115results about How to "Improve anti-crack and anti-seepage performance" patented technology

The invention relates to a method for preparing insulated energy-saving mortar containing phase-change materials, comprising the following steps that: (1) at a temperature of between 30 and 130 DEG C and the vacuum degree is between 0.03 and 0.09, 80 to 500 kg of ceramsite and 0.8 to 2.5 kg of polypropylene hollow fibers are immersed in a phase-change material solution and treated for 5 to 120 minutes, so that the phase-change material solution permeates into holes of the ceramsite and cavities of the polypropylene hollow fibers; (2)the obtained ceramsite and polypropylene hollow fibers, together with 100 to 300 kg of cement and 50 to 200 kg of vitrified micro bubbles, are mixed for 3 to 5 minutes in the condition that the cement water factor is controlled between 0.4 and 0.6. The method is easy and convenient to implement and has low requirement on equipment; and the obtained mortar has good insulated energy-saving effect and can be widely applied in the aspect of heat-insulation of walls in the building field.

The invention relates to the technical field of concrete admixture, in particular to a high-performance concrete expansive agent. The high-performance concrete expansive agent is prepared from, by weight, 30-40 parts of calcium sulphoaluminate, 8-16 parts of sepiolite, 4-11 parts of teflon powder, 3-9 parts of pentaerythrite, 1-4 parts of benzenediol and 5-10 parts of glass fiber powder. Shrinkage compensating of the high-performance concrete expansive agent has long effectiveness, the high-performance concrete expansive agent can be adapted to strength development of concrete, has excellent high-cracking-resistance impermeability, avoids that because cracking-resistance impermeability of concrete is insufficient, accumulated water permeability is generated, and the concrete can not be used and has high performance, and all the properties of the concrete expansive agent are improved and include the capacity of cracking resistance and impermeability, concrete compression strength and concrete breaking strength.

The invention discloses to a GHB (Glazed Hollow Bead) heat preservation and heat insulation building wall body and construction technology, and relates to the field of building energy conservation. The GHB heat preservation and heat insulation building wall body and construction technology comprises the GHB heat preservation and heat insulation building wall body and a construction technology of the GHB heat preservation and heat insulation building wall body, wherein the GHB heat preservation and heat insulation building wall body is formed by sequentially manufacturing a coarse scraping base layer, a GHB heat preservation and heat insulation layer, a seepage-proofing and anti-crack flexible plastering layer and a decorating layer on a building wall body by adopting a GHB heat preservation and heat insulation material; the GHB heat preservation and heat insulation layer is formed by GHB heat preservation and heat insulation slurry which is prepared by GHB heat preservation and heat insulation dry powder, and the seepage-proofing and anti-crack flexible plastering layer is formed by seepage-proofing and anti-crack flexible slurry which is prepared by seepage-proofing and anti-crack flexible mortar and a reinforcing net. The GHB heat preservation and heat insulation building wall body disclosed by the invention has the advantages that the heat conduction coefficient is low, the heat preservation and heat insulation effect is good, the seepage-proofing and anti-crack performance is good, safety and fire prevention can be obtained, the strength is high, environmental protection is realized, and good energy saving and consumption reducing effects of a building structure is realized; the GHB heat preservation and heat insulation building wall body and construction technology can be widely promoted and applied in the field of heat preservation and heat insulation, energy saving and consumption reducing, and safety and fire prevention of a building.

The invention relates to crack-resistant anti-seepage concrete and a preparation method thereof, and mainly solves the problem that the concrete is easy to crack and leak. The crack-resistant anti-seepage concrete comprises 280 to 290 parts of cement, 105 to 115 parts of fly ash, 790 to 800 parts of sand, 1050 to 1060 parts of crushed stone, 1 to 10 parts of a water reducing agent, 2 to 7 parts ofwhite sugar, 20 to 30 parts of a fiber expansion agent, 20 to 30 parts of a crack-resistant anti-seepage agent, 3 to 10 parts of a water repellent, 95 to 105 parts of coal gangue, 73 to 83 parts of metal silicon powder, 40 to 50 parts of iron powder, 65 to 75 parts of copper ore tailings, 10-20 parts of a reactant and 148 to 158 parts of water. The fly ash, the sand, the crushed stone and the copper mine tailings are selected as main raw materials, the production cost of the raw materials is reduced, the anti-wear and anti-erosion ability of the concrete is reduced, the durability of the concrete is improved, and the compactness of the concrete is improved. The crack-resistant anti-seepage concrete has better frost resistance and seepage resistance, and the unique crack-resistant anti-seepage agent is added to the concrete to greatly improve the crack resistance and seepage resistance of the concrete.

The invention relates to the field of concrete additives for oceanographic engineering, and aims at providing a compound-doped mineral admixture for a reinforced concrete structure of the oceanographic engineering. The compound-doped mineral admixture comprises the following components in percentage by mass: 20 to 35% of coal ash, 5 to 10% of zeolite, 20 to 40% of slag, 5 to 15% of silica fume, 5 to 15% of corrosion inhibitor, 2 to 5% of dispersing agent, 0 to 10% of shrinkage reducing agent, and 0 to 16% of antimitotic agent. According to the compound-doped mineral admixture, multi-component design is adopted, the functions of all the components are combined and coordinated, and thus the crack resistance and rust resistance of the structure are optimized, and the wear resistance of the oceanographic engineering can be improved; and a plurality of functional components are compounded into the admixture, so that the functional components can be uniformly dispersed in the concrete, and the effects of stably resisting crack and resisting rust can be realized. The compound-doped mineral admixture can reduce the concrete agitating conditions and reduce the usage cost of an enterprise, and is convenient for massive popularization and application.

The invention discloses an anti-cracking waterproof construction method for a post-poured strip. The method comprises the following steps of pouring of fine-stone waterproof concrete strips; binding of plate bottom reinforcing steel bars; installation of a lower-layer dense-hole steel wire mesh frame; installation of water-stopping steel plates; installation of an upper-layer dense-hole steel wiremesh frame; binding of plate top reinforcing steel bars; formwork hanging; pouring of concrete at the two sides of the post-poured strip; die removing and maintenance; removal of dense-hole steel wire meshes; pouring of concrete in the post-poured strip. The construction method is reasonable in design and convenient to operate, the anti-cracking and waterproof effects of the post-poured strip after construction are good, the economic benefits are increased, and meanwhile the construction quality of the post-poured strip is effectively ensured.

Currently, a road surface structure in a tunnel is composed of conventional asphalt concrete and fracture-resistant concrete or steel fiber concrete. Primary causes of road surface damage comprise direct impact of repeated crushing of rubber wheels and external environmental effects, at best, cracks and tracks are generated, the riding comfort is affected, at worst, pits and grooves are generated, and the overall stability and safety of the road surface are threatened; and even traffic is delayed for a long time during later maintenance. To improve the fracture resistance and pressure resistance of the road surface, prolong the service life of the road surface and recover the road surface rapidly during later maintenance, the invention provides a tramcar basalt fiber composite road surface structure, and the tramcar basalt fiber composite road surface structure sequentially comprises a basalt fiber concrete base layer, a basalt fiber medium grain type asphalt concrete layer and a basalt fiber asphalt mastic gravel mixed aggregate layer from bottom to top.

The invention provides a construction technology for an anti-crack and waterproof structure of a post-cast strip. The construction technology comprises the following steps that fine stone waterproof concrete strips are poured; steel bars at a slab bottom are bound; a lower-layer dense hole steel wire frame is arranged; water stop steel plates are arranged; an upper-layer dense hole steel wire frame is arranged; steel bars at a slab top are bound; a mold is hoisted; concrete on the two sides of the post-cast strip is poured; mold stripping and maintenance are carried out; the dense hole steel wire frames are disassembled; and concrete in the post-cast strip is poured (the concrete in the post-cast strip can be poured only when the design requirement deadline is reached). The construction technology aims to solve the problem that sedimentation of the concrete in the post-cast strip is caused due to the facts that in a traditional technology, a gap is reserved between a steel wire mesh and a base layer, and the concrete always flows into the post-cast strip from the gap in the vibration process of the concrete.

The invention discloses high-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The ultrahigh-strength hybrid fiber concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, CaCO3 whiskers, a carboxyl modified polyvinyl alcohol polymer and nano titanium / graphene oxide dispersion liquid according to the mixing ratio of (550-560): (760-770): (830-840): (65-70): (103- 108): (125-135): (5.4-5.6): (70-75): (20-21): (16-17): (3-3.3): (14.5-15): (7.5-8): (13.3-13.6): (21-21.5): (22-23.5): (42-46). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property and durability of the concrete and the bonding property between the concrete and the profile steel are obviously improved.

The invention relates to the technical field of concrete admixtures, and in particular relates to a concrete expansion agent. The concrete expansion agent is prepared from the following raw materials in percentage by weight: 35-45% of calcium sulphoaluminate, 1-5% of magnesium oxide, 18-25% of a plasticized water reducer, 16-23% of ultrafine mineral powder, 2-7% of sodium tripolyphosphate, 5-10% of a water holding material and 1-5% of sodium gluconate. The concrete expansion agent disclosed by the invention can be used for solving the problems of high expansion rate, insufficient shrinkage compensating effect and the like of an existing expansion agent; meanwhile, if being mixed in concrete, the concrete expansion agent disclosed by the invention can be used for improving the concrete strength in middle and later stages and properly prolonging the setting time of the concrete; and the concrete expansion agent is also excellent in high crack resistance and seepage control performance, good in adaptability, and suitable for concretes differing in strength grade.