CN101555108A - Ultra-early-strength high-strength composite additive and preparation method thereof - Google Patents
Ultra-early-strength high-strength composite additive and preparation method thereof Download PDFInfo
- Publication number
- CN101555108A CN101555108A CNA2009103025743A CN200910302574A CN101555108A CN 101555108 A CN101555108 A CN 101555108A CN A2009103025743 A CNA2009103025743 A CN A2009103025743A CN 200910302574 A CN200910302574 A CN 200910302574A CN 101555108 A CN101555108 A CN 101555108A
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- strength
- concrete
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- early
- strong
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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
-
- 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
- C04B2103/10—Accelerators; Activators
- C04B2103/14—Hardening accelerators
Abstract
The invention discloses an ultra-early-strength high-strength composite additive and a preparation method thereof; calculated according to the weight percentage, the composite additive is prepared by the compositing of 44 percent to 59 percent of inorganic ultra-early-strength activator, 28 percent to 41 percent of anhydrite/dihydrate gypsum and 10 percent to 20 percent of organic surfactant. The invention firstly adopts fluoroaluminate as the activator to prepare the ultra-early-strength additive by the compositing with the organic surfactant, utilizes the fast-setting rapid-hardening characteristics of the fluoroaluminate to provide early strength, simultaneously activates the hydration of C2S and C3S in cement minerals, and greatly reduces the water-cement ratio of concrete by doping the organic surfactant, thereby leading the concrete to achieve ultra early strength. By doping 5 percent to 8 percent of the product into ordinary concrete, the concrete can achieve ultra early strength, achieve the strength which can be achieved by the concrete with 28 days during 3 day ages and lead the later strength to still have good increasing momentum. The product can be widely used in construction engineering, municipal construction, military rush-repair work and the like, can greatly shorten the construction cycle and speed up the project progress, and has remarkable economic and social benefits.
Description
Technical field:
The present invention relates to a kind of super morning in the concrete of strong, high-strength compound admixture and preparation method thereof that adds to, belong to building material technical field.
Background technology:
Super early strong admixture is to add in the building trade in the concrete to improve concrete intensity, shortens concrete curing age, accelerates speed of application, accelerates the material of template turnover.Concrete early strength agent comparatively commonly used at present mainly contains villaumite system, vitriol system, carbonate system, organic system, mineral substance and complex accelerator.Existing hardening accelerator can only improve 30%～60% with 3 days, 7 days intensity of concrete, and easily introduces chlorion or basic metal, and chlorion easily causes steel bar corrosion, and the too high alkali that easily causes of alkali metal content causes structure deteriorate.
(1) villaumite is that hardening accelerator mainly contains calcium chloride, sodium-chlor, Repone K, aluminum chloride etc.Its generation strong mechanism morning is mainly the C in muriate and the cement
3The A effect generates water-fast aquation chloro-aluminate, has quickened the C3A aquation in the cement.The opinion with early strength function only, villaumite system is the pretty good hardening accelerator of effect, also is the human concrete early strength agent of using the earliest.But because chlorine ion concentration increases, make the bigger electropotential of generation between reinforcing bar and the chlorion, this just makes steel bar corrosion easily, thereby villaumite is that the application of hardening accelerator has significant limitation, most concrete workses all limits the application of this series hardening accelerator, and China's concrete works standard also has strict restriction to this.
(2) vitriol is that hardening accelerator mainly contains sodium sulfate, calcium sulfate, Tai-Ace S 150 and aluminum potassium sulfate etc.Using maximum is sodium sulfate hardening accelerator.The effect that sodium sulfate hardening accelerator reaches under lower curing temperature condition in the lower cement of early stage intensity is apparent in view, simultaneously later strength is also improved.And not only under normal temperature and cold condition, quicken gain in strength, under the vapor cure condition, also can improve concrete intensity.
But, along with the enforcement of the new cement standard of China and the manufacture of cement of China integrate with gradually with abroad, some large-scale cement factories adopt the new firing technology of the rotary kiln with a precalcinator, the cement clinker strength grade that generates improves, the mixing material addition content reduces in the cement, has occurred sodium sulfate hardening accelerator and this type of cement is not got up early has pretended the phenomenon of usefulness.Think according to relevant expert research, this mainly be since the early strength function of sodium sulfate in the activity of stimulating activity mixing material, quicken aspect the pozzolanic reaction stronglyer, skillful material silicate cement is excited, activates and early potent fruit is then relatively poor.American-European countries is because application of pure clinker aggregate portland cement more, so sodium sulfate is not used as hardening accelerator in these countries.
In addition, vitriol is the defective that sodium (potassium) ion itself existence in the hardening accelerator is difficult to overcome.One of them is, because K
+, Na
+Not with hydrated cementitious product chemical combination, and all easily dissolvings of its esters, thereby more residuing in the concrete liquid phase, this is the one of the main reasons that concrete surface is saltoutd.Saltout and make concrete surface form white pollution; What is more, and sodium salt expands in the concrete surface layer crystallization, very likely causes concrete crack of surface layer even come off, and engineering is caused very big harm.Thereby to limit sodium (potassium) in this type of engineering be the application of hardening accelerator.Another reason is that sodium (potassium) is that hardening accelerator has born defective: have the potentially dangerous that easily causes alkali, causes destroying concrete structure.This has also limited the use of this serial hardening accelerator to a great extent.
(3) organic system hardening accelerator mainly contains trolamine, tri-isopropanolamine, methyl alcohol, ethanol or the like, and the most frequently used is trolamine.In the practical application, the morning of trolamine hardening accelerator, potent fruit was not fine always, and volume is atomic, and bad control can cause serious slow setting of concrete and concrete strength to descend when volume is too much.
Present other kind hardening accelerator of using, or exist early strong poor effect, or influence later strength, or problems such as raw material sources difficulty, production cost height, its production, application all are subjected to certain limitation.
Because all there is such or such deficiency in traditional hardening accelerator, early potent fruit is not remarkable in addition, therefore, studies organic certainty that is social development and scientific progress with hardening accelerator inorganic compounding.
Summary of the invention:
The objective of the invention is to: provide a kind of super morning strong, high-strength compound admixture and preparation method thereof.Product of the present invention adopts inorganic super rapid hardening excitant component to be aided with that a small amount of organic surface active agent is compound to develop, mixing this product of 5%～8% in normal concrete can make concrete reach super early strong, promptly reach the intensity that concrete just can reach in 28 days the 3 day length of time, and later strength still has good growth.
The present invention constitutes like this: a kind of super morning strong, high-strength compound admixture, calculate according to weight percent, it is the inorganic super rapid hardening excitant with 44%～59%, 28%～41% anhydrite (CaSO
4)/dihydrate gypsum (CaSO
42H
2O) and 10%～20% organic surface active agent compounded; Preferably with 54% inorganic super rapid hardening excitant, anhydrite/dihydrate gypsum of 36% and 10% compound the making of organic surface active agent.
The weight content that described inorganic super rapid hardening excitant is a fluoaluminate is 80%～90% mineral.
Calculate according to weight percent, the weight content of aforementioned fluoaluminate is that 80%～90% mineral are that Wingdale, 30%～41% bauxitic clay and 4%～5% fluorite with 55%～65% is that the raw material calcining forms; Be that the raw material calcining forms preferably with 56.6% Wingdale, 39% bauxitic clay and 4.4% fluorite.
Described organic surface active agent is beta-naphthalenesulfonic-acid formaldehyde condensation compound or poly carboxylic acid condenses.
Super morning of the present invention, preparation method strong, the high-strength compound admixture was: take by weighing inorganic super rapid hardening excitant, anhydrite/dihydrate gypsum and organic surface active agent in proportion, will inorganic super rapid hardening excitant and anhydrite/dihydrate gypsum mixing is levigate to specific surface area be 550～650m
2/ kg mixes organic surface active agent again, mixing, promptly.
The preparation method is more specifically: take by weighing Wingdale, bauxitic clay and fluorite in proportion, mixer mill is fine into the spherical particle of diameter 5～10mm, calcines 1～2 hour down at 1200～1250 ℃, and obtaining with the fluoaluminate is the mineral of major ingredient; With these mineral and anhydrite/dihydrate gypsum be mixed in proportion levigate to specific surface area be 550～650m
2/ kg mixes beta-naphthalenesulfonic-acid formaldehyde condensation compound more in proportion, mixing, promptly.
The present invention adopts fluoaluminate as inorganic super rapid hardening excitant and the super early strong admixture of the compound manufacturing of beta-naphthalenesulfonic-acid formaldehyde condensation compound first, utilize the fast fast with fixed attention hard characteristics of inorganic super rapid hardening excitant (fluoaluminate) that early strength is provided, the formation of inorganic super rapid hardening excitant hydrated product simultaneously reduces C
3S-H
2The pH value of O system [consumes Ca (OH)
2], thereby quickened cement minerals in forming C2S and the aquation of C3S, play the effect of the further aquation of excited cement; In addition, mixing of organic surface active agent β naphthalene sulfonic acidformaldehyde condensation product greatly reduces concrete water cement ratio, effectively improved concrete strength and concrete permeability resistance, weather resistance; The two effect makes concrete reach super early strong.Mix this product of 5%～8% (with respect to cement weight) in normal concrete, can make concrete reach super early strong, promptly reach the intensity that concrete just can reach in 28 days the 3 day length of time, and later strength still has good growth.
Prepared super morning of the present invention, main economic and technical indices strong, the high-strength compound additive product was as follows:
Existing like product can only improve 30%～60% with 3～7 days intensity of concrete.Following table is that the concrete technology of mixing hardening accelerator that " concrete admixture " (GB8076-1997) stipulated requires:
This table has reacted GB to mixing the concrete strength and the ratio requirement of not mixing the concrete strength of hardening accelerator behind the hardening accelerator.As seen, even acceptable end product, one day intensity also only improves and improved raising 10% in 30%, 7 day in 36%, 3 day, and the real data of producer affirms that overgauge requires data under the normal circumstances, but also far can not arrive design strength requirement in 28 days at 3 days.
Product of the present invention can be widely used in construction work, urban construction, military salvaging etc., can shorten construction period greatly, speed up the work, economic benefit and obvious social benefit.
Embodiment:
Embodiments of the invention 1: surpass preparation early strong, the high-strength compound admixture:
Take by weighing Wingdale 56.6kg, bauxitic clay 39kg and fluorite 4.4kg, mix, be finely ground to the spherical particle of diameter 8mm, place the shaft kiln of φ 400 * 2000 with ball mill, calcined 1 hour down at 1250 ℃, obtaining with the calcium aluminum fluoride is the mineral of major ingredient (weight content 90%); Mix these mineral 51 weight parts levigate with anhydrite 34 weight parts to specific surface area 620m
2/ kg mixes beta-naphthalenesulfonic-acid formaldehyde condensation compound 15 weight parts again, mixing, promptly.
This additive product of water mixing mud weight 5%～8% in normal concrete can make concrete reach super early strong, and promptly reach the intensity that concrete just can reach in 28 days the 3 day length of time, and later strength still has good growth.
Embodiments of the invention 2: take by weighing Wingdale 55kg, bauxitic clay 40kg and fluorite 5kg, mixer mill is fine into the spherical particle of diameter 5～7mm, calcines 2 hours down at 1200 ℃, and obtaining with the fluoaluminate is the mineral of major ingredient (weight content 85%); Mix these mineral 59 weight parts levigate with anhydrite 31 weight parts to specific surface area 640m
2/ kg mixes beta-naphthalenesulfonic-acid formaldehyde condensation compound 10 weight parts again, and mixing promptly gets super early strong, the high-strength compound admixture of the present invention.
Embodiments of the invention 3: take by weighing Wingdale 65kg, bauxitic clay 30kg and fluorite 5kg, mixer mill is fine into the spherical particle of diameter 8～10mm, calcined 1.5 hours down at 1200～1250 ℃, obtaining with the fluoaluminate is the mineral of major ingredient (weight content 80%); Mix these mineral 44 weight parts levigate with dihydrate gypsum 36 weight parts to specific surface area 600m
2/ kg mixes beta-naphthalenesulfonic-acid formaldehyde condensation compound 20 weight parts again, and mixing promptly gets super early strong, the high-strength compound admixture of the present invention.
Embodiments of the invention 4: take by weighing Wingdale 55kg, bauxitic clay 41kg and fluorite 4kg, mixer mill is fine into the spherical particle of diameter 6～8mm, calcines 2 hours down at 1200～1250 ℃, and obtaining with the fluoaluminate is the mineral of major ingredient (weight content 〉=80%); Mix these mineral 54 weight parts levigate with anhydrite 28 weight parts to specific surface area 550～580m
2/ kg mixes poly carboxylic acid condenses 18 weight parts again, and mixing promptly gets super early strong, the high-strength compound admixture of the present invention.
Compound additive product of the present invention only needs a by specification to require when mixing and stirring concrete and sand, stone, cement add stirring simultaneously and gets final product in use.Its incorporation is 5%～8% (in mix, equivalent replaces cement) of cement weight.
Claims (8)
1. one kind surpasses early strong, high-strength compound admixture, it is characterized in that: calculate according to weight percent, it is that inorganic super rapid hardening excitant, anhydrite/dihydrate gypsum of 28%～41% and 10%～20% organic surface active agent with 44%～59% is compounded.
2. according to claim 1 described super morning of strong, high-strength compound admixture, it is characterized in that: calculate according to weight percent, it is that inorganic super rapid hardening excitant, anhydrite/dihydrate gypsum of 36% and 10% organic surface active agent with 54% is compounded.
3., high-strength compound admixture strong according to claim 1 or 2 described super morning, it is characterized in that: the weight content that described inorganic super rapid hardening excitant is a fluoaluminate is 80%～90% mineral.
4. according to claim 3 described super morning of strong, high-strength compound admixture, it is characterized in that: calculate according to weight percent, the weight content of described fluoaluminate is that 80%～90% mineral are that Wingdale, 30%～41% bauxitic clay and 4%～5% fluorite with 55%～65% is that the raw material calcining forms.
5. according to claim 4 described super morning of strong, high-strength compound admixture, it is characterized in that: calculate according to weight percent, the weight content of described fluoaluminate is that 80%～90% mineral are that Wingdale, 39% bauxitic clay and 4.4% fluorite with 56.6% is that the raw material calcining forms.
6., high-strength compound admixture strong according to claim 1 or 2 described super morning, it is characterized in that: described organic surface active agent is beta-naphthalenesulfonic-acid formaldehyde condensation compound or poly carboxylic acid condenses.
As among the claim 1-6 as described in each super morning strong, high-strength compound admixture the preparation method, it is characterized in that: take by weighing inorganic super rapid hardening excitant, anhydrite/dihydrate gypsum and organic surface active agent in proportion, with inorganic super rapid hardening excitant and anhydrite/dihydrate gypsum mix levigate to specific surface area be 550～650m2/kg, mix organic surface active agent again, mixing, promptly.
8. the preparation method of, high-strength compound admixture strong according to claim 7 described super morning, it is characterized in that: take by weighing Wingdale, bauxitic clay and fluorite in proportion, mixer mill is fine into the spherical particle of diameter 5～10mm, calcined 1～2 hour down at 1200～1250 ℃, obtaining with the fluoaluminate is the mineral of major ingredient; With these mineral and anhydrite/dihydrate gypsum be mixed in proportion levigate to specific surface area be 550～650m2/kg, mix beta-naphthalenesulfonic-acid formaldehyde condensation compound more in proportion, mixing, promptly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103025743A CN101555108A (en) | 2009-05-25 | 2009-05-25 | Ultra-early-strength high-strength composite additive and preparation method thereof |
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|---|---|---|---|
| CNA2009103025743A CN101555108A (en) | 2009-05-25 | 2009-05-25 | Ultra-early-strength high-strength composite additive and preparation method thereof |
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| CN101555108A true CN101555108A (en) | 2009-10-14 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773970A (en) * | 2015-03-23 | 2015-07-15 | 吉林市晶晶机械设备有限公司 | Rapid setting reinforcing agent for Portland cement foamed lightweight partition boards, and preparation method thereof |
| CN108249846A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of non-evaporating curing concrete prefabricated components and its forming method |
| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | A kind of cement hard additive and its application fastly |
| CN110668769A (en) * | 2019-11-12 | 2020-01-10 | 长安大学 | Permeable crystallization type grouting material and preparation method thereof |
| CN110981254A (en) * | 2019-12-25 | 2020-04-10 | 福泉凯威特新材料有限公司 | Coagulation accelerating early strength agent suitable for cement-based 3D printing material and preparation method thereof |
| CN114249574A (en) * | 2021-12-10 | 2022-03-29 | 河南强耐新材股份有限公司 | Novel gypsum-based exhaust passage product and preparation method thereof |
-
2009
- 2009-05-25 CN CNA2009103025743A patent/CN101555108A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104773970A (en) * | 2015-03-23 | 2015-07-15 | 吉林市晶晶机械设备有限公司 | Rapid setting reinforcing agent for Portland cement foamed lightweight partition boards, and preparation method thereof |
| CN108249846A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of non-evaporating curing concrete prefabricated components and its forming method |
| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | A kind of cement hard additive and its application fastly |
| CN109160762B (en) * | 2018-08-23 | 2021-04-16 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN110668769A (en) * | 2019-11-12 | 2020-01-10 | 长安大学 | Permeable crystallization type grouting material and preparation method thereof |
| CN110981254A (en) * | 2019-12-25 | 2020-04-10 | 福泉凯威特新材料有限公司 | Coagulation accelerating early strength agent suitable for cement-based 3D printing material and preparation method thereof |
| CN114249574A (en) * | 2021-12-10 | 2022-03-29 | 河南强耐新材股份有限公司 | Novel gypsum-based exhaust passage product and preparation method thereof |
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Open date: 20091014 |