CN113698150A - Large-volume concrete and preparation method thereof - Google Patents

Large-volume concrete and preparation method thereof Download PDF

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Publication number
CN113698150A
CN113698150A CN202110964508.3A CN202110964508A CN113698150A CN 113698150 A CN113698150 A CN 113698150A CN 202110964508 A CN202110964508 A CN 202110964508A CN 113698150 A CN113698150 A CN 113698150A
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parts
concrete
vermiculite
halloysite
cement
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咸立军
刘博�
周美山
魏绍红
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Shandong Baina Concrete Co ltd
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Shandong Baina Concrete Co ltd
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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
    • C04B28/04—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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/20—Mica; Vermiculite
    • C04B14/202—Vermiculite
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/14—Peptides; Proteins; Derivatives thereof
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2664—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of ethylenically unsaturated dicarboxylic acid polymers, e.g. maleic anhydride copolymers
    • 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
    • C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The application relates to the field of building materials, and particularly discloses a large-volume concrete and a preparation method thereof. The mass concrete comprises the following raw materials in parts by weight: 550 parts of cement 470-550 parts, 850 parts of artificial sand 814-850 parts, 890-950 parts of stones, 190 parts of drinking water 130-560 parts and 560 parts of water storage agent 240-560 parts, wherein the water storage agent comprises vermiculite, halloysite and maleic acid, and the weight ratio of the vermiculite to the halloysite to the maleic acid is (2-3): (3-4): 1; the application of bulky concrete has the advantages of reducing the cracking of bulky concrete buildings, reducing the generation of cracks and improving the quality of buildings.

Description

Large-volume concrete and preparation method thereof
Technical Field
The present application relates to the field of building materials, and more particularly, it relates to a mass concrete and a method for preparing the same.
Background
Mass concrete with concrete structure body minimum geometric dimension not less than 1m, or concrete which is expected to cause harmful crack generation due to temperature change and shrinkage caused by hydration of cementing material in concrete, is called large volume concrete.
In modern buildings, large-volume concrete construction is often involved, such as high-rise building foundations, large equipment foundations, water conservancy dams and the like. It is mainly characterized by large volume, and the size of any direction of the minimum section is at least 1 m. Its surface coefficient is smaller, the cement hydration heat release is more concentrated, and its internal temp. rise is faster. When the temperature difference between the inside and the outside of the concrete is large, the concrete can generate temperature cracks, and the structural safety and normal use are influenced.
In view of the above-mentioned related art, the inventors believe that, in the north and in windy winter, the surface of a building cast with large-volume concrete is dehydrated to cause drying shrinkage cracking, and further induce the large-volume concrete cracks to expand from the cracked portions, thereby reducing the quality of the building.
Disclosure of Invention
In order to reduce the cracking of mass concrete buildings, reduce the generation of cracks and improve the quality of the buildings, the application provides mass concrete and a preparation method thereof.
In a first aspect, the present application provides a bulk concrete.
The mass concrete comprises the following raw materials in parts by weight: 550 parts of cement 470-550 parts, 850 parts of artificial sand 814-850 parts, 890-950 parts of stones, 190 parts of drinking water 130-560 parts and 560 parts of water storage agent 240-560 parts, wherein the water storage agent comprises vermiculite, halloysite and maleic acid, and the weight ratio of the vermiculite to the halloysite to the maleic acid is (2-3): (3-4): 1.
through adopting above-mentioned technical scheme, vermiculite and halloysite can absorb water and store, halloysite fills the vermiculite clearance, maleic acid is modified vermiculite and halloysite, thereby improve the water retention property of vermiculite and halloysite, when bulky concrete hydration reaction intensifies, water in the vermiculite distributes to all around, thereby provide moisture to bulky concrete, the moisture that part vermiculite gived off is absorbed to halloysite this moment, when moisture is not many in the vermiculite, moisture in the halloysite gets into in the bulky concrete, thereby the realization lasts for bulky concrete water supply, reduce the condition that bulky concrete building cracked, improve building quality.
Preferably, the protective agent also comprises 40-80 parts, and the protective agent comprises sericin.
By adopting the technical scheme, sericin plays a role in protecting vermiculite and halloysite, so that water in the vermiculite and the halloysite is slowly released by continuous degradation of sericin, and the water replenishing time of the water storage agent on mass concrete is prolonged.
Preferably, the protective agent further comprises a cross-linking agent, and the weight ratio of the cross-linking agent to the sericin is 1: 3.
by adopting the technical scheme, the cross-linking agent improves the polymerization degree of the maleic acid, further improves the modification effect of the maleic acid on the vermiculite and the halloysite, and effectively improves the water retention performance of the vermiculite and the halloysite.
Preferably, the weight ratio of the water storage agent to the protective agent is 5.5: 1.
by adopting the technical scheme, the adding proportion of the water storage agent and the protective agent is limited, so that the protective effect of the protective agent on the water storage agent is further improved, and the water replenishing time of the water storage agent on mass concrete is prolonged.
Preferably, the concrete water-based concrete further comprises a retarding additive, wherein the addition amount of the retarding additive is 3% -5% of the total weight of cement, artificial sand, stones and drinking water.
By adopting the technical scheme, the retarder improves the setting time of the mass concrete, thereby prolonging the conveying time of the mass concrete.
Preferably, the stones are of continuous gradation.
By adopting the technical scheme, the stability of each raw material in the mass concrete is improved, the density of the mass concrete is improved, and the damage of external influence factors to the mass concrete is reduced.
In a second aspect, the present application provides a method of making a bulk concrete.
A preparation method of mass concrete comprises the following steps: mixing and stirring drinking water, sericin and a cross-linking agent uniformly, adding the cross-linking agent, mixing and stirring uniformly, adding cement, artificial sand, pebbles, vermiculite, halloysite and maleic acid, mixing and stirring uniformly to obtain the large-volume concrete.
By adopting the technical scheme, the sericin is mixed with the drinking water and then is mixed with other raw materials, so that the dispersion uniformity of the sericin and the cross-linking agent in the mass concrete is improved.
Preferably, the method comprises the following steps: the drinking water, the sericin and the cross-linking agent are mixed and stirred uniformly, then the cross-linking agent is added and mixed and stirred uniformly, and then the cement, the artificial sand, the pebble, the vermiculite, the halloysite, the maleic acid and the retarding admixture are added and mixed and stirred uniformly to prepare the mass concrete.
By adopting the technical scheme, the setting time of the mass concrete is prolonged by adding the retarder into the mass concrete, so that the transportation time and the transportation range of the mass concrete are improved.
In summary, the present application has the following beneficial effects:
1. this application adopts vermiculite and halloysite to mix and makes the halloysite fill the back with the vermiculite clearance, and the maleic acid polymerization in-process is modified vermiculite and halloysite to make absorbent vermiculite and halloysite water retention property promote, and then continuously to bulky concrete moisturizing, reduce bulky concrete crack and produce.
2. Sericin plays a role in protecting vermiculite and halloysite, and the protection effect on the vermiculite and the halloysite is reduced along with sericin degradation, so that moisture in the vermiculite and the halloysite is slowly emitted, and the water replenishing time of mass concrete is prolonged.
3. The method can realize the production of the large-volume concrete through simple mixing, and is simple and convenient to operate.
Detailed Description
The cement is P.II 42.5 cement, the particle size of artificial sand is 1-5mm, the particle size of pebble is continuous gradation particle size is 5-25mm, vermiculite, halloysite, maleic acid, cross-linking agent N, N-methylene bisacrylamide and sericin are all purchased from the market.
The present application will be described in further detail with reference to examples.
Preparation example
Preparation example 1
Weighing 200kg of vermiculite, 300kg of halloysite and 100kg of maleic acid, and uniformly mixing and stirring to obtain the water storage agent.
Preparation example 2
200kg of vermiculite, 350kg of halloysite and 100kg of maleic acid are weighed, mixed and stirred uniformly to prepare the water storage agent.
Preparation example 3
Weighing 200kg of vermiculite, 400kg of halloysite and 100kg of maleic acid, and uniformly mixing and stirring to obtain the water storage agent.
Preparation example 4
250kg of vermiculite, 300kg of halloysite and 100kg of maleic acid are weighed, mixed and stirred uniformly to prepare the water storage agent.
Preparation example 5
250kg of vermiculite, 350kg of halloysite and 100kg of maleic acid are weighed, mixed and stirred uniformly to prepare the water storage agent.
Preparation example 6
250kg of vermiculite, 400kg of halloysite and 100kg of maleic acid are weighed, mixed and stirred uniformly to prepare the water storage agent.
Preparation example 7
Weighing 300kg of vermiculite, 300kg of halloysite and 100kg of maleic acid, mixing and stirring uniformly to obtain the water storage agent.
Preparation example 8
300kg of vermiculite, 350kg of halloysite and 100kg of maleic acid are weighed, mixed and stirred uniformly to prepare the water storage agent.
Preparation example 9
Weighing 300kg of vermiculite, 400kg of halloysite and 100kg of maleic acid, mixing and stirring uniformly to obtain the water storage agent.
Examples
Example 1
130kg of drinking water, 470kg of cement, 814kg of artificial sand, 890kg of stones and 240kg of the water storage agent prepared in the preparation example 1 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 2
130kg of drinking water, 470kg of cement, 814kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 3
130kg of drinking water, 510kg of cement, 814kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 4
130kg of drinking water, 550kg of cement, 814kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 5
130kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 6
130kg of drinking water, 510kg of cement, 850kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 7
130kg of drinking water, 510kg of cement, 832kg of artificial sand, 920kg of stones and 385kg of the water storage agent prepared in the preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 8
130kg of drinking water, 510kg of cement, 832kg of artificial sand, 950kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 9
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 10
190kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 11
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in the preparation example 1 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 12
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 2 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 13
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 3 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 14
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 4 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 15
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 6 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 16
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 7 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 17
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 8 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 18
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 9 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 19
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 240kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 20
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 560kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 21
160kg of drinking water and 30kg of sericin are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the mass concrete.
Example 22
160kg of drinking water and 40kg of sericin are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the mass concrete.
Example 23
160kg of drinking water and 60kg of sericin are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of stones and 385kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the mass concrete.
Example 24
160kg of drinking water, 40kg of sericin and 10kg of cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles and 385kg of water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 25
160kg of drinking water, 40kg of sericin and 15kg of cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles and 385kg of water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 26
160kg of drinking water, 40kg of sericin and 20kg of cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles and 385kg of water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 27
160kg of drinking water, 40kg of sericin and 15kg of a cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles, 385kg of the water storage agent prepared in the preparation example 5 and 86kg of a retarding additive are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 28
160kg of drinking water, 40kg of sericin and 15kg of a cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles, 385kg of the water storage agent prepared in the preparation example 5 and 114kg of a retarding additive are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 29
160kg of drinking water, 40kg of sericin and 15kg of a cross-linking agent are weighed, stirred and mixed uniformly, and then 510kg of cement, 832kg of artificial sand, 890kg of pebbles, 385kg of the water storage agent prepared in the preparation example 5 and 143kg of a retarding additive are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Example 30
190kg of drinking water, 550kg of cement, 850kg of artificial sand, 950kg of stones and 560kg of the water storage agent prepared in preparation example 9 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example
Comparative example 1
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones, 135kg of vermiculite and 180kg of halloysite are weighed, stirred and mixed uniformly to obtain the large-volume concrete.
Comparative example 2
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones, 135kg of vermiculite and 55kg of maleic acid are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 3
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones, 55kg of maleic acid and 180kg of halloysite are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 4
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 135kg of vermiculite are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 5
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 180kg of halloysite are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 6
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 55kg of maleic acid are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 7
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 100kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Comparative example 8
160kg of drinking water, 510kg of cement, 832kg of artificial sand, 890kg of stones and 700kg of the water storage agent prepared in preparation example 5 are weighed, stirred and mixed uniformly to prepare the large-volume concrete.
Performance test
The following property tests were carried out on the concretes obtained in examples 1 to 30 and comparative examples 1 to 8.
And (3) early anti-cracking performance, namely making a standard test block according to GB/T50081-2016 standard on mechanical property test method of common concrete, and measuring to obtain the number of cracks in unit area and the total cracking area in unit area after concrete pouring is carried out for 24 hours.
Table 1 table of performance testing data
Figure BDA0003223540570000081
By combining examples 2-10 and table 1, it can be seen that the performance of the mass concrete can be effectively improved and the cracking of the mass concrete can be effectively reduced by selecting a proper proportion of cement, artificial sand, gravel and drinking water.
It can be seen by combining examples 9 and 11 to 18 and by combining table 1 that the water retention performance of the water storage agent can be effectively improved by selecting a proper proportion of vermiculite, halloysite and maleic acid, so that the water can be continuously supplemented to the mass concrete, and the cracking of the mass concrete can be reduced.
It can be seen from the combination of example 9 and examples 21 to 23 and the combination of table 1 that the cracking of the mass concrete is obviously reduced after the sericin is added, because sericin protects vermiculite and halloysite, the protection of the vermiculite and halloysite is reduced along with the degradation of sericin, so that the moisture in the vermiculite and halloysite is slowly released, the mass concrete is continuously supplemented with water, and the cracking of the mass concrete is reduced.
It can be seen from the combination of the examples 22 and 24 to 26 and the table 1 that the cracking of the mass concrete is further reduced after the cross-linking agent is added, and the polymerization degree of the maleic acid is improved by the cross-linking agent, so that the modification effect of the maleic acid on the vermiculite and the halloysite is improved, and the water retention performance of the vermiculite and the halloysite is effectively improved.
It can be seen from the combination of example 9, comparative examples 1 to 6 and table 1 that halloysite fills gaps between vermiculite, vermiculite and halloysite are modified by maleic acid after the vermiculite and halloysite absorb water and are stored, so that the water retention performance of the vermiculite and halloysite is improved, when the hydration reaction of mass concrete is heated, water in the vermiculite is emitted to the periphery, so that water is provided for the mass concrete, the halloysite absorbs part of water emitted by the vermiculite, and when the water in the vermiculite is not much, the water in the halloysite enters the mass concrete, so that water is continuously supplied for the mass concrete, and the cracking of the mass concrete building is reduced.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (8)

1. The mass concrete is characterized by comprising the following raw materials in parts by weight: 550 parts of cement 470-550 parts, 850 parts of artificial sand 814-850 parts, 890-950 parts of stones, 190 parts of drinking water 130-560 parts and 560 parts of water storage agent 240-560 parts, wherein the water storage agent comprises vermiculite, halloysite and maleic acid, and the weight ratio of the vermiculite to the halloysite to the maleic acid is (2-3): (3-4): 1.
2. the mass concrete according to claim 1, further comprising 40-80 parts of a protective agent, wherein the protective agent comprises sericin.
3. The mass concrete of claim 2, wherein the protective agent further comprises a cross-linking agent, and the weight ratio of the cross-linking agent to the sericin is 1: 3.
4. a bulk concrete according to claim 3, wherein the weight ratio of the water-storing agent to the protective agent is 5.5: 1.
5. the mass concrete of claim 1, further comprising a set retarding admixture, wherein the set retarding admixture is added in an amount of 3% to 5% by weight based on the total weight of cement, artificial sand, gravel and drinking water.
6. A mass concrete according to claim 1, wherein said stones are graded in series.
7. The method for preparing mass concrete according to claim 4, comprising the steps of: mixing and stirring drinking water, sericin and a cross-linking agent uniformly, adding the cross-linking agent, mixing and stirring uniformly, adding cement, artificial sand, pebbles, vermiculite, halloysite and maleic acid, mixing and stirring uniformly to obtain the large-volume concrete.
8. A method of making a mass concrete according to claims 5-6, comprising the steps of: the drinking water, the sericin and the cross-linking agent are mixed and stirred uniformly, then the cross-linking agent is added and mixed and stirred uniformly, and then the cement, the artificial sand, the pebble, the vermiculite, the halloysite, the maleic acid and the retarding admixture are added and mixed and stirred uniformly to prepare the mass concrete.
CN202110964508.3A 2021-08-23 2021-08-23 Large-volume concrete and preparation method thereof Pending CN113698150A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023137517A1 (en) * 2022-01-21 2023-07-27 Andromeda IP Pty Ltd Cementitious material additive

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3188866U (en) * 2013-11-28 2014-02-13 株式会社キーズファクトリー Screen protector for portable game consoles
CN110467407A (en) * 2019-09-23 2019-11-19 陕西秦汉恒盛新型建材科技股份有限公司 A kind of C70 mass concrete and its preparation process
CN112225484A (en) * 2020-10-14 2021-01-15 中交武汉港湾工程设计研究院有限公司 Zeolite carrier concrete internal curing agent and preparation method and application thereof
CN112537930A (en) * 2020-12-08 2021-03-23 廊坊市泽龙混凝土有限公司 Ultrahigh-strength concrete and preparation method thereof
CN113264727A (en) * 2021-05-07 2021-08-17 襄阳嘉众和建材实业有限公司 Large-volume concrete and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3188866U (en) * 2013-11-28 2014-02-13 株式会社キーズファクトリー Screen protector for portable game consoles
CN110467407A (en) * 2019-09-23 2019-11-19 陕西秦汉恒盛新型建材科技股份有限公司 A kind of C70 mass concrete and its preparation process
CN112225484A (en) * 2020-10-14 2021-01-15 中交武汉港湾工程设计研究院有限公司 Zeolite carrier concrete internal curing agent and preparation method and application thereof
CN112537930A (en) * 2020-12-08 2021-03-23 廊坊市泽龙混凝土有限公司 Ultrahigh-strength concrete and preparation method thereof
CN113264727A (en) * 2021-05-07 2021-08-17 襄阳嘉众和建材实业有限公司 Large-volume concrete and preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
宓永宁: "《建筑材料》", 31 August 2006, 中国农业出版社 *
张彬: "《混凝土外加剂及其应用手册》", 30 November 2012, 天津大学出版社 *
潘旺林: "《最新建筑材料手册》", 30 April 2014, 安徽科学技术出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023137517A1 (en) * 2022-01-21 2023-07-27 Andromeda IP Pty Ltd Cementitious material additive

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