CN111978034B - Anti-permeation high-strength high-volume-stability concrete, preparation method thereof and application of concrete as cushion block for protective layer - Google Patents
Anti-permeation high-strength high-volume-stability concrete, preparation method thereof and application of concrete as cushion block for protective layer Download PDFInfo
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
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- C—CHEMISTRY; METALLURGY
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- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses an impervious high-strength high-volume-stability concrete, a preparation method thereof and application thereof as a cushion block for a protective layer. The raw materials of the concrete with impermeability, high strength and high volume stability comprise the following components: expanding agent, yellow sand, silica fume, water reducing agent, defoaming agent, common Portland cement, matrix asphalt and petroleum resin; the expanding agent is a mixture of any one or more of anhydrite, shell powder, vermiculite hydrate or graphene, and the using amount of the anhydrite is not less than 50% of the total amount of the expanding agent; the water reducing agent is a mixture of any one or more than two of an aliphatic water reducing agent and a naphthalene water reducing agent, an amino water reducing agent or a polycarboxylic acid water reducing agent in any proportion, and the using amount of the aliphatic water reducing agent is not less than 50% of the total amount of the water reducing agent. The high-strength high-volume-stability concrete is used as a cushion block for a reinforced concrete protective layer, can improve the tensile strength and the impact resistance of the cushion block, can be attached to the surface of a reinforcing steel bar, and improves the corrosion resistance of the reinforcing steel bar.
Description
Technical Field
The invention belongs to the technical field of construction engineering construction, and particularly relates to anti-permeability high-strength high-volume stability concrete, a preparation method thereof and application thereof as a cushion block for a protective layer.
Background
At present, reinforced concrete is used as a main building material, and the durability of the building directly concerns the service life cycle of the whole building and the later maintenance cost; as is well known, the steel bars in the reinforced concrete are easy to generate electrochemical reaction to cause corrosion, so that the structural stability of the whole reinforced concrete is damaged, and the life and property safety of people is threatened. In order to increase the structural stability of the whole concrete, a cushion block for a protective layer is often used to prevent the reinforced concrete from being rusted or the structural stability of the reinforced concrete from losing efficacy; the cushion block for the protective layer in the existing reinforced concrete has low compressive strength, so that the volume stability is poor, and the long-acting protective effect is difficult to play.
Disclosure of Invention
The invention provides high-strength high-volume stability concrete, a preparation method thereof and application thereof as a cushion block for a protective layer, aiming at the problems of low compressive strength and poor volume stability of a steel bar protective layer used in the existing engineering, and the cushion blocks with various specifications and shapes are formulated by designing a high-strength high-volume stability concrete proportion and combining with the actual situation on site, so that the protective function of the steel bar protective layer is effectively guaranteed, the maintenance is carried out for 28 days, and the compressive strength can reach 50-90 Mpa.
The high-strength high-volume stability concrete comprises the following raw materials in parts by weight:
4-12 parts of an expanding agent,
40-60 parts of yellow sand,
2-6 parts of silica fume,
0.1 to 0.6 portion of water reducing agent,
0.01 to 0.08 portion of defoaming agent,
35 to 50 parts of ordinary Portland cement,
15-30 parts of matrix asphalt,
10-20 parts of petroleum resin.
The expanding agent is a mixture of any one or more of anhydrite, shell powder, vermiculite hydrate or graphene, and the using amount of the anhydrite is not less than 50% of the total amount of the expanding agent.
The yellow sand is sand in zone II, and has mud content of less than or equal to 2.0% and mud block content of less than or equal to 0.5%
The defoaming agent is a polyether modified organic silicon defoaming agent, the defoaming time is less than 20 seconds, and the foam inhibition time is not less than 30 min.
The matrix asphalt and the petroleum resin are conventional products which are purchased commercially.
The water reducing agent is a mixture of any one or more than two of an aliphatic water reducing agent and a naphthalene water reducing agent, an amino water reducing agent or a polycarboxylic acid water reducing agent in any proportion, and the using amount of the aliphatic water reducing agent is not less than 50% of the total amount of the water reducing agent.
Further, the raw materials of the high-strength high-volume-stability concrete also comprise 5-10 parts of polyethylene wax. Polyethylene wax is added into the ingredients of the cushion block, so that the later-stage forming of the cushion block is facilitated on one hand, and the compressive strength of the cushion block is improved by utilizing the cohesive force of the polyethylene wax on the other hand.
Further, the raw materials of the high-strength high-volume stability concrete also comprise 5-10 parts of glass fiber. The polyethylene wax and the glass fiber are used in a composite mode, the polyethylene wax is attached to the surface of the glass fiber, and meanwhile, a space net structure with the glass fiber as a framework is formed in the cushion block, so that the portland cement particles are captured, and the compression strength of the cushion block is further improved.
The preparation method of the high-strength high-volume stability concrete comprises the following operation steps:
s1, mixing the raw materials according to a ratio, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the molded product in molds of different shapes, and curing and molding for 24 hours;
s4, after the form is removed, placing the concrete in a curing room with the humidity not lower than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the high-strength high-volume stability concrete.
The high-strength high-volume-stability concrete disclosed by the invention is applied as a cushion block for a reinforced concrete protective layer.
The invention has the following beneficial effects:
the high-strength high-volume-stability concrete disclosed by the invention can be used for making cushion blocks with various specifications and shapes by combining with the actual conditions on site, so that the protection function of a reinforcing steel bar protection layer can be effectively guaranteed. According to the invention, the aliphatic water reducing agent and the anhydrite are compounded, and the water absorption of the anhydrite and the aliphatic water reducing agent form a synergistic effect, so that the curing rate of the cushion block is further improved; because the anhydrite can generate calcium ions after being dissolved in water, the calcium ions and the aliphatic water reducing agent generate calcification reaction to form water-insoluble compounds such as fatty acid calcium and the like, the tensile strength and the shock resistance of the cushion block are improved, and the cushion block can be attached to the surface of the reinforcing steel bar to improve the corrosion resistance of the reinforcing steel bar.
Drawings
FIG. 1 is a schematic view of a spacer block according to example 1 of the present invention;
FIG. 2 is a schematic view of a spacer block according to example 2 of the present invention;
FIG. 3 is a schematic view of a spacer block according to embodiment 3 of the present invention;
FIG. 4 is a schematic diagram of a spacer block of example 4 of the present invention.
Detailed Description
Example 1: a concrete protection cushion block with impermeability, high strength and high volume stability is shown in figure 1, and a strip cushion block is mainly used for plate, beam and column members and comprises the following components in parts by weight: 4 parts of expanding agent, 40 parts of yellow sand, 2 parts of silica fume, 0.1 part of water reducing agent, 0.01 part of defoaming agent, 35 parts of ordinary portland cement, 15 parts of matrix asphalt and 10 parts of petroleum resin.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
S3, placing the mixture in a mold, and curing and molding for 24 hours;
s4, after the mold is removed, placing the steel bar in a curing room with the humidity not lower than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the steel bar protective layer thickness control block.
Example 2: a impervious high-strength high-volume-stability concrete protection cushion block is a wheel type cushion block and is mainly used for components in the vertical direction of a side wall and the like as shown in figure 2, and comprises 12 parts of an expanding agent, 60 parts of yellow sand, 6 parts of silica fume, 0.6 part of a water reducing agent, 0.08 part of an antifoaming agent, 50 parts of ordinary portland cement, 30 parts of matrix asphalt and 20 parts of petroleum resin.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
S3, placing the mixture in a mold for curing and forming for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Example 3: a concrete protection cushion block with impermeability, high strength and high volume stability, a quincunx cushion block, as shown in figure 3, comprises 8 parts of an expanding agent, 50 parts of yellow sand, 4 parts of silica fume, 0.3 part of a water reducing agent, 0.04 part of an antifoaming agent, 42 parts of ordinary portland cement, 22 parts of matrix asphalt and 15 parts of petroleum resin.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
And S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Example 4: a concrete protection cushion block with impermeability, high strength and high volume stability is used for an axillary corner of a beam body, and is shown in figure 4, and comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of a water reducing agent, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold and curing for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Example 5: a concrete protection cushion block with impermeability, high strength and high volume stability is used for an axillary corner of a beam body, and is shown in figure 4, and comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of a water reducing agent, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The expanding agent is composed of 70% anhydrite and 30% vermiculite hydrate.
The water reducing agent consists of 60 percent of aliphatic series, 20 percent of naphthalene series water reducing agent and 20 percent of amino water reducing agent.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold and curing for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Example 6: a concrete protection cushion block with impermeability, high strength and high volume stability is used for an axillary corner of a beam body, and is shown in figure 4, and comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of a water reducing agent, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The expanding agent is composed of 75% of anhydrite and 25% of graphene.
The water reducing agent consists of 55% of aliphatic series, 20% of polycarboxylic acid and 25% of amino water reducing agent.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold and curing for 24 hours;
and S4, after removing the formwork, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the impervious high-strength high-volume-stability concrete protective cushion block.
Example 7: the concrete protective cushion block with the characteristics of permeability resistance, high strength and high volume stability comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of a water reducing agent, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt, 16 parts of petroleum resin and 8 parts of polyethylene wax.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt, petroleum resin and polyethylene wax, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Example 8: the concrete protecting cushion block with high impermeability, high strength and high volume stability comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of a water reducing agent, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt, 16 parts of petroleum resin, 8 parts of polyethylene wax and 10 parts of glass fiber.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The water reducing agent consists of 60 percent of aliphatic series and 40 percent of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps of:
s1, mixing an expanding agent, yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt, petroleum resin, polyethylene wax and glass fiber, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Comparative example 1: the concrete protective cushion block comprises 55 parts of yellow sand, 5 parts of silica fume, 0.4 part of water reducing agent, 0.07 part of defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The water reducing agent consists of 60% of aliphatic series and 40% of polycarboxylic acid.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing yellow sand, silica fume, a water reducing agent, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Comparative example 2: the concrete protective cushion block with the impermeability, high strength and high volume stability comprises 6 parts of an expanding agent, 55 parts of yellow sand, 5 parts of silica fume, 0.07 part of a defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The expanding agent consists of 60 percent of anhydrite and 40 percent of shell powder.
The defoaming agent is composed of polyether modified organic silicon.
The preparation method of the comparative test comprises the following operation steps:
s1, mixing an expanding agent, yellow sand, silica fume, a defoaming agent, ordinary portland cement, matrix asphalt, petroleum resin, polyethylene wax and glass fiber, and uniformly stirring by using a stirrer;
S2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
Comparative example 3: the concrete protective cushion block with impermeability, high strength and high volume stability comprises 55 parts of yellow sand, 5 parts of silica fume, 0.07 part of defoaming agent, 45 parts of ordinary portland cement, 20 parts of matrix asphalt and 16 parts of petroleum resin.
The preparation method of the impervious high-strength high-volume-stability concrete protection cushion block comprises the following operation steps:
s1, mixing yellow sand, silica fume, a defoaming agent, ordinary portland cement, matrix asphalt and petroleum resin, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the mixture in a mold, and curing and molding for 24 hours;
and S4, after the mold is removed, placing the concrete in a curing room with the humidity of not less than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the anti-permeability high-strength high-volume-stability concrete protection cushion block.
The compression strength of the cushion blocks in the examples 1-8 and the comparative examples 1-3 of the invention is tested according to the regulation of GB50107 'concrete strength test evaluation standard';
testing the permeability resistance of the cushion blocks in the examples 1-8 and the comparative examples 1-3 of the invention according to the regulations of the standard GB/T50082-2019 for testing the long-term performance and durability of common concrete
And (3) performance testing:
table 1 results of performance testing
Comparing the above case data, it can be seen from examples 1, 2, 3 and 4 that when the mixing amount of the expanding agent and the water reducing agent reaches the optimum value, the synergistic effect of the gypsum and the aliphatic water reducing agent enables the strength of the concrete protection cushion block to reach the optimum value; comparing examples 5, 6 and 7, it can be seen that the polyethylene wax and the glass fiber both contribute to the strength and structural compactness of the protective mat, and when both are blended in a certain proportion, the strength and impermeability of the mat are optimized. Example 4 and comparative examples 1, 2 and 3 show that gypsum and aliphatic water reducing agent both have an effect of promoting the strength of the concrete protective cushion block, and the addition of the gypsum and the aliphatic water reducing agent simultaneously can generate calcium fatty acid to promote the strength and the impermeability of the cushion block.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, 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 invention.
Claims (5)
1. The concrete with the impermeability, high strength and high volume stability is characterized by comprising the following raw materials in parts by weight: 4-12 parts of an expanding agent, 40-60 parts of yellow sand, 2-6 parts of silica fume, 0.1-0.6 part of a water reducing agent, 0.01-0.08 part of a defoaming agent, 35-50 parts of ordinary portland cement, 15-30 parts of matrix asphalt and 10-20 parts of petroleum resin;
the expanding agent is a mixture of any one or more of anhydrite, shell powder, vermiculite hydrate or graphene, and the using amount of the anhydrite is not less than 50% of the total amount of the expanding agent;
the yellow sand is the sand in the area II, the mud content is less than or equal to 2.0 percent, and the mud block content is less than or equal to 0.5 percent;
the defoaming agent is a polyether modified organic silicon defoaming agent, the defoaming time is less than 20 seconds, and the foam inhibition time is not less than 30 min;
the water reducing agent is a mixture of any one or more than two of an aliphatic water reducing agent and a naphthalene water reducing agent, an amino water reducing agent or a polycarboxylic acid water reducing agent in any proportion, and the using amount of the aliphatic water reducing agent is not less than 50% of the total amount of the water reducing agent.
2. The concrete with high strength and high volume stability as claimed in claim 1, wherein the raw materials further comprise 5-10 parts of polyethylene wax.
3. The concrete with high strength and high volume stability as claimed in claim 1, wherein the raw materials further comprise 5-10 parts of glass fiber.
4. A method for preparing a high-strength high-volume stability concrete according to any one of claims 1 to 3, characterized by comprising the following steps:
s1, mixing the raw materials according to a ratio, and uniformly stirring by using a stirrer;
s2, adding water according to the weight part ratio of 0.13-0.20, and uniformly stirring by using a mortar stirrer;
s3, placing the molded product in molds of different shapes, and curing and molding for 24 hours;
s4, after the form is removed, placing the concrete in a curing room with the humidity not lower than 95% and the temperature of 20 +/-2 ℃ for curing for 28 days to obtain the high-strength high-volume stability concrete.
5. Use of a high strength high volume stability concrete according to any one of claims 1 to 3 as a spacer for a protective layer of reinforced concrete.
Priority Applications (1)
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| CN102276192A (en) * | 2011-05-11 | 2011-12-14 | 马清浩 | Grouting material containing phenol modified aliphatic water reducer and preparation method thereof |
| CN102731037A (en) * | 2012-07-20 | 2012-10-17 | 成都市第六建筑工程公司 | Concrete cushion block |
| EP2842921A1 (en) * | 2013-08-27 | 2015-03-04 | Construction Research & Technology GmbH | Novel fibers, methods for their preparation and use in the manufacture of reinforced elements |
| CN104805963A (en) * | 2015-04-24 | 2015-07-29 | 华南理工大学 | Ultrahigh-performance cement cushion block and preparation method thereof |
| CN105198327A (en) * | 2015-10-30 | 2015-12-30 | 杨洋 | Anti-corrosion concrete material and preparation method thereof |
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| CN102276192A (en) * | 2011-05-11 | 2011-12-14 | 马清浩 | Grouting material containing phenol modified aliphatic water reducer and preparation method thereof |
| CN102731037A (en) * | 2012-07-20 | 2012-10-17 | 成都市第六建筑工程公司 | Concrete cushion block |
| EP2842921A1 (en) * | 2013-08-27 | 2015-03-04 | Construction Research & Technology GmbH | Novel fibers, methods for their preparation and use in the manufacture of reinforced elements |
| CN104805963A (en) * | 2015-04-24 | 2015-07-29 | 华南理工大学 | Ultrahigh-performance cement cushion block and preparation method thereof |
| CN105198327A (en) * | 2015-10-30 | 2015-12-30 | 杨洋 | Anti-corrosion concrete material and preparation method thereof |
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