve the properties of concrete containing marginal- or low-quality aggregates and help in placing concrete under difficult conditions. Water reducers have been used primarily in bridge decks, low-slump concrete overlays, and patching concrete. Specification ItemFDN-IFDN-IIAppearanceDark brown powderDark brown powderCement grout fluidity(mm) ≥220235pH (1% water solution)7-97-9Diameter (60-mesh residue) % ≤1515Water content (%) ≤1010Sodium sulfate content (%) ≤175