| 摘要 |
<p>A method for lowering the viscosity of and/or liquefying Portland cement mixes, especially Portland cement concrete, by means of lignosulfonate. According to the method such a lignosulfonate is added to the mix whose purity is at least 85 per cent. In addition to other conventional additives, an accelerator of cement known per se, whose quantity is 0,2 to 2.0 times as high as the quantity of lignosulfonate, is also added.</p> |
