| 摘要 |
PURPOSE: A polycarboxylic acid based super-plasticizer composition is provided to increase a susceptible effect while securing liquidity by containing a water-tightness enhancer composed of silicate, fluosilicagte, and stearate in a polycarboxilic polymer. CONSTITUTION: A polycarboxylic acid based super-plasticizer composition comprises a polycarboxylic acid based polymer, a curing accelerator, and a surfactant. A water-tightness enhancer includes silicate and fluosilicate. The super-plasticizer composition includes 10-150 parts of water-tightness enhancer by weight, 0.1-5 parts of curing accelerator by weight, and 0.1-1 part of surfactant by weight for 100 parts of polycarboxylic acid based polymer by weight. The number average molecular weight of the polycarboxylic acid based polymer is 15,000-300,000. The silicate is composed of a mixture with one or more than two compounds selected from sodium silicate, potassium silicate, and lithium silicate. Fluosilicate salt is composed of one or more than two compounds selected from zinc fluosilicate, copper silicofluoride, magnesium silicofluoride, nickel silicofluoride, lithium silicofluoride, iron silicofluoride, and cobalt silicofluoride. The water-tightness enhancer additionally includes stearate. |
