CN111470828A - Novel fiber-reinforced alkali-activated slag concrete material and preparation method thereof - Google Patents
Novel fiber-reinforced alkali-activated slag concrete material and preparation method thereof Download PDFInfo
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- CN111470828A CN111470828A CN202010238614.9A CN202010238614A CN111470828A CN 111470828 A CN111470828 A CN 111470828A CN 202010238614 A CN202010238614 A CN 202010238614A CN 111470828 A CN111470828 A CN 111470828A
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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
- C04B28/08—Slag 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
- 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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a fiber reinforced alkali-activated slag concrete material and a preparation method thereof. The concrete material consists of slag, sodium hydroxide, water glass, sand, broken stone, coal gangue, water, a high-efficiency water reducing agent and basalt fiber. The contents of all components are calculated according to mass fraction, and the proportion is as follows: 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber. The novel concrete material obtained by the invention has good bonding between the basalt fiber and the concrete matrix, and obviously improves the tensile strength and the crack resistance, and is higher than that of common concrete. Because the fibre can reduce the concrete shrink and restrain the development of crack inside the concrete to when the concrete received external load, the transmission load that can be even avoided concrete internal stress to concentrate, appear destroying, can greatly improve concrete bulk strength.
Description
Technical Field
The invention belongs to the field of concrete building materials, and particularly relates to a novel fiber-reinforced alkali-activated slag concrete material and a preparation method thereof.
Background
The alkali-activated slag concrete is used as a green and environment-friendly material, and can reduce CO2 released by cement production. Slag is a waste material produced in an iron making process, but due to its nature, it can be potentially activated by alkali. The coal gangue is used as a bulk solid waste, and the accumulated gangue can pollute the land, air and water. The coal gangue is used as aggregate and is doped into the alkali-activated slag concrete, so that a large amount of solid waste can be utilized, and the method is a beneficial attempt; however, after the coal gangue is doped into the alkali-activated slag concrete, the strength of the concrete can be reduced, and simultaneously, because the splitting tensile strength and the breaking strength of the alkali-activated slag concrete are lower, the mechanical property of the alkali-activated slag concrete needs to be improved by doping fibers.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel fiber reinforced alkali-activated slag concrete material and a preparation method thereof.
A fiber reinforced alkali-activated slag concrete material and a preparation method thereof comprise the following steps:
(1) the required materials are accurately weighed, and 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber are adopted.
(2) Preparing sodium hydroxide solution with part of water, standing for a period of time, pouring water glass into the sodium hydroxide solution, and preparing alkali-activated solution.
(3) Slag, sand, broken stone, coal gangue and a high-efficiency water reducing agent are uniformly mixed, and basalt fibers are gradually added in the process to prevent the fibers from agglomerating.
(4) The prepared alkali-activated solution is gradually poured into the mixed material, and the mixed material is stirred in time while the solution is poured, so that the slag is sufficiently activated. Adding the rest water into the concrete material and uniformly mixing again to obtain the concrete.
The fiber-reinforced alkali-activated slag concrete material according to claim, wherein the required water is divided into two parts, one part is prepared with the alkali-activated solution, and the other part is added when the concrete is to be mixed.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the slag is grade S95. The sand adopts natural sand, the crushed stone is natural crushed stone with the grain diameter of 10-20mm, and the coal gangue is selected from peaceful coal mine in Fuxin City, and is crushed for use, with the grain diameter of 10-20 mm.
The fiber reinforced alkali-activated slag concrete material according to claim, wherein the water glass modulus is 3.3 and the baume degree is 40.
The fiber-reinforced alkali-activated slag concrete material of claim, wherein the superplasticizer is a polycarboxylic acid superplasticizer.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the basalt fiber has a length of 6mm, a diameter of 18 μm and a density of 2650kg/m3。
The invention has the beneficial effects that: the invention not only solves the waste problem of the industry and the coal industry, but also prepares a novel fiber reinforced alkali-activated slag concrete material by utilizing the waste through research. The prepared novel concrete overcomes the defects of low tensile strength, low breaking strength and large shrinkage of common concrete. The novel building material is provided creatively, can be used for bridge construction and building floor slab construction, provides reference basis for preparation of similar concrete, promotes engineering application of the novel concrete, and solves the problem of shortage of natural sandstone resources.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is further provided. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A fiber reinforced alkali-activated slag concrete material and a preparation method thereof comprise the following steps:
(1) the required materials are accurately weighed, and 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber are adopted.
(2) Preparing sodium hydroxide solution with all water, standing for a period of time, pouring water glass into the sodium hydroxide solution, and preparing the alkali-activated solution.
(3) Slag, sand, broken stone, coal gangue and a high-efficiency water reducing agent are uniformly mixed, and basalt fibers are gradually added in the process to prevent the fibers from agglomerating.
(4) The prepared alkali-activated solution is gradually poured into the mixed material, and the mixed material is stirred in time while the solution is poured, so that the slag is sufficiently activated. And then uniformly mixing the mixture to obtain the finished product.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the slag is grade S95. The sand adopts natural sand, the crushed stone is natural crushed stone with the grain diameter of 10-20mm, and the coal gangue is selected from peaceful coal mine in Fuxin City, and is crushed for use, with the grain diameter of 10-20 mm.
The fiber reinforced alkali-activated slag concrete material according to claim, wherein the water glass modulus is 3.3 and the baume degree is 40.
The fiber-reinforced alkali-activated slag concrete material of claim, wherein the superplasticizer is a polycarboxylic acid superplasticizer.
The fiber-reinforced alkali-activated ore concrete material according to claim, wherein the basalt fiber has a length of 6mm, a diameter of 18 μm and a density of 2650kg/m3. The fibers should be slowly blended during blending, and fully stirred to prevent agglomeration.
Slump and mechanical strength of the fiber reinforced alkali-activated slag concrete prepared in the example are shown in the table.
Example 2
A fiber reinforced alkali-activated slag concrete material and a preparation method thereof comprise the following steps:
(1) the required materials are accurately weighed, and 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber are adopted.
(2) Preparing sodium hydroxide solution with part of water, standing for a period of time, pouring water glass into the sodium hydroxide solution, and preparing alkali-activated solution.
(3) Mixing slag, sand, broken stone, coal gangue, a high-efficiency water reducing agent and basalt fiber together.
(4) The prepared alkali-activated solution is gradually poured into the mixed material, and the mixed material is stirred in time while the solution is poured, so that the slag is sufficiently activated. And then uniformly mixing the mixture to obtain the finished product.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the slag is grade S95. The sand adopts natural sand, the crushed stone is natural crushed stone with the grain diameter of 10-20mm, and the coal gangue is selected from peaceful coal mine in Fuxin City, and is crushed for use, with the grain diameter of 10-20 mm.
The fiber reinforced alkali-activated slag concrete material according to claim, wherein the water glass modulus is 3.3 and the baume degree is 40.
The fiber-reinforced alkali-activated slag concrete material of claim, wherein the superplasticizer is a polycarboxylic acid superplasticizer.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the basalt fiber has a length of 6mm, a diameter of 18 μm and a density of 2650kg/m3。
Slump and mechanical strength of the fiber reinforced alkali-activated slag concrete prepared in the example are shown in the table.
Example 3
The embodiment provides a novel fiber reinforced alkali-activated slag concrete material and a preparation method thereof, and the preparation process of the novel fiber reinforced alkali-activated slag concrete material comprises the following key points:
a fiber reinforced alkali-activated slag concrete material and a preparation method thereof comprise the following steps:
(1) the required materials are accurately weighed, and 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber are adopted.
(2) Preparing sodium hydroxide solution with part of water, standing for a period of time, pouring water glass into the sodium hydroxide solution, and preparing alkali-activated solution.
(3) Slag, sand, broken stone, coal gangue and a high-efficiency water reducing agent are uniformly mixed, and basalt fibers are gradually added in the process to prevent the fibers from agglomerating.
The prepared alkali-activated solution is gradually poured into the mixed material, and the mixed material is stirred in time while the solution is poured, so that the slag is sufficiently activated. Adding the rest water into the concrete material and uniformly mixing again to obtain the concrete.
The fiber-reinforced alkali-activated slag concrete material according to claim, wherein the required water is divided into two parts, one part is prepared with the alkali-activated solution, and the other part is added when the concrete is to be mixed.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the slag is grade S95. The sand adopts natural sand, the crushed stone is natural crushed stone with the grain diameter of 10-20mm, and the coal gangue is selected from peaceful coal mine in Fuxin City, and is crushed for use, with the grain diameter of 10-20 mm.
The fiber reinforced alkali-activated slag concrete material according to claim, wherein the water glass modulus is 3.3 and the baume degree is 40.
The fiber-reinforced alkali-activated slag concrete material of claim, wherein the superplasticizer is a polycarboxylic acid superplasticizer.
The fiber reinforced alkali-activated slag concrete material as claimed in claim, wherein the basalt fiber has a length of 6mm, a diameter of 18 μm and a density of 2650kg/m3. The fibers should be slowly blended during blending, and fully stirred to prevent agglomeration.
Slump and mechanical strength of the fiber reinforced alkali-activated slag concrete prepared in the example are shown in the table.
In this embodiment in preparing novel fibre and increase alkali excitation slag concrete, at first divide into two parts with water, partly be used for preparing alkali excitation solution to obtain higher alkali concentration environment, fully excite the activity of slay, in order to do benefit to the increase of concrete intensity. And the other part of water is added after the activity of the slag is fully excited, so that on one hand, the increase of the concrete strength is not influenced, and on the other hand, the workability of the concrete and the uniformity of concrete mixing are facilitated. When the concrete is mixed, the fibers are not added all at one time, and the basalt fibers are slowly added and fully stirred, so that the dispersion of the fibers is facilitated, and the overall strength of the concrete is improved. When the initial strength of the fiber reinforced alkali-activated slag concrete is formed, the shrinkage of the concrete can be inhibited, and the generation and expansion of cracks can be prevented. When the concrete bears external load, the fiber can redistribute the internal stress of the concrete, and avoid stress concentration. When the external load is too large and the concrete begins to crack, energy is consumed when the fibers are pulled out of the concrete matrix first. Second, the fibers bridging the sides of the fracture can prevent further development of the fracture.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A fiber reinforced alkali-activated slag concrete material and a preparation method thereof comprise the following steps:
(1) the required materials are accurately weighed, and 414 parts of slag, 29 parts of sodium hydroxide, 138 parts of water glass, 515 parts of sand, 717 parts of crushed stone, 239 parts of coal gangue, 166 parts of water, 8 parts of a high-efficiency water reducing agent and 13.3 parts of basalt fiber are adopted.
(2) Preparing sodium hydroxide solution with part of water, standing for a period of time, pouring water glass into the sodium hydroxide solution, and preparing alkali-activated solution.
(3) Slag, sand, broken stone, coal gangue and a high-efficiency water reducing agent are uniformly mixed, and basalt fibers are gradually added in the process to prevent the fibers from agglomerating.
(4) The prepared alkali-activated solution is gradually poured into the mixed material, and the mixed material is stirred in time while the solution is poured, so that the slag is sufficiently activated. Adding the rest water into the concrete material and uniformly mixing again to obtain the concrete.
2. The fiber-reinforced alkali-activated slag concrete material according to claim 1, wherein the required water is divided into two parts, one part is prepared with the alkali-activated solution, and the other part is added when the concrete is to be mixed.
3. A fiber reinforced alkali activated slag concrete material according to claim 1, wherein the slag is of grade S95. The sand adopts natural sand, the crushed stone is natural crushed stone with the grain diameter of 10-20mm, and the coal gangue is selected from peaceful coal mine in Fuxin City, and is crushed for use, with the grain diameter of 10-20 mm.
4. The fiber reinforced alkali-activated slag concrete material according to claim 1, wherein the water glass modulus is 3.3 and the baume degree is 40.
5. The fiber-reinforced alkali-activated slag concrete material according to claim 1, wherein the superplasticizer is a polycarboxylic acid superplasticizer.
6. The fiber-reinforced alkali-activated slag concrete material as claimed in claim 1, wherein the basalt fiber is of a length of 6mm, a diameter of 18 μm and a density of 2650kg/m3。
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| CN202010238614.9A CN111470828A (en) | 2020-03-30 | 2020-03-30 | Novel fiber-reinforced alkali-activated slag concrete material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113087476A (en) * | 2021-03-29 | 2021-07-09 | 安徽理工大学 | Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof |
| CN113105164A (en) * | 2021-01-05 | 2021-07-13 | 安徽理工大学 | Method for controlling shrinkage performance of alkali-activated slag mortar by using basalt fibers |
| CN113250028A (en) * | 2021-04-25 | 2021-08-13 | 广州大学 | Construction method of alkali slag concrete pavement |
| CN114133194A (en) * | 2020-12-16 | 2022-03-04 | 淮北工业建筑设计院有限责任公司 | All-coal gangue rapid-hardening early-strength concrete and preparation method thereof |
| CN114486723A (en) * | 2022-01-11 | 2022-05-13 | 武汉理工大学 | Method for verifying binding performance of basalt reinforced alkali-activated concrete |
| CN116143457A (en) * | 2023-01-17 | 2023-05-23 | 广西大学 | Fiber reinforced slag-bagasse ash-based geopolymer material and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133194A (en) * | 2020-12-16 | 2022-03-04 | 淮北工业建筑设计院有限责任公司 | All-coal gangue rapid-hardening early-strength concrete and preparation method thereof |
| CN113105164A (en) * | 2021-01-05 | 2021-07-13 | 安徽理工大学 | Method for controlling shrinkage performance of alkali-activated slag mortar by using basalt fibers |
| CN113087476A (en) * | 2021-03-29 | 2021-07-09 | 安徽理工大学 | Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof |
| CN113250028A (en) * | 2021-04-25 | 2021-08-13 | 广州大学 | Construction method of alkali slag concrete pavement |
| CN114486723A (en) * | 2022-01-11 | 2022-05-13 | 武汉理工大学 | Method for verifying binding performance of basalt reinforced alkali-activated concrete |
| CN114486723B (en) * | 2022-01-11 | 2023-10-24 | 武汉理工大学 | Method for verifying binding performance of basalt tendon alkali-activated concrete |
| CN116143457A (en) * | 2023-01-17 | 2023-05-23 | 广西大学 | Fiber reinforced slag-bagasse ash-based geopolymer material and preparation method thereof |
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Application publication date: 20200731 |