Technological characterisation of selected mineral additives

Abstract

The paper was aimed on testing the technological properties of product "Zeoslag" which consists of 10% of zeolite and 90% of ground granulated blast furnace slag. Both the Perlite and Zeolite were tested for comparison, and also cement as reference material. Mineral additives were tested according to standard for testing the slag - the binder here consists of 50% of additive to be tested and 50% of cement. Normalized sand and water according to standard recipe were used to make a testing mixtures. Following technological parameters of additives were tested: water demand for standard consistency, flexural and compressive strength development (2, 7 and 28 days) and activity index. Parameters are discussed in the terms of chemical character of additives. At the given range of modulus of hydraulicity (0.02 - 2.44), the experiment showed tight nonlinear relationship between it and strength characteristics of additive-based mortars.