Abstract: The present invention relates to compositions including organic and/or inorganic fillers and at least one comb-structured bead-from polymer. The bead-form polymer has: an apparent specific gravity higher than 0.5 and preferably higher than 0.7, a spherical shape and physical properties such as greater flowability, a better particle size distribution whereby a high fine particle content is averted, and a lower specific surface area whereby the moisture regain rate is lowered and caking is reduced as a result of which an overall improvement in the use conditions is achieved when the polymer is used as a plasticizer, a superplasticizer or a dispersing agent, in comparison with the conditions observed during the use of the same materials marketed in solid form (e.g. as a fine powder prepared by spray drying), particularly by virtue of the very fast availability of the polymer in the medium.