19results about How to "Improve early strength" patented technology

The present application relates to solid waste recycling technical field, provide a kind of based on coal-based solid waste's anti-dispersion grouting material and its preparation method and application, the material is made of coal gangue, fly ash, silica ash, cellulose, water reducing agent and alkali activator, wherein, alkali activator is made of deionized water, sodium hydroxide and water glass.The based on coal-based solid waste's anti-dispersion grouting material is prepared according to following steps: after mixing coal gangue, fly ash, silica ash, cellulose and water reducing agent, stirring treatment is carried out, and powder precursor is prepared;Alkali activator is added to the prepared powder precursor, and alkali activator is made of deionized water, sodium hydroxide and water glass, continue to stir to prepare the based on coal-based solid waste's anti-dispersion grouting material.The present application can prepare the anti-dispersion grouting material of excellent fluidity, stability and mechanical property, provides innovative path for the resource of coal-based solid waste, significantly reduces material cost, improves environmental benefits and engineering application value.

This invention discloses a method for preparing an in-situ reinforced single-atom nanoenzyme bactericidal composite material for concrete. The method includes using sodium ferric ethylenediaminetetraacetate (EDTA) as a core precursor, and encapsulating calcium peroxide on its surface through an in-situ reaction to form a composite precursor of calcium peroxide encapsulating EDTA; directional hydrolysis of tetraethyl orthosilicate (TEOS) to form a thin layer of silica on the surface of the composite precursor; subsequent calcination under an inert gas to obtain a three-layer core-shell composite material of single-atom iron nanoenzyme / porous calcium peroxide / porous silica; and finally, grafting with aminosilane to obtain a three-layer core-shell composite material of single-atom iron nanoenzyme / porous calcium peroxide / porous silica with surface-grafted aminosilane. The composite material prepared by this method can achieve continuous and efficient bactericidal action in concrete while increasing nucleation sites, promoting hydration, and effectively improving the early strength and durability of concrete.

This invention relates to an early-strength agent for hypersulfate cement concrete and its application, belonging to the field of building materials. The early-strength component of the hypersulfate cement comprises, by weight, the following components: 70-80 parts C-S-H / PCE, 15-25 parts sodium hydroxide or sodium carbonate, 5-10 parts sodium lactate, and 10-20 parts lithium carbonate. This invention solves the problem of long setting time of hypersulfate cement and slow early strength development of the prepared concrete, and plays a positive role in promoting the application of hypersulfate cement.

The present application relates to the technical field of building material recycling, and more particularly to a red mud-based high-performance concrete curb and a preparation method thereof. The curb is prepared from a red mud-based cementitious material, sand, stone, water, a color agent and an additive through a certain preparation method, realizes high-value resource utilization of solid waste such as red mud, improves the performance of the red mud-based concrete curb, is green and environmentally friendly, has a simple preparation process, low cost, high economic benefits, and is suitable for popularization and application.

This invention discloses an eco-friendly high-strength concrete and its preparation method, belonging to the field of concrete material technology. The raw materials of the concrete include precursor powder, activator, sand and gravel aggregate, and water in a mass ratio of 1:(0.2-0.4):(0.2-0.4):(0.1-0.2). The precursor powder includes industrial by-product precursor powder, agricultural by-product precursor powder, and kitchen waste by-product precursor powder in a mass ratio of 1:(0.5-1.5):(2.5-3.5). The eco-friendly high-strength concrete provided by this invention mainly uses raw materials derived from solid waste, enriching the types of raw materials used in concrete preparation. It requires no high-temperature curing, and its 3-day compressive strength reaches 75.02 MPa, and its 28-day compressive strength reaches 94.88 MPa, exhibiting characteristics of low carbon emissions, environmental friendliness, simple construction, high early strength, and excellent mechanical properties.

This invention relates to the field of grouting materials technology, and more particularly to a high-temperature resistant grouting material with anti-dispersion and micro-expansion properties, its preparation method, and its application. By mass, it comprises the following components: 50-90 parts of a compound flocculation-gel system, 20-35 parts of mineral admixtures, 6.55-16.5 parts of additives, 0.5-1.5 parts of added fiber, and water; the mass of water is 0.5-1.0 times the total mass of the compound flocculation-gel system and mineral admixtures. The high-temperature resistant grouting material with anti-dispersion and micro-expansion properties provided by this invention has advantages such as resistance to high-temperature dynamic water dispersion, high strength, micro-expansion, good toughness, and high fluidity. It can be used for the reinforcement of surrounding rock and water plugging operations affected by high-temperature water, and can be applied to scenarios such as the treatment of sudden water inrush in underground engineering affected by high temperatures and the reinforcement of loose strata. It is environmentally friendly and has significant effects, with broad application prospects and extremely high economic benefits.

This invention relates to the field of building materials technology, specifically to a self-leveling mortar based on recycled solid waste materials and its preparation method. The mortar comprises the following raw materials by weight: 100 parts additives, 120-150 parts aggregates, 0.3-0.8 parts auxiliaries, 0.05-0.15 parts cellulose ethers, 0.1-0.3 parts defoamer, and 25-35 parts water. The additives consist of granulated blast furnace slag powder, fly ash microspheres, and additive powder. The aggregates are a mixture of waste glass sand and waste stone powder. This invention solves the problems of complex processes, strong corrosiveness, and inability to dry-produce traditional alkali-activated mortars through dry-powder geopolymer activation technology. The prepared mortar has high fluidity, an ultra-long construction window, high early strength, and excellent durability. This invention achieves high-value-added resource utilization of various solid wastes, with a high solid waste content in the product, significantly reducing production costs and environmental burden, and exhibiting significant economic and environmental benefits.

This invention belongs to the field of building materials technology, and relates to a smart responsive concrete admixture, its preparation method, and its application. The smart responsive concrete admixture includes a main chain and at least one smart responsive side chain and at least one nano-reinforcing side chain bonded to the main chain. The main chain includes polyether structural units and unsaturated carboxylic acid structural units. The smart responsive side chain includes block copolymer temperature-sensitive structural units and calcium ion strongly chelating structural units. Composite nanoparticles are bonded to the nano-reinforcing side chains. From the inside out, the composite nanoparticles consist of a silica core, a soluble calcium source layer, and a silane coupling agent layer. The smart responsive concrete admixture provided by this invention, by introducing smart responsive side chains and nano-reinforcing side chains onto the main chain, can decouple setting time from temperature control, thereby reducing the adiabatic temperature and maximum heat release rate while ensuring early strength.

The application relates to the technical field of concrete pavements, and discloses a reinforced material for concrete pavements and a use method thereof. The reinforced material comprises dry materials and wet materials. The dry materials are as follows: 200-400 parts of white cement clinker, 70-120 parts of modified mineral powder, 300-700 parts of tailing sand, 50-140 parts of lithium slag powder and 5-50 parts of pigment. The wet materials comprise component 1 and component 2. The component 1 is composed of 10-30 parts of nano silicon oxide sol, 10-20 parts of polyaluminum, 10-30 parts of sodium silicate, 5-20 parts of aluminum sulfate, 5-10 parts of urea and 100-300 parts of water. The component 2 is composed of 5-10 parts of glue powder, 5-10 parts of 3-aminopropyltrimethoxysilane and 80-90 parts of water. The dry materials are sprayed on the surface of the concrete by a spraying machine or are uniformly vibrated on the surface of the concrete by a vibrating screen, and the wet materials are sprayed on the surface of the concrete by a sprayer, and then are collected and smoothed, so that the problems of low strength, easy falling and alkali return of the traditional reinforced material are solved.

This invention discloses an all-solid-waste alkali-activated cementitious material and its preparation method, relating to the field of building materials technology. The cementitious material, by weight, comprises the following components: 300-400 parts blast furnace slag, 150-350 parts glass powder, 30-200 parts red brick powder, 40-70 parts desulfurized gypsum, 160-260 parts alkali activator, 10-30 parts sodium sulfate, 30-40 parts sodium tripolyphosphate, 0.4-5 parts silane coupling agent, and 200-400 parts water. This invention utilizes various industrial wastes such as blast furnace slag, glass powder, red brick powder, and desulfurized gypsum to prepare an all-solid-waste alkali-activated cementitious material. It possesses excellent mechanical properties, outstanding durability, and strong environmental adaptability, improving the utilization rate of industrial solid waste, reducing the use of traditional cementitious materials such as cement, lowering resource dependence and production costs, and promoting the low-carbon transformation of building materials.

The present application belongs to floor mudstone processing technical field, and concretely relates to a kind of floor mudstone rapid reinforcement material and reinforcement method.The floor mudstone rapid reinforcement material of the present application includes, by mass fraction:A material:40-60 parts of sulphoaluminate cement, 15-40 parts of Portland cement and 1-2 parts of naphthalene series water reducing agent, also includes initiator, crosslinking agent and oxidation-reduction agent;B material:80-100 parts of gypsum, 10-30 parts of acrylamide and 2-4 parts of aluminate ester coupling agent.The floor mudstone rapid reinforcement material of the present application can harden in situ the site mudification floor, form the floor hardening layer that meets the load bearing condition, reduce the artificial cost and time cost caused by cleaning floor mudification, guarantee the smoothness of traffic, speed up engineering progress, improve engineering benefit and economic benefit.

The application relates to the technical field of building plugging materials, and particularly provides a long-operable-time plugging material, which is prepared from the following raw materials in terms of total weight: 0.02-3% of a retarder, 0.005-2% of a calcium salt, 0.001-1% of a cellulose ether and cement supplementing to 100%. By optimizing the types of the retarder, the calcium salt and the cellulose ether and by stipulating the relative amounts of the retarder, the calcium salt and the cellulose ether, the quick-setting type plugging material has a relatively long retarding time, and the anti-bending performance, the anti-permeation performance, the bonding performance, the heat resistance and the freeze-thaw cycle resistance of the material after solidification are effectively improved.

The application provides a kind of improved sulphate saline soil road base road building material and preparation method, the improved sulphate saline soil road base road building material includes the following raw material components: by mass percentage, steel slag 1~3.45%, fly ash 1~3.45%, cement 0.55~1.77%, sodium hydroxide 0.54~1.7%, water 1.68~6.38% and sulphate saline soil 83.25~95.23%, the mass percentage of each component is 100%, and the preparation method includes: step 1, the formula amount of steel slag, fly ash, cement is dried and then ground and mixed, then mixed with the formula amount of water and stirred uniformly to prepare mixed liquor A; the formula amount of NaOH is prepared to obtain 10mol / L NaOH solution; step 2, mixed liquor A and the NaOH solution prepared in step 1 are mixed to prepare geopolymer; step 3, the geopolymer is mixed with the formula amount of sulphate saline soil to obtain the product. The improved material provided by the application has the characteristics of good low-temperature resistance, strong anti-freeze-thaw cycle ability, good impermeability, small expansion, good volume stability, and high mechanical properties of the reinforced soil body.

This invention relates to a nano-metakaolin-modified hydraulic lime-based composite material and its preparation and application. The composite material comprises natural hydraulic lime and nano-metakaolin dispersed in the natural hydraulic lime, wherein the mass ratio of natural hydraulic lime to nano-metakaolin is (60-90):(10-40). The nano-metakaolin-modified hydraulic lime-based composite material of this invention exhibits controllable dispersibility and fluidity in the slurry after mixing with water. It also demonstrates good rock compatibility, low soluble salt content, controllable curing time, suitable post-curing strength, low permeability, and low shrinkage and expansion rate. The presence of a repair agent can specifically enhance the additional protective performance of the reinforcement material. It possesses high applicability, safety, and durability for the protection of stone cultural relics, without causing derivative damage.

The application provides a method for improving early activity of cement by refining activated belite minerals, and belongs to the field of building materials. In the clinker calcination process, the first step is to control the firing temperature to be 1100-1200 DEG C, and the holding time is 1-2 h, so that a large amount of C5S2$ minerals are generated; the second step is to increase the calcination temperature to 1280-1320 DEG C, and the holding time is 1-2 h, so that the C5S2$ minerals are not completely decomposed, and most of them are converted into alpha'-C2S and C$ clinker minerals with small grain size. In addition, the mineralization technology is used to promote the generation of a large amount of C3S at about 1300 DEG C, the ion doping is used to distort the C2S mineral lattice and the C3S mineral lattice, and the crystal defects of the high belite cement clinker minerals are increased, so that the grain size of the clinker minerals is refined. The above-mentioned methods work together, the grain size of the high belite cement clinker is refined, and the early activity of the high belite cement is improved. The preparation method solves the problems of low early activity of the high belite cement, and the prepared high belite cement clinker has the characteristics of small grain size and containing alpha'-C2S minerals.

The utility model relates to calcium silicate plate processing technical field especially is a kind of high-strength moisture-proof fibre reinforced calcium silicate plate mould, including workbench, two slide rails are fixedly installed in the middle of workbench upper end, installation plate is fixedly installed in the middle rear portion of workbench upper end, push mechanism is fixedly installed in the rear end of installation plate, the left rear portion of workbench upper end and upper end right rear portion are all fixedly connected with support plate, two the support plate upper end is fixedly connected with the connection top plate of common, compaction mechanism is fixedly installed in the middle of the connection top plate upper end, a kind of high-strength moisture-proof fibre reinforced calcium silicate plate mould of the utility model, when adding slurry and taking out forming plate, mould base is pushed to the front of workbench by electric push rod, so that personnel can be separated from compaction plate operating area, avoid the risk, such as mechanical extrusion, component splashing, that may appear in compaction process, improve operating safety.

The application discloses a kind of ultrafast hard seawater mixing based on sodium-aluminum ratio geopolymer and its proportioning correction and preparation method.The material takes metakaolin-based geopolymer as base material, by mixing quartz sand, hardening agent, chloride ion curing agent, sulfate ion curing agent and different materials, and is prepared by using seawater mixing and curing.The application controls setting time by adjusting system sodium-aluminum ratio, and uses multi-component synergistic effect to cure erosive ions, finally realizes the design purpose of early strength fast hardening and erosion resistance of geopolymer.The proportioning correction method of the ultrafast hard seawater mixing based on sodium-aluminum ratio geopolymer of the application reversely corrects mix proportion according to setting time requirement, with adjustable setting time;The preparation method of the ultrafast hard seawater mixing based on sodium-aluminum ratio geopolymer of the application has simple operation steps, does not need high-temperature forming and curing, and can be widely applied to pouring, reinforcement and repair of offshore engineering or coastal structures.

This invention belongs to the field of functional building material preparation technology, specifically relating to a fire-resistant composite geopolymer and its preparation method. The raw materials of the fire-resistant composite geopolymer, by mass percentage, include the following components: (35%~65%): (20%~40%): (20%~35%): (1.5%~3.5%) fly ash, sand, alkali activator solution, and polyethyleneimine-modified halloysite nanotubes. This invention effectively controls the fire resistance and mechanical hardness of the material by regulating the surface properties of halloysite nanotubes and uniformly dispersing them in the geopolymer matrix. Furthermore, through static pressing and heating, the shape and thickness of the bricks can be precisely controlled, resulting in products with good structural shape stability.