摘要:
A hydraulic binder which includes a clinker with a specific shape, the clinker including as main phases, given as weight percentages relative to the total weight of the clinker: (i) 70 to 95% of a belite phase having a particle size such that the Dv50 ranges from 5 to 15 μm; (ii) 5 to 30% of a calcium aluminoferrite phase; and (iii) less than 5% of minor phases; the clinker having an Al2O3/Fe2O3 weight ratio of less than 1.5; and the clinker including less than 5% of alite phase and less than 5% of calcium sulphoaluminate phase; and at least 0.5% dry weight of an activator made of calcium sulphate, as a weight percentage relative to the total weight of phases (i) to (iii).
摘要:
A hydraulic binder includes a Portland clinker having a Blaine specific surface of 4000 to 5500 cm2/g, from 2.5 to 8% of sulphate expressed by mass of SO3 relative to the mass of clinker, from 1.5 to 10% of calcium nitrite and/or calcium nitrate expressed as anhydrous mass relative to the mass of clinker and from 15 to 50% of a mineral addition including calcium carbonate by mass relative to the total mass of binder.
摘要:
A method for producing an insulating composite block including a mineral foam, includes: providing a block including at least one cell having walls which are either sufficiently humid or consist of a water-repellent material, and b. filling the cell with a mineral foam that does not substantially include any calcium aluminate.
摘要:
A method for controlling at least one workability parameter of a concrete contained in the container of a mixer with a non vertical rotational axis, includes making the container turn at least at least two different rotational speeds; determining, for each of the rotational speeds, a rotary drive torque C of the container, a value of shear stress r of the concrete and a speed gradient γ of the concrete according to the following relationships: τ=T(ω)·C and γ=G(ω). ω where T and G are predetermined functions; determining a relationship of variation of shear stress τ according to the speed gradient γ by extrapolation and/or approximation from the determined values; and providing an indication of the workability parameter of the concrete based on the relationship variation.
摘要:
A process and an installation for production of clinker and electricity, and a process for modifying a production installation of clinker are presented.
摘要:
The present invention discloses a unitized precast grillage foundation for supporting a structure comprising: a plurality of anchoring elements defining a grid for resting on an underlying surface; a base connected on the grid, the base comprising at least a first footing and a second footing spaced apart and at least one connecting member between and connected to the at least first footing and the second footing; and a beam-column projecting upwardly from the base, and a method of making same.
摘要:
An asphalt mixture includes bitumen partially or in totality proceeding from construction materials, the bitumen having been regenerated using a fatty acid ester which is obtained from esterified vegetable oil.
摘要:
An apparatus for measuring attributes such as color, thickness and/or retro reflectivity of a road marking disposed on a road surface. The apparatus includes a vehicle that travels over the road surface. The vehicle transports a measurement system and a computer. The measurement system includes at least one subsystem, which may include a color measurement subsystem, a thickness measurement subsystem and/or a retro-reflectivity measurement subsystem. The computer receives the measurement information from the measurement system.
摘要:
A LIME AND SILICA-RICH HIGH-ALUMINA CEMENT AND THE PROCESS FOR MANUFACTURING IT. A LIME AND SILICA-RICH HIGH ALUMINA CEMENT WHICH CONSISTS, IN PARTS BY WEIGHT, OF ABOUT: 8 TO 10% SIO2 ABOUT 1 TO 2% TIO2 26 TO 29% AL2O3 14 TO 16% FE2O3 O% OR TRACES FEO 45 TO 48% CAO THE MODULI: SIO2/AL2O+FE2O3 BEING IN THE RANGE OF ABOUT 0.18 TO 0.25 AL2O3/CAO FROM 0.55 TO 0.65 AL2O3/SIO2 BETWEEN ABOUT 2.6 AND 3.6 AND THE MINERALOGICAL COMPOSITION CONTAINING CA, C2S, C12A7 AND FERRITES. THE CEMENT HAS A BROADER RANGER OF USE AND ITS PREPARATION IS CHEAPER.
摘要:
Apparatus in which cement clinker is crushed at a temperature of 1,000* to 1,450* C., is then brought, while passing through a reducing atmosphere for between 1.5 and 6 minutes, down to a temperature in the range 700* to 1,100* C., is then subjected to rapid cooling by the application of atomized water to reduce the temperature to approximately 300* C. while excluding oxygen, and is finally collected in free air, thorough contact with the reducing atmosphere and the subsequent rapid cooling being ensured by carrying out these stages while the clinker is vibrated down an incline from the exit of the crusher to its point of collection in the atmosphere.