CN115432973A - Low-shrinkage full-hole slag aggregate concrete and preparation method thereof - Google Patents
Low-shrinkage full-hole slag aggregate concrete and preparation method thereof Download PDFInfo
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- CN115432973A CN115432973A CN202211208257.7A CN202211208257A CN115432973A CN 115432973 A CN115432973 A CN 115432973A CN 202211208257 A CN202211208257 A CN 202211208257A CN 115432973 A CN115432973 A CN 115432973A
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- 239000002893 slag Substances 0.000 title claims abstract description 83
- 239000004567 concrete Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000010881 fly ash Substances 0.000 claims abstract description 20
- 239000011398 Portland cement Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
- 239000004575 stone Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- RNIHAPSVIGPAFF-UHFFFAOYSA-N Acrylamide-acrylic acid resin Chemical group NC(=O)C=C.OC(=O)C=C RNIHAPSVIGPAFF-UHFFFAOYSA-N 0.000 claims description 7
- 229920006322 acrylamide copolymer Polymers 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical group [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011268 mixed slurry Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008961 swelling 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
- C04B28/04—Portland 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/343—Crack resistant materials
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses low-shrinkage full-hole slag aggregate concrete, which comprises 750-800 parts of ordinary portland cement, 200-250 parts of fly ash, 2200-2400 parts of hole slag coarse aggregate, 1500-1600 parts of hole slag fine aggregate, 0.3-0.4 part of internal curing agent, 20-80 parts of expanding agent, 30-50 parts of water reducing agent and 350-400 parts of water. The invention also discloses a preparation method of the low-shrinkage full-hole slag aggregate concrete. Based on the composite compensation shrinkage effect of the internal curing agent and the calcium oxide expanding agent, the prepared low-shrinkage full-hole slag aggregate concrete has the characteristics of high compression resistance, low shrinkage and high durability, the shrinkage cracking risk of the full-hole slag aggregate concrete is reduced, and the service life of the concrete is prolonged.
Description
Technical Field
The invention relates to the technical field of building material preparation, in particular to low-shrinkage full-hole slag aggregate concrete and a preparation method thereof.
Background
The rapid development of infrastructure construction continuously increases the demand of concrete materials, and simultaneously puts higher requirements on the performance of concrete, the traditional concrete takes natural aggregates such as river sand as main fine aggregates, and the excessive exploitation of the natural aggregates brings a series of problems such as resource shortage and environmental damage. The tunnel slag is a byproduct generated in tunnel blasting and excavation processes, and the tunnel slag is fully utilized to prepare concrete, so that resources can be saved, the environment is protected, and the engineering construction cost is saved.
However, the hole slag contains more stone powder, and the grading has the characteristics of large two ends and small middle, so that the shrinkage of the hole slag aggregate concrete is large; and the concrete pouring amount is large in tunnel construction, and the concrete has large temperature shrinkage. This causes the whole-tunnel slag aggregate concrete to have a large risk of shrinkage cracking in the service process, and seriously jeopardizes the structure safety. The conventional concrete shrinkage regulation and control modes comprise compensation shrinkage regulation and control and internal maintenance regulation and control, wherein the compensation shrinkage regulation and control mode is to add an expanding agent into the concrete, and generate volume expansion through hydration crystallization of the expanding agent so as to offset the shrinkage of part of concrete, but the compensation shrinkage has the problem that the expanding agent is difficult to fully hydrate; the internal curing means that an internal curing material is added into concrete, and the internal of the concrete keeps higher relative humidity through the water absorbing and releasing functions of the internal curing material, so that the hydration of cement is promoted, the compactness of the concrete is increased, and the shrinkage value of the concrete is reduced.
The respective defects can be counteracted by using the expanding agent and the internal curing material in a composite way, and the effect of' 1+1> < 2 > is realized. On one hand, the continuous water release of the internal curing agent in the concrete can keep the relative humidity in the concrete, promote the full hydration of the expanding agent, reduce the self-drying shrinkage of the concrete and the like; on the other hand, crystalline hydration products generated after the swelling agent is hydrated can reduce the porosity of the concrete and improve the compressive strength and the elastic modulus of the concrete. The shrinkage deformation of the full-hole slag aggregate concrete can be effectively reduced by the combined use of the internal curing and the expanding agent, and the mechanics and durability of the full-hole slag aggregate concrete are improved.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide low-shrinkage full-hole slag aggregate concrete, which can solve the problems of large shrinkage and easy cracking of the full-hole slag aggregate concrete in the service process.
The second purpose of the invention is to provide a preparation method of the low-shrinkage full-hole slag aggregate concrete.
The technical scheme is as follows: the low-shrinkage full-hole slag aggregate concrete comprises the following raw materials in parts by mass: 750-800 parts of ordinary portland cement, 200-250 parts of fly ash, 2200-2400 parts of hole slag coarse aggregate, 1500-1600 parts of hole slag fine aggregate, 0.3-0.4 part of internal curing agent, 20-80 parts of expanding agent, 30-50 parts of water reducing agent and 350-400 parts of water.
Preferably, the coarse aggregate of the cave slag is crushed stone with the particle size of 5-20 mm, and the apparent density value is 2.955g/cm 3 The crush index was 8%.
Preferably, the hole slag fine aggregate is broken stone particles with the particle size of 0.01-5 mm, the fineness modulus of the broken stone particles is 2.8, and the bulk density of the broken stone particles is 1.61-1.80 g/cm 3 The water absorption rate is 0.8%, the chloride ion content is 0.001418%, and the stone powder content is 7%.
Preferably, the ordinary portland cement is P · O42.5-grade portland cement.
Preferably, the fly ash is of a spherical structure, the CaO content of the fly ash is 18%, and Al content of the fly ash is 2 O 3 The content is 6.8 percent and SiO 2 65% in content and an apparent density of 2.24g/cm 3 Specific surface area of 454m 2 /kg。
Preferably, the internal curing agent is acrylic acid-acrylamide copolymer with fineness of 80-100 meshes and the highest water absorption rate of 150 times of the self-mass.
Preferably, the expanding agent is a calcium-sulfur type expanding agent, the CaO content of the expanding agent is 56.1 percent, and the SO content of the expanding agent is 3 The content was 19.03%.
Preferably, the water reducing agent is a polycarboxylate water reducing agent, the solid content of the water reducing agent is 40%, and the water reducing rate is more than 35%.
A preparation method of low-shrinkage full-hole slag aggregate concrete comprises the following steps:
(1) Adding the ordinary portland cement and the fly ash into a concrete mixer, and stirring to obtain a uniformly mixed cementing material;
(2) Adding water into the cementing material obtained in the step (1) and continuously stirring to obtain fully mixed slurry;
(3) Pre-absorbing water by using an internal curing agent acrylic acid-acrylamide copolymer, adding the water-absorbed internal curing agent acrylic acid-acrylamide copolymer and an expanding agent into the slurry obtained in the step (2) together, and uniformly stirring to obtain a mixture;
(4) Slowly adding the hole slag fine aggregate into the mixture obtained in the step (3) and uniformly stirring to obtain hole slag aggregate mortar;
(5) Slowly adding the hole slag coarse aggregate into the hole slag aggregate mortar in the step (4) and uniformly stirring to obtain full-hole slag aggregate concrete;
(6) And (3) dissolving a water reducing agent in water to obtain a water reducing agent solution, adding the water reducing agent solution into the full-hole slag aggregate concrete obtained in the step (5), uniformly stirring, and forming and curing to obtain the concrete.
Preferably, the concrete mixer is a forced mixer, and the rotating speed is 100-110 r/min.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: (1) The tunnel slag is used for replacing river sand and broken stone, so that excessive mining of natural aggregate is reduced; (2) By regulating and controlling the compound mixing proportion of the internal curing material and the expanding agent, the early self-shrinkage value and the long-term total shrinkage value of the full-tunnel slag aggregate concrete are effectively reduced, the risk of shrinkage cracking is reduced, and the mechanical property and the durability are improved.
Detailed Description
The technical solution of the present invention is further explained below.
Example 1
1. The following materials are prepared according to the parts by mass:
750 parts of P.O 42.5 ordinary portland cement, 250 parts of fly ash, 2200 parts of hole slag coarse aggregate, 1500 parts of hole slag fine aggregate, 20 parts of expanding agent, 0.3 part of internal curing agent, 30 parts of water reducing agent and 350 parts of water.
The fly ash is of a spherical structure, the CaO content of the fly ash is 18 percent, and the Al content of the fly ash is 2 O 3 The content is 6.8 percent and SiO 2 65% in content and an apparent density of 2.24g/cm 3 A specific surface area of 454m 2 /kg。
The coarse aggregate of the cave slag is broken stone with the grain diameter of 5-20 mm, and the apparent density value is 2.955g/cm 3 The crush index was 8%.
The hole slag fine aggregate is broken stone particles with the particle size of 0.01-5 mm, the fineness modulus is 2.8, and the bulk density is 1.61-1.80 g/cm 3 The water absorption rate is 0.8%, the chloride ion content is 0.001418%, and the stone powder content is 7%.
The expanding agent is calcium-sulfur type expanding agent, the CaO content of the expanding agent is 56.1 percent, and the SO content is 3 The content was 19.03%.
The internal curing agent is acrylic acid-acrylamide copolymer with fineness of 80-100 meshes and the highest water absorption multiplying power of 150 times of the self-weight.
The water reducing agent is a polycarboxylic acid water reducing agent, the solid content of the water reducing agent is 40%, and the water reducing rate is more than 35%.
2. The preparation method of the low-shrinkage full-hole slag aggregate concrete comprises the following steps:
(1) Adding the P.O 42.5 ordinary portland cement and fly ash into a concrete mixer, and stirring for 60s at the rotating speed of 100r/min to obtain a uniformly mixed cementing material;
(2) Adding water into the cementing material obtained in the step (1), and stirring for 60s at the rotating speed of 100r/min to obtain fully mixed slurry;
(3) And (3) pre-absorbing 25 times of water by mass of the acrylic acid-acrylamide copolymer, adding the acrylic acid-acrylamide copolymer after water absorption and a calcium-sulfur type expanding agent into the slurry obtained in the step (2), and stirring for 60s at the rotating speed of 100r/min to obtain a mixture.
(4) Slowly adding the hole slag fine aggregate into the mixture obtained in the step (3), and stirring for 60s at the rotating speed of 100r/min to obtain hole slag aggregate mortar;
(5) Slowly adding the hole slag coarse aggregate into the hole slag aggregate mortar in the step (4), uniformly stirring, and stirring for 60s at the rotating speed of 100r/min to obtain full-hole slag aggregate concrete;
(6) And (3) adding a polycarboxylic acid water reducing agent into water to dissolve, adding the polycarboxylic acid water reducing agent into the full-hole slag aggregate concrete obtained in the step (5), and forming and curing to obtain the concrete.
Example 2
The low-shrinkage full-tunnel slag aggregate concrete comprises the following raw materials in parts by mass:
775 parts of P & O42.5 ordinary portland cement, 225 parts of fly ash, 2300 parts of hole slag coarse aggregate, 1550 parts of hole slag fine aggregate, 60 parts of expanding agent, 0.35 part of internal curing, 40 parts of water reducer and 375 parts of water.
During preparation, the mixture is stirred at the rotating speed of 105r/min, and other materials and preparation methods are consistent with those of the example 1.
Example 3
The low-shrinkage full-tunnel slag aggregate concrete comprises the following raw materials in parts by mass:
800 parts of P.O 42.5 ordinary portland cement, 200 parts of fly ash, 2400 parts of hole slag coarse aggregate, 1600 parts of hole slag fine aggregate, 80 parts of expanding agent, 0.4 part of internal curing agent, 50 parts of water reducing agent and 400 parts of water.
During preparation, the mixture is stirred at the rotating speed of 110r/min, and other materials and preparation methods are consistent with those of the example 1.
Comparative example 1
The low-shrinkage full-tunnel slag aggregate concrete comprises the following raw materials in parts by mass:
750 parts of P.O 42.5 ordinary portland cement, 250 parts of fly ash, 2200 parts of hole slag coarse aggregate, 1500 parts of hole slag fine aggregate, 30 parts of water reducing agent and 350 parts of water, and no internal curing agent or expanding agent is added.
Other materials and preparation methods were the same as in example 1.
Comparative example 2
The low-shrinkage full-tunnel slag aggregate concrete comprises the following raw materials in parts by mass:
750 parts of P.O 42.5 ordinary portland cement, 250 parts of fly ash, 2200 parts of hole slag coarse aggregate, 1500 parts of hole slag fine aggregate, 0.3 part of internal curing agent, 30 parts of water reducing agent and 350 parts of water, and no expanding agent is added.
Other materials and preparation methods were the same as in example 1.
Comparative example 3
The low-shrinkage full-tunnel slag aggregate concrete comprises the following raw materials in parts by mass:
750 parts of P.O 42.5 ordinary portland cement, 250 parts of fly ash, 2200 parts of hole slag coarse aggregate, 1500 parts of hole slag fine aggregate, 20 parts of expanding agent, 30 parts of water reducing agent and 350 parts of water, and no internal curing agent is added.
Other materials and preparation methods were the same as those in example 1.
Comparative example 4
In order to compare with the concrete with the hole slag aggregate, river sand is used as a fine aggregate, basalt stone is used as a coarse aggregate to prepare the common concrete, and the common concrete comprises the following raw materials in parts by mass:
750 parts of P.O 42.5 ordinary portland cement, 250 parts of fly ash, 2200 parts of basalt stone, 1500 parts of river sand, 20 parts of expanding agent, 0.3 part of internal curing agent, 30 parts of water reducing agent and 350 parts of water.
Other materials and preparation methods were the same as in example 1.
The concrete of examples 1 to 3 and comparative examples 1 to 4 were tested for 28d compressive strength, 7 day self-shrinkage value, and 56d total shrinkage value, and the test results are shown in Table 1.
TABLE 1
From table 1, it can be seen that the 28d compressive strength of the concrete in examples 1-3 is improved to a certain extent compared with the concrete in comparative example 1, and the 7d self-shrinkage value and the 56d total shrinkage value are both greatly reduced compared with the comparative example, which indicates that the shrinkage control method based on the composite action of the internal curing and the expanding agent can effectively reduce the shrinkage value of the concrete with the full-hole slag aggregate and reduce the risk of shrinkage cracking. As can be seen by comparing examples 1-3 with comparative example 4, the compressive strength and the shrinkage value of the hole slag aggregate concrete are superior to those of common concrete, which shows that the preparation of low-shrinkage high-strength concrete by using the tunnel hole slag has feasibility.
Claims (10)
1. The low-shrinkage full-tunnel slag aggregate concrete is characterized by comprising the following raw materials in parts by mass: 750-800 parts of ordinary portland cement, 200-250 parts of fly ash, 2200-2400 parts of hole slag coarse aggregate, 1500-1600 parts of hole slag fine aggregate, 0.3-0.4 part of internal curing agent, 20-80 parts of expanding agent, 30-50 parts of water reducing agent and 350-400 parts of water.
2. The low-shrinkage full-hole slag aggregate concrete as claimed in claim 1, wherein the hole slag coarse aggregate is broken stone with a particle size of 5-20 mm.
3. The low-shrinkage full-hole slag aggregate concrete as claimed in claim 1, wherein the hole slag fine aggregate is broken stone with a particle size of 0.01-5 mm.
4. The low shrinkage full-hole slag aggregate concrete according to claim 1, wherein the ordinary portland cement is P-O42.5 grade portland cement.
5. The low shrinkage full-hole slag aggregate concrete according to claim 1, wherein the fly ash is of a spherical structure.
6. The low-shrinkage full-hole slag aggregate concrete as claimed in claim 1, wherein the internal curing agent is an acrylic acid-acrylamide copolymer.
7. The low shrinkage full-hole slag aggregate concrete according to claim 1, wherein the expanding agent is a calcium-sulfur type expanding agent.
8. The low-shrinkage full-hole slag aggregate concrete as claimed in claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent.
9. The preparation method of the low-shrinkage full-hole slag aggregate concrete as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps:
(1) Adding the ordinary portland cement and the fly ash into a concrete mixer, and stirring to obtain a uniformly mixed cementing material;
(2) Adding water into the cementing material obtained in the step (1) and continuously stirring to obtain fully mixed slurry;
(3) Pre-absorbing water by using an internal curing agent, adding the water-absorbed internal curing agent and an expanding agent into the slurry obtained in the step (2) and uniformly stirring to obtain a mixture;
(4) Slowly adding the hole slag fine aggregate into the mixture obtained in the step (3) and uniformly stirring to obtain hole slag aggregate mortar;
(5) Slowly adding the hole slag coarse aggregate into the hole slag aggregate mortar in the step (4) and uniformly stirring to obtain full-hole slag aggregate concrete;
(6) And (3) dissolving a water reducing agent in water to obtain a water reducing agent solution, adding the water reducing agent solution into the full-hole slag aggregate concrete obtained in the step (5), uniformly stirring, and forming and curing to obtain the concrete.
10. The method for preparing the low-shrinkage full-hole slag aggregate concrete according to claim 9, wherein the concrete mixer is a forced mixer, and the rotating speed is 100-110 r/min.
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| CN202211208257.7A CN115432973A (en) | 2022-09-30 | 2022-09-30 | Low-shrinkage full-hole slag aggregate concrete and preparation method thereof |
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| CN202211208257.7A CN115432973A (en) | 2022-09-30 | 2022-09-30 | Low-shrinkage full-hole slag aggregate concrete and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133803A (en) * | 2018-10-16 | 2019-01-04 | 成都宏基建材股份有限公司 | A kind of C40 ordinary portland cement base radiation shield concrete and preparation method thereof |
| CN110950603A (en) * | 2019-12-17 | 2020-04-03 | 中建商品混凝土有限公司 | High-strength anti-crack concrete and preparation method thereof |
| CN112521089A (en) * | 2020-12-07 | 2021-03-19 | 东南大学 | Full-hole slag high-performance concrete and preparation method thereof |
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2022
- 2022-09-30 CN CN202211208257.7A patent/CN115432973A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133803A (en) * | 2018-10-16 | 2019-01-04 | 成都宏基建材股份有限公司 | A kind of C40 ordinary portland cement base radiation shield concrete and preparation method thereof |
| CN110950603A (en) * | 2019-12-17 | 2020-04-03 | 中建商品混凝土有限公司 | High-strength anti-crack concrete and preparation method thereof |
| CN112521089A (en) * | 2020-12-07 | 2021-03-19 | 东南大学 | Full-hole slag high-performance concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 马新伟等, 哈尔滨工业大学出版社 * |
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Application publication date: 20221206 |