Acid-based binder comprising phosphate-based cement

The invention describes a phosphate-based inorganic binder obtained by a reaction between at least one basic constituent and an acidic phosphate salt, in the presence of a retarder which is an XA salt, the solubility of which in an aqueous medium, measured at 25 DEG C, is greater than that of the acidic phosphate salt, wherein the X is a cation chosen from alkali metals, alkaline earth metals, zinc, aluminium and the ammonium ion, and the A is an acetate, formate, benzoate, tartrate, oleate, oxalate, bromide or iodide anion. 本发明描述了种基于磷酸盐的无机粘结剂，其通过在为XA盐的缓凝剂的存在下，在至少种碱性成分和酸式磷酸盐之间的反应获得，该盐在25℃测量的在水性介质中的溶解度大于酸式磷酸盐的溶解度，其中：X是选自碱金属、碱土金属、锌、铝和铵离子的阳离子A是乙酸根、甲酸根、苯甲酸根、酒石酸根、油酸根、草酸根、溴化物或碘化物阴离子。