CN102603238B - Duct grouting slurry with low water-binder ratio and preparation method thereof - Google Patents
Duct grouting slurry with low water-binder ratio and preparation method thereof Download PDFInfo
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Abstract
The invention provides a duct grouting slurry with low water-binder ratio for a post-tensioned prestressed concrete beam. At the construction site, the duct grouting slurry only needs to be mixed with water uniformly according to the ratio so as to be used for duct grouting. The duct grouting slurry comprises a cementing material, a plasticizing agent, an expanding agent, a water-retaining agent, a stabilizing agent, a retarder, a steel bar corrosion inhibitor and an early strength agent. The duct grouting slurry has the advantages that the water-binder ratio is small (0.26-0.32), the flowability is good and is only 10-22 seconds, the early strength is high (reaching up to 20MPa in 3h), slurry cannot be layered or cannot weep water, and only expands slightly, is good in filling extent and volume stability, convenient in site operation and is particularly suitable for construction in winter and suitable for the project which needs to be completed in shorter time.
Description
Technical field
The present invention relates to a kind of hole path pressure grouting material and preparation method thereof, this hole path pressure grouting material is mainly used in the hole path pressure grouting of post-tensioned prestressing concrete beam, is especially suitable for winter construction.
Background technology
Along with the fast development of China's economy, capital construction has entered the period of a fast development, and motorway almost spreads to each administrative counties and cities.Construction quality is directly connected to the people's lives and property safety.The Main Function of pipeline pneumatic mortar is to protect deformed bar not expose to exempt from corrosion; make deformed bar and concrete beam body have good cohesiveness; guarantee prestressed effective transmission, eliminate or the fatigure failure that STRESS VARIATION causes ground tackle under course under cyclic loading of alleviation prestressed concrete structure.In order to guarantee the quality of road construction, Department of Transportation issued and has implemented new < < highway bridge and culvert construction technique normalizing JTG/T F50-2011 > > on August 1st, 2011, and prestressed concrete beam hole path pressure grouting has been done to new regulation.After new standard is implemented, a lot of traditional grouting agents and on-the-spot cement is composite is difficult to reach standard-required, and the unstable of cement has had a strong impact on construction quality.Some Cast-in-situ Beam engineering causes the duration tight because of each side reason in addition, and common grouting material nearly all needs seven days because reaching design strength, and winter is even longer, has affected the duration.The present invention is in conjunction with the standard of new issue, and low water binder ratio, high fluidity, high without bleeding, early strength, to facilitate site operation be research of technique point of the present invention.
Summary of the invention
For new standard, implement the bad cement of rear some adaptability and traditional composite problem that does not reach standard-required of grouting agent, the object of this invention is to provide a kind of hole path pressure grouting material that can meet new < < highway bridge and culvert construction technique normalizing JTG/T F50-2011 > > standard-required.
Therefore, aspect first, the invention provides a kind of hole path pressure grouting material, the raw material of described grouting material comprises gelling material, fluidizer, swelling agent, water-holding agent, stablizer, retardant and reinforcing steel bar corrosion inhibitor, and the proportioning of said components is as follows:
In another embodiment of hole path pressure grouting material of the present invention, its raw material also comprises the hardening accelerator of 2～3 weight parts, and particularly preferably calcium formiate, ferric sulfate or embryos are main component without alkali high-efficiency hardening accelerator (HL-10C early strength antifreezing agent).
Aspect second, the invention provides the preparation method of hole path pressure grouting material, said method comprising the steps of: adopt progressively dilution method first the raw material that in said components, the content except gelling material is less to be dropped in small-sized colloid pulverizer, add again the raw material that content is higher, mix grinding 5～10 minutes, sieve, control granularity and be less than 60 μ m, dropping into large-scale mixer mixes with gelling material again, mix 10～15 minutes, obtain described grouting material, wherein for liquid fluidizer, before carrying out above-mentioned steps, first this liquid state fluidizer is sprayed into distribution Powdered uniformly, with 60 mesh sieve screen over-sizes, be less than 1%, and then prepare grouting material according to the method in above-mentioned steps.
Beneficial effect of the present invention:
1. water-cement ratio little (0.26～0.32), good fluidity 10～22 seconds, early strength high (can reach 20MPa in 3 hours).
2. the not stratified not bleeding of slurry, microdilatancy, fullness degree and volume stability are good, and site operation is convenient.Not only make the flowing property of slurry greatly improve, solved the uncompacted common fault of grouting, the strength factor of assurance also increases.Containing alkali (kalium ion and natrium ion) hardening accelerator, exist and saltout, excite the defects such as alkali-aggregate reaction and inferior suitability, the present invention has overcome above-mentioned defect, the engineering that is specially adapted to winter construction and needs to complete within a short period of time.Save place, reduced labour cost, saved the energy.
3. relative low price, durable in use, and structural strength is high, and environmentally safe belongs to " green injecting paste material ".
Embodiment
The raw material of hole path pressure grouting material of the present invention comprises gelling material, fluidizer, swelling agent, water-holding agent, stablizer, hardening accelerator, retardant etc.Hole path pressure grouting material of the present invention can be applicable to the hole path pressure grouting of post-tensioned prestressing concrete beam.So-called " post stretching ", refers to first joints cement concrete, wait reach design strength more than 75% after again stretch-draw prestressing force steel with the constructional method of formation prestressed concrete member.
Gelling material is under physics, chemical action, from having the slurry of mobility, to become firm Shi Zhuanti, and the cementing unclassified stores of energy, has the material of certain physical strength.Generally be divided into inorganic and organic two large classes, wherein organic gel gel material comprises pitch and various resins etc., and inorganic coagulation material comprises hydraulic cementing materials and on-hydraulic gelling material.Hydraulic cementing materials is commonly referred to cement, and it can harden and can in water, harden again after mixing water in air, but not hydraulic cementing materials can only harden in air or under other conditions, as lime or gypsum etc.In the present invention, gelling material is generally selected inorganic coagulation material, preferred inorganic polymer gelling material, is more preferably selected from a kind of in ordinary Portland cement, quick hardening sulphoaluminate cement, superfine cement and modified superfine cement or two or more arbitrary combination in them.Its selection is unrestricted, and those skilled in the art can select which kind of cement or cement to combine as gelling material for required application scenario as required.
In Cement industry field, fluidizer generally refers to the reinforcement of concrete fluidizer, i.e. water reducer, and it can increase the workability convenient construction of mixture, is difficult for producing honeycomb, thereby can reduces moisture ratio, gains in strength.Fluidizer in the present invention is poly carboxylic acid (salt) water reducer preferably.Poly carboxylic acid (salt) water reducer is by the molecular structure manually designing, on main chain, also have and can make the charged sulfonate of cement granules or other group, can play the effect of traditional water reducer, once the more important thing is that main chain is adsorbed on after cement particle surface, a chain formation flyover of side chain and other particle surface, hinder particle close to each other, thereby reached dispersion (being diminishing) effect.This sterically hindered effect does not weaken with time lengthening, and therefore, the dissemination of poly carboxylic acid (salt) water reducer is more lasting.Not only water-reducing rate is high than other water reducers for poly carboxylic acid (salt) water reducer, and volume is less, ready mixed concrete 2h little loss of slump, and workability of concrete is good.In addition poly carboxylic acid (salt) water reducer and different varieties cement and adulterant consistency are good, and concrete shrinkage is little, alkali content extremely low and when low temperature without Precipitation, be therefore suitable for winter construction.In the present invention, the use of poly carboxylic acid (salt) water reducer is unrestricted, the example can be for its particular content of third generation high-performance water reducing agent HL-8010(referring to the present patent application people in another Chinese invention patent application 201110433678.5 of on December 21st, 2011 application, during the full content of this invention is incorporated herein), HL-8000 poly carboxylic acid dry powder water reducer, HL-8000 protect plastotype polycarboxylate water-reducer etc.
Brief description third generation high-performance water reducing agent HL-8010 and preparation method thereof:
Above-mentioned high-performance water reducing agent HL-8010 is polycarboxylate dehydragent, and it is formed by the monomer copolymerization that comprises following component:
(1) macro molecules monomer, described macro molecules monomer is methoxy poly (ethylene glycol) (methyl) acrylate (represents with MPEGMAA or MPEGAA, with regard to the performance of the water reducer that obtains, preferred MPEGMAA), it accounts for 9～30% of total monomer weight, and preferably 10～20%;
(2) ethers macromonomer, described ethers macromonomer is for to be selected from least one in allyl polyethenoxy ether (APEG) or methyl thiazolinyl Soxylat A 25-7 (TPEG), and it accounts for 63～82% of total monomer weight, and preferably 70～80%;
(3) small molecule monomer, described small molecule monomer is one or more the mixture being selected from vinylformic acid, methacrylic acid and corresponding salt thereof, described small molecule monomer accounts for 6～15% of total monomer weight, preferably 9～11%, from the viewpoint of the water reducer performance two of price and acquisition, the preferred vinylformic acid of described small molecule monomer.
In this high performance water reducing agent of polyocarboxy acid, MPEGMAA or MPEGAA by methoxy poly (ethylene glycol) (MPEG) and (methyl) vinylformic acid (MA or MAA) take the vitriol oil as catalyzer, Resorcinol and thiodiphenylamine as stopper temperature during as 120 ± 5 ℃ esterification form.With regard to the water reducer performance obtaining, preferred MPEGMAA.
In a preferred embodiment of this polycarboxylate dehydragent, monomer whose also comprises component (4) expanding material, described expanding material is one or more the mixture being selected from toxilic acid, maleic anhydride and corresponding salt thereof, preferred maleic anhydride, wherein the mol ratio of component (3) small molecule monomer and component (4) expanding material is 2～4:0.1～0.5, preferably 3:0.2.
In an embodiment of this polycarboxylate dehydragent, component (1) is 1:3～1:10 with the mol ratio of component (2).In another embodiment of this polycarboxylate dehydragent, the mol ratio of component (1) and both summations of component (2) and component (3) is 1:2.5～1:3.5.
According to CN201110433678.5, the preparation method of this high-performance water reducing agent HL-8010 comprises the following steps:
(1) to reactor, add deionized water, then add 63～82 weight parts, the preferred ethers macromonomer of 70～80 weight parts, is mixed with the solution of 55～65 % by weight, is warming up to 50～80 ℃, and preferably 60～70 ℃, general 60 ℃ dissolve it completely;
(2) after material all dissolves in question response still, then add 2～10% of total monomer weight in reactor, preferred 4～6% peroxide aqueous solution, described peroxide aqueous solution is that concentration is 2% hydrogen peroxide;
(3) by 6～15 weight parts, preferably the small molecule monomer of 9～11 weight parts and chain-transfer agent are expected as A with the solution that deionized water is mixed with 20～30 % by weight, and wherein chain-transfer agent is 3～5% of described small molecule monomer weight;
(4), by 9～30 weight parts, preferably the macro molecules monomer of 10～20 weight parts is B material with the solution that deionized water is mixed with 60～70 % by weight;
(5) while drips A material and B material to reactor, and the time is 2～4 hours, and preferably 3 hours, after dropping finishes, at 60 ℃～70 ℃, preferably 60 ℃～65 ℃ were incubated 2～4 hours;
(6) after insulation finishes, by reaction product be cooled to 40～55 ℃ following and add deionized water reaction product is diluted to 40% weight, then with alkaline solution, pH value is adjusted to 6～7, wherein
Described macro molecules monomer is methoxy poly (ethylene glycol) (methyl) acrylate (representing with MPEGMAA or MPEGAA); Described ethers macromonomer is for being selected from a kind of in allyl polyethenoxy ether (APEG) or methyl thiazolinyl Soxylat A 25-7; With described small molecule monomer be one or more the mixture being selected from vinylformic acid, methacrylic acid and corresponding salt thereof, from the viewpoint of the water reducer performance two of price and acquisition, preferred vinylformic acid.
In aforesaid method, MPEGMAA or MPEGAA by methoxy poly (ethylene glycol) (MPEG) and (methyl) vinylformic acid (MA or MAA) take the vitriol oil as catalyzer, Resorcinol and thiodiphenylamine as stopper temperature during as 120 ± 5 ℃ esterification form.With regard to the water reducer performance obtaining, preferred MPEGMAA.
In above-mentioned preparation method's a embodiment, the mol ratio of macro molecules monomer and ethers macromonomer is 1:3～1:10.In another embodiment of above-mentioned preparation method, macro molecules monomer and the summation of ethers macromonomer and the mol ratio of small molecule monomer are 1:2.5～1:3.5.
In above-mentioned preparation method's preferred embodiment, in the step (1) of described method, also comprise to 0.08～0.15% the expanding material that adds total monomer weight in reactor, described expanding material is one or more the mixture being selected from toxilic acid, maleic anhydride and corresponding salt thereof, preferably maleic anhydride.
In one embodiment, the mol ratio of small molecule monomer and expanding material is 2～4:0.1～0.5, preferably 3:0.2.
The chain-transfer agent using in aforesaid method is restriction especially not, but one or more in general preferably selected from mercapto propionic acid, Thiovanic acid, mercaptoethanol or Dodecyl Mercaptan, preferred thiohydracrylic acid, the consumption of described chain-transfer agent is whole total monomer weights 0.3～0.5%.
In addition, in above-mentioned preparation method, hydrogen peroxide is as oxygenant, and its consumption is total monomer weight 2～10%, and preferably 4～6%, the general hydrogen peroxide that is diluted to 2% that uses.Should be noted, in the method, without the extra reductive agent that adds.
In above-mentioned preparation method, for regulating the alkali lye of pH unrestricted, it can be as known in the art for regulating the alkali aqueous solution of pH value, and described alkali, as NaOH, KOH etc., is generally used NaOH.
Swelling agent is a kind of chemical admixture, is added in cement, and when cement setting hardens, volumetric expansion thereupon, plays compensate for shrinkage and tension reinforcing steel bar and produce prestress and abundant filling concrete gap.Its type comprises alumite plumping agent, sulphoaluminate expander, calcium oxide swelling agent, iron filings swelling agent and calcium oxide-calcium sulphoaluminate composite expanding agent etc.In the present invention, swelling agent can be any swelling agent that is applicable to high strength highway pavement or bridge concrete surface layer, culvert etc., and the example is to be selected from a kind of in UEA swelling agent, AUA swelling agent, HEA swelling agent, CSA concrete anticracking economization agent and DenKa20# swelling agent or their arbitrary combination.
Water-holding agent is the admixture that can control cement concrete bleeding performance, and its principle is to add in cement concrete to regulate cement granules distributed architecture, hinders cement bleeding passage.The water-holding agent using is in the present invention preferably one or both compound compositions of SILICA FUME, methylcellulose gum.
The concrete stablizer using is in the present invention polyacrylamide, polyacrylamide is high molecular weight water soluble polymer, is insoluble to most of organic solvents, has good flocculence, can reduce the frictional resistance between liquid, for grouting material, can effectively suppress the phenomenon of slurry layering.
Retardant is to delay cement setting time and admixture that later strength is had no significant effect.Main component is polyol, hydroxycarboxylate and derivative thereof, high sugared sulfonated lignin, because it has water-reduction concurrently, also claims retardation water reducing agent.In addition, some inorganic salt also have delayed coagulation as zinc chloride, borate, various phosphoric acid salt.Can optionally use retardant in the present invention, a kind of in Sunmorl N 60S, citric acid and tripoly phosphate sodium STPP of the retardant that can use in the present invention or two or more arbitrary combination mix proportion in them, its effect is the hydration and hardening time that extends cement, make newly to mix slurries and can keep in a long time plasticity, thereby regulate the time of coagulation of newly mixing slurries.When two or more retardant is used in conjunction with, preferably in combination, various retardant coordinate in equal ratio.
Reinforcing steel bar corrosion inhibitor is to mix in concrete to stop or to slow down the admixture of steel bar corrosion, and it can be divided into the type of mixing and osmosis type by use-pattern.The present invention adopts and mixes steel bar rust inhibitor, particularly amino alcohol rust inhibitor, as MuCis mia200, MuCis ad19L/D etc.
Hardening accelerator refers to and can improve cement early strength, and the admixture that later strength is not made significant difference.The Main Function of hardening accelerator is to accelerate hydrated cementitious speed, promotes the development of cement early strength, is used for temperature below 0 ℃ and need in construction that early strength is high.A kind of without in alkali high-efficiency hardening accelerator (HL-10C early strength antifreezing agent) that can be for the hardening accelerator example in the present invention that to be selected from Quilonum Retard, calcium formiate, ferric sulfate and the embryos of take be main component, wherein HL-10C early strength antifreezing agent not only can be used as hardening accelerator use, also can be used as frostproofer.By adopting the grouting material of interpolation hardening accelerator of the present invention can obtain higher early strength (can reach 20Mpa in 3 hours).
In the present invention, the kind of water reducer, consumption and size-grade distribution are extremely important.The in the situation that of identical water consumption, the water reducer of excellent property can increase substantially the degree of mobilization of slurries, secondly, the water reducer of suitable deal could effectively solve slurry fluidity problem: consumption is too small, cross the too thick construction requirement that do not reach of mobility at least, excess can cause that degree of mobilization is excessive and cause the layering of slurry bleeding.Water reducer granular size will guarantee that 60 mesh sieve screen over-sizes are less than 1%, and the particle of final grouting material is wanted <60 μ m.Particle there will be too greatly the phenomenon that is difficult to mix, and causes the error of finished product initial flow degree when application to surpass 5%, the stability that can not ensure the quality of products.
Below in conjunction with specific embodiment explanation the present invention, be noted that the following examples are only for providing the preferred embodiment of the present invention, but not limit the scope of the invention.
According to instruction of the present invention and disclosure, hole path pressure grouting material of the present invention can be according to various demands, selecting within the scope of the invention the raw materials such as different gelling material, fluidizer to form the dissimilar hole path pressure grouting material with different characteristics, is non-limiting example below:
Embodiment 1 (coventional type hole path pressure grouting material)
Each component parts by weight are as follows:
Embodiment 2(protects plastotype hole path pressure grouting material)
Each component parts by weight are as follows:
Embodiment 3(early-strength type hole path pressure grouting material)
Each component weight ratio is as follows:
Embodiment 4(early-strength type hole path pressure grouting material)
Each component weight ratio is as follows:
Embodiment 5 (coventional type hole path pressure grouting material)
Preparation method:
(1) HL-8010 polycarboxylate water-reducer is liquid product, and the first employing Powdered water reducer that the electric high-speed centrifugal atomizer spraying of transformation obtains being evenly distributed voluntarily, is less than 1% with 60 mesh sieve screen over-sizes;
And then adopt progressively dilution method to mix (2).First the raw material of trace in the other materials except gelling material in said components is dropped in small-sized colloid pulverizer, add again the composition that content is higher, the various components of machining drop into small-sized colloid pulverizer mix grinding 5～10 minutes in proportion, sieve, and control granularity and be less than 60 μ m;
(3) drop into again large-scale mixer and mix with gelling material, mix 10～15 minutes, obtain described grouting material product.
According to said ratio, after mixing, obtain grouting material, according to < < highway bridge and culvert construction technique normalizing JTG/T F50-2011 > >, two schemes (embodiment 1 and 3) result is detected, its result is as follows:
Embodiment 6 engineering example
This pipeline pneumatic mortar material, since succeeding in developing, has been applied in numerous post-tensioned prestressing grouting works, obtains good effect, has guaranteed the quality of prestressed grouting.
1, good fortune silver high speed Jiujiang Changjiang River Highway Bridge
Fu Yin high speed Jiujiang Changjiang River Highway Bridge is one of 70 span length river road channels that in July, 2004, National Development and Reform Committee's planning was determined, be the important component part of Foochow to Yinchuan main line in " 7918 " national freeway network planning, the First of Ye Shi Jiangxi Province construction has the span length river bridge on highway of world lead level.
The B2 contract section that middle friendship two boat offices undertake the construction of is Bridge North Main bridge, and 2064 meters of total lengths have adopted HL-P pipeline pneumatic mortar material (embodiment 1 grouting material) in the prestressed grouting of bridge, grouting material ratio of water to material is 0.27, through on-the-spot proportioning test, and cement initial flow degree 15 seconds, within 30 minutes, degree of mobilization is 17 seconds, slurries are without bleeding, 28 days test block folding strength 14.8MPa, ultimate compression strength 86.6MPa, grouting to 2011 starts year September, to observation at present, be in the milk closely knit, without unusual phenomenon.
2, the south of the River, Hubei motorway
South of the River motorway is positioned on the south the Changjiang river, Jingzhou City, Hubei Province, is the 5th horizontal a section of Hubei Province's skeleton highway network planning " 6 vertical 5 horizontal 1 ring ".Laohekou, to the part (Hubei Province is numbered S63) on the south Shishou motorway the Changjiang river, is also a part for Yueyang to Yichang motorway.
The south of the River that middle iron is undertaken the construction of for the 23 innings HL-P pipeline pneumatic mortar material (embodiment 3 grouting materials) that a mark prestressed girder hole path pressure grouting adopts at a high speed, this grouting works to 2011 year November, site operation ratio of water to material 0.28, degree of mobilization is good, construct smooth and easy, it is closely knit that the later stage is observed grouting, and effect is remarkable.
3, the south water to north is drawn Jiang Jihan engineering
The south water to north is drawn Jingzhou City, Shayang County, Qianjiang City that Jiang Jihan engineering is positioned at Hubei Province, draws Jiang Jihan navigation engineering by the navigation channel standard construction of restricted III level, current 1000 tonnes of boats and ships.Design liaison ship type is that 1000 tonnes of single-row Ding Er train of barges take into account 1000 tonnes of freighters, and navigation fraction is 97%.Draw Jiang Jihan navigation engineering navigation channel mileage and be about 66.31 kilometers.The main construction project of engineering has newly-built the Changjiang river, Han River import and export ship lock, newly excavates 5 kilometers and connects navigation channels, river, and to intersecting 37Chu highway with course line, 1 place's railroad bridge and 35 foot bridges are reconstructed, and make it reach standard for navigation.The mark engineering that middle iron is undertaken the construction of for 11 innings, prestressed concrete beam hole path pressure grouting has adopted HL-P pipeline pneumatic mortar material (embodiment 5 grouting materials), in construction process, we have surveyed on-the-spot size performance, construction ratio of water to material 0.28, initial flow degree 14.6 seconds, after half an hour, record degree of mobilization 17.2 seconds, mud jacking is smooth and easy, is in the milk closely knit, within 7 days, ultimate compression strength reaches 55.6MPa, meets standard and construction requirement completely.
For ease of understanding, provided the Preparation Example of high-performance water reducing agent HL-8010 below, these embodiment are all documented in Chinese patent application CN201110433678.5:
Preparation Example 1
Add 3000ml flask to be warmed up to 70 ℃ MPEG (molecular weight is 1200) 2200g, after dissolving completely, it adds stopper thiodiphenylamine 0.40g, Resorcinol 2g, stir and add again methacrylic acid 438g after 2～3 minutes, stir and add again vitriol oil 41g after 2～3 minutes, be warmed up to 120 ± 5 ℃ of insulations 6 hours, be incubated after 1.5 hours and start 3 hours dehydration raising esterification yields of inflated with nitrogen, be cooled to 70 ℃ of following MPEGMAA of generation.
APEG1600g and deionized water 1000g are added to 5000ml flask, be warmed up to 60 ℃, after APEG dissolves completely, add and be diluted to 2% hydrogen peroxide 110g, A material (water 580g+AA200g+SA9.8g) B material (MPEGMAA180g+ water 120g) 3h is evenly dripped, at 60 ℃～65 ℃ insulation 2h, be cooled to 45 ℃, add 30%NaOH to regulate left and right, pH value=6.5, finally add water that product is adjusted to 40% and store for future use.
Preparation Example 2
Prepare MPEGMAA with mode identical in Preparation Example 1.
APEG1500g, MA15g and deionized water 950g are added to 5000ml flask, be warmed up to 60 ℃, after APEG dissolves completely, add and be diluted to 2% hydrogen peroxide 110g, A material (water 580g+AA190g+SA9.3g) B material (MPEGMAA300g+ water 200g) 3h is evenly dripped, at 60 ℃～65 ℃ insulation 2h, be cooled to 45 ℃, add 30%NaOH to regulate left and right, pH value=6.5, finally add water that product is adjusted to 40% and store for future use.
Preparation Example 3
Prepare MPEGMAA with mode identical in Preparation Example 1.
APEG1400g, MA25g and deionized water 950g are added to 5000ml flask, be warmed up to 60 ℃, after APEG dissolves completely, add and be diluted to 2% hydrogen peroxide 110g, A material (water 580g+AA180g+SA8.8g) B material (MPEGMAA400g+ water 266g) 3h is evenly dripped, at 60 ℃～65 ℃ insulation 2h, be cooled to 45 ℃, add 30%NaOH to regulate left and right, pH value=6.5, finally add water that product is adjusted to 40% and store for future use.
Preparation Example 4
Adopt MPEG and the Dutch treatment for MPEGAA with similar mode in Preparation Example 1.
TPEG1400g, toxilic acid 20g and deionized water 950g are added to 5000ml flask, be warmed up to 60 ℃, after TPEG dissolves completely, add and be diluted to 2% hydrogen peroxide 110g, A material (water 580g+AA180g+SA8.8g) B material (MPEGAA400g+ water 266g) 4h is evenly dripped, at 60 ℃～65 ℃-insulation 2h, be cooled to 40 ℃, add 30%NaOH to regulate left and right, pH value=7, finally add water that product is adjusted to 40% and store for future use.
Preparation Example 5
Adopt MPEG and the Dutch treatment for MPEGAA with similar mode in Preparation Example 1.TPEG1500g, toxilic acid 15g and deionized water 950g are added to 5000ml flask, be warmed up to 60 ℃, after TPEG dissolves completely, add and be diluted to 2% hydrogen peroxide 110g, A material (water 580g+MAA180g+SA8.8g) B material (MPEGAA300g+ water 200g) 2h is evenly dripped, at 60 ℃～65 ℃ insulation 2h, be cooled to 55 ℃, add 30%NaOH to regulate left and right, pH value=6, finally add water that product is adjusted to 40% and store for future use.
Claims (13)
1. a hole path pressure grouting material, is characterized in that the raw material of described grouting material comprises gelling material, fluidizer, swelling agent, water-holding agent, stablizer, retardant and reinforcing steel bar corrosion inhibitor, and the proportioning of said components is as follows:
Wherein said fluidizer is HL-8010 polycarboxylate water-reducer, and described HL-8010 polycarboxylate water-reducer is formed by the monomer copolymerization that comprises following component:
(1) macro molecules monomer, described macro molecules monomer is methoxy poly (ethylene glycol) (methyl) acrylate, it accounts for 9～30% of total monomer weight;
(2) ethers macromonomer, described ethers macromonomer is at least one being selected from allyl polyethenoxy ether and methyl thiazolinyl Soxylat A 25-7, it accounts for 63～82% of total monomer weight;
(3) small molecule monomer, described small molecule monomer is one or more the mixture being selected from vinylformic acid, methacrylic acid and corresponding salt thereof, described small molecule monomer accounts for 6～15% of total monomer weight; With
(4) expanding material, described expanding material is one or more the mixture being selected from toxilic acid, maleic anhydride and corresponding salt thereof, wherein the mol ratio of component (3) small molecule monomer and component (4) expanding material is 2～4:0.1～0.5.
2. hole path pressure grouting material according to claim 1, is characterized in that described gelling material is inorganic coagulation material.
3. hole path pressure grouting material according to claim 2, is characterized in that described gelling material is inorganic polymer gelling material.
4. hole path pressure grouting material according to claim 2, is characterized in that described gelling material is selected from a kind of in ordinary Portland cement, quick hardening sulphoaluminate cement, superfine cement and modified superfine cement or their arbitrary combination.
5. hole path pressure grouting material according to claim 1, is characterized in that described swelling agent is selected from a kind of in UEA swelling agent, AUA swelling agent, HEA swelling agent, CSA concrete anticracking economization agent and DenKa20# swelling agent or their arbitrary combination.
6. hole path pressure grouting material according to claim 1, is characterized in that described water-holding agent is one or both compound compositions of SILICA FUME, methylcellulose gum.
7. hole path pressure grouting material according to claim 1, is characterized in that described stablizer is polyacrylamide.
8. hole path pressure grouting material according to claim 1, is characterized in that a kind of in Sunmorl N 60S, citric acid and tripoly phosphate sodium STPP of described retardant or their arbitrary combination mix proportion.
9. hole path pressure grouting material according to claim 1, is characterized in that described reinforcing steel bar corrosion inhibitor is for mixing steel bar rust inhibitor.
10. hole path pressure grouting material according to claim 9, is characterized in that described reinforcing steel bar corrosion inhibitor is amino alcohol rust inhibitor.
11. according to the hole path pressure grouting material described in any one in claim 1-10, it is characterized in that described raw material also comprises the hardening accelerator of 2～3 weight parts.
12. hole path pressure grouting material according to claim 11, is characterized in that described hardening accelerator is that calcium formiate, ferric sulfate or the embryos of take are main component without alkali high-efficiency hardening accelerator.
13. according to the preparation method of the hole path pressure grouting material described in any one in claim 1-12, and described method comprises:
Adopt progressively dilution method first the raw material that in said components, the content except gelling material is less to be dropped in small-sized colloid pulverizer, add again the raw material that content is higher, mix grinding 5～10 minutes, sieve, control granularity and be less than 60 μ m, dropping into large-scale mixer mixes with gelling material again, mix 10～15 minutes, obtain described grouting material, if wherein fluidizer is liquid, before carrying out above-mentioned steps, first this liquid state fluidizer is sprayed into distribution Powdered uniformly, with 60 mesh sieve screen over-sizes, be less than 1%, and then prepare grouting material according to the method in above-mentioned steps.
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| CN103288396B (en) * | 2013-05-07 | 2015-03-25 | 广州市和易建材实业有限公司 | Highway post-tensioning method prestressed concrete beam channel pressure slurry material, and preparation method thereof |
| CN103408237B (en) * | 2013-07-17 | 2015-06-03 | 安徽中铁工程材料科技有限公司 | Alkali-free and chlorine-free concrete admixture activity activator |
| CN104291726B (en) * | 2013-07-19 | 2016-06-29 | 北京纽维逊建筑工程技术有限公司 | Ultralow volume post-tensioned prestressing pipeline pneumatic mortar agent, its preparation method and application thereof |
| CN103396057B (en) * | 2013-07-26 | 2015-05-20 | 太原理工大学 | Prestressed pore pressure slurry and grouting method thereof |
| CN103435301B (en) * | 2013-08-16 | 2015-12-09 | 武汉格瑞林建材科技股份有限公司 | A kind of upper flow regime microdilatancy back-tension prestressed channel mudjacking agent and preparation method |
| CN104788045A (en) * | 2014-01-18 | 2015-07-22 | 上海标仕新型建筑材料厂 | Grouting material |
| CN104693376B (en) * | 2015-02-04 | 2017-04-19 | 鞍钢矿山建设有限公司 | Method for preparing poly carboxylic acid water reducer stock solution containing 40% solid |
| CN105967591B (en) * | 2016-05-05 | 2018-12-07 | 武汉华中科大土木工程检测中心 | A kind of high fluidity is suitble to the grouting material and preparation method thereof in super-length prestressed duct |
| CN106830825A (en) * | 2017-01-21 | 2017-06-13 | 湖南建工交通建设有限公司 | Sealing off and covering anchorage material for post-tensioned prestressing anchor head and preparation method thereof |
| CN108164227B (en) * | 2017-12-22 | 2020-11-17 | 江苏苏博特新材料股份有限公司 | Easy-to-shape cement-based joint sealing material for mounting assembly type component and construction method thereof |
| CN108275908A (en) * | 2018-02-05 | 2018-07-13 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of low grade high flowability concrete plasticity micro-crack defect inhibitor and preparation method thereof |
| CN112592097A (en) * | 2021-01-26 | 2021-04-02 | 江西省建筑材料工业科学研究设计院 | Copper tailing powder post-tensioned pre-stressed pipeline grouting agent |
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