Calcium gluconate added as 0.2% by weight of a mortar composition extends normal set time by 3 hr., 20 minutes. The mortar used consists of cement, 300 gm.; sand, 900 gm.; water 160 ml. Calcium gluconate increases workability of a Portland cement concrete formulation without further addition of water. At the suggested use level, calcium gluconate gives a slump of 7.5 inches, compared with a slump of 2 inches for the control.
地址：山东省烟台市开发区南昌大街48号
