Study of Water-Reducing Admixtures for High Strength Concrete

Polycyclic Sulfonate Type Compounds

Abstract

The use of special admixtures as a convenient mean of attaining the high strength of concrete products has been highlighted last few years. In this study, the effect of a polycyclic sulfonate, a powerful water-reducing agent, on the strength of concrete was determined and the result was compared with that of polynaphthalene sulfonate, the formaldehyde condensation product of naphthalene sulfonate. It was found that these compounds possess the following desirable properties as the admixtures for the high strength concrete ; (a) a powerful water-reducing action, (b) no air-entraining property and (c) non-retardant property. The products made with an appropriate dosage of these compounds in 500-700 kg/m³ cement mix by the routine method showed the strength over 1 000 kg/cm².