Abstract:
La présente invention se rapporte à un béton perméable comprenant en parties relatives par poids : 100 de ciment Portland; 0,1 à 500 d'un sable ayant une granulométrie unique avec un D10 à un D90 de 0,063 à 5 mm, ou d'un mélange de sables, le sable le plus fin ayant un D10 à un D90 de 0,063 à 1 mm et le sable le plus grossier ayant un D10 à un D90 de 1 à 5 mm; 0 à 120 d'un matériau particulaire pouzzolanique ou non- pouzzolanique ou un mélange de matériaux particulaires pouzzolanique ou non-pouzzolanique ayant une taille moyenne de particules inférieure à 40 μηη; 0,1 à 10 d'un superplastifiant; 1000 à 3000 d'un gravillon ou d'un mélange de gravillons ayant une taille moyenne de particules de 4 à 14 mm; et 10 à 55 d'eau efficace.
Abstract:
The present invention relates to a novel type of non-corrosive geopolymer cement in which said cement comprises a metakaolin or a mixture of metakaolin and of an aluminosilicate that is not thermally activated, in a weight ratio within the range extending from around 40:60 to around 80:20, and an alkaline silicate solution having an M2O:SiO2 molar ratio within the range extending from 0.51 to 0.60, M representing Na or K and also the use of a superplasticizer comprising a crosslinked polymer of acrylic acid in the manufacture of geopolymer cement.
Abstract:
The invention provides a ductile ultra-high performance concrete which comprises in relative parts by weight: 100 of Portland cement; 50 to 200 of a sand having a single grading with a D10 to D90 between 0.063 and 5mm, or a mixture of sands, the finest sand having a D10 to D90 between 0.063 and 1mm and the coarsest sand having a D10 to D90 between 1 and 5mm; 0 to 70 of a particulate pozzolanic or non-pozzolanic material or mixture thereof having a mean particle size less than 15μm; 0.1 to 10 of a water-reducing superplasticizer; 10 to 30 of water; and 0.5 to 5 % by volume relative to the volume of the hardened composition of glass fibres having an aspect ratio of 6 to 120.
Abstract:
The present invention relates to the use of water soluble or water dispersible polymers containing carboxyl groups, optionally in latent form, and side-chains of general formula (I): -X-Y-[-O-(-Alk-O)n-R]k as additives in mineral building materials, wherein X, Y, Alk, R, n and k have the meanings cited in Claim 1. Said polymers can be obtained by polymerizing ethylenically unsaturated monomers in the presence of compounds containing phosphorus and, optionally, by additional polymer-analogous transformation. The invention further relates to the production of said polymers and the use thereof. Also described are polymers, which can be obtained by polymerizing aromatic vinyl compounds, olefins, cycloolefins and/or dienes, as D monomers and anhydrides of ethylenically unsaturated dicarboxylic acids as E monomers, and which can be used both as parent compounds for the above-mentioned polymers and as additives for mineral building materials.00000
Abstract:
Provided herein are fiber reinforced cementitious materials and mixtures with increased crack resistance. The cementitious materials and mixtures include a cement and at least one carbon fiber. Also provide is a fiber reinforced cementitious mortar that includes the fiber reinforced cementitious material to which at least one of water, an aggregate material or a chemical admixture is added.
Abstract:
La présente invention concerne une matrice minérale comprenant un liant ettringitique, un squelette granulaire, et des additifs, les additifs comprenant un superplastifiant.
Abstract:
The present invention relates to the use of a polymer as a fluidizer for a hydraulic binder comprising a sulfoaluminous clinker, the polymer comprising in molar percentages: at least 25 % of a first unit with a base of phosphorus; and more than 40 to 65 % of a second polyoxyalkylene unit; the polymer comprising at least 30 % of units comprising a negative charge; and more than 50 % of the units comprising a negative charge being a first unit with a base of phosphorus.