CN105884239B - A kind of aluminium sulfate portland cement compound system additive, high-early strength concrete and preparation method thereof - Google Patents
A kind of aluminium sulfate portland cement compound system additive, high-early strength concrete and preparation method thereof Download PDFInfo
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- CN105884239B CN105884239B CN201610221606.7A CN201610221606A CN105884239B CN 105884239 B CN105884239 B CN 105884239B CN 201610221606 A CN201610221606 A CN 201610221606A CN 105884239 B CN105884239 B CN 105884239B
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
- C07C69/73—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of unsaturated acids
- C07C69/732—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of unsaturated acids of unsaturated hydroxy carboxylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/106—Esters of polycondensation macromers
- C08F222/1063—Esters of polycondensation macromers of alcohol terminated polyethers
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Abstract
The invention discloses a kind of aluminium sulfate portland cement compound system additive and the aluminium sulfate Portland cement base high-early strength concrete of preparation.The aluminium sulfate portland cement compound system additive is made up of water reducer, retarder, early strength agent and antifreezing agent, and mass percent is shared by each component：Water reducer 70 78%, early strength agent 1.2 2.5%, retarder 18 25%, antifreezing agent 2 4%.Aluminium sulfate portland cement compound system additive of the present invention can significantly improve the initial flow performance of aluminium sulfate Portland cement concrete (PCC), delay the setting time of cementitious composite system, reduce slump-loss, effectively solves the contradiction between mobility and early strength, with the composite effect such as diminishing, slow setting, early strong, and the preparation method being related to is simple, is adapted to popularization and application.
Description
Technical field
The invention belongs to building material field, and in particular to a kind of aluminium sulfate-portland cement compound system additive,
High-early strength concrete and preparation method thereof.
Background technology
The clinker of common sulphate aluminium cement (SAC) be lime stone, alumina and gypsum using proper composition as raw material, in
1300-1400 DEG C of calcination forms, and clinker essential mineral is C4A3S and C2S, there are free gypsum and iron phase on a small quantity.C4A3S mineral make
Sulphate aluminium cement has the good characteristics such as early strong, high-strength, impervious, freeze proof, anti-corrosion and low alkalinity, while C4A3S hydration activities are very
Height, early stage can form substantial amounts of entringite (AFt), C-S-H and aluminium hydroxide (AH3) gel, cement is obtained higher early stage
Intensity, 1d and 3d intensity can reach the 60-70% of 28d intensity.Its hypotonicity and resisting erosion of sulfate, freeze thawing resistance, anti-carbonation
High-durability energy, be widely used in rushing to repair rush construction engineering, prefabricated components, GRC products, low-temperature construction engineering, anti-seawater corrosion
In engineering and road quick patching engineer applied.
But the setting time of quick hardening sulphoaluminate cement is very short, initial set is only 30 minutes or so, significantly limit and applies
The convenience of work.In the application of Ordinary Rd quick fix engineering, initialization performance, the slump especially to concrete through when
Loss and extreme early intensity propose high requirement.Portland cement setting time is grown, and early strength is less than aluminium sulfate
Cement concrete, concrete initial fluidity can be increased by the way of sulphate aluminium cement and common silicate cement are compound,
Slump Time losing of Large is reduced, but with the increase of Portland cement volume, its cement concrete quick setting early strength characteristic
Fade away, early strength declines rapidly.So for binary complex cement working performance of concrete present in Practical Project
Contradiction with early mechanics characteristics is, it is necessary to research and develop a kind of aluminium sulfate-portland cement compound system special additive to improve
Service behaviour, early stage mechanics and the endurance quality of high-early strength concrete.But traditional additive is suitable only for aluminium sulfate
Aqueous systems or portland cement system, and be difficult to show the adaptability to binary complex system.
The content of the invention
It is an object of the invention to provide a kind of aluminium sulfate-portland cement compound system additive and the sulphur aluminic acid of preparation
Salt-Portland cement base high-early strength concrete, the aluminium sulfate-portland cement compound system additive can significantly change
The initial flow performance of kind aluminium sulfate-Portland cement concrete (PCC), delay the setting time of cementitious composite system, reduce and collapse
Loss is spent, effectively solves the contradiction of mobility and early strength, there is the composite effect such as diminishing, slow setting, early strong, and the system being related to
Preparation Method is simple, is adapted to popularization and application.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of aluminium sulfate-portland cement compound system additive, it is by water reducer, retarder, early strength agent and antifreeze
Agent is combined, and mass percent is shared by each component：Water reducer 70-78%, early strength agent 1.2-2.5%, retarder 18-
25%th, antifreezing agent 2-4%.
In such scheme, the general structure of the water reducer is：
Wherein, m=45-52；N=38-48；P=20-33；Water reducer molecular weight is controlled in 35000-50000.
In such scheme, the preparation method of the water reducer comprises the following steps：
1) by crotonic acid, polyethylene glycol butyl ether in molar ratio 1:(0.8-1.5) is added in reactor A, and addition accounts for reaction
Solution gross mass 1-3% chain-transferring agent (DMAP) and solution gross mass 0.2- in reactor A is accounted in kettle A
0.5% polymerization inhibitor (hydroquinones) is heated with stirring to 80-100 DEG C, and insulation reaction 4-8h obtains product A；By methylene-succinic acid and
Polyvinyl alcohol in molar ratio 1:(0.8-1.5) is added in reactor B, and addition accounts for solution gross mass 0.5-2.0% in reactor B
The concentrated sulfuric acid and addition account for the hydroquinones of solution gross mass 0.2-0.5% in reactor B, are heated with stirring to 75-85 DEG C, insulation is anti-
4-8h is answered to obtain product B；2) by gained reaction product A, B and sodium p styrene sulfonate in molar ratio 1:(0.8-1.2):(0.4-
0.7) it is added in reactor C, addition accounts for solution gross mass 10-30% TGA and mercaptopropionic acid mixing in reactor C
Thing, wherein TGA and mercaptopropionic acid mol ratio are 1:1,100-120 DEG C, insulation reaction 6-10h is then heated with stirring to, is delayed
It is slow to be cooled to 40 DEG C, add NaOH solution regulation PH and obtain the water reducer to neutral.
In such scheme, the early strength agent presses 7 by inorganic early strength agent and organic early strength agent:3-8:2 mass ratio it is compound and
Into.
In such scheme, the inorganic early strength agent is the one or more in lithium carbonate, sodium sulphate, aluminum sulfate, calcium chloride；
Organic early strength agent is the one or both mixing in triethanolamine, triisopropanolamine.
In such scheme, the general structure of the retarder is：
Wherein, a=1-5；B=1-5；C=1-5.
In such scheme, the preparation method of the retarder comprises the following steps：
1) by acrylic acid, D- glucose sugar in molar ratio (0.8-1.5):1 is added in reactor I, and addition is accounted in reactor I
Solution gross mass 0.5-2% chain-transferring agent (DMAP) and account for solution gross mass 0.2-0.5% in reactor I
Polymerization inhibitor (hydroquinones) is heated with stirring to 60-80 DEG C, and insulation reaction 3-5h obtains product C；By dibutene acid and 2,3- dihydroxy
Propionic acid is in molar ratio (0.8-1.5):1 is added in reactor II, and addition accounts for solution gross mass 0.5-2.0% in reactor II
The hydroquinones that the concentrated sulfuric acid and addition account for solution gross mass 0.2-0.5% in reactor II is heated with stirring to 60-75 DEG C, and insulation is anti-
2-4h is answered to obtain product D；2) by reaction product C, D and cinnamic acid in molar ratio 1:(0.5-1.5):(0.5-1.5) is added to instead
To answer in kettle III, the sodium hydrogensulfite that addition accounts for solution gross mass 10-30% in reactor III is heated with stirring to 100-120 DEG C,
Insulation reaction 6-10h, then to 40 DEG C, addition NaOH solution adjusts PH and obtains the retarder to neutral slow cooling.
In such scheme, the antifreezing agent be sodium carbonate, sodium acid carbonate, sodium acetate, urea, dihydric alcohol, fatty acid amide,
One or more in alkyl succinimide, acid phosphate amine salt.
Present invention also offers a kind of sulphur aluminium prepared using above-mentioned aluminium sulfate-portland cement compound system additive
Hydrochlorate-Portland cement base high-early strength concrete, it is by aluminium sulfate-portland cement, river sand, rubble, steel fibre, mineral
Admixture, water and sulphur aluminic acid-portland cement compound system additive composition, quality proportioning shared by each raw material are：Aluminium sulfate-
Portland cement 350-500kg/m3, river sand 720-800kg/m3, rubble 950-1050kg/m3, steel fibre 20-40kg/m3, ore deposit
Thing admixture 50-150kg/m3, water 160-220kg/m3, wherein aluminium sulfate-portland cement compound system admixture dosage accounts for
The 0.5-2.0% of other each component gross masses of aluminium sulfate-Portland cement base high-early strength concrete；Aluminium sulfate-silicic acid
Salt cement is mixed by sulphate aluminium cement and portland cement, and the volume of sulphate aluminium cement is aluminium sulfate-silicate
The 20-60% of cement gross mass.
In such scheme, the mineral admixture is the one or more in flyash, wollastonite, metakaolin, miberal powder.
In such scheme, the steel fibre is shear model steel fiber, tensile strength >=400Mpa, draw ratio 50-100.
A kind of preparation method of above-mentioned aluminium sulfate-Portland cement base high-early strength concrete, comprises the following steps：1)
Each raw material is weighed by proportioning, quality proportioning shared by each raw material is：Aluminium sulfate-portland cement 350-500kg/m3, river sand
720-800kg/m3, rubble 950-1050kg/m3, steel fibre 20-40kg/m3, mineral admixture 50-150kg/m3, water 160-
220kg/m3, wherein aluminium sulfate-portland cement compound system admixture dosage accounts for aluminium sulfate-Portland cement base is hard soon
The 0.5-2.0% of other each component gross masses of early strength concrete；2) it is aluminium sulfate-portland cement, river sand, rubble, steel is fine
Peacekeeping mineral admixture mixing dry mixing 1-2min；3) add aluminium sulfate-portland cement compound system additive and water continues
Mix 1-2min produces described aluminium sulfate-Portland cement base high-early strength concrete.
The present invention is good to the system adaptability by being designed for sulphate aluminium cement and portland cement compound system
Good additive, and by the way that by sulphate aluminium cement and portland cement, compound to prepare aluminium sulfate-Portland cement base hard soon
Early strength concrete, ensure its service behaviour and early strength coordination between the two and uniformly：1) by the way that copolymerization and scion grafting is blended
Copolymerization organic synthesis technology introduces multiple sulfonic acid groups in poly carboxylic acid series water reducer main chain, and enhancing water reducer molecular backbone is to sulphur
C in aluminate cement4A3S and C2The suction-operated of S particles, polyhydroxy ethers structure is introduced in side chain, is subtracted so as to strengthen polycarboxylic acids
Aqua delays concrete slump loss to the high model retention effect of hydrated blended cement system；Polyhydroxy is introduced in retarder simultaneously
Acid, benzene sulfonic acid side chain, polyhydroxy-acid branched structure and benzene sulfonic acid sodium salt can delay the C in complex cement4AF、C2S、C3S early stage
Hydration reaction, play the composite effect for protecting modeling and diminishing；The addition of other antifreezing agent avoids the icing of water low temperature, advantageously in
Concrete low temperature mix is constructed and low-temperature stabilization performance；2) concrete early strength agent is designed using the method for Organic-inorganic composite,
Inorganic early strength agent, which is commonly used in sulphate aluminium cement concrete, preferable early strong effect, and organic early strength agent is in silicate
The calcium solubility that can be increased sharply in system and system basicity, promote the formation of entringite and C-S-H gels, pass through organic-nothing
The use of machine complex accelerator, can significantly reduce the volume of early strength agent, and early strong effect meets detail design requirement；3) glue is passed through
Gel material composite design and water reducer, design and the selection of retarder, early strength agent can effectively reduce the volume of gained additive, work
Make performance and early strength meets construction requirement, while the high-early strength concrete cost prepared substantially reduces；4) using common
Portland cement substitutes part sulphate aluminium cement, delays the setting time of concrete, increases construction operation time, while also drop
Low concrete production cost.
Compared with prior art, beneficial effects of the present invention are：
1) aluminium sulfate of the present invention-portland cement compound system additive can be effectively improved aluminium sulfate-silicic acid
Contradiction between the service behaviour and early mechanics characteristics of the high-early strength concretes such as salt cement complex cementitious system, is fitted with cement
Answering property is good, and can suitably reduce gel material content.
2) aluminium sulfate-portland cement prepared using aluminium sulfate-portland cement compound system additive is compound
Initial slump/divergence of system concrete can reach 220/460mm, 1 hour 140/360mm, isolation rate ＜ 5%, and 1.5
Can be with pouring construction in hour；3h compression strength >=35Mpa, 28d compression strength >=50Mpa.
3) aluminium sulfate-Portland cement base prepared using aluminium sulfate-portland cement compound system additive is fast
Hard 28 days free shrinkages of early strength concrete are in 240-254 × 10-6, and 60d volumes are basicly stable, excellent in te pins of durability, more added with
Beneficial to concrete strength is continual and steady and low temperature resistivity energy.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below that
Conflict can is not formed between this to be mutually combined.
In following examples, unless specific instructions, the reagent of use is commercially available chemical reagent.
In following examples, the sulphate aluminium cement is the common sulphate aluminium cements of Zhengzhou space Xiang 42.5R；The silicic acid
Salt cement is the new 42.5R Portland cements of China；The early strength agent is multiple by the pure lithium carbonate of chemistry and triisopropanolamine (TIPA)
Conjunction forms；The sandstone raw material are common river sand, rubble；The steel fibre is shear model steel fiber, tensile strength >=
600Mpa, draw ratio 60.
Embodiment 1-3
Aluminium sulfate-portland cement compound system additive
Mass percent shared by each component in aluminium sulfate described in embodiment 1-3-portland cement compound system additive
1 is shown in Table respectively.The water reducer structural formula wherein used for：
Wherein, m=48；N=44；P=22；The control of water reducer molecular weight is 42000, and its preparation method includes following step
Suddenly：1) by crotonic acid, polyethylene glycol butyl ether in molar ratio 1:0.8 is added in reactor A, and it is total that addition accounts for solution in reactor A
The DMAP of quality 1.5% is heated with stirring to 90 with the hydroquinones for accounting for solution gross mass 0.3% in reactor A
DEG C, insulation reaction 6h obtains product A；By methylene-succinic acid and polyvinyl alcohol in molar ratio 1:1.2 are added in reactor B, add
Enter to account for the concentrated sulfuric acid of solution gross mass 2% and the hydroquinones stirring for accounting for solution gross mass 0.3% in reactor B in reactor B
85 DEG C are heated to, insulation reaction 5h obtains product B；2) by reaction product A, B and sodium p styrene sulfonate in molar ratio 1:0.9:0.5
It is added in reactor C, accounts for the TGA of solution gross mass 15% and mercaptopropionic acid mixture, wherein sulfydryl in reactor C
The mol ratio of acetic acid and mercaptopropionic acid is 1:1,105 DEG C, insulation reaction 8h are heated with stirring to, then slow cooling adds to 40 DEG C
Enter NaOH solution (mass concentration 30%) and adjust PH and produce the water reducer to neutrality.
The retarder structural formula used for：
Wherein, a=2；B=1；C=3, its preparation method comprise the following steps：1) by acrylic acid, D- glucose sugar by mole
Than 0.9:1 is added in reactor I, and addition accounts for the DMAP of solution gross mass 1.5% in reactor I and accounts for reaction
The hydroquinones of solution gross mass 0.4% is heated with stirring to 80 DEG C in kettle I, and insulation reaction 4h obtains product C；By dibutene acid and 2,
3- dihydroxypropionic acids in molar ratio 1.3:1 is added in reactor II, accounts for the concentrated sulfuric acid of solution gross mass 1.5% in reactor II
70 DEG C are heated with stirring to the hydroquinones for accounting for solution gross mass 0.3% in reactor II, insulation reaction 3h obtains product D；2) will
Reaction product C, D and cinnamic acid in molar ratio 1:0.7:1.2 are added in reactor III, and addition accounts for solution in reactor II
The sodium hydrogensulfite of gross mass 20% is heated with stirring to 115 DEG C, insulation reaction 8h, and then slow cooling adds NaOH to 40 DEG C
Solution (mass concentration 30%) adjusts PH and produces the retarder to neutrality.
The proportioning (%) of 1 embodiment of table, 1~3 aluminium sulfate-portland cement compound system additive
Increase by one group of comparative example on the basis of embodiment 1~3, additive is all using common poly carboxylic acid series water reducer, type
Number for Su Bote companies production YJ-1 types；Outside the aluminium sulfate-portland cement compound system prepared using embodiment 1~3
Agent and comparative example is added to be formulated preparing fast hardening early strength concrete, volume is arranged to 1.0%, and concrete mix is shown in Table 2, result of the test
It is shown in Table 3.
Concrete mix (the kg/m that the embodiment 1~3 of table 2, comparative example use3)
High-early strength concrete performance prepared by the embodiment 1~3 of table 3, comparative example
From table 3 it is observed that aluminium sulfate-portland cement compound system additive prepared by embodiment 1~3 is with mixing
The adaptability of solidifying soil is good, and concrete initial slump/fluidity is more than 220/460mm, and the slump/divergence is more than within 1 hour
155/360mm, construction requirement is met within 1.5 hours, concrete crushing strength is more than 30Mpa, 28 days compression strength after 3 hours
More than 50Mpa, the requirement to concrete flowability and early strength in practice of construction is fully met.
Embodiment 4-6
Aluminium sulfate-Portland cement base high-early strength concrete
The sulphur aluminic acid prepared using embodiment 1-portland cement compound system additive prepares aluminium sulfate-silicate cement
Mud base high-early strength concrete, match ratio are shown in Table 4, and each the performance test results of concrete are shown in Table 5, wherein aluminium sulfate-silicate
Cement is mixed by sulphate aluminium cement (SAC) and portland cement (POC), and specific mixed proportion is shown in Table 4.
Match ratio (the kg/m of high-early strength concrete prepared by the embodiment 4~6 of table 43)
The performance test results of high-early strength concrete prepared by the embodiment 4-6 of table 5
As can be seen from Table 5, the aluminium sulfate-portland cement compound system additive prepared using embodiment 1 is matched somebody with somebody
The concrete of system, with the increase of its volume (additive), the mobile performance of gained concrete, early mechanics characteristics obtain
It is effectively improved, realizes the proper extension of construction operation time and the lifting of early strength, possesses diminishing, slow setting, early strong answers
Close effect.
The above results show that aluminium sulfate produced by the present invention-portland cement compound system additive can be effectively increased
The initial flow performance of aluminium sulfate-Portland cement base high-early strength concrete, reduces concrete slump loss, and lifting is mixed
Native early strength grade is coagulated, is advantageous to practice of construction operation.
It the foregoing is only the preferred embodiment of the present invention, it is noted that come for one of ordinary skill in the art
Say, without departing from the concept of the premise of the invention, make some modifications and variations, these belong to the protection model of the present invention
Enclose.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (7)
1. a kind of aluminium sulfate-portland cement compound system additive, it is by water reducer, retarder, early strength agent and antifreezing agent
Composition, mass percent shared by each component are：It is water reducer 70-78%, early strength agent 1.2-2.5%, retarder 18-25%, antifreeze
Agent 2-4%；
The water reducer general structure is：
Wherein, m=45-52；N=38-48；P=20-33；Water reducer molecular weight is controlled in 35000-50000；
The early strength agent presses 7 by inorganic early strength agent and organic early strength agent:3-8:2 mass ratio is combined；
The general structure of the retarder is：
Wherein, a=1-5；B=1-5；C=1-5.
2. aluminium sulfate according to claim 1-portland cement compound system additive, it is characterised in that the nothing
Machine early strength agent is the one or more in lithium carbonate, sodium sulphate, aluminum sulfate, calcium chloride；Organic early strength agent be triethanolamine,
One or both mixing in triisopropanolamine.
3. aluminium sulfate according to claim 1-portland cement compound system additive, it is characterised in that described anti-
Jelly agent is sodium carbonate, sodium acid carbonate, sodium acetate, urea, dihydric alcohol, fatty acid amide, alkyl succinimide, acid phosphoric acid ester
One or more in amine salt.
4. a kind of aluminium sulfate-Portland cement base high-early strength concrete, it is characterised in that it is by aluminium sulfate-silicate
Cement, river sand, rubble, steel fibre, mineral admixture, water and sulphur aluminic acid-portland cement compound system additive composition, each original
Quality proportioning is shared by material：Aluminium sulfate-portland cement 350-500kg/m3, river sand 720-800kg/m3, rubble 950-
1050kg/m3, steel fibre 20-40kg/m3, mineral admixture 50-150kg/m3, water 160-220kg/m3, wherein aluminium sulfate-
It is total that portland cement compound system admixture dosage accounts for aluminium sulfate-other each components of Portland cement base high-early strength concrete
The 0.5-2.0% of quality；Aluminium sulfate-portland cement is mixed by sulphate aluminium cement and portland cement, sulphur aluminic acid
The volume of salt cement is the 20-60% of aluminium sulfate-portland cement gross mass；Sulphur aluminic acid-portland cement the complex
Series additive is sulphur aluminic acid-portland cement compound system additive described in claim any one of 1-3.
5. aluminium sulfate according to claim 4-Portland cement base high-early strength concrete, it is characterised in that described
Mineral admixture is the one or more in flyash, wollastonite, metakaolin, miberal powder.
6. aluminium sulfate according to claim 4-Portland cement base high-early strength concrete, it is characterised in that described
Steel fibre is shear model steel fiber, tensile strength >=400Mpa, draw ratio 50-100.
7. the preparation method of aluminium sulfate-Portland cement base high-early strength concrete described in claim any one of 4-6, its
It is characterised by, comprises the following steps：1) each raw material is weighed by proportioning, quality proportioning shared by each raw material is：Aluminium sulfate-silicate
Cement 350-500kg/m3, river sand 720-800kg/m3, rubble 950-1050kg/m3, steel fibre 20-40kg/m3, mineral blending
Expect 50-150kg/m3, water 160-220kg/m3, wherein aluminium sulfate-portland cement compound system admixture dosage accounts for sulphur aluminic acid
The 0.5-2.0% of other each component gross weights of salt-Portland cement base high-early strength concrete；2) by aluminium sulfate-silicate
Cement, river sand, rubble, steel fibre and mineral admixture mixing dry mixing 1-2min；3) it is compound to add aluminium sulfate-portland cement
System additive and water continue mix 1-2min and produce described aluminium sulfate-Portland cement base high-early strength concrete.
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|---|---|---|---|---|
| CN107827419A (en) * | 2017-11-24 | 2018-03-23 | 广州市公路勘察设计有限公司 | Early strong retarded concrete of low alkalinity and preparation method thereof |
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| CN115677253B (en) * | 2022-11-10 | 2024-02-06 | 绵阳市安州区荣盛建材有限公司 | Multi-cement composite early strength agent and application thereof in concrete member |
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