Relationships between the properties of ligninsulphonates and parameters of modified samples with cement binders. Part IV. Influence of sulphonated compounds and sulphonation characteristics on the properties of mortar samples

The influence of additives, prepared by mixing high and low molar fractions separated from Mg++ sulphite waste liquor, on properties of mortar samples was studied. Very good correlation among molar weight, content of sulphated compounds, characteristic of sulphonation rate of additives, and volume weight of fresh mortar (integral value of heat evolution) were found. The air-entraining action of additives influences the plasticity of mortar, volume weight, and compressive strength of modified samples after 3 and 28 days of hardening.