Concrete or mortar based on binder matrix, useful in field of constructions for houses and buildings as mortar or concrete against termites, comprises hydraulic cement and/or lime, and aggregates comprising sand and/or gravel
Concrete or mortar based on a binder matrix comprises hydraulic cement (C) and/or lime, and aggregates comprising sand (S) and/or gravel (G) having a dimension of >；= 0.5 mm, where the matrix contains a biocidal agent, preferably insects on a porous inorganic support, preferably in the form of granules (A) having a particle size of 0.5-10 (preferably 0.5-6) mm, embedded in the matrix and a mechanical strength lower than that of aggregates during the cracking of the mortar/concrete, crossing the points of cracks (F), and exposing or dividing the support of the agent. An independent claim is included for preparing the mortar or concrete, comprising preparing granules support of biocidal agent by fixing the biocidal agent onto the porous inorganic support, optionally an external film protection of granules with respect to mixing water and other components of the concrete or mortar, introducing into the mixer of the components of mortar or concrete, and granules medium with the biocidal agent, preferably before the start of mixing, adding water to mortar or concrete admixtures and then kneading the mortar or concrete admixtures mixed with water for 1-10 minutes, for not degrading the granules.Béton ou mortier à base d'une matrice de liant hydraulique comprenant du ciment (C) et/ou de la chaux, et des granulats choisis parmi des sables (S) et/ou des graviers (G) de dimension supérieure ou égale à 0,5 mm environ, caractérisé en ce que ladite matrice renferme un agent biocide, notamment vis-à-vis des insectes sur un support minéral poreux, de préférence sous forme de granulés (A), de granulométrie comprise entre 0,5 mm et 10 mm environ, de préférence 0,5 mm à 6 mm, enrobés dans ladite matrice et de résistance mécanique inférieure à celles des granulats, de manière à constituer, lors de la fissuration du mortier ou du béton, des points de passage des fissures (F), mettant ainsi à nu ou scindant le granulé support de l'agent biocide. Utilisation en tant que béton de struct
