CN112250363A - High-toughness concrete and preparation method thereof - Google Patents
High-toughness concrete and preparation method thereof Download PDFInfo
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- CN112250363A CN112250363A CN202011155873.1A CN202011155873A CN112250363A CN 112250363 A CN112250363 A CN 112250363A CN 202011155873 A CN202011155873 A CN 202011155873A CN 112250363 A CN112250363 A CN 112250363A
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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
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/14—Minerals of vulcanic origin
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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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The invention provides high-toughness concrete and a preparation method thereof, wherein the high-toughness concrete comprises the following raw materials: concrete ingredients, graphene oxide, flake materials, chopped fibers and a dispersing lubricant: wherein the concrete ingredients comprise: coarse aggregate, fine aggregate, a cementing material, water and an additive. The concrete has the advantages of high strength, good impermeability, good durability, strong toughness and the like, and can effectively ensure that materials are uniformly dispersed and the mixture is well stirred.
Description
Technical Field
The application relates to the technical field of concrete, in particular to high-toughness concrete and a preparation method thereof.
Background
The concrete has excellent comprehensive use performance, so that the concrete becomes one of the largest building materials in the world at present, and has good mechanical property and use performance. However, the development and application range of concrete are restricted by the lower tensile strength thereof relative to the excellent compression resistance thereof. Factors such as environmental change, deformation and load can cause the concrete not to crack to different degrees in the using process, and the service performance and durability of the concrete are influenced, so that the concrete material does not fully exert the performance of the concrete material and is out of service in advance. With the development of concrete technology, concrete and cement develop to high strength, the strength of cement is continuously improved, the dosage is continuously increased, and the cracking problem of a concrete structure is more and more obvious.
Disclosure of Invention
In view of the above, the invention provides a high-toughness concrete and a preparation method thereof, so that the concrete has the advantages of high strength, good impermeability, good durability, strong toughness and the like, and the uniform dispersion of materials and the good stirring of a mixture can be effectively ensured.
The technical scheme of the invention is realized as follows:
the high-toughness concrete comprises the following raw materials: concrete ingredients, graphene oxide, flake materials, chopped fibers and a dispersing lubricant:
wherein the concrete ingredients comprise: coarse aggregate, fine aggregate, a cementing material, water and an additive;
wherein the total volume of the chopped fibers is not less than 7% of the total volume of the high-toughness concrete;
the chopped fibers include: short fibers and long fibers;
the difference of the slenderness ratio of the short fibers and the long fibers is more than 100; the total volume of the short fibers is not less than 3.5% of the total volume of the high-toughness concrete, and the total volume of the long fibers is not less than 3.5% of the total volume of the high-toughness concrete;
the total mass of the scale material is not less than 0.5% of the total mass of the cementing material; the mesh number of the scale material is 200-400;
the thickness of the graphene oxide is 0.7-2 microns, and the total mass of the graphene oxide is not less than 0.04% of the total mass of the cementing material;
the total mass of the dispersed lubricant does not exceed 0.05% of the total mass of the chopped fibers.
Preferably, the cementing material is cement; the scale material is basalt scale material.
Preferably, the chopped fibers are polyvinyl alcohol chopped fibers.
Preferably, the short fibers include: polyvinyl alcohol and steel fibers;
alternatively, the short fibers comprise: polypropylene fibers and steel fibers;
alternatively, the short fibers comprise: polypropylene coarse and fine fibers.
Preferably, the dispersing lubricant is hydrous magnesium silicate.
Preferably, the cementing material is cement.
Preferably, the additives include: water reducing agent, shrinkage reducing agent and expanding agent;
the maximum particle size of the coarse aggregate in the concrete ingredient is not more than 12 mm.
The invention also provides a preparation method of the high-toughness concrete, which comprises the following steps:
mixing the scale material with the cementing material, and stirring for a preset first time to form a first component;
mixing the graphene oxide, water and an additive, and stirring for a preset second time to form a second component;
dividing the dispersing lubricant into two parts with equal mass, then mixing one part of the dispersing lubricant with the short fibers and the fine aggregate, and stirring for a preset third time to form a third component;
mixing the other part of the dispersed lubricant with the long fibers and the coarse aggregate, and stirring for a preset fourth time to form a fourth component;
mixing the first component and the third component, and stirring for a preset fifth time to form a fifth component;
mixing the fifth component and the second component, and stirring for a preset sixth time to form a sixth component;
and mixing the sixth component and the fourth component, and stirring for a preset seventh time to form the high-toughness concrete.
Preferably, the first time period and the second time period are 1 minute;
the third time period, the fourth time period and the sixth time period are 2 minutes;
the fifth time period is 3 minutes;
the seventh length of time is 5 minutes.
As can be seen from the above, in the high-toughness concrete and the preparation method thereof, due to the use of the graphene oxide and the scale material, the compactness of the concrete can be increased, the hydration degree of the cement can be improved, the initial defects and cracks in the structure can be reduced, and the crack resistance of the fine microstructure of the concrete can be enhanced; in addition, the low-strength short fibers are used for limiting the micro-crack area, so that the crack resistance effect of a local area is achieved, and the growth of macro cracks is limited; the macro crack area is limited by using high-strength long fiber, so that the toughening and the strengthening of the structure are realized; in addition, a dispersing lubricant is used, so that friction between various components can be greatly reduced, and the various components can be more easily dispersed.
Drawings
Fig. 1 is a schematic flow chart of a method for producing a high-toughness concrete according to an embodiment of the present invention.
FIG. 2 is a schematic representation of the blending sequence in an embodiment of the present invention.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
According to practical application experience and various experimental results in a laboratory, concrete cracking is a result influenced by various factors. In order to reduce the damage and loss of concrete cracking to the engineering, in the actual engineering, the anti-cracking capacity of the concrete can be improved by adding a modified material into the concrete or changing the proportion of the concrete.
The influence of concrete proportioning on concrete cracks is mainly as follows: water-cement ratio, aggregate particle size, additives, etc. Therefore, the measures of adding mineral admixtures (fly ash and mineral powder), polycarboxylic acid high-performance water reducing agents, shrinkage reducing agents, expanding agents and the like into the concrete can improve the anti-cracking performance of the concrete.
In addition to the addition of additives to concrete, the incorporation of fibers into concrete is also an effective method of improving the crack resistance and toughness of concrete. The fiber concrete widely applied in civil engineering at present comprises: steel fiber concrete, glass fiber concrete, carbon fiber concrete, synthetic fiber concrete. Different fibers have different limiting effects on different cracks due to the difference of the properties of the fibers. For example, the low-strength short fibers have a good effect of limiting the development of microcracks, and can improve the early strength of concrete; the high-strength long fiber can bridge macroscopic cracks, has obvious limiting effect on the macroscopic cracks, and can enhance the toughness and later strength of concrete. Compared with the method of doping single fiber, the method of doping multiple fibers and reasonably adjusting the proportion of the fibers can compound the characteristics of each fiber with the performance of the concrete, and is more suitable for various application scenes in engineering. The fiber is doped to a certain extent to make up the inherent defects of concrete materials, but the fiber is doped while the fluidity of the concrete mixture is reduced, the stirring difficulty of the mixture is increased, so that the materials of the concrete are difficult to stir uniformly, the service performance of the fiber in the concrete is influenced, and even the performance of the concrete is reduced. Therefore, a good construction process is very important for ensuring the service performance of the fiber concrete.
Under the action of the stress inside or outside the concrete, when the stress of the concrete exceeds the local tensile strength of the material, micro cracks are generated in the local area of the concrete, so that the use performance of the concrete material is influenced. The cracks in the concrete can be classified into three levels of cracks such as initial defects, micro cracks, macro cracks and the like according to the generated reasons and characteristics. The initial defects are voids and holes, which are generally on the nanometer and micrometer scale, caused by insufficient water loss and hydration during the casting and hardening of concrete. Initial defects are caused by internal stresses in the concrete, which, when the stresses exceed the tensile strength of the concrete material, form initial micro-cracks, the size of which is usually on the order of microns. With the increase of stress, the micro cracks are expanded along the primary pores and the weak surface of the material, and with the increasing density of the micro cracks, the micro cracks are gradually converged to form macro cracks, usually in millimeter level. The size of a fiber structure doped in general fiber concrete is millimeter level, the development of millimeter level cracks can be effectively limited, but the effective control effect on micro cracks and microscopic cracks (namely initial defects) is difficult to achieve.
Therefore, in the technical scheme of the invention, the invention provides the high-toughness concrete.
In an embodiment of the invention, the high-toughness concrete comprises the following raw materials: concrete ingredients, graphene oxide, a flake material, chopped fibers and a dispersing lubricant;
wherein the concrete ingredients comprise: coarse aggregate, fine aggregate, a cementing material, water and an additive.
Wherein the total volume of the chopped fibers is not less than 7% of the total volume of the high-toughness concrete; the chopped fibers include: short fibers and long fibers; the difference of the slenderness ratio of the short fibers and the long fibers is more than 100; the total volume of the short fibers is not less than 3.5% of the total volume of the high-toughness concrete, and the total volume of the long fibers is not less than 3.5% of the total volume of the high-toughness concrete;
the total mass of the scale material is not less than 0.5% of the total mass of the cementing material; the mesh number of the scale material is 200-400;
the thickness of the graphene oxide is 0.7-2 micrometers (mum), and the total mass of the graphene oxide is not less than 0.04% of the total mass of the cementing material;
the total mass of the dispersed lubricant does not exceed 0.05% of the total mass of the chopped fibers.
In the technical scheme of the invention, the high-toughness concrete is multi-scale mixed crack-resistant toughened concrete. In the high-toughness concrete, due to the use of graphene oxide and scale materials, the compactness of the concrete can be increased, the hydration degree of cement is improved, initial defects and cracks in the structure are reduced, and the crack resistance of a fine concrete structure is enhanced; in addition, the low-strength short fibers are used for limiting the micro-crack area, so that the crack resistance effect of a local area is achieved, and the growth of macro cracks is limited; the macro crack area is limited by using high-strength long fiber, so that the toughening and the strengthening of the structure are realized; in addition, a dispersing lubricant is used, so that friction between various components can be greatly reduced, and the various components can be more easily dispersed.
Specifically, the graphene oxide is a nano-grade material, corresponds to micro cracks in concrete, can obviously reduce holes in cement stone, improves the pore structure of the cement stone, enables gel in the cement to be more uniform and compact, can obviously reduce the generation of needle-shaped ettringite, enables the structure of the cement stone to be more compact, and can refine crystals in the cement, thereby effectively regulating and controlling the microstructure of cement hydration products, and improving the strength, impermeability and durability of the concrete.
Additionally, as an example, in a preferred embodiment of the present invention, the cementitious material may be cement.
Additionally, as an example, in a preferred embodiment of the present invention, the scale material may be basalt scale material.
The basalt flake material is a microscopic material, the size of the basalt flake material is micron-sized, the iron oxide and aluminum oxide content is high, the alkaline oxide content is low, and the basalt flake material has excellent chemical resistance, ageing resistance and other properties. Because of the ultrathin characteristic, the materials can be overlapped and arranged in parallel to form a compact impermeable layer, so that the impermeability of the material can be effectively improved, the mechanical strength, the surface hardness, the wear resistance and the medium permeability resistance of the cement mortar are improved, and simultaneously, the internal stress generated when a part of the cement mortar is hydrated or dried can be absorbed. The basalt flakes can well fill gaps in concrete, reduce and block the communication of capillary holes, and increase the compactness and impermeability of the concrete.
The short fiber corresponds to the macro crack, the low-strength short fiber can limit the development of micro crack, the early strength of the concrete is improved, the high-strength long fiber can bridge the macro crack, and the toughness and the later strength of the concrete are enhanced.
In addition, as an example, in a preferred embodiment of the present invention, the chopped fiber may be polyvinyl alcohol (PVA) chopped fiber.
In the aspect of the present invention, the chopped fibers may be a single type of fiber or a mixture of a plurality of types of fibers, particularly a mixture of fibers having different properties.
For example, as an example, in a preferred embodiment of the present invention, the short fibers may include: PVA and steel fibers. Alternatively, the short fibers may include: polypropylene fibers and steel fibers. Alternatively, the short fibers may include: polypropylene coarse and fine fibers.
The concrete with higher performance requirements adopts the blended fibers, and the performance of the concrete can be compounded with the characteristics of each fiber by reasonably adjusting the proportion of the fibers, so that the performance of the concrete is more diversified compared with the concrete doped with single fiber.
Additionally, as an example, in a preferred embodiment of the present invention, the dispersed lubricant may be hydrous magnesium silicate.
In the technical scheme of the invention, the dispersed lubricant can provide lubrication for dispersion among the components, reduce the friction effect and enable various components to be more easily dispersed.
In addition, in the technical scheme of the invention, the concrete can be common concrete.
For example, in a preferred embodiment of the invention, the concrete may be C30 concrete, as one example.
As another example, in a preferred embodiment of the present invention, the concrete formulation comprises: cement, water, coarse aggregate, fine aggregate and additive; the additive comprises: water reducing agent, shrinkage reducing agent and expanding agent; wherein the coarse aggregate in the concrete formulation has a maximum particle size of no greater than 12 millimeters (mm).
The concrete ingredient is prepared from the following raw materials in parts by weight: 400 portions of cement 350-containing materials, 200 portions of fly ash 150-containing materials, 300 portions of water 200-containing materials, 600 portions of fine aggregate 500-containing materials and 1300 portions of coarse aggregate 1100-containing materials;
wherein, the water-cement ratio is 0.4-0.5, and the sand rate is 0.25-0.35;
the water reducing agent is a polycarboxylic acid water reducing agent, and the mixing amount is 0.006-0.01 of the mass of the cement.
Taking the C30 concrete as an example, the following table shows the material proportion of the C30 concrete per cubic meter of concrete:
| components | Cement (kg) | Fly ash (kg) | Water (kg) | Fine aggregate (kg) | Coarse aggregate (k)g) | Water cement ratio | Sand rate |
| Quality of | 383 | 164 | 235 | 514 | 1204 | 0.43 | 0.3 |
TABLE 1
In addition, the technical scheme of the invention also provides a preparation method of the high-toughness concrete.
Fig. 1 is a schematic flow chart of a method for producing a high-toughness concrete according to an embodiment of the present invention. FIG. 2 is a schematic representation of the blending sequence in an embodiment of the present invention. As shown in fig. 1 and 2, the method for preparing the high-toughness concrete of the present invention may specifically include the following steps:
and step 17, mixing the sixth component and the fourth component, and stirring for a preset seventh time to form the high-toughness concrete.
The high-toughness concrete can be obtained through the steps 11-17.
In addition, in the technical solution of the present invention, the steps 11 to 14 may be performed independently, and a specific execution sequence is not limited. For example, the steps 11 to 14 may be performed simultaneously, or the steps 11 to 14 may be performed in a predetermined order.
In addition, as an example, in a preferred embodiment of the present invention, the first time period may be 1 minute.
In addition, as an example, in a preferred embodiment of the present invention, the second time period may be 1 minute.
In addition, as an example, in a preferred embodiment of the present invention, the third time period and the fourth time period may be 2 minutes.
In addition, as an example, in a preferred embodiment of the present invention, the fifth time period may be 3 minutes.
In addition, as an example, in a preferred embodiment of the present invention, the sixth time period may be 2 minutes.
In addition, as an example, in a preferred embodiment of the present invention, the seventh time period may be 5 minutes.
In the preparation method of the high-toughness concrete, different doping sequences can be set according to different scale characteristics and properties of the doping materials. For example, for nanomaterials (i.e., graphene oxide), the nanomaterials and additives may be mixed together in water and added to the concrete; in the case of the micro material (for example, the scale material), the particle size is similar to that of the aggregate fine aggregate, so that the micro material can be added and stirred together with cement, fine aggregate and dispersing lubricant (for example, the scale material, sand and dispersing lubricant can be added and stirred together); for short fibers, the short fibers can be added with sand and a dispersing lubricant for dry mixing, and the fibers are further scattered by utilizing the friction action of fine aggregates and the impact of blades of a stirrer; for long fibers, the concrete is added with the coarse aggregate and the dispersing lubricant in a dry mixing mode before stirring.
The multi-scale mixed crack-resistant toughened concrete is prepared by the preparation method. The graphene oxide doped in the multi-scale mixed crack-resistant toughened concrete can reduce holes in cement stones, improve the pore structure of the cement stones, enable gels in the cement to be more uniform and compact, reduce the generation of needle-shaped ettringite, enable the structure of the cement stones to be more compact, effectively regulate and control the microstructure of cement hydration products, and improve the strength, the impermeability and the durability of the concrete. The doped basalt flakes have excellent chemical resistance, ageing resistance and other properties, and can form a compact impermeable layer, so that the impermeability of the material can be effectively improved, the mechanical strength, surface hardness, wear resistance and medium permeability resistance of cement mortar are improved, internal stress generated by the cement mortar during hydration or drying is absorbed, gaps in concrete are filled, the communication of capillary holes is reduced and blocked, and the compactness and the impermeability of the concrete are improved. The mixed doping of various fibers can form the mixed effect of the fibers, the low-strength short fibers can limit the development of microcracks and improve the early strength of concrete, and the high-strength long fibers can bridge macroscopic cracks and enhance the toughness and the later strength of the concrete. The proportion of the fibers is reasonably adjusted, so that the properties of the concrete can be compounded with the characteristics of each fiber. In addition, the feeding sequence of the multi-scale mixed cracking-resistant toughened concrete can adopt a mode of feeding in a plurality of times according to different material sizes and properties, so that the materials are stirred more sufficiently, and the problems that the mixture is not suitable for stirring and the dispersibility of the materials is influenced due to the fact that a plurality of materials are simultaneously mixed can be effectively solved.
In general, the proportion of the high-toughness concrete is added with three multi-scale reinforcing materials which are mixed with chopped fibers, basalt flakes, graphene oxide and the like and have different sizes and proportions in the original concrete proportion. By using proper material proportion and material size, the material can be effectively reinforced, gaps and cracks with different sizes can be filled and repaired, and the toughness of the crack resistance of the concrete can be improved. In addition, in the preparation method of the high-toughness concrete, the feeding sequence adopts a mode of feeding in a plurality of times, so that the problems that the mixture is not suitable for stirring and the dispersibility of the materials is influenced due to the fact that a plurality of materials are added at the same time can be effectively solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The high-toughness concrete is characterized by comprising the following raw materials: concrete ingredients, graphene oxide, flake materials, chopped fibers and a dispersing lubricant:
wherein the concrete ingredients comprise: coarse aggregate, fine aggregate, a cementing material, water and an additive;
wherein the total volume of the chopped fibers is not less than 7% of the total volume of the high-toughness concrete;
the chopped fibers include: short fibers and long fibers;
the difference of the slenderness ratio of the short fibers and the long fibers is more than 100; the total volume of the short fibers is not less than 3.5% of the total volume of the high-toughness concrete, and the total volume of the long fibers is not less than 3.5% of the total volume of the high-toughness concrete;
the total mass of the scale material is not less than 0.5% of the total mass of the cementing material; the mesh number of the scale material is 200-400;
the thickness of the graphene oxide is 0.7-2 microns, and the total mass of the graphene oxide is not less than 0.04% of the total mass of the cementing material;
the total mass of the dispersed lubricant does not exceed 0.05% of the total mass of the chopped fibers.
2. The high toughness concrete according to claim 1, wherein:
the cementing material is cement; the scale material is basalt scale material.
3. The high toughness concrete according to claim 1, wherein:
the chopped fibers are polyvinyl alcohol chopped fibers.
4. The high-toughness concrete according to claim 1,
the short fibers include: polyvinyl alcohol and steel fibers;
alternatively, the short fibers comprise: polypropylene fibers and steel fibers;
alternatively, the short fibers comprise: polypropylene coarse and fine fibers.
5. The high toughness concrete according to claim 1, wherein:
the dispersing lubricant is hydrous magnesium silicate.
6. The high toughness concrete according to claim 1, wherein:
the cementing material is cement.
7. The high toughness concrete according to claim 1, wherein:
the additive comprises: water reducing agent, shrinkage reducing agent and expanding agent;
the maximum particle size of the coarse aggregate in the concrete ingredient is not more than 12 mm.
8. The preparation method of the high-toughness concrete is characterized by comprising the following steps of:
mixing the scale material with the cementing material, and stirring for a preset first time to form a first component;
mixing the graphene oxide, water and an additive, and stirring for a preset second time to form a second component;
dividing the dispersing lubricant into two parts with equal mass, then mixing one part of the dispersing lubricant with the short fibers and the fine aggregate, and stirring for a preset third time to form a third component;
mixing the other part of the dispersed lubricant with the long fibers and the coarse aggregate, and stirring for a preset fourth time to form a fourth component;
mixing the first component and the third component, and stirring for a preset fifth time to form a fifth component;
mixing the fifth component and the second component, and stirring for a preset sixth time to form a sixth component;
and mixing the sixth component and the fourth component, and stirring for a preset seventh time to form the high-toughness concrete.
9. The high toughness concrete according to claim 1, wherein:
the first time period and the second time period are 1 minute;
the third time period, the fourth time period and the sixth time period are 2 minutes;
the fifth time period is 3 minutes;
the seventh length of time is 5 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105573A (en) * | 2021-11-23 | 2022-03-01 | 苏州大乘环保新材有限公司 | Water-based EAU high-barrier anticorrosive mortar |
| CN114988795A (en) * | 2022-05-24 | 2022-09-02 | 琼海瑞泽混凝土配送有限公司 | High-performance premixed concrete and preparation method thereof |
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| CN108748689A (en) * | 2018-06-08 | 2018-11-06 | 中冶建筑研究总院有限公司 | Material dispersal device and added in concrete a variety of scales fiber concrete mixing method |
| CN111287485A (en) * | 2020-02-15 | 2020-06-16 | 广州市芳村建筑工程有限公司 | Secondary structure anti-seepage and anti-leakage construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108748689A (en) * | 2018-06-08 | 2018-11-06 | 中冶建筑研究总院有限公司 | Material dispersal device and added in concrete a variety of scales fiber concrete mixing method |
| CN111287485A (en) * | 2020-02-15 | 2020-06-16 | 广州市芳村建筑工程有限公司 | Secondary structure anti-seepage and anti-leakage construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114105573A (en) * | 2021-11-23 | 2022-03-01 | 苏州大乘环保新材有限公司 | Water-based EAU high-barrier anticorrosive mortar |
| CN114988795A (en) * | 2022-05-24 | 2022-09-02 | 琼海瑞泽混凝土配送有限公司 | High-performance premixed concrete and preparation method thereof |
| CN114988795B (en) * | 2022-05-24 | 2023-12-22 | 琼海瑞泽混凝土配送有限公司 | High-performance ready-mixed concrete and preparation method thereof |
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