CN107902940A - A kind of prestress pipe swelling agent and its production method - Google Patents
A kind of prestress pipe swelling agent and its production method Download PDFInfo
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- CN107902940A CN107902940A CN201711208292.8A CN201711208292A CN107902940A CN 107902940 A CN107902940 A CN 107902940A CN 201711208292 A CN201711208292 A CN 201711208292A CN 107902940 A CN107902940 A CN 107902940A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of prestress pipe swelling agent, the prestress pipe swelling agent include the raw material of following parts by weight：Expand masterbatch：60~90；Active mineral admixture：10~40；Retrospective swelling agent：0.5~2.5；Lignins water-reducing agent：2~8；Expansion masterbatch includes the raw material of following parts by weight：Gypsum tailings：35~55；Portland cement clinker：20~40；Building waste：10~40.Product of the present invention has plastic expansion and hardening period expansion double effect, adequately compensates for concrete shrinkage, low with volume, and has the concrete admixture of the complex functions such as expansion, diminishing, cracking resistance concurrently.
Description
Technical field
The present invention relates to the technical field of slurry, and more particularly to one kind, for current cement-based grouting material, there are slurry
Shrink after hardening, problems of crack, using materials such as building waste, gypsum mud, the one kind designed through rational formula in advance should
Hydraulic piping swelling agent.
Background technology
Cement expansive material is a kind of concrete admixture to grow up on the basis of expanding cement, 1936, H.
Lossier has invented expanding cement, and 1958, Klien developed K-type expanding cement, formal input in 1964 on this basis
Production.Japan be at first develop swelling agent country, from 1962 to 1970, it successfully have developed sulphoaluminate expander and
Lime swelling agent.In addition, Russia, the U.S., Australia, Bulgaria etc. have carried out the development of cement expansive material.I
State carries out the research of cement expansive material from the 1970s, substantially experienced that " it is low to mix one in alkali in high-alkali highly doped one so far
Alkali low-mix " three phases.
The material that early stage is used for Equipment Foundations grouting is common building mortar and pea gravel concreten, but such material is hard
There are certain contraction before and after changing, including sedimentation is shunk, chemical shrinkage and drying are shunk, and is easy to cause filling leakiness, from
And the transmission of load is influenced, precision of equipment installation and service life are greatly affected.Since last century the eighties, China from
Foreign countries have introduced substantial amounts of machinery equipment, and equipment supplier is in order to ensure precision of equipment installation and service life, and regulation is used mostly
Microdilatancy, high intensity, grouting material perfusion foundation bolt, the equipment base of good fluidity.The more common building sand of these grouting materials
Slurry and pea gravel concreten have larger progress, it mixes common swelling agent in cement mortar, and the contraction after compensation grouting, makes
Grouted density is improved.But since common swelling agent only works in the hardening of cement phase, its expansion rate is very low.And
As a kind of self-leveling material, grouting material early stage, there are larger sedimentation contraction, sedimentation to shrink can account for entirely shrinking 85%
More than, therefore the inadequate risk of filling compactness is still suffered from, bring hidden danger to equipment operation.
With increasing for China's infrastructure, cement-based grouting material has been commonly used to metallurgy, oil, chemical industry, electric power, has made
The industries such as the reinforcing of paper, building and ground.At present, the quality of China's grouting material is very different, very disruptive market.Cause
This, the Ministry of Construction also is setting about working out new application technology specification, with the overall quality for improving China's cement-based grouting material, it is ensured that
Safety in production.《Cement-based grouting material application technology specification》In clearly propose that cement-based grouting material must have in 1-3h
The vertical expansion ratio of 0.1%-3.5%.In 1-3h, general grouting material is all in the plastic stage, also without final set, therefore, often
Rule aluminate class, oxide-based swelling agent cannot all produce expansion.Metal dust class, reaction speed is fast, and gas forming amount is big, and stomata is big
It is not suitable for use in the plastic stage expansion sources of grouting material.
Traditional grouting agent used in phase prestressed pore passage grouting is generally neat slurry, during construction, using cement, water,
Water-reducing agent, swelling agent etc. carry out extemporaneous preparation.The grouting material of extemporaneous preparation must is fulfilled for：The ratio of mud is 0.40~0.45, incorporation
Appropriate water-reducing agent, can be reduced to 0.35 the ratio of mud is minimum；Grouting material maximum bleeding rate must not exceed 3%, and bleeding should be in 24h
Inside absorbed again by mortar；The viscosity of grouting material should be controlled in 14-18s, because the viscosity of polymer mortar does not have mud jacking
The height of material, grouting material must possess certain expansion before solidification；The compression strength of grouting material test block is not less than 50MPa.
At this stage, using cement, water-reducing agent, swelling agent, mineral admixture etc. and water in prestress pipe construction site
Grouting material is prepared, usually there are various additive compatibility are bad, cement and the problems such as water-reducing agent bad adaptability, causes duct to fill
There are following serious problems for slurry：
（1）Grouting agent slurry quality stability is poor, poor fluidity, flow losses are fast, and volume stability is bad；
（2）Fresh paste bleeding rate is big, and easily micro- foam is more in isolation layering, slurry, and mobility is bad, and setting time is not moderate, slurry
Often have some setbacks during body mud jacking, easy plugging, speed of application is slow, is difficult to form full state in duct；
（3）Slurry leakiness after hardening, bubble, needle gap class gap are more, unreal with presstressed reinforcing steel bonding, even have in slurry disconnected
Line, duct is not full, and the outer slurry of high point plays powder etc..
Therefore, it is necessary to develop a kind of not only in plastic stage but also the height after final set still with certain micro-expansibility energy
Performance prestress pipe expansion agent, and for that can have plasticising performance well after cement mortar and protect plasticity energy,
It is very necessary.
The content of the invention
Above-mentioned to solve the problems, such as, the object of the present invention is to provide a kind of prestress pipe swelling agent and its producer
Method, shrinks, problems of crack after being hardened for current cement-based grouting material there are slurry, utilizes building waste, gypsum mud etc.
Material, a kind of prestress pipe swelling agent designed through rational formula.
The technical solution adopted in the present invention is：
A kind of prestress pipe swelling agent, the prestress pipe swelling agent include the raw material of following parts by weight：
Expand masterbatch：100~120；
Active mineral admixture：6~8；
Retrospective swelling agent：3~5；
Lignins water-reducing agent：2~8；
Expansion masterbatch includes the raw material of following parts by weight：
Gypsum tailings：65~75；
Portland cement clinker：50~60；
Building waste：52~58.
Gypsum tailings selects the slag mud after mirabilite ore ore dressing, its chemical composition：LOSS13.28%, SiO233.43%,
Fe2O33.23%, Al2O39.63%, CaO12.75, MgO7.34, SO320.09%。
Portland cement clinker be with calcium carbonate, granulated blast-furnace slag, kaolinite and gypsum according to weight proportion be 4:2:2:1,
After 1300 ~ 1350 DEG C of calcinings, then percentage by weight is filled as made by 5-8% marbles and 5-8% granite intergrindings
Clinker.
Building waste is mixed to get for engineering dregs, one kind of brick and tile fragment and concrete block or composition with lime stone
Material.
Active mineral admixture includes the raw material of following parts by weight：Granulated blast-furnace slag 20~40, anhydrite 2~10,
Triethanolamine phosphate 0.3~0.5；Its preparation method：Granulated blast-furnace slag is crushed to 0.5-5mm, obtains fines；By fines
It is uniformly mixed with anhydrite, obtains mixture；Grinding is carried out after adding triethanolamine phosphate in mixture, to specific surface area
>=450 ㎡/kg, obtain the active mineral admixture.
Retrospective swelling agent is that material is wanted based on red bauxite mineral in a nitrogen atmosphere, in condition existing for charcoal and calcium oxide
Under, after 1700 degree of high temperature sinterings, powder that product surface treated is levigate to be formed.
Lignins water-reducing agent includes the raw material of following parts by weight：15~20 parts of methylpropene sodium sulfonate, polyacrylamide 5
~8 parts, 5~10 parts of sodium hydroxide, 5~10 parts of calcium lignosulfonate, 8~10 parts of molasses, 0.5-2 parts of p-methyl benzenesulfonic acid, water 30-
60 parts；Preparation method is that above-mentioned raw materials are heated to 20 DEG C~50 DEG C, is stirred evenly, and 3~5 minutes to obtain the final product.
The prestress pipe swelling agent, its production method comprise the following steps：
A. building waste send to tower drier through belt conveyor and is dried, after drying the boosted machine of building waste send to
Building waste storage is deposited, and water content is less than 5%；
B. it is broken in advance by all block raw material, including clinker, gypsum tailings and building waste；
C. the starting material with water mud grinding machine grinding after step b is crushed, the percent of pass for being passed to 100 mesh sieves reach more than 95%,
Obtain expansion masterbatch；
D. it is the obtained expansion masterbatch of step c and ready active mineral admixture, Lignins water-reducing agent and plasticity is swollen
Swollen dose is added in mixing grinding machine in parts by weight, to the internal spray atomized water of mixing grinding machine, makes the temperature control of milling process
System is at 90~120 DEG C, material, that is, prestress pipe swelling agent semi-finished product at mixing grinding machine grinding head out；
E. prestress pipe swelling agent semi-finished product are conveyed into finished product homogenizing bin with elevator, are produced by homogenizing bin bottom
Air homogenizing after obtain prestress pipe swelling agent finished product.
The application method of prestress pipe swelling agent of the present invention is：It is in the milk according to the volume of weight ratio 3%~7% with synthesis
Material.
Beneficial effects of the present invention：
1st, product of the present invention has the function of plastic expansion before hardening, solves the closely knit, full of grouting material；
2nd, product of the present invention has plastic expansion and hardening period expansion double effect, adequately compensates for concrete shrinkage, has volume
It is low, and have the concrete admixture of the complex functions such as expansion, diminishing, cracking resistance concurrently；
3rd, fresh paste bleeding rate is small, and toughness is high, and slurry is strong to the parcel of aggregate and the effect of support, greatly reduces coarse aggregate
The generation of sinkage, makes fresh concrete keep good homogeneity in work progress, and mechanical property is balanced after hardening；
4th, product of the present invention makes full use of the slag mud after building waste and mirabilite ore ore dressing, low cost, environmental protection and energy saving；
5th, construction usage is easy to operate, easily controllable quality.
Embodiment
Embodiment 1
A kind of prestress pipe swelling agent, the prestress pipe swelling agent include the raw material of following parts by weight：
Expand masterbatch：100；
Active mineral admixture：6；
Retrospective swelling agent：3；
Lignins water-reducing agent：2；
Expansion masterbatch includes the raw material of following parts by weight：
Gypsum tailings：65；
Portland cement clinker：50；
Building waste：52.
Gypsum tailings selects the slag mud after mirabilite ore ore dressing, its chemical composition：LOSS13.28%, SiO233.43%,
Fe2O33.23%, Al2O39.63%, CaO12.75, MgO7.34, SO320.09%。
Portland cement clinker be with calcium carbonate, granulated blast-furnace slag, kaolinite and gypsum according to weight proportion be 4:2:2:1,
After 1300 ~ 1350 DEG C of calcinings, then percentage by weight is filled as made by 5-8% marbles and 5-8% granite intergrindings
Clinker.
Building waste is mixed to get for engineering dregs, one kind of brick and tile fragment and concrete block or composition with lime stone
Material.
Active mineral admixture includes the raw material of following parts by weight：Granulated blast-furnace slag 20, anhydrite 2, triethanolamine
Phosphate 0.3；Its preparation method：Granulated blast-furnace slag is crushed to 0.5-5mm, obtains fines；Fines is mixed with anhydrite
Uniformly, mixture is obtained；Grinding is carried out after adding triethanolamine phosphate in mixture, to specific surface area >=450 ㎡/kg,
Obtain the active mineral admixture.
Retrospective swelling agent is that material is wanted based on red bauxite mineral in a nitrogen atmosphere, in condition existing for charcoal and calcium oxide
Under, after 1700 degree of high temperature sinterings, powder that product surface treated is levigate to be formed.
Lignins water-reducing agent includes the raw material of following parts by weight：15~20 parts of methylpropene sodium sulfonate, polyacrylamide 5
~8 parts, 5~10 parts of sodium hydroxide, 5~10 parts of calcium lignosulfonate, 8~10 parts of molasses, 0.5-2 parts of p-methyl benzenesulfonic acid, water 30-
60 parts；Preparation method is that above-mentioned raw materials are heated to 20 DEG C~50 DEG C, is stirred evenly, and 3~5 minutes to obtain the final product.
The prestress pipe swelling agent, its production method comprise the following steps：
A. building waste send to tower drier through belt conveyor and is dried, after drying the boosted machine of building waste send to
Building waste storage is deposited, water content 4%；
B. it is broken in advance by all block raw material, including clinker, gypsum tailings and building waste；
C. the starting material with water mud grinding machine grinding after step b is crushed, the percent of pass for being passed to 100 mesh sieves reach more than 95%,
Obtain expansion masterbatch；
D. it is the obtained expansion masterbatch of step c and ready active mineral admixture, Lignins water-reducing agent and plasticity is swollen
Swollen dose is added in mixing grinding machine in parts by weight, to the internal spray atomized water of mixing grinding machine, makes the temperature control of milling process
System is at 90~120 DEG C, material, that is, prestress pipe swelling agent semi-finished product at mixing grinding machine grinding head out；
E. prestress pipe swelling agent semi-finished product are conveyed into finished product homogenizing bin with elevator, are produced by homogenizing bin bottom
Air homogenizing after obtain prestress pipe swelling agent finished product.
The application method of prestress pipe swelling agent of the present invention is：According to the volume of weight ratio 3% with synthesis grouting material.
Inspection data is as follows：
Table 1
Embodiment 2
A kind of prestress pipe swelling agent, the prestress pipe swelling agent include the raw material of following parts by weight：
Expand masterbatch：110；
Active mineral admixture：7；
Retrospective swelling agent：4；
Lignins water-reducing agent：5；
Expansion masterbatch includes the raw material of following parts by weight：
Gypsum tailings：70；
Portland cement clinker：55；
Building waste：55.
Gypsum tailings selects the slag mud after mirabilite ore ore dressing, its chemical composition：LOSS13.28%, SiO233.43%,
Fe2O33.23%, Al2O39.63%, CaO12.75, MgO7.34, SO320.09%。
Portland cement clinker be with calcium carbonate, granulated blast-furnace slag, kaolinite and gypsum according to weight proportion be 4:2:2:1,
After 1300 ~ 1350 DEG C of calcinings, then percentage by weight is filled as made by 5-8% marbles and 5-8% granite intergrindings
Clinker.
Building waste is mixed to get for engineering dregs, one kind of brick and tile fragment and concrete block or composition with lime stone
Material.
Active mineral admixture includes the raw material of following parts by weight：Granulated blast-furnace slag 30, anhydrite 6, triethanolamine
Phosphate 0.4；Its preparation method：Granulated blast-furnace slag is crushed to 0.5-5mm, obtains fines；Fines is mixed with anhydrite
Uniformly, mixture is obtained；Grinding is carried out after adding triethanolamine phosphate in mixture, to specific surface area >=450 ㎡/kg,
Obtain the active mineral admixture.
Retrospective swelling agent is that material is wanted based on red bauxite mineral in a nitrogen atmosphere, in condition existing for charcoal and calcium oxide
Under, after 1700 degree of high temperature sinterings, powder that product surface treated is levigate to be formed.
Lignins water-reducing agent includes the raw material of following parts by weight：15~20 parts of methylpropene sodium sulfonate, polyacrylamide 5
~8 parts, 5~10 parts of sodium hydroxide, 5~10 parts of calcium lignosulfonate, 8~10 parts of molasses, 0.5-2 parts of p-methyl benzenesulfonic acid, water 30-
60 parts；Preparation method is that above-mentioned raw materials are heated to 20 DEG C~50 DEG C, is stirred evenly, and 3~5 minutes to obtain the final product.
The prestress pipe swelling agent, its production method comprise the following steps：
A. building waste send to tower drier through belt conveyor and is dried, after drying the boosted machine of building waste send to
Building waste storage is deposited, water content 4.5%；
B. it is broken in advance by all block raw material, including clinker, gypsum tailings and building waste；
C. the starting material with water mud grinding machine grinding after step b is crushed, the percent of pass for being passed to 100 mesh sieves reach more than 95%,
Obtain expansion masterbatch；
D. it is the obtained expansion masterbatch of step c and ready active mineral admixture, Lignins water-reducing agent and plasticity is swollen
Swollen dose is added in mixing grinding machine in parts by weight, to the internal spray atomized water of mixing grinding machine, makes the temperature control of milling process
System is at 90~120 DEG C, material, that is, prestress pipe swelling agent semi-finished product at mixing grinding machine grinding head out；
E. prestress pipe swelling agent semi-finished product are conveyed into finished product homogenizing bin with elevator, are produced by homogenizing bin bottom
Air homogenizing after obtain prestress pipe swelling agent finished product.
The application method of prestress pipe swelling agent of the present invention is：According to the volume of weight ratio 5% with synthesis grouting material.
Inspection data is as follows：
Table 2
Embodiment 3
A kind of prestress pipe swelling agent, the prestress pipe swelling agent include the raw material of following parts by weight：
Expand masterbatch：120；
Active mineral admixture：8；
Retrospective swelling agent：5；
Lignins water-reducing agent：8；
Expansion masterbatch includes the raw material of following parts by weight：
Gypsum tailings：75；
Portland cement clinker：60；
Building waste：58.
Gypsum tailings selects the slag mud after mirabilite ore ore dressing, its chemical composition：LOSS13.28%, SiO233.43%,
Fe2O33.23%, Al2O39.63%, CaO12.75, MgO7.34, SO320.09%。
Portland cement clinker be with calcium carbonate, granulated blast-furnace slag, kaolinite and gypsum according to weight proportion be 4:2:2:1,
After 1300 ~ 1350 DEG C of calcinings, then percentage by weight is filled as made by 5-8% marbles and 5-8% granite intergrindings
Clinker.
Building waste is mixed to get for engineering dregs, one kind of brick and tile fragment and concrete block or composition with lime stone
Material.
Active mineral admixture includes the raw material of following parts by weight：Granulated blast-furnace slag 40, anhydrite 10, triethanolamine
Phosphate 0.5；Its preparation method：Granulated blast-furnace slag is crushed to 0.5-5mm, obtains fines；Fines is mixed with anhydrite
Uniformly, mixture is obtained；Grinding is carried out after adding triethanolamine phosphate in mixture, to specific surface area >=450 ㎡/kg,
Obtain the active mineral admixture.
Retrospective swelling agent is that material is wanted based on red bauxite mineral in a nitrogen atmosphere, in condition existing for charcoal and calcium oxide
Under, after 1700 degree of high temperature sinterings, powder that product surface treated is levigate to be formed.
The prestress pipe swelling agent, its production method comprise the following steps：
A. building waste send to tower drier through belt conveyor and is dried, after drying the boosted machine of building waste send to
Building waste storage is deposited, water content 5%；
B. it is broken in advance by all block raw material, including clinker, gypsum tailings and building waste；
C. the starting material with water mud grinding machine grinding after step b is crushed, the percent of pass for being passed to 100 mesh sieves reach more than 95%,
Obtain expansion masterbatch；
D. it is the obtained expansion masterbatch of step c and ready active mineral admixture, Lignins water-reducing agent and plasticity is swollen
Swollen dose is added in mixing grinding machine in parts by weight, to the internal spray atomized water of mixing grinding machine, makes the temperature control of milling process
System is at 90~120 DEG C, material, that is, prestress pipe swelling agent semi-finished product at mixing grinding machine grinding head out；
E. prestress pipe swelling agent semi-finished product are conveyed into finished product homogenizing bin with elevator, are produced by homogenizing bin bottom
Air homogenizing after obtain prestress pipe swelling agent finished product.
The application method of prestress pipe swelling agent of the present invention is：According to the volume of weight ratio 7% with synthesis grouting material.
Inspection data is as follows：
Table 3
Claims (8)
- A kind of 1. prestress pipe swelling agent, it is characterised in that：The prestress pipe swelling agent includes the original of following parts by weight Material：Expand masterbatch：100~120；Active mineral admixture：6~8；Retrospective swelling agent：3~5；Lignins water-reducing agent：2~8；Expansion masterbatch includes the raw material of following parts by weight：Gypsum tailings：65~75；Portland cement clinker：50~60；Building waste：52~58.
- 2. prestress pipe swelling agent according to claim 1, is further characterized in that, the gypsum tailings selects mirabilite ore Slag mud after ore dressing, its chemical composition：LOSS13.28%, SiO233.43%, Fe2O33.23%, Al2O39.63%, CaO12.75, MgO7.34, SO320.09%。
- 3. prestress pipe swelling agent according to claim 1, is further characterized in that, the portland cement clinker is to use carbon Sour calcium, granulated blast-furnace slag, kaolinite and gypsum are 4 according to weight proportion:2:2:1, after 1300 ~ 1350 DEG C of calcinings, then Percentage by weight is filled as the clinker made by 5-8% marbles and 5-8% granite intergrindings.
- 4. prestress pipe swelling agent according to claim 1, is further characterized in that, the building waste is engineering slag The material that one kind or composition of soil, brick and tile fragment and concrete block are mixed to get with lime stone.
- 5. prestress pipe swelling agent according to claim 1, is further characterized in that, the active mineral admixture bag Include the raw material of following parts by weight：Granulated blast-furnace slag 20~40, anhydrite 2~10, triethanolamine phosphate 0.3~0.5；Its Preparation method：Granulated blast-furnace slag is crushed to 0.5-5mm, obtains fines；Fines is uniformly mixed with anhydrite, is mixed Material；Grinding is carried out after adding triethanolamine phosphate in mixture, to specific surface area >=450 ㎡/kg, obtains the active ore deposit Polymer blends material.
- 6. prestress pipe swelling agent according to claim 1, is further characterized in that, the retrospective swelling agent is with iron Alumina mineral in a nitrogen atmosphere, under the conditions of existing for charcoal and calcium oxide, after 1700 degree of high temperature sinterings, obtain for raw material Product is again by being surface-treated the levigate powder formed.
- 7. prestress pipe swelling agent according to claim 1, is further characterized in that, the Lignins water-reducing agent bag Include the raw material of following parts by weight：15~20 parts of methylpropene sodium sulfonate, 5~8 parts of polyacrylamide, 5~10 parts of sodium hydroxide, wood 5~10 parts of quality sulfoacid calcium, 8~10 parts of molasses, 0.5-2 parts of p-methyl benzenesulfonic acid, 30-60 parts of water；Preparation method is by above-mentioned original Material is heated to 20 DEG C~50 DEG C, stirs evenly, 3~5 minutes to obtain the final product.
- 8. prestress pipe swelling agent according to claim 1, it is characterised in that its production method comprises the following steps：A. building waste send to tower drier through belt conveyor and is dried, after drying the boosted machine of building waste send to Building waste storage is deposited, and water content is less than 5%；B. it is broken in advance by all block raw material, including clinker, gypsum tailings and building waste；C. the starting material with water mud grinding machine grinding after step b is crushed, the percent of pass for being passed to 100 mesh sieves reach more than 95%, Obtain expansion masterbatch；D. it is the obtained expansion masterbatch of step c and ready active mineral admixture, Lignins water-reducing agent and plasticity is swollen Swollen dose is added in mixing grinding machine in parts by weight, to the internal spray atomized water of mixing grinding machine, makes the temperature control of milling process System is at 90~120 DEG C, material, that is, prestress pipe swelling agent semi-finished product at mixing grinding machine grinding head out；E. prestress pipe swelling agent semi-finished product are conveyed into finished product homogenizing bin with elevator, are produced by homogenizing bin bottom Air homogenizing after obtain prestress pipe swelling agent finished product.
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| CN102092982A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Concrete pipeline mud-jacking agent and preparation method |
| CN103030321A (en) * | 2012-12-26 | 2013-04-10 | 交通运输部公路科学研究所 | Expanding agent, post-tensioning prestressed concrete porelike grouting agent and grouting material |
| CN103224342A (en) * | 2013-04-22 | 2013-07-31 | 交通运输部公路科学研究所 | Restoration material of pavement cement concrete slab bottom |
| JP5295722B2 (en) * | 2008-11-06 | 2013-09-18 | 花王株式会社 | Concrete production method |
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2017
- 2017-11-27 CN CN201711208292.8A patent/CN107902940A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5295722B2 (en) * | 2008-11-06 | 2013-09-18 | 花王株式会社 | Concrete production method |
| CN102092982A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Concrete pipeline mud-jacking agent and preparation method |
| CN103030321A (en) * | 2012-12-26 | 2013-04-10 | 交通运输部公路科学研究所 | Expanding agent, post-tensioning prestressed concrete porelike grouting agent and grouting material |
| CN103224342A (en) * | 2013-04-22 | 2013-07-31 | 交通运输部公路科学研究所 | Restoration material of pavement cement concrete slab bottom |
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Application publication date: 20180413 |