CN117142828A - Quick-hardening early-strength sulphoaluminate cement concrete and preparation method thereof - Google Patents
Quick-hardening early-strength sulphoaluminate cement concrete and preparation method thereof Download PDFInfo
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- CN117142828A CN117142828A CN202310307858.1A CN202310307858A CN117142828A CN 117142828 A CN117142828 A CN 117142828A CN 202310307858 A CN202310307858 A CN 202310307858A CN 117142828 A CN117142828 A CN 117142828A
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- 239000004568 cement Substances 0.000 title claims abstract description 67
- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 24
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims description 23
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 20
- 239000000176 sodium gluconate Substances 0.000 claims description 20
- 229940005574 sodium gluconate Drugs 0.000 claims description 20
- 235000012207 sodium gluconate Nutrition 0.000 claims description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 19
- 235000010755 mineral Nutrition 0.000 claims description 19
- 239000011707 mineral Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- 229910021487 silica fume Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000007580 dry-mixing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 abstract description 8
- 238000006703 hydration reaction Methods 0.000 abstract description 7
- 230000036571 hydration Effects 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003469 silicate cement Substances 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000002829 reductive effect Effects 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum ions Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a quick-hardening early-strength sulphoaluminate cement concrete, which comprises raw materials including cementing materials, coarse aggregate, fine aggregate, a water reducing agent, a retarder, an early-strength agent and water; can be quickly coagulated in a short time and generate higher early strength so as to meet the requirements of quick repair, acceleration of production efficiency and the like, and has good durability. The sulphoaluminate cement is selected as a main cementing material, so that the concrete can be quickly coagulated and hardened in early stage, thereby establishing higher strength, and effectively avoiding the defect of slow development of the early strength of the ordinary silicate cement. Meanwhile, compared with common silicate cement, the sulphoaluminate cement is low-energy-consumption cement, and meets the requirements of energy conservation and environmental protection. The liquid triethanolamine is selected as an early strength agent, and the early strength of the concrete is further improved by utilizing the characteristic of accelerating the hydration of cement; through the synergistic effect of the sulphoaluminate cement and the liquid triethanolamine early strength agent, the early strength of the concrete for 8 hours can reach more than 35MPa, the later strength is not reduced, the durability is good, and the concrete can be used in the field of quick repair and can quickly restore traffic.
Description
Technical Field
The invention relates to a building material, in particular to a quick-hardening early-strength sulphoaluminate cement concrete and a preparation method thereof.
Background
At present, traffic facilities such as roads, bridges, tunnels and the like are increasingly damaged, and when the service life of the concrete pavement is far less than the design service life, obvious hidden dangers and diseases appear, so that the service functions of the concrete pavement and the bearing capacity of the structure are seriously affected. For municipal rush-repair engineering, especially for rush-repair of roads, the requirements for quick repair materials are raised to be completed and put into use. The early strength of the ordinary Portland cement is slow to develop, the curing time is long, and the requirement of quick application cannot be met.
Therefore, there is a need for a rapid hardening early strength concrete that can be quickly set in a short time and produce high early strength to meet the requirements of rapid repair, acceleration of production efficiency, etc., while having good durability.
Disclosure of Invention
Therefore, the invention aims to provide the rapid hardening early strength sulphoaluminate cement concrete and the preparation method thereof, which can be quickly coagulated in a short time and generate higher early strength so as to meet the requirements of rapid repair, acceleration of production efficiency and the like, and simultaneously have good durability.
The quick-hardening early-strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 420-480 parts of cementing material, 1010-1050 parts of coarse aggregate, 720-770 parts of fine aggregate, 8-10 parts of water reducer, 0.2-0.4 part of retarder, 0.2-0.5 part of early strength agent and 150-200 parts of water;
further, the raw materials comprise the following components in parts by weight: 450 parts of cementing material, 1030 parts of coarse aggregate, 740 parts of fine aggregate, 9 parts of water reducer, 0.3 part of retarder, 0.3 part of early strength agent and 170 parts of water;
further, the cementing material at least comprises sulphoaluminate cement;
further, the cementing material also comprises one or two mixtures of mineral powder and silica fume;
further, the early strength agent is liquid triethanolamine;
further, the retarder is powdery sodium gluconate;
further, the water reducer is a polycarboxylic acid high-performance water reducer;
further, the mineral powder is S95 grade, and the specific surface area is more than 480m 2 /kg; siO of the silica fume 2 The content is more than 92 percent, the specific surface area is more than 17000m 2 A/kg, 28d activity index greater than 115%;
further, the coarse aggregate is formed by mixing crushed stone with the grain diameter of 5-10mm and 10-20mm according to a certain proportion, and the stacking density is 1500-1600kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The fine aggregate is machine-made sand medium sand, and the fineness modulus is 2.3-3.0;
the invention also discloses a preparation method of the sulphoaluminate cement quick-hardening and early-strength concrete, which comprises the following steps:
(1) Uniformly dry-mixing sulphoaluminate cement, mineral powder, silica fume and aggregate to obtain a mixture A;
(2) Stirring sodium gluconate powder and water to fully dissolve the sodium gluconate powder to obtain a mixture B;
(3) And adding the mixture B and the polycarboxylic acid high-performance water reducer into the mixture A, and uniformly stirring to obtain the sulphoaluminate cement quick-hardening early-strength concrete.
The invention has the beneficial effects that: the rapid hardening early strength sulphoaluminate cement concrete and the preparation method thereof can be quickly coagulated in a short time and generate higher early strength so as to meet the requirements of rapid repair, acceleration of production efficiency and the like, and simultaneously have good durability. The sulphoaluminate cement is selected as a main cementing material, so that the concrete can be quickly coagulated and hardened in early stage, thereby establishing higher strength, and effectively avoiding the defect of slow development of the early strength of the ordinary silicate cement. Meanwhile, compared with common silicate cement, the sulphoaluminate cement is low-energy-consumption cement, and meets the requirements of energy conservation and environmental protection. The liquid triethanolamine is selected as an early strength agent, and the early strength of the concrete is further improved by utilizing the characteristic of accelerating the hydration of cement; through the synergistic effect of the sulphoaluminate cement and the liquid triethanolamine early strength agent, the early strength of the concrete for 8 hours can reach more than 35MPa, the later strength is not reduced, the durability is good, and the concrete can be used in the field of quick repair and can quickly restore traffic. The powdered sodium gluconate is used as retarder to regulate setting time, and the initial setting time of concrete is regulated to 1-2 h, so that the strength can be developed rapidly in early stage, and enough construction time can be given.
In the invention, the sulphoaluminate cement is selected as a main cementing material, wherein the main mineral composition of the sulphoaluminate cement is approximately 51-72% of anhydrous calcium sulphoaluminate, 9-33% of dicalcium silicate and 4-12% of iron phase, and a small amount of other mineral components such as free gypsum and the like are also present. After water is added and mixed, anhydrous calcium sulfoaluminate reacts with gypsum quickly to generate hydration products such as ettringite, alumina gel and the like, so that the quick setting and hardening of concrete can be assisted in early stage, and higher strength is established.
In the invention, sodium gluconate is taken as retarder to regulate and control the coagulation time, and because the sodium gluconate is taken as organic carboxylic acid to be mixed with Ca 2+ And Al 3+ The method has the advantages that the method has a good complexing effect, the formed metastable complex wraps the surface of the cement particles, the purpose of inhibiting the dissolution of the cement particles is achieved, the stability of the concentration of calcium and aluminum ions in the cement paste is maintained, and the crystallization of AFt is prolonged to generate so as to achieve the retarding effect of the concrete.
In the invention, the early strength of the concrete is improved by selecting the triethanolamine as the early strength agent, and the triethanolamine has lone pair electrons and is easy to be combined with Al 3+ 、Ca 2+ The plasma cations undergo complex reaction to destroy C 3 An impermeable layer of A, accelerate C 3 Hydration of A. Meanwhile, more soluble areas are formed on the surface of the cement due to the generation of the complex, the solubilization is achieved, and the dissolution rate of cement particles and the diffusion rate of hydration products are accelerated, so that hydration reaction is accelerated, and a large number of AFt crystals are formed. The triethanolamine also has the emulsification effect, can be adsorbed on the surface of cement particles, avoids aggregation of the cement particles, reduces the surface tension of a system, increases the contact area of water and cement, promotes hydration reaction, is beneficial to coagulation and compaction of cement stones, and improves early strength.
Detailed Description
For a better understanding of the present invention, the following examples are further illustrative of the present invention, but the contents of the present invention are not limited to the following examples only.
In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used, unless otherwise specified, are commercially available.
Example 1
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 394 parts of sulphoaluminate cement, 45 parts of mineral powder, 11 parts of silica fume, 1030 parts of coarse aggregate, 746 parts of fine aggregate, 9 parts of water reducer, 0.27 part of retarder, 0.315 part of early strength agent and 184 parts of water. The early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer. The initial setting time and the final setting time of the prepared quick-hardening early-strength concrete are 78min and 123min respectively, and the compressive strength of 8h and the compressive strength of 28d are 36.2MPa and 67.4MPa respectively.
Example two
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 385 parts of sulphoaluminate cement, 44 parts of mineral powder, 11 parts of silica fume, 1030 parts of coarse aggregate, 746 parts of fine aggregate, 8 parts of water reducer, 0.26 part of retarder, 0.308 part of early strength agent and 154 parts of water. The early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
The initial setting time and the final setting time of the prepared quick-hardening early-strength concrete are 85min and 136min respectively, and the compressive strength for 8h and the compressive strength for 28d are 32.7MPa and 63.6MPa respectively.
Example III
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 414 parts of sulphoaluminate cement, 46 parts of mineral powder, 1050 parts of coarse aggregate, 726 parts of fine aggregate, 10 parts of water reducer, 0.28 part of retarder, 0.23 part of early strength agent and 161 parts of water. The early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
The initial setting time and the final setting time of the prepared quick-hardening early-strength concrete are respectively 98min and 142min, and the compressive strength for 8h and the compressive strength for 28d are respectively 33.3MPa and 64.5MPa.
Example IV
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 394 parts of sulphoaluminate cement, 45 parts of mineral powder, 11 parts of silica fume, 1020 parts of coarse aggregate, 756 parts of fine aggregate, 9 parts of water reducer, 0.27 part of retarder, 0.27 part of early strength agent and 184 parts of water. The early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
The initial setting time and the final setting time of the prepared quick hardening early strength concrete are 81min and 129min respectively, and the compressive strength of 8h and the compressive strength of 28d are 34.3MPa and 65.7MPa respectively.
The sulphoaluminate cement obtained in the examples 1, 2, 3 and 4 can quickly generate higher strength up to more than 35MPa after being constructed for 8 hours, thereby meeting the requirement of the rush repair and rush construction engineering on the early strength development of the concrete.
Example five
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 420 parts of cementing material, 1010 parts of coarse aggregate, 720 parts of fine aggregate, 8 parts of water reducer, 0.2 part of retarder, 0.2 part of early strength agent and 150 parts of water. The cementing material is one or two mixtures of sulphoaluminate cement, mineral powder and silica fume; the early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
Example six
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 480 parts of cementing material, 1050 parts of coarse aggregate, 770 parts of fine aggregate, 10 parts of water reducer, 0.4 part of retarder, 0.5 part of early strength agent and 200 parts of water. The cementing material is a mixture of sulphoaluminate cement, mineral powder and silica fume; the early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
Example seven
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 420 parts of cementing material, 1050 parts of coarse aggregate, 720 parts of fine aggregate, 10 parts of water reducer, 0.2 part of retarder, 0.5 part of early strength agent and 150 parts of water. The cementing material is sulphoaluminate cement; the early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
Example eight
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 480 parts of cementing material, 1010 parts of coarse aggregate, 770 parts of fine aggregate, 8 parts of water reducer, 0.4 part of retarder, 0.2 part of early strength agent and 200 parts of water. The cementing material is sulphoaluminate cement and mineral powder; the early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
Example nine
The rapid hardening early strength sulphoaluminate cement concrete comprises the following raw materials in parts by weight: 450 parts of cementing material, 1030 parts of coarse aggregate, 740 parts of fine aggregate, 9 parts of water reducer, 0.3 part of retarder, 0.3 part of early strength agent and 170 parts of water. The cementing material is one or two mixtures of sulphoaluminate cement, mineral powder and silica fume; the early strength agent is liquid triethanolamine, the retarder is powdery sodium gluconate, and the water reducer is a polycarboxylic acid high-performance water reducer.
The preparation method of the sulphoaluminate cement quick-hardening early-strength concrete comprises the following steps:
(1) Uniformly dry-mixing sulphoaluminate cement, mineral powder, silica fume and aggregate to obtain a mixture A;
(2) Stirring sodium gluconate powder and water to fully dissolve the sodium gluconate powder to obtain a mixture B;
(3) And adding the mixture B and the polycarboxylic acid high-performance water reducer into the mixture A, and uniformly stirring to obtain the sulphoaluminate cement quick-hardening early-strength concrete.
In the embodiment, the mineral powder is S95 grade, and the specific surface area is more than 480m 2 /kg; siO of the silica fume 2 The content is more than 92 percent, the specific surface area is more than 17000m 2 A/kg, 28d activity index greater than 115%; the concrete prepared by adopting mineral powder and silica fume meeting the above standard has little difference in performance, and can achieve the purpose of the invention.
In the embodiment, the coarse aggregate is formed by mixing crushed stone with the grain diameter of 5-10mm and crushed stone with the grain diameter of 10-20mm according to a certain proportion, and the bulk density is 1500-1600kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The fine aggregate is machine-made sand, and the fineness modulus is 2.3-3.0.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A quick-hardening early-strength sulphoaluminate cement concrete is characterized in that: the raw materials comprise the following components in parts by weight: 420-480 parts of cementing material, 1010-1050 parts of coarse aggregate, 720-770 parts of fine aggregate, 8-10 parts of water reducer, 0.2-0.4 part of retarder, 0.2-0.5 part of early strength agent and 150-200 parts of water.
2. The rapid hardening early strength sulfoaluminate cement concrete according to claim 1, wherein: the raw materials comprise the following components in parts by weight: 450 parts of cementing material, 1030 parts of coarse aggregate, 740 parts of fine aggregate, 9 parts of water reducer, 0.3 part of retarder, 0.3 part of early strength agent and 170 parts of water.
3. The rapid hardening early strength sulfoaluminate cement concrete according to claim 1, wherein: the cementing material at least comprises sulphoaluminate cement.
4. The rapid hardening early strength sulfoaluminate cement concrete according to claim 3, wherein: the cementing material also comprises one or two mixtures of mineral powder and silica fume.
5. The rapid hardening early strength sulfoaluminate cement concrete according to claim 3, wherein: the early strength agent is liquid triethanolamine.
6. The rapid hardening early strength sulfoaluminate cement concrete according to claim 5, wherein: the retarder is powdery sodium gluconate.
7. The rapid hardening early strength sulfoaluminate cement concrete according to claim 6, wherein: the water reducer is a polycarboxylic acid high-performance water reducer.
8. The rapid hardening early strength sulfoaluminate cement concrete according to claim 7, wherein: the mineral powder is S95 grade, and the specific surface area is more than 480m 2 /kg; siO of the silica fume 2 The content is more than 92 percent, the specific surface area is more than 17000m 2 The 28d activity index is greater than 115%.
9. The rapid hardening early strength sulfoaluminate cement concrete according to claim 7, wherein: the coarse aggregate is prepared by mixing crushed stone with the grain diameter of 5-10mm and 10-20mm according to a certain proportion, and the bulk density is 1500-1600kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The fine aggregate is machine-made sand, and the fineness modulus is 2.3-3.0.
10. The method for preparing the rapid hardening and early-strength concrete of the sulphoaluminate cement according to any one of claims 1 to 9, which is characterized by comprising the following steps:
(1) Uniformly dry-mixing sulphoaluminate cement, mineral powder, silica fume and aggregate to obtain a mixture A;
(2) Stirring sodium gluconate powder and water to fully dissolve the sodium gluconate powder to obtain a mixture B;
(3) And adding the mixture B and the polycarboxylic acid high-performance water reducer into the mixture A, and uniformly stirring to obtain the sulphoaluminate cement quick-hardening early-strength concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307858.1A CN117142828A (en) | 2023-03-24 | 2023-03-24 | Quick-hardening early-strength sulphoaluminate cement concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307858.1A CN117142828A (en) | 2023-03-24 | 2023-03-24 | Quick-hardening early-strength sulphoaluminate cement concrete and preparation method thereof |
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|---|---|
| CN117142828A true CN117142828A (en) | 2023-12-01 |
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|---|---|---|---|
| CN202310307858.1A Pending CN117142828A (en) | 2023-03-24 | 2023-03-24 | Quick-hardening early-strength sulphoaluminate cement concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117142828A (en) |
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2023
- 2023-03-24 CN CN202310307858.1A patent/CN117142828A/en active Pending
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