CN111908870A - Heat-resistant and fire-resistant concrete and preparation method thereof - Google Patents
Heat-resistant and fire-resistant concrete and preparation method thereof Download PDFInfo
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- CN111908870A CN111908870A CN202010811231.6A CN202010811231A CN111908870A CN 111908870 A CN111908870 A CN 111908870A CN 202010811231 A CN202010811231 A CN 202010811231A CN 111908870 A CN111908870 A CN 111908870A
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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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- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- 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
- C04B2111/763—High temperatures
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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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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to heat-resistant and fire-resistant concrete and a preparation method thereof, relating to the field of green building materials, wherein the heat-resistant and fire-resistant concrete comprises the following components: 1100 parts of refractory coarse aggregate, 700 parts of refractory fine aggregate, 400 parts of ordinary portland cement, 60-120 parts of mineral powder, 30-60 parts of high-alumina powder, 7-13 parts of silica micropowder, 8-12 parts of polycarboxylic acid water reducer, 1-5 parts of dispersant and 200 parts of water 150. The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps: s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder, the dispersing agent and other powder materials in a sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material; s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete. The application has excellent heat-resistant fireproof performance, construction performance and the effect that economic practicality is strong.
Description
Technical Field
The application relates to the field of green building materials, in particular to heat-resistant and fire-resistant concrete and a preparation method thereof.
Background
The common traditional concrete is artificial stone prepared by using cement as a cementing material, using sand and stone as aggregates and adding an admixture, an additive and the like, and the strength of the artificial stone is sharply reduced after the ambient temperature exceeds 300 ℃, because hydration products in the cement stone are decomposed and dehydrated at high temperature and the lattice structure is broken. When the temperature reaches 600-800 ℃, the aggregate containing quartzite and limestone can expand rapidly and generate chemical decomposition, and the strength of the concrete is also reduced remarkably. The normal use temperature of the ordinary concrete should not exceed 250 ℃. Therefore, ordinary concrete cannot meet the use requirements of special projects, and heat-resistant concrete must be adopted.
The heat (fire) resistant concrete can be used at 200-1200 deg.C for a long time, and can retain the required physical and mechanical properties and volume stability. The heat-resistant concrete is mainly used for industrial kiln foundations, shells, chimneys, nuclear pressure vessels and the like, and can bear the high temperature effect for a long time and the repeated temperature change of heating and cooling. The performance of the material is a main factor for determining the strength of the heat-resistant concrete, and the type and the amount of the cementing material, the water-cement ratio, the aggregate gradation, the particle size, the amount of the admixture, the additive and the like have great influence on the heat-resistant and high-temperature-resistant performance, and the construction difficulty, such as the stirring transportation difficulty, the pumping difficulty and the like, must be considered. At the same time, economic cost is one of the key factors to be considered.
In view of the above-mentioned related arts, the inventors of the present invention have considered that heat (fire) resistant concrete currently used on the market generally has a problem that heat (fire) resistant performance, workability, and economical applicability are not well balanced, and therefore it is very necessary to develop fire and heat resistant concrete having good fire and heat resistance and workability and economical applicability.
Disclosure of Invention
In order to solve the problem that the heat (fire) resistance, the construction performance and the economic applicability of the heat (fire) resistant concrete are difficult to balance, the application provides the heat (fire) resistant concrete and a preparation method thereof.
The application provides a heat-resisting fire-resistant concrete adopts following technical scheme:
the heat-resistant and fire-resistant concrete comprises the following components in parts by weight: 1100 parts of refractory coarse aggregate, 700 parts of refractory fine aggregate, 400 parts of ordinary portland cement, 60-120 parts of mineral powder, 30-60 parts of high-alumina powder, 7-13 parts of silica micropowder, 8-12 parts of polycarboxylic acid water reducer, 1-5 parts of dispersant and 200 parts of water 150.
By adopting the technical scheme, the fireproof coarse aggregate and the fireproof fine aggregate can provide a good heat-resistant fireproof foundation for concrete, and the concrete has good heat-resistant fireproof performance and construction performance by matching with powder materials with excellent heat-resistant fireproof performance, such as high-alumina powder, silica powder and the like and assisting with auxiliaries such as a polycarboxylic acid water reducing agent, a dispersing agent and the like. In addition, the raw materials are cheap and easy to obtain, the cost can be effectively controlled, and the economic practicability is high.
Preferably, the heat and fire resistant concrete comprises the following components: 1050 parts of refractory coarse aggregate 1030 and 660 parts of refractory fine aggregate 630 and 360 parts of ordinary portland cement, 70-90 parts of mineral powder, 45-55 parts of high-alumina powder, 9-11 parts of silica powder, 9.5-10.5 parts of polycarboxylic acid water reducing agent, 2-4 parts of dispersing agent and 175 parts of water 155 and sand.
By adopting the technical scheme, experimental data show that when the concrete raw materials are proportioned, the heat-resistant fireproof performance of the concrete is better, and the construction performance is more excellent.
Preferably, the refractory coarse aggregate comprises at least one of granite, diabase, andesite, basalt, syenite and amphibole.
By adopting the technical scheme, the granite, diabase, andesite, basalt, orthobarite and amphibole are igneous rocks with excellent heat-resistant and fireproof performances, and have wide sources, low price and easy obtainment, so that the concrete can have good heat-resistant and fireproof performances, the material cost can be effectively controlled, and the economic applicability is better.
Preferably, the refractory coarse aggregate is granite coarse aggregate, and the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25 mm.
By adopting the technical scheme, the granite (the andesite and the basalt) with the particle size of 5-25mm can play a good aggregate supporting role for the concrete, and experimental data shows that the granite with the particle size of 5-25mm selected for the concrete has excellent heat resistance, higher compressive strength and other physical and mechanical properties.
Preferably, the refractory fine aggregate is a refractory andesite and basalt mixture with the grain size of 0.15-5 mm.
By adopting the technical scheme, the refractory fine aggregate is a mixture of refractory andesite and basalt with the grain size of 0.15-5mm, and can form good grading action with coarse aggregate with the grain size of 6-26mm, and experimental data shows that the heat-resistant and fireproof performance of the concrete can be further improved, and the physical and mechanical properties of the concrete can also be improved.
Preferably, the raw materials of the refractory concrete also comprise 25-35 parts of fly ash and 15-25 parts of silica fume.
By adopting the technical scheme, the fly ash has the characteristics of porosity and high adsorbability, and has strong water absorption, so that the free water content in concrete can be reduced, the water-cement ratio can be reduced, and the heat-resistant and fireproof performance of the concrete can be further improved. The silica fume is an amorphous spherical particle with high activity, has a smooth surface, is filled in pores among cement particles to form gel with hydration products, improves the internal structure of concrete, improves the compactness and further improves the physical and mechanical properties of the concrete; it also has good lubricating effect, and can improve workability and construction performance of mixed concrete.
Preferably, the raw materials of the refractory concrete also comprise 8-12 parts of refractory mortar and 6-10 parts of clay powder.
By adopting the technical scheme, the refractory clay and the clay powder form a ceramic combination body at high temperature to be hardened, so that the physical mechanical strength of the concrete in a high-temperature environment is enhanced.
Preferably, the dispersant is sodium tripolyphosphate and/or sodium hexametaphosphate.
By adopting the technical scheme, experimental data show that the 28-day strength and the impermeability grade of the concrete are improved when sodium tripolyphosphate and sodium hexametaphosphate are added into the concrete as a dispersing agent.
Preferably, the silicon micropowder is ultrafine silicon micropowder.
By adopting the technical scheme, experimental data show that the compressive strength, impermeability, slump and other properties of the concrete after the silica powder is adopted are improved to different degrees, and the comprehensive performance of the concrete is more excellent.
The preparation method of the heat-resistant and fire-resistant concrete adopts the following technical scheme:
a preparation method of heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder, the dispersing agent and other powder materials in a sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
By adopting the technical scheme, in the concrete mixing process, the solid material and the powder material are mixed firstly, so that the powder material is uniformly dispersed in the solid material, and then the liquid materials such as water, a polycarboxylate water reducing agent and the like are added, so that the powder material agglomeration and blocking phenomena can be effectively reduced, the mixing uniformity of each raw material of the concrete is improved, the internal structure of the concrete is improved, and the physical and mechanical properties of the concrete are finally improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the fireproof coarse aggregate and the fireproof fine aggregate are selected to provide a good heat-resistant fireproof foundation for the concrete, and are matched with powder materials with excellent heat-resistant fireproof performance, such as high-alumina powder, silicon micropowder and the like, and auxiliary agents, such as a polycarboxylic acid water reducing agent, a dispersing agent and the like, are also assisted, so that the concrete has good heat-resistant fireproof performance and construction performance;
2. the coarse aggregate, the fine aggregate and the powder in the concrete raw materials form good gradation by selecting proper particle size, improve the internal structure of the concrete and improve the physical and mechanical properties of the concrete;
3. in the application, the raw materials are cheap and easy to obtain, the cost can be effectively controlled, and the economic practicability is high.
Detailed Description
Example 1:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Table 1 examples 1-6 component content table
Wherein, the fire-resistant coarse aggregate and the fire-resistant fine aggregate are diabase, the grain size of the fire-resistant coarse aggregate is 20-30mm, and the grain size of the fine aggregate is 3-8 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The polycarboxylic acid water reducing agent is sodium lignosulfonate.
The dispersant is paraffin.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 2:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Wherein the refractory coarse aggregate is a mixture of andesite and long rock with the mass ratio of 1:1, and the particle size is 10-20 mm.
The fine aggregate is a mixture of diabase and amphibole with the mass ratio of 1:1, and the particle size is 0.5-3 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The polycarboxylic acid water reducing agent is sodium lignosulfonate.
The dispersant is paraffin.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 3:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Wherein the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25mm and the mass ratio of 1: 1.
The fine aggregate is a mixture of diabase and amphibole with the mass ratio of 1:1, and the particle size is 0.5-3 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The dispersant is paraffin.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 4:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Wherein the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25mm and the mass ratio of 1: 1.
The fine aggregate is a mixture of refractory andesite and basalt with the grain size of 0.15-5 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The dispersant is sodium tripolyphosphate.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 5:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Wherein the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25mm and the mass ratio of 1: 1.
The fine aggregate is a mixture of refractory andesite and basalt with the grain size of 0.15-5 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The dispersing agent is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a mass ratio of 1: 1.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 6:
the heat-resistant and fire-resistant concrete comprises the following components in percentage by weight shown in Table 1.
Wherein the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25mm and the mass ratio of 1: 1.
The fine aggregate is a mixture of refractory andesite and basalt with the grain size of 0.15-5 mm.
The ordinary portland cement is P.O 42.5 portland cement.
The mineral powder is S95 grade mineral powder.
The average grain diameter of the high-alumina powder is 0.15 mm.
The dispersant is sodium hexametaphosphate.
The preparation method of the heat-resistant and fire-resistant concrete comprises the following steps:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder and the dispersing agent in sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
Example 7:
this example is different from example 4 in that the concrete further includes 25kg of fly ash and 15kg of silica fume in the raw materials, and in the preparation method of the heat and flame resistant concrete, the fly ash and the silica fume are added in step S1.
Example 8:
this example differs from example 4 in that the concrete further includes 8kg of fireclay and 6kg of clay powder as raw materials, and in the method for producing the heat and flame resistant concrete, the fireclay and the clay powder are added in step S1.
Example 9:
this example differs from example 4 in that the concrete further includes 30kg of fly ash, 20kg of silica fume, 10kg of fire clay, and 8kg of clay powder as raw materials, and in the method for producing the heat and fire resistant concrete, the fly ash, the silica fume, the fire clay, and the clay powder are added in step S1.
Example 10:
the difference between the embodiment and the embodiment 9 is that the fly ash, the silica fume, the refractory clay and the clay powder in the concrete are respectively 35kg of fly ash, 25kg of silica fume, 12kg of refractory clay and 10kg of clay powder.
Comparative example 1:
the comparative example is different from example 1 in that refractory coarse aggregate and refractory fine aggregate are respectively replaced by marble having a particle size of 20 to 30mm and 3 to 8mm in terms of equal mass.
Comparative example 2:
the comparative example is different from example 1 in that the ore powder is replaced by high-alumina powder, silicon micropowder and the like.
And (3) performance detection:
first, initial compressive strength, residual compressive strength after firing test
1. Test equipment:
(1) TYE-2000B pressure tester;
(2) SRJX-8-13 box type resistance furnace;
2. sample preparation
The mixed concrete of examples 1 to 10 and comparative examples 1 to 2 were used to prepare 3 cubic blocks each having a size of 100X 100mm by means of a test mold.
And (3) performing standard maintenance on the cube sample blocks for 28d, measuring the 28d standard compressive strength, taking the average value of each group of cube sample blocks as the last 28d standard compressive strength of each group, and drying the cube sample blocks for 24h at the temperature of 110 ℃.
Then placing each cubic sample block in an SRJX-8-13 box type resistance furnace, heating to 700 ℃ at the heating rate of 140 ℃/h, keeping the temperature for 3h, and stopping heating to cool the cubic sample blocks to room temperature along with the resistance furnace.
The cooled cubic blocks were taken out of the SRJX-8-13 box-type resistance furnace, the fired residual compressive strength was measured by a TYE-2000B pressure tester, and the average value of each group of cubic blocks was taken as the final fired residual compressive strength of each group, and the measurement results are shown in table 2.
Second, slump test
Slump of the kneaded concrete in examples 1 to 10 and comparative examples 1 to 2 was measured, and the measurement results are shown in Table 2.
Third, impermeability test
The concrete samples obtained in examples 1 to 10 and comparative examples 1 to 2 were subjected to a water permeation resistance test in accordance with "test method Standard for Long-term Performance and durability of ordinary concrete" GB/T50082-2009, and the test results are shown in Table 2.
TABLE 2 Performance test tables for examples 1-10 and comparative examples 1-2
The implementation principle of the embodiment of the application is as follows: the concrete has good heat-resistant and fireproof performance and construction performance by selecting the refractory coarse aggregate and the refractory fine aggregate to provide a good heat-resistant and fireproof foundation for the concrete, matching with powder materials with excellent heat-resistant and fireproof performances such as high-alumina powder, silicon micropowder and the like and simultaneously assisting with auxiliaries such as a polycarboxylic acid water reducing agent, a dispersing agent and the like.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The heat-resistant and fire-resistant concrete is characterized by comprising the following components in parts by weight: 1100 parts of refractory coarse aggregate, 700 parts of refractory fine aggregate, 400 parts of ordinary portland cement, 60-120 parts of mineral powder, 30-60 parts of high-alumina powder, 7-13 parts of silica micropowder, 8-12 parts of polycarboxylic acid water reducer, 1-5 parts of dispersant and 200 parts of water 150.
2. The heat and fire resistant concrete according to claim 1, wherein the heat and fire resistant concrete comprises the following components in parts by weight: 1050 parts of refractory coarse aggregate 1030 and 660 parts of refractory fine aggregate 630 and 360 parts of ordinary portland cement, 70-90 parts of mineral powder, 45-55 parts of high-alumina powder, 9-11 parts of silica powder, 9.5-10.5 parts of polycarboxylic acid water reducing agent, 2-4 parts of dispersing agent and 175 parts of water 155 and sand.
3. A heat and fire resistant concrete according to claim 1, wherein: the refractory coarse aggregate comprises at least one of granite, diabase, andesite, basalt, orthobarite and amphibole.
4. A heat and fire resistant concrete according to claim 3, wherein: the refractory coarse aggregate is granite coarse aggregate, and the granite coarse aggregate is a mixture of andesite and basalt with the particle size of 5-25 mm.
5. A heat and fire resistant concrete according to claim 1 or 2, characterized in that: the refractory fine aggregate is a mixture of refractory andesite and basalt with the grain size of 0.15-5 mm.
6. The heat and fire resistant concrete according to claim 2, wherein the raw materials of the fire resistant concrete further comprise 25-35 parts of fly ash and 15-25 parts of silica fume.
7. A heat and fire resistant concrete according to claim 2, wherein: the raw materials of the refractory concrete also comprise 8-12 parts of refractory clay and 6-10 parts of clay powder.
8. A heat and fire resistant concrete according to claim 1 or 2, characterized in that: the dispersing agent is sodium tripolyphosphate and/or sodium hexametaphosphate.
9. A heat and fire resistant concrete according to claim 8, wherein: the silicon micropowder is superfine silicon micropowder.
10. A method for producing a heat and flame resistant concrete for use in producing a heat and flame resistant concrete according to any one of claims 1 to 9, comprising the steps of:
s1, solid material dry mixing: weighing the raw materials according to the proportion, mixing and stirring the refractory coarse aggregate, the refractory fine aggregate, the ordinary portland cement, the mineral powder, the high-alumina powder, the silicon micropowder, the dispersing agent and other powder materials in a sequence from more to less, and stirring for 2min till the mixture is uniform to obtain a pre-mixed dry material;
s2, mixing water: and (4) adding a polycarboxylic acid water reducing agent and water into the premixed dry material obtained in the step S1 in sequence, and stirring for 2min till the mixture is uniform to obtain the mixed concrete.
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Cited By (9)
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| CN112521085A (en) * | 2020-11-18 | 2021-03-19 | 嘉禾县永丰混凝土有限公司 | Fireproof heat-resistant concrete |
| CN113087469A (en) * | 2021-04-12 | 2021-07-09 | 北京东峰兴达耐火材料有限公司 | Heat-resistant mortar |
| CN113698157A (en) * | 2021-10-18 | 2021-11-26 | 广州中创建筑科技有限公司 | Concrete with fire resistance |
| CN113929363A (en) * | 2021-09-26 | 2022-01-14 | 中国化学工程第十四建设有限公司 | High-temperature-resistant mortar for aircraft engine exhaust tower and preparation process thereof |
| CN114315283A (en) * | 2022-01-17 | 2022-04-12 | 中建八局浙江建设有限公司 | High-strength refractory concrete |
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| CN112521085A (en) * | 2020-11-18 | 2021-03-19 | 嘉禾县永丰混凝土有限公司 | Fireproof heat-resistant concrete |
| CN113087469A (en) * | 2021-04-12 | 2021-07-09 | 北京东峰兴达耐火材料有限公司 | Heat-resistant mortar |
| CN113087469B (en) * | 2021-04-12 | 2022-04-19 | 北京东峰兴达耐火材料有限公司 | Heat-resistant mortar |
| CN113929363A (en) * | 2021-09-26 | 2022-01-14 | 中国化学工程第十四建设有限公司 | High-temperature-resistant mortar for aircraft engine exhaust tower and preparation process thereof |
| CN113698157A (en) * | 2021-10-18 | 2021-11-26 | 广州中创建筑科技有限公司 | Concrete with fire resistance |
| CN114315283A (en) * | 2022-01-17 | 2022-04-12 | 中建八局浙江建设有限公司 | High-strength refractory concrete |
| CN115215592A (en) * | 2022-06-29 | 2022-10-21 | 广东至道先进土木工程材料技术研究有限公司 | Refractory concrete and preparation method thereof |
| CN115215592B (en) * | 2022-06-29 | 2023-09-08 | 广东至道先进土木工程材料技术研究有限公司 | Refractory concrete and preparation method thereof |
| CN115925365A (en) * | 2022-12-28 | 2023-04-07 | 湖北兴龙高温节能材料有限公司 | High-temperature-resistant pumping concrete for blast furnace foundation and preparation method thereof |
| CN116535173A (en) * | 2023-05-10 | 2023-08-04 | 贵阳中建西部建设有限公司 | High-temperature-resistant concrete and preparation method thereof |
| CN117361956A (en) * | 2023-10-26 | 2024-01-09 | 江苏中建商品混凝土有限公司 | Heat-resistant low-carbon concrete and preparation method thereof |
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