CN116675476A - Permeable concrete and preparation method thereof - Google Patents

Permeable concrete and preparation method thereof Download PDF

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Publication number
CN116675476A
CN116675476A CN202310726642.9A CN202310726642A CN116675476A CN 116675476 A CN116675476 A CN 116675476A CN 202310726642 A CN202310726642 A CN 202310726642A CN 116675476 A CN116675476 A CN 116675476A
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parts
pervious concrete
water
concrete
cellulose
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彭燕勇
鲜长春
刁磊
刘涛
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Sichuan Baihui Concrete Engineering Co ltd
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Sichuan Baihui Concrete Engineering 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
    • 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
    • C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
    • C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
    • 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
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/283—Polyesters
    • 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
    • C04B24/38—Polysaccharides or derivatives thereof
    • C04B24/383—Cellulose or 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
    • C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
    • C04B24/42—Organo-silicon compounds
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00284—Materials permeable to liquids
    • 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
    • C04B2111/40—Porous or lightweight 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/76—Use at unusual temperatures, e.g. sub-zero
    • 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

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

Abstract

The application relates to the technical field of building materials, in particular to permeable concrete and a preparation method thereof. The permeable concrete consists of the following raw materials in parts by weight: 100-125 parts of water, 270-300 parts of cement, 1300-1500 parts of coarse aggregate, 8-15 parts of water reducer, 15-40 parts of single-end hydroxyl silicone oil, 25-50 parts of tannic acid and 50-80 parts of amphiphilic cellulose. The permeable concrete prepared by the application has good compression resistance and freeze thawing resistance.

Description

Permeable concrete and preparation method thereof
Technical Field
The application relates to the technical field of building materials, in particular to permeable concrete and a preparation method thereof.
Background
In recent years, urban construction in China develops very rapidly, and the urban process is continuously accelerated. The concrete pavement is taken as an important link of urban development, is beneficial to traffic and transportation, and can accelerate the development of economy and society. However, with the continuous acceleration of the urban process, environmental problems are continuously aggravated, and in order to improve the living environment of people, china proposes the idea of building a sponge city, and the most important ring of building the sponge city is the use of permeable concrete.
The permeable concrete is a concrete which is not doped with or doped with a small amount of fine aggregate, and aims to form a through hole so that water can be rapidly discharged through the concrete without forming ponding, so that urban waterlogging is effectively relieved, rainwater can infiltrate into soil downwards, and a very positive effect is achieved on supplementing groundwater resources. And due to the existence of pores in the concrete, the noise can be well absorbed, and the urban heat island effect is relieved.
From the viewpoint of pavement application, pervious concrete is required to have not only good water permeability and strength but also good freeze-thaw resistance. Especially in some remote severe cold areas, the pervious concrete can be subjected to freeze thawing damage under the condition of long-time low temperature, cracks and gaps are generated, the service life of the pervious concrete is shortened, and economic loss is caused. Therefore, improving the freeze-thawing resistance of pervious concrete is a technical problem to be solved.
Disclosure of Invention
The application provides permeable concrete and a preparation method thereof in order to solve the problem of poor freeze thawing resistance of permeable concrete.
In a first aspect, the application provides permeable concrete, which adopts the following technical scheme:
the permeable concrete consists of the following raw materials in parts by weight: 100-125 parts of water, 270-300 parts of cement, 1300-1500 parts of coarse aggregate, 8-15 parts of water reducer, 15-40 parts of single-end hydroxyl silicone oil, 25-50 parts of tannic acid and 50-80 parts of amphiphilic cellulose.
By adopting the technical scheme, active groups are contained on tannic acid, single-end hydroxyl silicone oil and amphiphilic cellulose, and can be crosslinked with each other to form a crosslinked network in a concrete system, so that the stability of a permeable concrete structure is improved, and the compression resistance and freeze thawing resistance of the permeable concrete structure are improved; in addition, the tannic acid can be complexed with calcium ions in a pervious concrete system, so that the content of soluble calcium in the system is reduced, the possibility of corrosion of the pervious concrete is reduced, and the durability and freeze-thawing resistance of the concrete are improved; the silicone oil end of the single-end hydroxyl silicone oil and the lipophilic end of the amphiphilic cellulose are matched with each other to form a hydrophobic layer on the surface of the sizing material wrapping the coarse aggregate, so that water can pass through the inner pore canal of the pervious concrete more smoothly, the water does not stay in the pore canal of the pervious concrete to be blocked, the possibility of freezing and thawing damage of the concrete caused by long-term retention of water in the pervious concrete is reduced, and the freezing and thawing resistance of the pervious concrete is further improved.
Preferably, the weight part of the single-end hydroxyl silicone oil is 30-40 parts.
Preferably, the weight of the tannic acid is 40-50 parts.
Preferably, the amphipathic cellulose is prepared by reacting cellulose and octenyl succinic anhydride according to a mass ratio of (10-20): 1.
Preferably, the mass ratio of the cellulose to the octenyl succinic anhydride is (15-20): 1.
Preferably, the raw materials of the pervious concrete further comprise 20-35 parts of hyperbranched polyester; the hyperbranched polyester is one or more of hydroxyl-terminated hyperbranched polyester, carboxyl-terminated hyperbranched polyester, amino-terminated hyperbranched polyester and epoxy-terminated hyperbranched polyester.
By adopting the technical scheme, the hyperbranched polyester contains a large number of active groups which can be crosslinked and bonded with other active groups in the concrete system; in addition, hyperbranched polyesters contain a large number of branched structures which are capable of physically entangling with segments in single-ended hydroxyl silicone oils, tannins and amphiphilic celluloses; through the mode, the stability of the pervious concrete structure is further improved, and the compression resistance and the freeze thawing resistance of the pervious concrete structure are improved.
Preferably, the hyperbranched polyester is a hydroxyl-terminated hyperbranched polyester and/or a carboxyl-terminated hyperbranched polyester.
By adopting the technical scheme, the hydroxyl-terminated hyperbranched polyester and the carboxyl-terminated hyperbranched polyester are synergistic in the aspects of improving the compression resistance and the freeze-thawing resistance of the pervious concrete.
Preferably, the raw materials of the pervious concrete further comprise 20-40 parts of reinforcing fibers.
By adopting the technical scheme, the compressive strength and the freeze-thawing resistance of the pervious concrete can be further improved by adding the reinforcing fibers.
Preferably, the reinforcing fiber is one or more of polypropylene fiber, polyvinyl alcohol fiber, polyester fiber, polyamide fiber and polyacrylonitrile fiber.
In a second aspect, the application provides a preparation method of permeable concrete, which adopts the following technical scheme:
the preparation method of the pervious concrete comprises the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and amphiphilic cellulose to obtain the pervious concrete.
In summary, the application has the following beneficial effects:
1. according to the application, single-end hydroxyl silicone oil, tannic acid and amphiphilic cellulose are added into raw materials of the permeable concrete, and active groups are contained on the three substances, and can be crosslinked with each other to form a crosslinked network in a concrete system, so that the stability of the permeable concrete structure is improved, and the compression resistance and freeze thawing resistance of the permeable concrete structure are improved; in addition, the tannic acid can be complexed with calcium ions in a permeable concrete system, so that the possibility of corrosion of the permeable concrete is reduced, and the durability and freeze-thawing resistance of the concrete are improved; the silicone oil end of the single-end hydroxyl silicone oil and the lipophilic end of the amphiphilic cellulose are matched with each other to form a hydrophobic layer on the surface of the sizing material wrapping the coarse aggregate, so that water can pass through the inner pore canal of the pervious concrete more smoothly, the water does not stay in the pore canal of the pervious concrete to be blocked, the possibility of freezing and thawing damage of the concrete caused by long-term retention of water in the pervious concrete is reduced, and the freezing and thawing resistance of the pervious concrete is further improved.
2. In the application, hyperbranched polyester is preferably added into the raw materials of the pervious concrete, and the hyperbranched polyester contains a large number of active groups which can be crosslinked and bonded with other active groups in the concrete system; in addition, hyperbranched polyesters contain a large number of branched structures which are capable of physically entangling with segments in single-ended hydroxyl silicone oils, tannins and amphiphilic celluloses; through the mode, the stability of the pervious concrete structure is further improved, and the compression resistance and the freeze thawing resistance of the pervious concrete structure are improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw material specifications used in the following examples and comparative examples are detailed in Table 1 unless otherwise specified.
TABLE 1 raw materials specification information
Preparation example of amphiphilic cellulose
Preparation example 1
The amphipathic cellulose is prepared by the following steps:
mixing 14.55kg of cellulose and 30L of N, N-dimethylacetamide, heating to 80 ℃, preserving heat for 1h, adding 700g of 4-dimethylaminopyridine and 500g of triethylamine, uniformly mixing, adding 1.45kg of octenyl succinic anhydride, heating to 100 ℃, preserving heat for 3h to obtain a cellulose esterification product, adding 80% ethanol-water mixed solution to precipitate the cellulose esterification product, centrifuging, pouring out supernatant to obtain a precipitate, washing, centrifuging and drying the precipitate to obtain the amphipathic cellulose.
Preparation example 2
The amphipathic cellulose is prepared by the following steps:
mixing 15.24kg of cellulose and 30L of N, N-dimethylacetamide, heating to 80 ℃, preserving heat for 1h, adding 700g of 4-dimethylaminopyridine and 500g of triethylamine, uniformly mixing, adding 0.76kg of octenyl succinic anhydride, heating to 100 ℃, preserving heat for 3h to obtain a cellulose esterification product, adding 80% ethanol-water mixed solution to precipitate the cellulose esterification product, centrifuging, pouring out supernatant to obtain a precipitate, washing, centrifuging and drying the precipitate to obtain the amphipathic cellulose.
Preparation example 3
The amphipathic cellulose is prepared by the following steps:
mixing 15kg of cellulose and 30L of N, N-dimethylacetamide, heating to 80 ℃, preserving heat for 1h, adding 700g of 4-dimethylaminopyridine and 500g of triethylamine, uniformly mixing, adding 1kg of octenyl succinic anhydride, heating to 100 ℃, preserving heat for 3h to obtain a cellulose esterification product, adding 80% ethanol-water mixed solution to precipitate the cellulose esterification product, centrifuging, pouring out supernatant to obtain a precipitate, washing, centrifuging and drying the precipitate to obtain the amphiphilic cellulose.
Examples
Example 1
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid and 0.5kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 2
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid and 0.5kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose prepared in preparation example 2 to obtain the pervious concrete.
Example 3
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid and 0.5kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose prepared in preparation example 3 to obtain the pervious concrete.
Example 4
A pervious concrete comprises the following components in percentage by weight:
1.25kg of water, 3kg of cement, 15kg of coarse aggregate, 0.15kg of water reducer, 0.4kg of single-end hydroxyl silicone oil, 0.5kg of tannic acid and 0.8kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 5
A pervious concrete comprises the following components in percentage by weight:
1.1kg of water, 2.8kg of cement, 14kg of coarse aggregate, 0.1kg of water reducer, 0.3kg of single-end hydroxyl silicone oil, 0.4kg of tannic acid and 0.6kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 6
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.2kg of hydroxyl-end hyperbranched polyester.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid, hydroxyl-end hyperbranched polyester and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 7
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.2kg of carboxyl-end hyperbranched polyester.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid, carboxyl-end hyperbranched polyester and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 8
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose, 0.1kg of hydroxyl-end hyperbranched polyester and 0.1kg of carboxyl-end hyperbranched polyester.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid, hydroxyl-end hyperbranched polyester, carboxyl-end hyperbranched polyester and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 9
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.35kg of carboxyl-end hyperbranched polyester.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid, carboxyl-end hyperbranched polyester and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Example 10
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.2kg of polypropylene fiber.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphipathic cellulose and polypropylene fiber prepared in preparation example 1 to obtain the pervious concrete.
Example 11
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.4kg of polypropylene fiber.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphipathic cellulose and polypropylene fiber prepared in preparation example 1 to obtain the pervious concrete.
Example 12
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid, 0.5kg of amphiphilic cellulose and 0.2kg of polyester fiber.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and the amphiphilic cellulose and polyester fiber prepared in preparation example 1 to obtain the permeable concrete.
Comparative example
Comparative example 1
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.4kg of single-end hydroxyl silicone oil and 0.5kg of tannic acid.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil and tannic acid to obtain the permeable concrete.
Comparative example 2
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.3kg of single-end hydroxyl silicone oil and 0.6kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil and the amphiphilic cellulose prepared in preparation example 1 to obtain the pervious concrete.
Comparative example 3
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.3kg of tannic acid and 0.6kg of amphiphilic cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, tannic acid and the amphiphilic cellulose prepared in preparation example 1 to obtain the permeable concrete.
Comparative example 4
A pervious concrete comprises the following components in percentage by weight:
1kg of water, 2.7kg of cement, 13kg of coarse aggregate, 0.08kg of water reducer, 0.15kg of single-end hydroxyl silicone oil, 0.25kg of tannic acid and 0.5kg of cellulose.
The pervious concrete is prepared according to the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and cellulose to obtain the pervious concrete.
Detection method
The pervious concrete prepared in examples 1 to 12 and comparative examples 1 to 4 was put into a mold in two layers, simultaneously, was inserted and rammed 20 times with a metal rod having a diameter of 20mm until it was parallel to the top surface of the test mold, then, the test mold was put into a mechanical vibration table and vibrated for 5 seconds, immediately removed, and then, concrete was continuously put into the test mold, and simultaneously, manually vibrated for 20 times until the concrete was filled in the test mold tightly, the excess concrete was removed and smoothed, and then, the test mold was sealed with a film, and was left in a standard curing room for water-spraying curing for 24 hours, and then, the mold was disassembled, and the temperature of the standard curing room was set to 20 ℃ and the humidity was 96%, and was cured until it was 28 days to expire, to obtain a test piece of 100mm×100 mm.
Referring to GB/T25993-2010, the water permeability coefficient of the test piece is tested, and test results show that the water permeability coefficients of the water permeable concrete prepared by the examples and the comparative examples meet the requirements;
referring to GB/T50081-2002, the 28d compressive strength of the above test piece was tested, and the specific test results are shown in Table 2 below: referring to GB/T50082-2009, testing the freeze-thawing resistance of the test piece, immersing the test piece in water with the water temperature of (20+/-2) DEG C for 4 days, taking out the test piece, drying the test piece, placing the test piece in a freeze-thawing cycle testing machine, starting a freeze-thawing cycle test, wherein the lowest temperature of the test piece is (-18+/-2) DEG C, the highest temperature is (5+/-1) DEG C, the freeze-thawing cycle time is 8 h/time, reducing the temperature to-20 ℃ at the rate of 10 ℃/h, keeping the temperature for 1.5h, keeping the temperature for 1h after the temperature rises to 5 ℃ for one cycle, weighing and calculating the mass loss rate when the cycle time is 60 times, wherein the mass loss rate P= (M0-M60)/M0 multiplied by 100%
P is the mass loss rate after 60 freeze thawing cycles; m0 is the initial mass of the test piece before freeze thawing cycle; m60 is the mass of the test piece after the 60 th freeze thawing cycle, and the specific detection results are shown in the following table 2:
TABLE 2 Performance detection of pervious concrete
As shown in Table 2, the 28d compressive strength of the pervious concrete prepared by the embodiment of the application is more than or equal to 32.1MPa, the mass loss rate after 60 times of freeze thawing cycle is less than or equal to 0.98%, the compressive strength of the pervious concrete is higher, and the freeze thawing resistance is better.
As can be seen in combination with examples 1 and comparative examples 1-4 and Table 2, the 28d compressive strength of the pervious concrete prepared in example 1 is much greater than that of comparative examples 1-4, and the mass loss rate after 60 freeze-thaw cycles is much less than that of comparative examples 1-4; this may be because: comparative example 1 did not contain amphipathic cellulose, comparative example 2 did not contain tannic acid, comparative example 3 did not contain single end hydroxyl silicone oil, comparative example 4 used plain cellulose instead of amphipathic cellulose prepared in the preparation; in the embodiment 1, single-end hydroxyl silicone oil, tannic acid and amphiphilic cellulose are added into the raw materials of the permeable concrete, and the three substances all contain active groups which can be crosslinked with each other to form a crosslinked network in the concrete system, so that the stability of the permeable concrete structure is improved, and the compression resistance and freeze thawing resistance of the permeable concrete structure are improved; in addition, the tannic acid can be complexed with calcium ions in a permeable concrete system, so that the possibility of corrosion of the permeable concrete is reduced, and the durability and freeze-thawing resistance of the concrete are improved; the silicone oil end of the single-end hydroxyl silicone oil and the lipophilic end of the amphiphilic cellulose are matched with each other to form a hydrophobic layer on the surface of the sizing material wrapping the coarse aggregate, so that water can pass through the inner pore canal of the pervious concrete more smoothly, the water does not stay in the pore canal of the pervious concrete to be blocked, the possibility of freezing and thawing damage of the concrete caused by long-term retention of water in the pervious concrete is reduced, and the freezing and thawing resistance of the pervious concrete is further improved.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.

Claims (10)

1. The pervious concrete is characterized in that: the material comprises the following raw materials in parts by weight: 100-125 parts of water, 270-300 parts of cement, 1300-1500 parts of coarse aggregate, 8-15 parts of water reducer, 15-40 parts of single-end hydroxyl silicone oil, 25-50 parts of tannic acid and 50-80 parts of amphiphilic cellulose.
2. The pervious concrete of claim 1, wherein: the weight part of the single-end hydroxyl silicone oil is 30-40 parts.
3. The pervious concrete of claim 1, wherein: 40-50 parts of tannic acid.
4. The pervious concrete of claim 1, wherein: the amphipathic cellulose is prepared by reacting cellulose and octenyl succinic anhydride according to the mass ratio of (10-20): 1.
5. The pervious concrete of claim 4, wherein: the mass ratio of the cellulose to the octenyl succinic anhydride is (15-20): 1.
6. The pervious concrete of claim 1, wherein: the raw materials of the pervious concrete further comprise 20-35 parts of hyperbranched polyester; the hyperbranched polyester is one or more of hydroxyl-terminated hyperbranched polyester, carboxyl-terminated hyperbranched polyester, amino-terminated hyperbranched polyester and epoxy-terminated hyperbranched polyester.
7. The pervious concrete of claim 6, wherein: the hyperbranched polyester is hydroxyl-terminated hyperbranched polyester and/or carboxyl-terminated hyperbranched polyester.
8. The pervious concrete of claim 1, wherein: the permeable concrete also comprises 20-40 parts of reinforcing fibers.
9. The pervious concrete of claim 8, wherein: the reinforcing fiber is one or more of polypropylene fiber, polyvinyl alcohol fiber, polyester fiber, polyamide fiber and polyacrylonitrile fiber.
10. A method for preparing permeable concrete according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
mixing cement and coarse aggregate to obtain a mixed material; and mixing the mixed material with water, a water reducing agent, single-end hydroxyl silicone oil, tannic acid and amphiphilic cellulose to obtain the pervious concrete.
CN202310726642.9A 2023-06-19 2023-06-19 Permeable concrete and preparation method thereof Pending CN116675476A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117285302A (en) * 2023-10-17 2023-12-26 齐鲁高速(山东)装配有限公司 Freeze thawing resistant pervious concrete and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117285302A (en) * 2023-10-17 2023-12-26 齐鲁高速(山东)装配有限公司 Freeze thawing resistant pervious concrete and preparation method thereof
CN117285302B (en) * 2023-10-17 2024-05-17 齐鲁高速(山东)装配有限公司 Freeze thawing resistant pervious concrete and preparation method thereof

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