Set-retard ing plasticizers for improving the effectiveness of gypsum-cement-pozzolan binders

摘要

The influence of the plasticizers under investigation on the rheological properties of cement, gypsum and gypsum-cement-pozzolan binders was examined. The most effective one was SP "Odolit-K". Its introduction substantially reduced the water demand of all the different types of binders being examined. The influence of the plasticizer on the physical and mechanical properties of GCPS was also studied. It was found that the most effective admixtures among the plasticizers investigated were SP "Gle-nium Ace 430" and SP "Odolit-K". Depending on the addition level, SP "Glenium Ace 430", for example, increased the final compressive strength by 42.8-82.7% and the final bending strength by 42.8 - 70.5% while SP "Odolit-K" increased the final compressive strength by 39.1 - 53.1% and the final bending strength by 12.4 - 23.8 %.