7results about How to "Improve early" patented technology

The invention provides a composite mineral admixture based on iron ore tailing mud and a preparation method thereof, and the composite mineral admixture comprises the following raw materials by weight: 30-40 parts of activated iron ore tailing mud, 5-10 parts of layered ultrafine powder, 5-10 parts of a methacrylic acid-cellulose copolymer, 5-7 parts of limestone powder, 1-3 parts of a composite grinding aid, and 1-3 parts of a composite activator. According to the composite mineral admixture disclosed by the invention, the mixing amount of the composite mineral admixture in cement can be increased to the maximum extent, the use amount of cement clinker is reduced, the production cost of the cement is reduced, the composite cement has more excellent mechanical properties, volume stability and durability, and the composite mineral admixture plays a role similar to a crystal nucleus effect in a cement hydration process; and meanwhile, the hydration products tend to be uniformly distributed in the whole interface transition area, the hydration products with better stability are generated, and the anti-permeability performance is improved.

The invention discloses a low-carbon masonry cementing material as well as a preparation method and application thereof. The low-carbon masonry cementing material is prepared from the following raw materials in parts by weight: 95-100 parts of ceramsite waste residue powder, 1-10 parts of magnesium aluminum silicate slag and 0-4 parts of clinker, the low-carbon masonry cementing material contains a large amount of amorphous active silicon, and under the direct excitation hydration action of the magnesium aluminum silicate slag component, the hydration rate of the low-carbon masonry cementing material is promoted, so that the low-carbon masonry cementing material has the characteristics of improved early and long-term strength, strong durability, high water retention rate and small hydration heat; besides, by adding the clinker, mineral components such as CaO, SiO2 and Al2O3 can be released and promoted to be subjected to a hydration reaction, C-S-H series hydrates and ettringite are generated, and the artificial stone is coagulated and hardened into the hard artificial stone at the normal temperature like cement.

The invention relates to the field of foam concrete, and particularly discloses an all-solid waste alkali-activated cementing material for foam concrete. The all-solid waste alkali-activated cementing material for the foam concrete comprises the following components in parts by weight: 10-20 parts of lithium slag, 25-35 parts of fly ash, 35-45 parts of mineral slag, 10-20 parts of steel slag, 3-8 parts of phosphogypsum and 5-7 parts of an exciting agent. The exciting agent is a mixture of solid sodium metaaluminate, sodium silicate and carbide slag in a mass ratio of (3.5-4.5): 1: 1, and the modulus of sodium silicate is 1.5; the ardealite is industrial byproduct gypsum. The all-solid waste alkali-activated cementing material for the foam concrete has the advantages that the problems of high carbon emission and high energy consumption of a cement-based foam concrete cementing material are solved, and meanwhile, the mechanical property and durability of the foam concrete are improved.

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.

The present application relates to the field of grouting materials, and specifically discloses an early-strength, high-strength and self-expanding sleeve grouting material and a preparation method thereof. The grouting material comprises the following components by weight: 250-330 parts of magnesium oxide, 87-175 parts of magnesium sulfate, 25-33 parts of metakaolin, 1.25-1.65 parts of whisker inducer, 550-650 parts of filler, and 120-150 parts of water; the whisker inducer is at least one of sodium laurate, lauric acid, and potassium laurate. The grouting material of the present application has excellent early strength performance, and the compressive strength reaches the standard of ultra-high-strength sleeve grouting material, and at the same time has suitable self-expanding performance and moderate setting time.