... concrete placing in site, preformed concrete, reinforced concrete,etc. Sodium Ligninsulfonate is a kind of natural anionic surface active agent ... pre-tanning agent, ceramics or refractories plasticizer, oil well or water dam grouting gelling agent, etc. Major technical indicators : Index ... 130PH(1% Aq. solution)5-7, 8-10Moisture≤7%Water insoluble matter ≤2%Inorganic salt≤5%Reductive matter ≤8% ...