3results about How to "Improve early" patented technology

The application provides a kind of green low carbon cementitious material and its preparation method, belong to building material technical field.The application first carries out pretreatment to converter slag to obtain superfine converter slag, so as to improve the activity and fluidity of converter slag;By compounding sodium hydroxide, liquid water glass and sodium chloride as alkali activator as alkali activator, so as to improve the early and late compressive strength of concrete obtained by replacing cement with green low carbon cementitious material;The application can further improve the green low carbon cementitious material by adding emulsified asphalt and PE fiber in the raw material, so as to realize the increase of the amount of green low carbon cementitious material that can replace cement.

The invention discloses an active cementing material based on aluminum-carbon synergistic reaction and a preparation method thereof. The preparation method comprises the following steps: mixing a calcium-based solid waste material with a regulating agent solution to form mixed slurry; introducing industrial tail gas containing CO2 into the mixed slurry, reacting for 30-180 minutes at the temperature of 25-100 DEG C, carrying out carbonization treatment, and then carrying out solid-liquid separation and drying dehydration to obtain an active carbonate admixture; mixing the active carbonate admixture with a volcanic ash material and ordinary Portland cement, and adding water to prepare an active cementing material with aluminum-carbon synergistic reaction; aiming at the problems in the prior art, an aluminum-carbon synergistic reaction is introduced to realize synchronous proceeding of carbonate mineralization and aluminate activation, a compact and continuous skeleton structure is constructed, the early and later compressive strength of the cementing material is remarkably improved, and meanwhile, resource utilization of industrial solid wastes such as the steel slag, the red mud and the waste concrete can also be realized.

This disclosure relates to a method and system for preparing an alkaline slag-calcium sulfate composite activated product, belonging to the field of carbon fixation material preparation technology. The method includes: firstly, differentially mechanically activating alkaline slag and calcium sulfate to obtain pretreated powder; then, performing microwave-chemical coupling activation treatment; and finally, intermittent ultrasonic dynamic aging to obtain a precursor for carbon fixation filling materials. The system includes a dual-cavity graded ball mill module, a microwave-chemical coupling activation module, and an ultrasonic dynamic aging module connected in sequence. This application significantly improves the system's reactivity and structural uniformity through multi-stage synergistic activation, effectively solving technical defects such as salting out and cracking, and can greatly improve the carbon fixation rate and long-term mechanical strength, realizing the high-value utilization of bulk industrial solid waste and efficient carbon dioxide sequestration. This application has a simple process, low energy consumption, and strong controllability, and is suitable for large-scale industrial applications of carbon fixation filling in mines.