681 results about "Aggregate (composite)" patented technology

The invention relates to a concrete commonly used in building materials, and especially relates to a thermal-insulation loading recycled concrete. A technical problem to be solved is to provide a recycled concrete which is an integration of thermal insulation, loading, quake resisting, and energy saving and emission reduction. A technical scheme adopted is characterized in that a weight ratio (kg/m<3>) of a composite lightweight aggregate admixture: cement: recycled fine aggregate: sand: recycled coarse aggregate: cobblestone: ceramsite: coal ash: water: additives is (5-250):(200-800):(20-500):(5-800):(30-600):(5-1400):(50-800):(10-600):(50-500):(0.1-200); the composite lightweight aggregate admixture is a mixture of glazed hollow beads and an aerogel, and the weight part ratio of the glazed hollow beads to the aerogel is 1:(0.7-1.5); and the additives comprise the following components, by weight, 10-150 parts of silica fume, 4-40 parts of an air entraining agent, 5-30 parts of a foaming agent, 3-30 parts of a water reducing agent, 1-30 parts of a polypropylene fiber, and 10-150 parts of waste slag. The technical scheme is used for making the recycled concrete.

The invention discloses high strength concrete and its preparation method, and relates to the technical field of building materials. 1 m<3> of the high strength concrete comprises the following ingredients: 200-300 kg of ordinary Portland cement, 40-50 kg of mineral powder, 15-30 kg of rubber particles, 500-800 kg of fine aggregate, 600-900 kg of coarse aggregate, 20-60 kg of a concrete composite additive, 50-100 kg of polypropylene fiber, 100-200 kg of water, 45-90 kg of phosphorous slag powder, 2-3 kg of a corrosion inhibitor, 5-10 kg of a water reducing agent, and 10-20 kg of a reinforcing agent. According to the prepared concrete product, compressive strength is remarkably raised, cracks are minimized, and life of concrete structures is prolonged. In addition, the preparation method is simple, and production efficiency is high.

The invention discloses a high-strength composite inorganic artificial stone and a preparing method thereof; the inorganic artificial stone comprises the following components by the weight percentage: 30-65% of aggregates, 25-60% of cement, 1-10% of a composite modifying agent, 1-5% of a water reducing agent, 0-1.5% of a retarder, and 8-20% of water, wherein the particle sizes of the aggregates are graded according to the weight of the aggregates. The preparing method of the inorganic artificial stone comprises the steps: successively adding the aggregates with predetermined weight particle size graduation, the cement, the composite modifying agent and the water reducing agent into a stirrer successively, uniformly stirring, adding an appropriate weight of water, then uniformly stirring, distributing the material and pressing under a vacuum state, carrying out wet culture and curing, cutting, and polishing to obtain the product. The inorganic artificial stone has the advantages of high bending strength, environmental-protection production process, lower cost, high yield rate of the product, outstanding performance and the like.

The invention discloses a heat-insulating integrated composite brick with an alkaline structure and a preparation method thereof, comprising a heavy-weight work layer and a light-weight heat-insulating layer, wherein the heavy-weight work layer takes compacted magnesium and compacted alkaline materials as the raw materials; the light-weight heat-insulating layer takes an alumina hollow ball or analuminum-magnesium hollow ball or a corundum hollow ball or the mixture of the three balls as the light-weight aggregate; the composite brick is composited by the heavy-weight work layer and the light-weight heat-insulating layer by vibration and pressurizing or mechanical-pressing moulding; and the proportion of the length dimension of the heavy-weight work layer and the light-weight heat-insulating layer is 1-5:2-1. The heat-insulating integrated composite brick overcomes the defect of big heat conductivity of the alkaline brick for a rotary kiln. The invention provides the heat-insulating integrated composite brick with good wear resistance, high refractoriness, good structural strength and good heat-preserving and heat-insulating performance.

The invention discloses a microorganism soil-reinforcement cement fly-ash gravel (CFG) pile composite foundation and a construction method. The construction method comprises the steps that a, a pile pipe is pressed into a foundation; b, microorganism bacterium liquid is injected into the pile pipe at the same time, and the microorganism bacterium liquid is made to diffuse towards the foundation around the pile pipe; c, the microorganism bacterium liquid is pumped out, and a cementing solution is injected into the pile pipe and made to diffuse to the foundation around the pile pipe and reacts with the microorganism bacterium liquid to generate calcium carbonate crystals, and incompact sandy soil or floury soil is cemented; d, the step b and the step c are executed repeatedly till the soil around the pile pipe meets the reinforcement requirement; e, pipe-drawing pile formation is conducted while cement-ash stabilized aggregates are poured; and f, a bed course is laid, so that the CFG pile composite foundation is formed. According to the microorganism soil-reinforcement CFG pile, the soil around the pile pipe is reinforced through calcium carbonate generated through reaction between the microorganism bacterium liquid and the cementing solution, so that the strength of the soil around the pile pipe is improved, and the quality problems of necking, pile breakage, soil carrying and the like in the pile forming process are solved; in addition, a reinforced soil body can be combined with a pile for bearing, and the bearing capacity of the single pile is effectively improved.

The invention relates to phase change thermoregulation cement pitch composition concrete and a preparation method thereof. Cement mucilage mixed with phase change materials is filled into pitch concrete with big pores in self-leveling mode so as to guarantee that the pores are fully filled. Components of the pitch concrete with the big pores include: 88-90% of aggregate, 5-7% of mineral powder and 4-5% of modified pitch, wherein porosity of the pitch concrete ranges from 20% to 30%. Components of the cement mucilage mixed with the phase change materials include: 40-45% of cement, 15-20% of fine sand, 5-7% of coal ash, 25-30% of water, 0.6-1.5% of swelling agent, 5-10% of composite phase change materials and 0.3-0.5% of water reducer. The phase change thermoregulation cement pitch composition concrete and the preparation method of the phase change thermoregulation cement pitch composition concrete have the advantages of being simple in technology, low in cost, easy to implement and capable of enabling road surfaces to have strong capacity of resisting tracks, simultaneously having a function of lowering temperature of the road surfaces, and avoiding thermal damage on the phase change materials during a high temperature mixing and paving process in the traditional hot-mixed pitch concrete.

The invention discloses a three-phase composite conductive anti-freezing asphalt mixture and a preparation method thereof. The three-phase composite conductive anti-freezing asphalt mixture comprises coarse aggregates, fine aggregates, mineral powder and asphalt, and is added with a conductive material which consists of 15-20 percent of graphite, 0.2-0.5 percent of carbon fibers and 15-55 percent of steel slag by weight percent. The preparation method comprises the steps of: screening, crushing and heating the aggregates to 180 DEG C plus or minus 5 DEG C, adding the steel slag and agitating for 85-95s; adding the carbon fibers and agitating for 80-90s; adding matrix asphalt and agitating for 85-95s at 165 DEG C plus or minus 5 DEG C; then adding the filler mineral powder and the graphite and agitating for 85-95s; and finally conducting heat preservation for 1-2h in a drying oven at the temperature being 140-145 DEG C to obtain the three-phase composite conductive anti-freezing asphalt mixture. Snow melting through electric conduction is realized. At the same time, the high-temperature mechanical property and the anti-fatigue durability of the pavement are improved.

The invention provides a phosphogypsum cement graded broken stone stable layer, which comprises aggregates and a phosphogypsum composite stable material. The aggregates comprise coarse aggregate and fine aggregate. The coarse aggregate comprises broken stones with three particle sizes: 15-25 parts of broken stones with particle size of 4.75-9.5 mm, 15-25 parts of broken stones with particle size of 9.5-19 mm and broken stones with particle size of 19-26.5 mm. the fine aggregate comprises 30-40 parts of stone chips with particle size of 0-4.75 mm. Addition amount of the phosphogypsum compositestable material is 15-20% of the amount of the aggregates. Water content of the graded broken stone stable layer is 7.0-8.1%. The invention has the following beneficial effects: a new approach of phosphogypsum utilization is provided, and the phosphogypsum accumulation problem can be effectively solved. The 7-day unconfined compressive strength of the graded broken stone stable layer is averagely8.1 Mpa. The 7-day unconfined compressive strength is raised by 7-9 Mpa, which is far higher than 5 Mpa of a cement-stabilized macadam stable layer. As slag of S95 and above is adopted for the gradedbroken stone stable layer, performance of the graded broken stone stable layer can be effectively raised and cost can be reduced, and environment pollution caused by slag will be avoided. The manufacturing method of the graded broken stone stable layer is simple, and the manufacturing can be realized without large quantities of professional equipment.

The invention provides an on-line production method and an on-line production device of composite foamed slurry. The method comprises the steps of feeding, mixing, foaming, stirring and pumping. The device comprises a cement feeder, a polyphenyl granule feeder, an aggregate feeder, a water pump, a foaming machine, a stirring conveyer, a slurry storage tank, a concentrated slurry pump and an electric control device. According to the method and the device, effective recombination of organic light aggregate, inorganic heavy aggregate and foamed slurry is realized; the insulated, soundproof, anti-freezing, durable, light and high-strength composite foamed slurry with more optimized performance can be prepared and conveyed; the mixing proportion metering is more accurate compared with manual feeding, the stirring time is shorter compared with an intermittent stirring mode, the foam loss is lower, and solid-liquid phase separation of the slurry is avoided; and meanwhile, by continuous machining and conveying, the production and construction efficiency is improved.

The invention relates to an ultra-viscous seal coat on the bituminous pavement and a construction method thereof. The ultra-viscous seal coat comprises a high performance modified emulsified bitumen bonding layer and an ultra-viscous cold-mixed material wearing layer which is obtained by cold-mixing aggregates, cement, water, composite modified emulsified bitumen, a fiber and a liquid additive. According to the construction method of the seal coat, the ultra-viscous cold-mixed material wearing layer mixing and lying and the high performance modified emulsified bitumen sprinkling are synchronously carried out. The seal coat has the characteristics of ultra bonding, high water resistance, high sliding resistance, low noise, crack resistance, low carbon, energy saving and environmental protection.

The invention provides steel slag vegetation concrete, which is prepared from the following components in parts by weight: 75 to 83 parts of steel slag aggregate, 15 to 24.5 parts of composite steel slag powder and 0.5 to 2 parts of strengthening agent. A preparation method comprises the steps of uniformly stirring and mixing the steel slag aggregate and the composite steel slag powder as well as the strengthening agent proportionally, and adding water to produce the steel slag vegetation concrete. The steel slag vegetation concrete prepared by utilizing steel slag is high in strength, large in porosity and an acid-base environment can meet the requirement of growth of plants.

The invention relates to the technical field of building materials, in particular to high-strength recycled concrete and a preparation method and application thereof, and the high-strength recycled concrete is prepared from the following raw materials in parts by weight: 290 to 443 parts of cement; 20 to 70 parts of fly ash; 20 to 70 parts of slag; 20 to 70 parts of silica fume; 20 to 70 parts of metakaolin; 650 to 750 parts of fine aggregate; 550 to 600 parts of natural coarse aggregate; 450 to 510 parts of recycled coarse aggregate; 4.0 to 7.0 parts of a water reducing agent; and 140 to 160 parts of water. The high-strength recycled concrete is designed and prepared on the basis of the service environment and load-bearing requirements of a recycled concrete structure, and mineral admixtures comprise coal ash, slag, silica fume and metakaolin. According to the preparation method, a pre-wetting-double slurry wrapping method is adopted, the recycled aggregate is subjected to pre-wetting, slurry wrapping and repeated stirring treatment, the internal microstructure of the concrete is enhanced, and the mechanical property of the recycled concrete and the durability of the recycled concrete in a composite salt erosion environment are improved.

The invention discloses a cement-based composite and a mending method of concrete cracks. The cement-based composite is prepared from the following components in parts: 15 to 69 parts of cement, 17 to 30 parts of water, 10 to 45 parts of refined aggregate, 34 to 104 parts of fly ash, 0 to 4.5 parts of silica ash, 0 to 8 parts of granulated blast-furnace slag, and organic fiber of which the volume is 1.5% to 2.5% of the total volume of the composite. Therefore, the cement-based composite not only has the function of the conventional cracked cement composite, but also can prevent steel bars inside the concrete from rusting. The mending method of the concrete cracks not only pays attention to reduce stress generated on a contact part between a mending layer and concrete cracks, but also pays attention to enhance the bonding strength of the mending layer and peripheral rims of the concrete cracks; besides, the water in the mending layer is prevented from infiltrating into the cracks to cause the rusting of the steel bars inside the cracks through the injecting epoxy material in the cracks, and a waterproof layer is adopted to prevent the water and the oxygen from entering into the cracks through the mending layer.

The invention discloses a corundum-mullite composite brick for a COREX furnace and a preparation method thereof. The raw materials of the corundum-mullite composite brick are composed of a corundum-mullite homogenized material, white corundum, andalusite, a-Al2O3 powder and binding clay, as well as paper pulp liquid waste. The preparation method comprises the steps of firstly, preparing raw materials with various particle sizes according to the ratio; then, using raw materials with particle sizes of 1-3mm and particle sizes smaller than 1mm as aggregate to perform dry mixing, adding a paper pulp liquid waste mixture, finally adding the residual raw materials, and milling to obtain a pug; sequentially performing material trapping, press forming and drying on the obtained pug, and finally roasting to obtain a product. The corundum-mullite composite brick produced in the invention has very low porosity, high compression strength and excellent thermal shock resistance and corrosion resistance, can completely satisfy the harsh application environment of the COREX furnace, and can prolong the service life.