61 results about "Pozzolanic activity" patented technology

The invention relates to mineral powder-doped polymer waterproof mortar and a using method thereof. The mineral powder-doped polymer waterproof mortar comprises ordinary Portland cement, S95 mineral powder, S105 mineral powder, desulfurized gypsum, river sand, emulsion powder, fibers, a water reducing agent, a deforming agent and bentonite. According to the mineral powder-doped polymer waterproof mortar, the average grain diameter of the S105 mineral powder is 12-17mu m, the specific surface area of the S105 mineral powder, which is determined by a nitrogen adsorption method, is 600-700m<2>/kg, the quality factor K of the S105 mineral powder is 1.9-2.1, the S105 mineral powder has very high gelatinization activity, the gelatinization activity of the S105 mineral powder is nearly equivalent to and even slightly exceeds that of 52.5-grade ordinary Portland cement; and the average grain diameter of the S95 mineral powder is 45-52mu m, the specific surface area of the S95 mineral powder, which is determined by a nitrogen adsorption method, is 300-350m<2>/kg, the quality factor K of the S95 mineral powder is 1.9-2.1, and the S95 mineral powder has high pozzolanic activity. The strength of the motor is not reduced and even is slightly enhanced while the seepage prevention of the product is improved. The mineral powder-doped polymer waterproof mortar has the characteristics of high anti-permeability grade, good caking property, high strength, ageing resistance, alkali resistance, convenience in construction, low cost and the like and is suitable for waterproof treatment of general civil buildings, water resistance, corrosion prevention, seepage prevention and moisture prevention of general air-raid shelters and remediation and strengthening of general engineering.

The invention discloses modified recycled concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 100 parts of cement, 235 to 260 partsof recycled aggregate, 145 to 165 parts of sand, 35 to 45 parts of water, 3 to 10 parts of silica fume, 0.5 to 2.5 parts of nano-silica, 0.5 to 2.5 parts of a water reducing agent, and 0.5 to 1.5 parts of cellulose ether. According to the modified recycled concrete and the preparation method thereof, the recycled aggregate is mechanically activated to remove particles and corners which can easilypeel off, so that the performance of the recycled aggregate is improved. Both nano-silica and silica fume have pozzolanic activity, can react with calcium hydroxide produced by cement hydration to form C-S-H gel, and can effectively improve the performance of the recycled aggregate concrete. The raw material components have a synergistic effect, and the obtained concrete has excellent mechanicalproperties and durability.

The invention provides a reaction film formation inorganic dry powder coating material and a production method thereof and belongs to the technical field of coating materials. The coating material is composed of, by mass, 20-50% of inorganic film formation material, 20-70% of filler and the balance auxiliary material. The inorganic film formation material is composed of a nano-scale or submicron-scale siliceous material and/or silica-aluminum material with high pozzolanic activity and a calcareous material, wherein the calcareous material has glueyness after being placed in water, the siliceous material and/or silica-aluminum material accounts for 20-50% of the total mass of the inorganic film formation material, and the balance is the calcareous material. Compared with existing coating materials, the coating material has the advantages that painting can be conducted on site after water is added to the coating material and stirred, construction is convenient, water resistance and alkali resistance are excellent, drying time is short, bonding strength is high, and scrub resistance is high.

The invention discloses a waste brick and tile recovery device for constructional engineering. The waste brick and tile recovery device for constructional engineering comprises a recovery tank body, afirst filtering screen, a second filtering screen and a collecting box body. A feeding inlet is installed above the recovery tank body. The first filtering screen is installed at the bottom of a smashing cavity, and the outer sides of breaking plates and hydraulic cylinders are connected with each other through piston rods. Object placement plates are welded to the left side and the right side ofthe recovery tank body, the second filtering screen is installed below the first filtering screen, the outer sides of grinding rollers are connected with motors in a rotating mode through rotating shafts, and a sliding groove is formed in the front surface of the recovery tank body. Clamping combination plates are fixedly arranged at the front end and the rear end of each grinding roller, and thecollecting box body is installed below the second filtering screen. By the adoption of the waste brick and tile recovery device for constructional engineering, waste bricks and tiles can be smashed and ground before the waste bricks and tiles are recovered, after the waste bricks and tiles are ground to form powder, the waste bricks and tiles have the pozzolanic activity and can serve as the concrete admixture to be used, and therefore resource recycling is achieved.

The invention discloses hydrophobic foam concrete and a preparation method thereof. The concrete comprises cement, phosphorus slag powder, fly ash, phosphogypsum, modified gel and other components, wherein both the phosphorus slag powder and the fly ash contain a large amount of vitreous bodies and have high pozzolanic activity; the phosphorus slag powder, the fly ash and the phosphogypsum have density smaller than the density of the cement and can replace part of the cement to reduce mass of the concrete and facilitate lightening of the concrete; the particle distribution of each component isdifferent, and the particles with different gradations are beneficial to the increase of the compactness of the concrete. The process is reasonable in design and simple to operate. In the technical scheme, the silicon dioxide aerogel is optimized and modified to prepare the modified hydrophobic silica gel, then a fiber compound is added, the strength of the foam concrete is improved, finally, a surfactant is prepared to conduct surface treatment on the concrete, and the prepared foam concrete is excellent in hydrophobic property, excellent in mechanical property and high in practicability.

The invention discloses a concrete admixture based on iron tailing powder and a preparation method of the concrete admixture. The concrete admixture is prepared from the following components specifically in percentage by weight: 59.7% of the iron tailing powder and natural gypsum, 25% of level-I coal powder ashes, 15% of S105 mineral powder, and 0.3% of a liquid functional conditioning agent. Irontailings used are prepared from the following components in percentage by weight: 62.13% of SiO2, 5.12% of CaO, 4.36% of MgO, 10.23% of Fe2O3 and 9.65% of Al2O3. According to the concrete admixture based on the iron tailing powder and the preparation method of the concrete admixture, through certain activating treatment, the pozzolanic activity of the iron tailings is shown, the iron tailings andother mineral admixtures are compounded in proportion to produce a synergistic effect, the different mineral admixtures are made to exert respective advantages, the effect of complementary to each other is reached, the iron tailings can be developed to be the concrete admixture, then the additional value of the iron tailings is improved, and the cost of cement concrete is further lowered.

The invention discloses a concrete material by using tail sand to displace yellow sand and a preparation method thereof. The concrete material comprises the following raw materials: cement, industrial waste residue, water reducing agent, tail sand, water and reinforced fiber, wherein the industrial waste residue is one or two or more of silica fume, fly ash, fine slag powder, fine steel slag powder and other industrial byproducts with pozzolanic activity; the tail sand is the byproducts of the mining industry, with the maximum grain size of 3mm, namely the solid wastes of all types of mining enterprises. The preparation method disclosed by the invention is the improvement on preparation of common concrete; the prepared concrete product has good performances; and tail sand is fully utilized and the material and the method disclosed by the invention is environment-friendly.

The invention relates to a method for stockpiling tailings from beneficiated bauxite, belonging to the method for stockpiling tailings from washed bauxite or beneficiated bauxite or the method for stockpiling tailings from beneficiated metal or beneficiated nonmetal. The method for stockpiling tailings from the beneficiated bauxite is characterized in that after the pulp of the tailings from the beneficiated bauxite is concentrated until the weight concentration of the solid reach 40-55 percent in the process of stockpiling the tailings from the beneficiated bauxite, base stock and gelatinous activator which have the pozzolanic activity or the latent hydraulicity are added to the pulp of the tailings from the beneficiated bauxite, then mixed with the same, and strongly stirred to the same to prepare the uniform paste with the weight concentration of the solid being 40-60 percent and the collapse degree being 20-28 cm, and the paste is transported to a stockpiling yard to be coagulated into a harden stockpiled body. The practice proves that the method for stockpiling tailings from the beneficiated bauxite is easy to realize the large-scale industrial production and has low operating cost.

The invention relates to a method for preparing a steam-curing building block through wet-milling waste glass. The method comprises the following steps of feeding 50 to 70 parts by weight of waste glass and 10 to 20 parts by weight of acetylene sludge into a crushing machine for crushing, then feeding into a wet type ball mill, adding water according to the proportion of 0.4 to 0.6 of weight ratio of water to material, and then adding 0.5 part of grinding aid for ball milling to obtain a slurry; and placing the slurry in a stirring machine, adding 4 to 6 parts of cement, 20 to 30 parts of coal ash, 2 to 5 parts of excitant and 1 to 2 parts of admixture for stirring and forming, carrying out four stages of standing, warming, keeping constant temperature and cooling, and obtaining the building block through steam curing. According to the method for preparing the steam-curing building block through the wet-milling waste glass provided by the invention, waste glass powder is refined through a wet-milling process, and the pozzolanic activity of the waste glass powder is fully played, so that the building block can be prepared by adopting a non-steam process, the energy consumption is low, the production cost is low, and the maintenance period can be shortened; the coal ash and the acetylene sludge are added, so that the prepared building block has excellent performances; and a large number of wastes are utilized, so that the solid waste utilization rate is improved.

The invention belongs to the technical field of building materials, and particularly relates to a micro-expansion phosphorus slag powder grouting material and a using method thereof. The material is prepared from Portland cement, river sand, phosphorous slag powder, slag powder, a phosphorus slag powder activator, calcined magnesium oxide, lipid membrane calcium oxide, polypropylene fibers, wood fibers, modified attapulgite, an antifoaming agent and a water reducing agent. The average particle size of the phosphorous slag powder is in a range of 30-40 mu m, the specific surface area measured through nitrogen absorption is in a range of 350-400 m<2>/kg, the quality factor K is in a range of 1.3-1.4, and the phosphorus slag powder has certain potential pozzolanic activity. The micro-expansion phosphorus slag powder grouting material can be used after directly and evenly mixed with water in a construction site and has the characteristics of good liquidity, good water retention property, certain plastic expansion, high strength, micro-expansion, good crack resistance and the like. The product is applicable to secondary grouting of equipment installation foundations, reinforcement grouting of connecting positions of prefabricated reinforced concrete boards and beam columns and the like.

The invention discloses high-volume mixed glass powder C180UHPC and a preparation method thereof. UHPC of the high-volume mixed glass powder C180UHPC comprises components in the proportion as follows:cement with concentration of 770.2 kg/m<3>, silica fume with concentration of 154.0 kg/m<3>, fly ash with concentration of 38.5 kg/m<3>, fine glass powder with concentration of 154.0 kg/m<3>, a superplasticizer with concentration of 46.2 kg/m<3> and steel fiber with concentration of 156 kg/m<3>. The invention further discloses a preparation method of the UHPC. A curing way comprises steps as follows: a concrete test block is wrapped with wet cotton cloth tightly, and water is sprayed intermittently at high frequency for curing or the concrete test block is put in water for curing. Not only isthe curing mechanism simplified, but also moisture in concrete is effectively prevented from being evaporated. The high-volume mixed glass powder C180UHPC and the preparation method thereof have following technical advantages: waste glass is recycled, natural material consumption is reduced, and energy-saving and environment-friendly effects are achieved; the glass powder has pozzolanic activity,and concrete strength and durability are improved; the glass powder with different particle sizes are mixed, and accumulation gaps among quartz sand are filled, so that the structure is tighter; a water-binder ratio and the superplasticizer are preferably selected, and the UHPC has the self-compaction advantage.

The invention relates to a method and an apparatus for modifying the pozzolanic activity of a mineral material. The apparatus comprises devices of a gas bottle, a feeding cabin, a fluidized bed container, a pressure reduction cylinder, a finished product collection container, a modifier container, an atomizer, a nozzle, a dust collector and the like, and gas tubes, a water tube, a material tube and a heating tube for connecting the devices. The method concretely comprises the following steps: fully mixing an atomization modifier with the mineral material in the fluidized bed container, and carrying out thermal treatment by the heating tube to make modifier particles and mineral particles be tightly combined, wherein the modifier can most effectively excite the hydration activity of the mineral material. The method has the characteristics of high efficiency of the mixing of the modifier with the mineral material, and good excitation effect on the hydration activity of the mineral material.

The invention relates to a fly ash ceramic soilless culture substrate and a manufacturing process thereof, belonging to the technical field of material engineering. A geopolymer foamed adobe with certain strength is prepared by using the pozzolanic activity of fly ash and is then sintered so as to obtain a ceramic. The fly ash ceramic soilless culture substrate comprises the following raw materials: 80 to 98.5% of fly ash and 1.5 to 20% of a mixed exciting agent X. Sintering temperature is 1000 to 1200 DEG C. The mixed exciting agent X is an alkaline mixed liquor containing a plurality of ions and active materials. The novel fly ash ceramic soilless culture substrate has the characteristics of low cost, good water retention performance and air permeability, long service life and easy recovery processing and is very beneficial for protection of the environment since industrial waste like waste fly ash can be utilized.

The invention discloses a water-resistant ardealite mould box and a preparation method thereof. The water-resistant ardealite mould box is prepared from, by weight, 550-650 parts of ardealite, 50-100 parts of cement, 50-100 parts of sulphate aluminum cement, 1-8 parts of a water reducer, 6-15 parts of an activator, 3-10 parts of glass fibers and 300-400 parts of pozzolanic activity mineral materials. The preparation method includes the steps that the components are poured into a stirring vessel according to the weight proportion and mixed and stirred for 3-5 min, then a proper amount of water is prepared, the mixed components are poured into the water and stirred for 30 s, the mixture is poured into a mould and formed, demoulding is carried out after 10 min of standing, an obtained mould box is covered with a plastic film, and the water-resistant ardealite mould box can be obtained after 3 days of wet curing. According to the water-resistant ardealite mould box and the preparation method thereof, the problems that plaster mould boxes do not have water resistance, and the strength of plaster mould boxes and surrounding concrete cement is low are solved, cost is lowered, and the development of the plaster mould box industry is promoted.