Abstract:
A method for obtaining microcement and the microcement obtained thereof, by means of using a closed-circuit mill with high-efficiency separators (second generation with cyclones for dust collection), thus allowing to produce at a very low cost, showing excellent properties and quality of the microcement obtained thereof.
Abstract:
This invention relates to a device with function for measuring volumetric changes in a substance. In particular, the device with function for measuring volumetric changes in a substance comprises a sensor that detects the amount of light intensity produced by a light source aligned with said sensor when passing through a column of two liquids which are immiscible among each other contained in a transparent tube, wherein the sensor and the aligned light source are mounted on an arm that travels on a vertically arranged rail, wherein the arm is attached to a strap which acts by means of a first and a second pulley causing the movement of said arm, wherein the movement of said pulleys comes from a motor and a gearbox and the entire mobility system is mounted on a frame. The device further comprises data acquisition means which record the change of light intensity and control the arm movement.
Abstract:
An improved supplementary cementitious material (SCS) comprising previously supercalcined clays (calcined at temperatures between 90° and 1500° C.) and a chemical activator selected from a silicate, a strong base or a mixture of activators comprising a mixture of silicate-strong base.
Abstract:
The present invention is directed to a pozzolanic mixture used as a supplementary cementitious material (SCM) comprising an activated clay, a limestone and a setting regulator. Moreover, it is also directed to a cementitious composition comprising said pozzolanic mixture, a clinker and a setting regulator. Finally, the invention is also directed to a concrete comprising the cementitious composition described above, fine aggregate, coarse aggregate and water, optionally the concrete may have other additives.
Abstract:
The present disclosure refers to a process of obtaining a biocrude from biomass, where said process comprises the solvothermal liquefaction of the biomass in the presence of a mixture of solvents, until obtaining a gaseous phase, a solid phase, an aqueous liquid phase and an organic liquid phase comprising the biocrude. Wherein the mixture of solvents comprises between 0.5% w/w to 99.5% w/w of water and at least one solvent; and wherein the solvent is selected from alcohols, ketones, aldehydes, or precursors thereof under the processing conditions. The process described herein allows the use of biomass for the production of renewable fuels, as well as obtaining a biocrude with a yield greater than or equal to 30%, with a calorific value between 20 and 35 MJ/Kg and with a sulfur percentage lower than 1% w/w.
Abstract:
The present invention corresponds to a cement formulation based on sulfoaluminate comprising a specific Ye'elimite crystal proportion having enhanced mechanical resistance, setting and low CO2 emission features. A concrete obtained when mixing said formulation with water and gypsum is further described, having a superior performance at initial ages compared to concrete obtained from Portland cement.
Abstract:
The present invention corresponds to a cement formulation based on sulfoaluminate comprising a specific Ye'elimite crystal proportion having enhanced mechanical resistance, setting and low CO2 emission features. A concrete obtained when mixing said formulation with water and gypsum is further described, having a superior performance at initial ages compared to concrete obtained from Portland cement.