CN101244909A - Highly durable high slump loss resistant no-bleeding concrete pump delivering agent - Google Patents
Highly durable high slump loss resistant no-bleeding concrete pump delivering agent Download PDFInfo
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- CN101244909A CN101244909A CNA2008100308873A CN200810030887A CN101244909A CN 101244909 A CN101244909 A CN 101244909A CN A2008100308873 A CNA2008100308873 A CN A2008100308873A CN 200810030887 A CN200810030887 A CN 200810030887A CN 101244909 A CN101244909 A CN 101244909A
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- concrete
- bleeding
- percent
- water
- highly durable
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Classifications
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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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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0082—Segregation-preventing agents; Sedimentation-preventing agents
- C04B2103/0083—Bleeding-preventing agents
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/308—Slump-loss preventing agents
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
Abstract
The invention relates to a non-bleeding concrete pumping admixture with high durability and high slump retaining, the raw material weight percentage composition of which is: 25 to 45 percent of naphthalene series water reducer, 2 to 6 percent of polycarboxylic series of water reducer, 1 to 4 percent of sodium lignosulfonate, 0.5 to 2 percent of sodium gluconate, 0.2 to 2 percent of triterpenoid saponin, 0.5 to 3 percent of carboxymethyl cellulose, 0.2 to 1 percent of silicon oil, and 40 to 65 percent of water; the non-bleeding concrete pumping aid with high durability and high slump retaining has the advantages of low slump loss and low cost, no bleeding, restraining the shrinkage of concrete, and controlling the fissure of concrete.
Description
Technical field
The present invention relates to material of construction, is that a kind of highly durable high slump loss resistant no-bleeding concrete pump send agent.
Background technology
Concrete is a kind of solid, liquid, gas three-phase and deposits, anisotropic heterogeneous body matrix material, and these character have determined that it is that the very high hard brittle material of probability takes place in a kind of crack.High performance concrete has that good workability, intensity height, volume stability are good, most important characteristic is the control concrete shrinkage, has high-durability, can reach 100 years-500 years, be normal concrete 3-10 doubly.Concrete high-durability and long lifetime at first are security and the reliabilities that guarantees structure, but from another point of view, also are fundamentally to economize on resources and the energy, reduce the key subjects of polluting.For example, the existing average cost of skeleton construction dwelling house is 2000 yuan/m
2, every m
2Need material 1500kg (concrete 1000kg/m wherein
2), if annual 700000000 m that build in the whole nation
2Dwelling house, just need 14,000 hundred million yuan of funds, need concrete material 700,000,000 t/a.If can extend to 75 years to the work-ing life of existing dwelling house from 50 years, annual hundred million yuan of 1/3 the construction funds (about 3800) of just can saving, economical with materials 2.3 hundred million t, the while can be reduced the environmental pollution that manufacture of cement and building waste cause greatly.We can say that the high-durability of concrete structure and long lifetime are the key subjects of concrete material and technical development.Concrete is a kind of rostone, should have the weather resistance that is similar to lithotome.But test and application proof, concrete and Steel Concrete are in use, be subjected in the soil, the erosion of hazardous medium in the water and in the air, or the chemistry and the physical action of the composition material objectionable constituent of concrete own, can produce deterioration, cracking, corrosion occur, peel off, degradation under the expansion, soft and strength retraction, severe patient can make structure deteriorate collapse.
At present, during the concrete of some engineerings was used, the problem of existence has: cement consumption was big, and cement components is single; Concrete shrinkage is big, influences endurance performance of concrete; Concrete slump loss is big, influences pump-conveying property.
Concrete admixture is one of staple product of building material industry; Wherein, high efficiency water reducing agent has not only improved mechanical properties of concrete greatly, and has improved construction technology.The widely used high efficiency water reducing agent of China mainly is that naphthalene is a product at present.Naphthalene series high-efficiency water-reducing agent is to the progress of China's concrete technology and concrete construction technology, to the quality and work-ing life of improving buildings, cut down the consumption of energy, save cement and reduce aspects such as environmental pollution and all play an important role.
According to the observation, naphthalene system, though aromatic sulfonated polymer water reducers such as trimeric cyanamide system have suitability preferably to new sand cutting slurry or concrete, but the slump through the time change greatly, general by composite retardant, changing water reducer addition means (latter admixing method or repeatedly latter admixing method) and sustained release method (carrier absorption and surface modification) realizes, but certain operations and technical difficulty often appear, cause the concrete quality instability, in addition, owing to be subjected to the molecular structure restriction, the damage of collapsing problem is difficult to fundamentally solve, and water-reducing rate can not improve a lot, the bleeding rate height.The widely used efficient pumping agent of China mainly is that naphthalene is a product at present, has also exposed some problems that self are difficult to overcome in the development of nearly decades.For example, concrete slump loss influence with its preparation is fairly obvious, higher water-reducing rate can not be arranged, the concrete water-reducing rate is the highest can only to reach 20%, the alkali content height, the chloride ion content height, and also this class condensation polymer type water reducer adopts the oleum of formaldehyde and severe corrosive or the vitriol oil to be prepared from mostly, unavoidably environment is polluted, be unfavorable for Sustainable development.The main raw material of its production---naphthalene is the byproduct of coking industry, and the source is subjected to restriction of Iron And Steel Industry or the like.So people have turned to sight polyalcohol water reducing agents such as carboxylic-acid polymkeric substance.Polycarboxylic acid high efficiency water reducing agent polycarboxylic acids dehydragent is compared with other high efficiency water reducing agents, the dispersing property that low-dosage (0.2%～0.5%) just can be bringd into play; But there are adaptability problem in poly carboxylic acid series water reducer and cement, are difficult to satisfy engineering to its performance requirement, and production cost is higher again, are therefore generally used as yet in engineering.
According to another investigating, pumping agent in the market can not suppress concrete shrinkage, can not control distress in concrete, increase concrete shrinkage on the contrary, cause commerical ready-mixed concrete crack phenomenon ubiquity, cracking, corrosion occur, peel off, degradation phenomenon under the expansion, soft and strength retraction, shorten the buildings life-span, influence concrete weather resistance, a large amount of construction funds of waste country.
Summary of the invention
The technical problem to be solved in the present invention is, defective at the prior art existence, propose a kind of highly durable high slump loss resistant no-bleeding concrete pump and send agent, it has low slump loss and suppresses concrete shrinkage, control distress in concrete, lower-cost characteristics, can be engineering quick, reliable, the economic approach that provides is provided.
Technical scheme of the present invention is that described highly durable high slump loss resistant no-bleeding concrete pump send the raw material weight per-cent of agent to consist of:
Naphthalene water reducer 25%-45%,
Polycarboxylate water-reducer 2%-6%,
Sodium lignosulfonate 1%-4%,
Sunmorl N 60S 0.5%-2%,
Triterpenoid saponin 0.2%-2%,
Carboxymethyl cellulose 0.5%-3%,
Silicone oil 0.2%-1%,
Water 40%-65%.
Get above-mentioned each component by described weight percent, promptly with its uniform mixing.
Below the present invention made further specify.
Among the present invention, described naphthalene water reducer can be a beta-naphthalenesulfonic-acid methylene radical condenses; Air entrapment agent is a triterpenoid saponin; Described silicone oil can be methyl silicon sodium alcoholate, and it can make concrete shrinkage little, can prevent the ready mixed concrete crackle.
The present invention suppresses concrete shrinkage for reaching low slump loss, and control distress in concrete, and the purpose of lower cost by deep theoretical investigation and a large amount of repetition tests, optimize the raw and auxiliary material that the molecular structure degree of freedom is big, controllable parameter is many; Utilize the effect of different groups or molecule to make the water reducer multifunction; Reduce etc. polynary compoundly by the bleed thickening, the component carboxymethyl cellulose that compound use water-retentivity is good reduces bleeding, sedimentation, and increased viscosity is improved mixture stability; Compound use silicone oil is methyl silicon sodium alcoholate, makes to shrink can prevent the ready mixed concrete crackle for a short time; Use triterpenoid saponin to do air entrapment agent, can produce a large amount of small bubbles, absorption free water, and block pore, controlled bleeding and sedimentation effectively.Utilize the effect of different groups or molecule to make product of the present invention effectively change performance, its water-reducing rate, bleeding rate, ultimate compression strength when performance index such as shrinkage ratio all to be better than polycarboxylic acid series and naphthalene system etc. respectively be pumping agent.The products production investment is little, and production cost is than polycarboxylic acid series pumping water reducer low 20%.
As known from the above, the present invention send agent for a kind of highly durable high slump loss resistant no-bleeding concrete pump, its technological merit has: can effectively change polycarboxylic acid series and naphthalene is the performance of diminishing pumping agent, its water-reducing rate, bleeding rate, ultimate compression strength when performance index such as shrinkage ratio all to be better than respectively be the diminishing pumping agent; The concrete water-reducing rate reaches more than 36%; High guarantor collapsed, and 2 hours slumps of concrete are not lost substantially, and are acted upon by temperature changes hardly; Concrete 90d ultimate compression strength improves 40～50%; Anti-bleeding, education resistance can good, no air pockets, aberration is little, Surface Quality of Concrete good; Freeze-thaw-ability and anti-carbonization ability improve 50% than naphthalene water reducer; Concrete 28d shrinking percentage reduces more than 20% than the polycarboxylic acid high efficiency water reducing agent; Clean environment firendly is energy-conservation: product is nontoxic, pollution-free, and nonirritant, "dead" does not contain formaldehyde, and alkali content is low, and chloride ion-containing not is to the reinforcing bar non-corrosiveness; Product performance are stable: the product homogeneity is good, and is not stratified, do not precipitate, and do not have crystallization winter; Product is strong than naphthalene system, polycarboxylic acid adaptability, is adapted to the cement of plurality of specifications, model, especially suits and preparation high-durability concretes such as high-quality fly ash, slag isoreactivity adulterant.
Embodiment
Embodiment 1: described highly durable high slump loss resistant no-bleeding concrete pump send the raw material weight per-cent of agent to consist of: naphthalene water reducer (beta-naphthalenesulfonic-acid methylene radical condenses) 40%, polycarboxylate water-reducer 4%, sodium lignosulfonate 2%, Sunmorl N 60S 1%, triterpenoid saponin 0.5%, carboxymethyl cellulose 1%, silicone oil (methyl silicon sodium alcoholate) 0.5%, water 51%; Behind each component uniform mixing, be that cement consumption 0.4% (weight ratio) adds in the cement concrete by volume, concrete performance detects as follows:
The result that table 1 detects with standard cement
1. water-reducing rate is 37%, can control concrete water-cement ratio and flowability (slump and divergence); The concrete good water-retaining property, not bleeding, do not emanate, keep good mobility, cohesiveness.The 1d concrete crushing strength can improve 80%, and 28d intensity can improve 79%;
2.120min the essentially no loss of the inner concrete slump is not subjected to influence of temperature change; Slump-loss is little of satisfying pumpable requirement.Because the loss of concrete slump prolongation in time must be little, and concrete bleeding also will lack, or bleeding does not keep the long period, promptly keeps concrete even matter, plasticizing and water conservation protect plasticity energy in the engineering time, could grow at the construction field (site) apart from the lift pumping; And can under different temperature conditions, keep good plasticizing capacity;
3. energy slow setting and morning, the presetting period prolonged 8h, has improved early age strength of concrete 85% by force, and outstanding reinforced effects is remarkable, and later strength keeps slow growth;
4. the adaptation of product is strong: with cement adaptability is preferably arranged, with mixed material compatibilities such as swelling agent, flyash, function is replenished mutually, has improved concrete performance.
Embodiment 2: described highly durable high slump loss resistant no-bleeding concrete pump send the raw material weight per-cent of agent to consist of: naphthalene water reducer (beta-naphthalenesulfonic-acid methylene radical condenses) 38%, polycarboxylate water-reducer 3.5%, sodium lignosulfonate 1.9%, Sunmorl N 60S 1.2%, triterpenoid saponin 0.6%, carboxymethyl cellulose 1.2%, silicone oil (methyl silicon sodium alcoholate) 0.6%, water 53%.
Behind each component uniform mixing, be that cement consumption 0.4% (weight ratio) adds in the cement concrete by volume, concrete performance is: water-reducing rate is 36%, and the 1d concrete crushing strength can improve 75%, and 28d intensity can improve 70%. The essentially no loss of the 120min inner concrete slump is not subjected to influence of temperature change; Presetting period prolongs 10h, has improved early age strength of concrete 80%.Product and cement have adaptability preferably, and with mixed material compatibilities such as swelling agent, flyash, function is replenished mutually, has improved concrete performance.
Embodiment 3: described highly durable high slump loss resistant no-bleeding concrete pump send the raw material weight per-cent of agent to consist of: naphthalene water reducer (beta-naphthalenesulfonic-acid methylene radical condenses) 40%, polycarboxylate water-reducer 4%, sodium lignosulfonate 2%, Sunmorl N 60S 0.8%, triterpenoid saponin 0.5%, carboxymethyl cellulose 0.9%, silicone oil (methyl silicon sodium alcoholate) 0.4%, water 51.4%.
Behind each component uniform mixing, be that cement consumption 0.4% (weight ratio) adds in the cement concrete by volume, concrete performance is: water-reducing rate is 36%, and the 1d concrete crushing strength can improve 76%, and 28d intensity can improve 78%; The essentially no loss of the 120min inner concrete slump is not subjected to influence of temperature change; Presetting period prolongs 7h, has improved early age strength of concrete 81%.Product and cement have adaptability preferably, and with mixed material compatibilities such as swelling agent, flyash, function is replenished mutually, has improved concrete performance.
Claims (3)
1, a kind of highly durable high slump loss resistant no-bleeding concrete pump send agent, it is characterized in that, its raw material weight per-cent consists of:
Naphthalene water reducer 25%-45%,
Polycarboxylate water-reducer 2%-6%,
Sodium lignosulfonate 1%-4%,
Sunmorl N 60S 0.5%-2%,
Triterpenoid saponin 0.2%-2%,
Carboxymethyl cellulose 0.5%-3%,
Silicone oil 0.2%-1%,
Water 40%-65%.
2, send agent according to the described highly durable high slump loss resistant no-bleeding concrete pump of claim 1, it is characterized in that, described naphthalene water reducer is a beta-naphthalenesulfonic-acid methylene radical condenses.
3, send agent according to the described a kind of highly durable high slump loss resistant no-bleeding concrete pump of claim 1, it is characterized in that, described silicone oil is methyl silicon sodium alcoholate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810030887A CN100591638C (en) | 2008-03-24 | 2008-03-24 | Highly durable high slump loss resistant no-bleeding concrete pump delivering agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810030887A CN100591638C (en) | 2008-03-24 | 2008-03-24 | Highly durable high slump loss resistant no-bleeding concrete pump delivering agent |
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| Publication Number | Publication Date |
|---|---|
| CN101244909A true CN101244909A (en) | 2008-08-20 |
| CN100591638C CN100591638C (en) | 2010-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810030887A Expired - Fee Related CN100591638C (en) | 2008-03-24 | 2008-03-24 | Highly durable high slump loss resistant no-bleeding concrete pump delivering agent |
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Cited By (32)
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|---|---|---|---|---|
| CN101746987A (en) * | 2008-12-13 | 2010-06-23 | 深圳市海川实业股份有限公司 | Dry powder mortar aid and application thereof in mortar |
| CN102060463A (en) * | 2010-12-03 | 2011-05-18 | 山东宏艺科技股份有限公司 | Low-cost concrete antifreezing pumping aid and preparation method thereof |
| CN102101762A (en) * | 2010-12-29 | 2011-06-22 | 山东宏艺科技股份有限公司 | Exposed concrete pumping agent and preparation method thereof |
| CN102101761A (en) * | 2010-12-17 | 2011-06-22 | 上海华联建筑外加剂厂有限公司 | High-water-reduction, low-bleeding, micro-contraction and high-strength pumping aid |
| CN102531453A (en) * | 2012-03-09 | 2012-07-04 | 天津世纪天源安全卫生评价监测有限公司 | Pumping agent for concrete |
| CN102557517A (en) * | 2012-01-12 | 2012-07-11 | 四川路加四通科技发展有限公司 | High-efficiency admixture of subway shield segments, preparation method and use method thereof |
| CN102674748A (en) * | 2012-06-06 | 2012-09-19 | 同济大学 | Concrete modifier and using method thereof |
| CN102992697A (en) * | 2012-12-18 | 2013-03-27 | 苏州市澄湖混凝土有限公司 | Slump-prevention-type concrete pumping aid |
| CN103172298A (en) * | 2011-12-21 | 2013-06-26 | 同济大学 | Efficient water reducing agent for recycled aggregate concrete as well as preparation method and application thereof |
| CN103265224A (en) * | 2013-05-29 | 2013-08-28 | 上海华联建筑外加剂厂有限公司 | Polycarboxylate series low-concentration slump retaining intermediate-acting pumping agent |
| CN103524069A (en) * | 2013-09-26 | 2014-01-22 | 中国十九冶集团有限公司 | Concrete pumping agent as well as preparation method and application thereof |
| CN103641358A (en) * | 2013-11-05 | 2014-03-19 | 上海市建筑构件制品有限公司 | A polycarboxylate-type intermediate-efficiency pumping aid used for premix commodity pump concrete |
| CN104098289A (en) * | 2014-07-22 | 2014-10-15 | 同济大学 | Slump retaining type concrete pumping aid doped with CLT (6-chloro-3- toluidine-4-sulfoacid) waste liquid |
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| CN101746987A (en) * | 2008-12-13 | 2010-06-23 | 深圳市海川实业股份有限公司 | Dry powder mortar aid and application thereof in mortar |
| CN101746987B (en) * | 2008-12-13 | 2013-08-14 | 深圳市海川实业股份有限公司 | Dry powder mortar aid and application thereof in mortar |
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| CN102060463B (en) * | 2010-12-03 | 2012-07-25 | 山东宏艺科技股份有限公司 | Low-cost concrete antifreezing pumping aid and preparation method thereof |
| CN102101761A (en) * | 2010-12-17 | 2011-06-22 | 上海华联建筑外加剂厂有限公司 | High-water-reduction, low-bleeding, micro-contraction and high-strength pumping aid |
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| CN102557517A (en) * | 2012-01-12 | 2012-07-11 | 四川路加四通科技发展有限公司 | High-efficiency admixture of subway shield segments, preparation method and use method thereof |
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| CN102531453B (en) * | 2012-03-09 | 2013-02-27 | 天津世纪天源安全卫生评价监测有限公司 | Pumping agent for concrete |
| CN102674748A (en) * | 2012-06-06 | 2012-09-19 | 同济大学 | Concrete modifier and using method thereof |
| CN102992697A (en) * | 2012-12-18 | 2013-03-27 | 苏州市澄湖混凝土有限公司 | Slump-prevention-type concrete pumping aid |
| CN102992697B (en) * | 2012-12-18 | 2015-01-07 | 苏州市澄湖混凝土有限公司 | Slump-prevention-type concrete pumping aid |
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