12 results about "Calcium aluminoferrite" patented technology

The invention relates to the technical field of cement material preparation, and particularly discloses a calcium aluminoferrite-calcium sulphosilicate cement-based expanding agent as well as a preparation method and application thereof. The expanding agent comprises expansion source powder, gypsum powder and a regulating agent. The expansion source powder is prepared from 45 to 55 weight percent of calcium aluminoferrite, 30 to 40 weight percent of calcium sulphosilicate, 5 to 10 weight percent of calcium sulphoaluminate, 5 to 10 weight percent of dicalcium silicate and 2 to 4 weight percent of calcium sulfate; the balance is inevitable impurity mineral phases; the calcium aluminoferrite comprises dicalcium ferrite, hexacalcium dialuminoferrite, tetracalcium aluminoferrite and hexacalcium dialuminoferrite. The gypsum powder accounts for 12-18% of the mass of the expansion source powder; the regulating agent is triethanolamine or propanolamine, and the mass of the regulating agent is 0.1-0.5% of the total mass of the expansion source powder and the gypsum powder. The expanding agent provided by the invention has no interference on the flowability of concrete, can provide continuous and coherent expansion for the whole hydration hardening stage of a cement-based cementing material, and has long-term stable expansion performance.

The invention discloses a seawater mixing self-adaptive novel cementing material as well as a preparation method and application thereof. The cementing material comprises the following components in parts by weight: 30-70 parts of Portland cement, 20-50 parts of an auxiliary cementing material, 5-15 parts of high belite calcium sulphoaluminate cement clinker and / or high belite calcium aluminoferrite cement clinker, 6-14 parts of nano particle sol, 1-3 parts of a water reducing agent, 3-7 parts of a nano particle stabilizer and 28-50 parts of mixing water. The nano particle sol comprises nano silica sol and nano aluminum sol at the same time, and the silica sol and the aluminum sol are connected through-COO <-> formed by dehydration condensation of Si-OH on the surface of the silica sol and-COOH on the surface of the aluminum sol. The cementing material disclosed by the invention has the characteristics of high early strength, steadily improved later strength, strong chloride ion curing capacity and strong chloride ion erosion resistance, and shows excellent durability and seawater erosion resistance.

This invention relates to the field of solid waste cementitious material preparation technology, specifically to a rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste and its preparation method, comprising the following steps: S1. Mixing and stirring modified red mud, carbide slag, mineral powder, and modified mineralizer evenly, and then pressing into shape; S2. Performing a first-stage calcination, calcining from room temperature to 950-1000℃, and then performing a second-stage calcination to 1220-1300℃ and holding at that temperature for 30-120 minutes, and cooling to room temperature to obtain modified mineral phase clinker; S3. Passing through a 200-mesh square hole sieve, mixing with modified multi-element solid waste mineral materials in a mixer, and stirring evenly to obtain the rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste. This invention significantly reduces the calcination temperature of clinker through the synergistic effect of various raw materials, thereby greatly reducing energy consumption and carbon emissions. The complex ionic reaction mechanism and the complementary physicochemical properties of multi-component solid waste enrich the diversity of hydration products and the density of the gel structure, thus ultimately achieving the excellent performance of "fast setting, fast hardening, and high strength" of the all-solid waste cementitious material.

The invention discloses a special cementing material for microwave heating concrete as well as a preparation method and application thereof, and relates to the technical field of building materials, the cementing material comprises fly ash, steel slag, high-iron-phase Portland cement clinker, high-belite sulfate cement clinker, gypsum, waste residue, solid waste, graphene, palmitic acid, a water reducing agent and the like. The content of tetra calcium aluminoferrite in the high-iron-phase Portland cement clinker is greater than 20%, and the content of tricalcium aluminate is less than 3%; in the high belite sulfate cement clinker, the content of dicalcium silicate is greater than 45%, the content of calcium sulphoaluminate is 30-50%, and a cementing material is prepared from specific solid wastes, has excellent compressive strength, low resistivity and relatively high microwave heating efficiency, and can be used for preparing microwave heating type concrete.

This invention relates to the field of solid waste cementitious material preparation technology, specifically to a rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste and its preparation method, comprising the following steps: S1. Mixing and stirring modified red mud, carbide slag, mineral powder, and modified mineralizer evenly, and then pressing into shape; S2. Performing a first-stage calcination, calcining from room temperature to 950-1000℃, and then performing a second-stage calcination to 1220-1300℃ and holding at that temperature for 30-120 minutes, and cooling to room temperature to obtain modified mineral phase clinker; S3. Passing through a 200-mesh square hole sieve, mixing with modified multi-element solid waste mineral materials in a mixer, and stirring evenly to obtain the rapid-setting and hardening cementitious material based on calcium aluminoferrite from all solid waste. This invention significantly reduces the calcination temperature of clinker through the synergistic effect of various raw materials, thereby greatly reducing energy consumption and carbon emissions. The complex ionic reaction mechanism and the complementary physicochemical properties of multi-component solid waste enrich the diversity of hydration products and the density of the gel structure, thus ultimately achieving the excellent performance of "fast setting, fast hardening, and high strength" of the all-solid waste cementitious material.

This invention belongs to the field of borehole sealing and filling technology, specifically relating to a coal and rock drill cuttings gelling agent, its preparation method, and its application. The coal and rock drill cuttings gelling agent provided by this invention includes a base material and additives. The base material is an inorganic cementing material, including at least one of calcium sulfoaluminate, calcium silicate, calcium aluminoferrite, and calcium aluminate. The additives include at least one of an adhesive, suspending agent, water-reducing agent, reinforcing agent, expanding agent, or speed-regulating agent. In this gelling agent, the base material can bind the drill cuttings, which play a skeletal role, improving material strength; the additives can further optimize the material's strength, setting time, and other properties.

This invention discloses a novel adaptive cementitious material for seawater conditioning, its preparation method, and its application. The cementitious material comprises the following components: 30-70 parts by weight of silicate cement, 20-50 parts by weight of auxiliary cementitious materials, 5-15 parts by weight of high-Belitte calcium sulfoaluminate cement clinker and / or high-Belitte calcium aluminoferrite cement clinker, 6-14 parts by weight of nanoparticle sol, 1-3 parts by weight of water-reducing agent, 3-7 parts by weight of nanoparticle stabilizer, and 28-50 parts by weight of mixing water. The nanoparticle sol includes both nano-silica sol and nano-alumina sol, with the silica sol connecting the two sol particles through the dehydration condensation of Si-OH on its surface and -COOH on the surface of the alumina sol to form -COO-. The cementitious material of this invention exhibits high early strength, steadily increasing later strength, strong chloride ion curing ability, and strong resistance to chloride ion erosion, demonstrating excellent durability and resistance to seawater erosion.

The invention discloses high-temperature-resistant special high-strength sulphoaluminate cement as well as a preparation process and application thereof. The mineral phase of the cement clinker comprises the following components in percentage by weight: 10.56%-15.21% of calcium sulphoaluminate (C4A3), 17.40%-26.45% of alpha-dicalcium silicate (alpha-C2S), 5.11%-9.67% of beta-C2S, 15.75%-25.66% of a Q phase, 22.61%-34.88% of calcium aluminate (CA), 4.33%-8.50% of calcium aluminoferrite (C4AF) and the balance of unavoidable impurity phases. The raw materials of the cement clinker are also doped with a modifier, and the modifier simultaneously comprises a metal oxide and a non-metal substance. The novel high-temperature-resistant sulphoaluminate cement is prepared by replacing high-quality raw materials with low-grade solid wastes, and the problems that the compressive strength increase in the later period is insufficient and the belite phase is easily converted to poor crystal form gamma-C2S are solved.

The invention provides a fractured-vuggy carbonate rock composition and application thereof. The fractured-vuggy carbonate rock composition comprises sulphoaluminate cement; the sulphoaluminate cement is prepared from anhydrous calcium sulphoaluminate, dicalcium silicate, tetra calcium aluminoferrite and gypsum. The fractured-vuggy carbonate rock composition provided by the invention can be used for preparing fractured-vuggy carbonate rocks, and the fractured-vuggy carbonate rocks prepared by adjusting the component proportion can realize setting of different mechanical parameters, so that the fractured-vuggy carbonate rocks are approximately equivalent to the mechanical properties of real stratum rocks.

The invention discloses an expanding agent for a well cementation cementing material and application, and relates to the technical field of oil and gas well cementation materials. The expanding agent disclosed by the invention is prepared by the following steps: pressing an expanding agent raw material which is prepared by grinding, proportioning and mixing into a cake, calcining at a high temperature of 1100-1280 DEG C, and grinding. The expanding agent raw material comprises the following components in parts by weight: 30-70 parts of a calcium material, 10-30 parts of a magnesium material, 12-35 parts of an iron and aluminum material and 0-10 parts of other materials; the mineral composition of the expanding agent comprises free lime, periclase, an iron phase, tetra calcium aluminoferrite and calcium sulphosilicate, and the free lime and periclase are wrapped by tetra calcium aluminoferrite. According to the invention, step-by-step expansion of different expansion components in the Portland cement is realized, and the different expansion components participate in the hydration reaction of the Portland cement, so that the effects of shrinkage compensation and expansion control are realized, and the purpose of synergism of the expansion reaction of the expanding agent and the hydration reaction of the cement is realized.

The invention relates to the technical field of preparation of cement-based materials, and particularly discloses an erosion-resistant rapid-hardening high-strength cement-based material for maritime work as well as a preparation method and application of the erosion-resistant rapid-hardening high-strength cement-based material. The cement-based material is prepared from the following components in parts by weight: 70 to 85 parts of a mud cementing material, 10 to 15 parts of nanoscale silica fume, 5 to 10 parts of fly ash, 8 to 10 parts of gypsum, 1 to 3 parts of nano cellulose and 30 to 35 parts of water. Wherein the cement binding material is prepared from the following mineral phase components in percentage by weight: 35.66 to 46.72 percent of dicalcium silicate (C2S), 25.99 to 36.86 percent of a Q phase, 13.94 to 14.88 percent of calcium sulphoaluminate (C4A3) and 7.81 to 9.56 percent of calcium aluminoferrite (C4AF). The cement-based material provided by the invention effectively solves the problems of weak erosion resistance and low early strength of a common cement-based material, so that the cement-based material can stably serve in a high-salt-alkali environment.

The invention relates to the technical field of cement manufacturing, in particular to a method for preparing cement clinker from copper slag tailings and the cement clinker, and the method comprises the following steps: step 1, proportioning: mixing copper smelting slag recleaning tailings, limestone and sandstone according to a certain proportion; step 2, raw material preparation: grinding the raw materials mixed in the step 1 to specified fineness to prepare a raw material; step 3, homogenizing: fully homogenizing the raw material; step 4, calcining: calcining the raw material obtained in the step 3 at the sintering temperature of 1300-1350 DEG C, and keeping the constant temperature for 30-60 minutes; and 5, rapidly cooling the calcined clinker, and discharging to obtain the target high-iron-phase cement clinker. Through process improvement, the cement clinker is prepared from copper smelting slag recleaning tailings, high-added-value resource utilization of a large amount of industrial solid waste is achieved, and the obtained cement clinker takes high-strength tricalcium silicate and high-corrosion-resistance tetra calcium aluminoferrite as main minerals and has the characteristics of high strength, good corrosion resistance, low hydration heat and the like.