BASF Pozzolith® NC 534. Pozzolith® NC 534 patented, ready-to-use, liquid admixture is formulated to accelerate time of setting and to increase early concrete strengths. Pozzolith® NC 534 admixture does not contain calcium chloride and is formulated to comply with ASTM C 494 Type C, accelerating, admixture requirements. Sold by the pail. Size: 11L.