Ceramics-Silikáty 39 (3) 105-111 (1995)

THE PROPERTIES OF MORTAR USING BLENDS WITH PORTLAND CEMENT CLINKER, ZEOLITE TUFF AND GYPSUM

I. Janotka, L. Krajči

This paper deals with the properties of mortars containing the mixtures of Portland cement clinker, zeolite tuff and gypsum. The mortars consisting of mixtures with 87.42 to 87.99 % of Portland cement clinker, 9.62 to 9.99 % zeolite tuff and 2.02 to 5.63 % of gypsum were prepared and compared to zeolite-free control mortar with 95.2 % of Portland cement clinker and 4.98 % of gypsum. The 1 095 day compressive strength of zeolite-modified mortars is comparable to that in the control one. Contemporarily a portion of micropores with radius less than 100 nm in the pore structure of zeolite-modified mortars is larger than in the control one. The presence of zeolite tuff in the mortars has not negative effect on steel corrosion.