CN110642568A - Rapid preparation method of building concrete - Google Patents
Rapid preparation method of building concrete Download PDFInfo
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- CN110642568A CN110642568A CN201910877258.2A CN201910877258A CN110642568A CN 110642568 A CN110642568 A CN 110642568A CN 201910877258 A CN201910877258 A CN 201910877258A CN 110642568 A CN110642568 A CN 110642568A
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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
Abstract
The invention discloses a method for quickly preparing building concrete, which belongs to the technical field of concrete preparation, and can add fiber reinforced combination in the preparation process of the concrete, wherein the fiber particles in the fiber reinforced combination are smaller, the combination degree between the fiber reinforced combination and each raw material is better, so that the surface tensile strength of the concrete finished product is better, and the cracking is not easy to occur, when in use, because the wavy fiber belts can provide a certain fine expansion limit for the concrete finished product during vibration or cracking, on one hand, the tensile property of the concrete is improved, on the other hand, the integral strength of the concrete finished product can be effectively improved, the crack resistance and the vibration resistance of the concrete finished product are better, the service life of the concrete finished product is effectively prolonged, and the cracking of the concrete finished product caused by vibration and other conditions during the use process is effectively avoided, thereby effectively improving the safety.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to a rapid preparation method of building concrete.
Background
The common concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; hardened, i.e. hardened concrete or concrete. The concrete strength grade is divided into a cubic compressive strength standard value, and the Chinese common concrete strength grade is divided into 14 grades: c15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75 and C80.
The generalized concrete is an artificial stone prepared from a cementing material, coarse and fine aggregates, water and other additives according to a proper proportion. In civil engineering, the most widely used is the ordinary concrete: the cement concrete is prepared by taking cement as a cementing material and sand and stone as aggregate and adding water for stirring. In concrete, sand and stone act as a framework, called aggregate; the cement and water form cement paste, and the cement paste wraps the surface of the aggregate and fills gaps of the aggregate. Before hardening, the cement slurry plays a role in lubrication, so that the mixture is endowed with certain workability, and the construction is convenient. After the cement slurry is hardened, the aggregate is cemented into a solid whole.
The existing concrete has rich raw materials and low cost; good plasticity; high strength; the durability is good; available reinforcing bar reinforcing, but its fragility is very big, and antidetonation and stretching resistance are relatively poor, and when using, the condition that often can take place fracture, fracture or even bursting apart leads to the life of concrete to receive certain influence, and simultaneously, the concrete piece that the concrete bursts apart in the use still can cause certain threat to passerby's safety.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a method for quickly preparing building concrete, which can ensure that the surface tensile strength of a concrete finished product is better and the cracking is not easy to occur by adding a fiber reinforced combination in the preparation process of the concrete, wherein the fiber particles in the fiber reinforced combination are smaller, and the combination degree between the fiber reinforced combination and each raw material is better, and when in use, a wavy fiber band can provide a certain fine expansion limit for the concrete finished product due to vibration or cracking, so that on one hand, the tensile property of the concrete is improved, on the other hand, the integral strength of the concrete finished product can be effectively improved, the anti-cracking and anti-vibration capabilities of the concrete finished product are better, the service life of the concrete finished product is effectively prolonged, and the cracking of the concrete finished product due to vibration and other conditions in the use process is effectively avoided, thereby effectively improving the safety.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A method for quickly preparing building concrete comprises the following ingredients in parts by mass: 50-130 parts of water, 150-220 parts of ordinary portland cement, 30-50 parts of river downstream natural sandstone, 15-20 parts of gravel, 20-25 parts of fly ash, 5-15 parts of fiber reinforced composite and 5-10 parts of concrete additive, wherein the preparation method comprises the following steps:
s1, weighing the prepared raw materials according to the mass ratio;
s2, adding water, ordinary portland cement, gravel, river downstream natural gravel and fly ash into a stirrer, and stirring and mixing uniformly to obtain primary concrete;
s3, adding the fiber reinforced combination into the uniformly mixed primary concrete, and stirring again to obtain intermediate concrete;
s4, pouring the medium-grade concrete into a required mould according to the requirement, and demoulding to obtain a concrete semi-finished product;
and S5, cutting and molding the semi-finished concrete product, and performing autoclaved curing to obtain the finished concrete product.
Can be through adding the fibre reinforced combination in the preparation process at the concrete, fibre grain in the fibre reinforced combination is less, its and each raw materials between the conjugation degree better, and then make the finished product of concrete's surface tensile strength better, the difficult condition that takes place the fracture, when using, because vibrations or fracture, wavy fibrous zone can provide certain slight flexible limit for the finished product of concrete, improve the tensile property of concrete on the one hand, on the other hand can effectively improve the holistic intensity of this finished product of concrete, make its anti crack and anti-seismic ability all better, and then effectively prolong the finished product of concrete's life, and then effectively avoid the finished product of concrete to appear the condition of bursting apart because the circumstances such as vibrations appear in the use, thereby effectively improve the security.
Furthermore, the concrete additive comprises a silane waterproof agent, an antifreezing agent, a rust inhibitor and a setting water reducing agent, wherein the silane waterproof agent can reduce the water permeability of the concrete under hydrostatic pressure, the antifreezing agent can harden the concrete at negative temperature and can achieve enough antifreezing and strength within a specified time, the rust inhibitor can inhibit or reduce the corrosion of reinforcing steel bars or other pre-buried metals in the concrete, and the setting water reducing agent has the functions of setting retardation and water reducing, can effectively improve the functions of permeation resistance, freezing resistance, rust resistance and the like of the produced concrete, and enables the quality of the produced concrete finished product to be higher.
Further, the adding proportion of the silane waterproof agent, the antifreezing agent, the rust inhibitor and the retarding and water reducing agent is 1:1-1.2:0.5-1.3: 1.
Furthermore, the rotating speed of the stirrer in the S3 is shorter than the stirring time in the S2, the rotating speed of the stirrer is also slower than that in the S2, the rotating speeds of the stirrer in the S2 and the stirrer in the S3 are 60-70r/min and 30-40r/min respectively, the stirring times of the stirrer in the S2 and the stirrer in the S3 are 40-50min and 20-25min respectively, and when the S3 is carried out, the primary concrete is uniformly stirred, and at the moment, only the added fiber reinforcement combination needs to be uniformly mixed, so that the stirring time can be set to be shorter, the preparation efficiency is improved, and meanwhile, as the fiber belts in the fiber reinforcement combination need to be kept in a wavy shape in a concrete finished product, the rotating speed is too fast, the fiber bags are subjected to a large centrifugal force, and are straightened, and the effect of a certain expansion limit provided when the concrete is fractured or cracked in the later period is damaged.
Further, after the stirring time in the step S2 is over half, the weighed concrete additive is added into the mixer, and the mixing is continued until the stirring time is over, and heat is generated due to collision and friction in the mixing process of the raw materials at the early stage, so that the situation that the effect is damaged due to the fact that the concrete additive is added at the middle and later stages can be effectively avoided under the long-time high-temperature environment.
Furthermore, the broken stone can be natural broken stone and broken stone with larger stones, the particle size of the broken stone is 0.3-0.5cm, the particle size of the broken stone can be used as aggregate, the particle size is too large, the setting force is poor, the broken stone is easy to crack in a later concrete finished product, the quality of the concrete finished product is poor, certain potential safety hazards are easily caused, and the overall strength of the concrete finished product is not high due to too small particle size.
Furthermore, the fiber reinforced combination comprises a fiber band and fiber particles, the fiber particles are small, the combination degree of the fiber band and the fiber particles is better, the surface tensile strength of the concrete finished product is further better, and cracking is not easy to occur, the combination ratio of the fiber band and the fiber particles is 1:2-3, the fiber band and the fiber particles are prepared by mixing glass fibers, carbon fibers and tensile fibers according to the ratio of 1:1:1, the overall strength of the concrete finished product can be effectively improved through the glass fibers, the carbon fibers and the tensile fibers, the cracking resistance and the tensile resistance of the concrete finished product are improved, and the service life of the concrete finished product is prolonged.
Furthermore, the fiber band includes the tensile telescopic band, the tensile telescopic band is woven by vertically and horizontally staggered's horizontal cellosilk and vertical cellosilk and forms, and the tensile telescopic band is wavy, and when the concrete finished product was using, because vibrations or during the fracture, wavy fiber band can provide certain slight flexible limit for the concrete, improves the tensile property of concrete on the one hand, and on the other hand can effectively improve the holistic intensity of this concrete finished product, makes its anti-crack and anti-seismic ability all better, and then effectively prolongs the off-the-shelf life of concrete.
Further, all be connected with the double-end connecting rod between every adjacent wave on the tensile telescopic band, the double-end connecting rod includes a plurality of horizontal fiber wire drawing and a plurality of fibre wire drawing of interweaving of each other structure as an organic whole, under the restraint of double-end connecting rod, can effectively guarantee that most tensile telescopic band can keep wavy at the stirring in-process, and then effectively guarantee that this concrete finished product can have better tensile, antidetonation and anti-cracking performance.
Further, it is a plurality of the fibre wire drawing of interweaving is fluffy form structure that scatters for the area of contact increase of fibre wire drawing of interweaving and tensile telescopic band, and form the space of interweaving between a plurality of fibre wire drawing of interweaving, because the existence in space of interweaving makes the contact range increase of fibre wire drawing of interweaving and tensile telescopic band, and then effectively improve the joint strength between fibre wire drawing of interweaving and the tensile telescopic band, further improve the joint degree between double-end connecting rod and the tensile telescopic band, make it difficult quilt damage in the mixing process, improve the later stage fibre band and provide the effect of certain elasticity to the concrete finished product.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme can be through adding the fibre in the preparation process of concrete and reinforce the combination, fibre grain in the fibre reinforcement combination is less, its and each raw materials between the conjugation degree better, and then make the finished product of concrete's surperficial tensile strength better, the difficult condition that takes place the fracture, when using, because vibrations or fracture, wavy fibrous zone can provide certain slight flexible limit for the finished product of concrete, improve the tensile property of concrete on the one hand, on the other hand can effectively improve the holistic intensity of this finished product of concrete, make its anti crack and anti-seismic ability all better, and then effectively prolong the finished product of concrete's life, and then effectively avoid the finished product of concrete in the use because the condition such as vibrations appear the condition of bursting apart, thereby effectively improve the security.
(2) The concrete additive comprises a silane waterproof agent, an antifreezing agent, a rust inhibitor and a setting water reducing agent, wherein the silane waterproof agent can reduce the water permeability of the concrete under hydrostatic pressure, the antifreezing agent can harden the concrete at negative temperature and can achieve enough antifreezing and strength within a specified time, the rust inhibitor can inhibit or reduce the corrosion of reinforcing steel bars or other pre-buried metals in the concrete, and the setting water reducing agent has the functions of setting delay and reducing water, can effectively improve the functions of permeation resistance, freezing resistance, rust resistance and the like of the produced concrete, so that the quality of the produced concrete finished product is higher.
(3) The adding proportion of the silane waterproofing agent, the antifreezing agent, the rust inhibitor and the retarding and water reducing agent is 1:1-1.2:0.5-1.3: 1.
(4) The rotating speed of the stirrer in the S3 is shorter than that in the S2, the rotating speed of the stirrer is also slower than that in the S2, the rotating speeds of the stirrers in the S2 and the S3 are 60-70r/min and 30-40r/min respectively, and the stirring times of the stirrers in the S2 and the S3 are 40-50min and 20-25min respectively, when the S3 is carried out, the primary concrete is uniformly stirred, and at the moment, only the added fiber reinforcement combination needs to be uniformly mixed, so that the stirring time can be set to be shorter, the preparation efficiency is accelerated, and meanwhile, as the fiber belts in the fiber reinforcement combination need to be kept in a wavy shape in a concrete finished product, the rotating speed is too fast, the fiber bags can be straightened due to the large centrifugal force, and the fiber bags can be torn, and the effect of a certain expansion limit provided when the concrete is broken or cracked in the later period.
(5) And after the stirring time in the S2 is over half, adding the weighed concrete additive into the stirrer, and continuing stirring until the stirring time is over, wherein the early-stage mixing process of the raw materials generates heat due to collision and friction, so that the concrete additive is added in the middle and later stages, and the condition that the effect is damaged due to long-time high-temperature environment can be effectively avoided.
(6) The broken stone can be natural broken stone and broken stone with larger stones, the particle size of the broken stone is 0.3-0.5cm, the particle size of the broken stone can be used as aggregate, the particle size is too large, the condensation force is poor, the broken stone is extremely easy to crack in a later concrete finished product, the quality of the concrete finished product is poor, certain potential safety hazard is easily caused, the particle size is too small, and the overall strength of the concrete finished product is not high easily.
(7) The fiber reinforced combination comprises a fiber band and fiber particles, the fiber particles are small, the combination degree of the fiber band and the fiber particles with the raw materials is good, the surface tensile strength of a concrete finished product is good, and cracking is not prone to occurring, the combination ratio of the fiber band and the fiber particles is 1:2-3, the fiber band and the fiber particles are prepared by mixing glass fibers, carbon fibers and tensile fibers according to the ratio of 1:1:1, the overall strength of the concrete finished product can be effectively improved through the glass fibers, the carbon fibers and the tensile fibers, the anti-cracking tensile property of the concrete finished product is improved, and the service life of the concrete finished product is prolonged.
(8) The fibrous zone includes the tensile telescopic band, the tensile telescopic band is woven by vertically and horizontally staggered's horizontal cellosilk and vertical cellosilk and forms, and the tensile telescopic band is wavy, when the concrete product is using, because when vibrations or fracture, the fibrous zone of wavy can provide certain slight flexible limit for the concrete, improve the tensile property of concrete on the one hand, on the other hand can effectively improve the holistic intensity of this concrete product, make its anti-crack and anti-seismic ability all better, and then effectively prolong the off-the-shelf life of concrete.
(9) All be connected with the double-end connecting rod between every adjacent wave on the tensile telescopic band, the double-end connecting rod includes a plurality of horizontal fiber wire drawing and a plurality of fibre wire drawing of interweaving of each other structure as an organic whole, under the restraint of double-end connecting rod, can effectively guarantee that most tensile telescopic bands can keep wavy in the stirring process, and then effectively guarantee that this concrete finished product can have better tensile, antidetonation and anti-cracking performance.
(10) A plurality of fibre wire drawing of interweaving are fluffy form structure that loosens, make the area of contact increase of fibre wire drawing and tensile telescopic band interweave, and form the space of interweaving between a plurality of fibre wire drawing of interweaving, because the existence in space of interweaving makes the contact range increase of fibre wire drawing and tensile telescopic band interweave, and then effectively improve the joint strength between fibre wire drawing and the tensile telescopic band interweave, further improve the joint degree between double-end connecting rod and the tensile telescopic band, make it difficult quilt damage at the stirring in-process, improve the later stage fibre band and provide the effect of certain elasticity to the concrete finished product.
Drawings
FIG. 1 is a principal flow diagram of the present invention;
FIG. 2 is a schematic structural view of a partial section of a concrete product of the present invention
FIG. 3 is a schematic representation of the principal three-dimensional structure of the fiber tape of the present invention;
FIG. 4 is a schematic top view of a fibrous tape of the present invention;
FIG. 5 is a schematic structural diagram of the double-ended connecting rod of the present invention.
The reference numbers in the figures illustrate:
1 tensile stretch band, 11 transverse fiber yarns, 12 longitudinal fiber yarns, 2 double-end connecting rods, 21 horizontal fiber drawing wires, 22 interweaved fiber drawing wires and 23 interweaved gaps.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a method for rapidly preparing building concrete includes the following ingredients in parts by mass: 50-130 parts of water, 150-220 parts of ordinary portland cement, 30-50 parts of river downstream natural sandstone, 15-20 parts of gravel, 20-25 parts of fly ash, 5-15 parts of fiber reinforced composite and 5-10 parts of concrete additive, wherein the preparation method comprises the following steps:
s1, weighing the prepared raw materials according to the mass ratio;
s2, adding water, ordinary portland cement, gravel, river downstream natural gravel and fly ash into a stirrer, and stirring and mixing uniformly to obtain primary concrete;
s3, adding the fiber reinforced combination into the uniformly mixed primary concrete, and stirring again to obtain intermediate concrete;
s4, pouring the medium-grade concrete into a required mould according to the requirement, and demoulding to obtain a concrete semi-finished product;
and S5, cutting and molding the semi-finished concrete product, and performing autoclaved curing to obtain the finished concrete product.
The concrete additive comprises a silane waterproofing agent, an antifreezing agent, a rust inhibitor and a set-retarding water reducing agent, wherein the silane waterproofing agent can reduce the water permeability of concrete under hydrostatic pressure, the antifreezing agent can harden the concrete at negative temperature and can achieve enough antifreezing and strength within a specified time, the rust inhibitor can inhibit or reduce the corrosion of reinforcing steel bars or other pre-buried metals in the concrete, the set-retarding water reducing agent has the functions of setting retardation and reducing water, the functions of permeation resistance, freezing resistance, rust resistance and the like of the produced concrete can be effectively improved, the quality of the produced concrete finished product is higher, and the adding ratio of the silane waterproofing agent, the antifreezing agent, the rust inhibitor and the set-retarding water reducing agent is 1:1-1.2:0.5-1.3: 1.
The rotating speed of the stirrer in the S3 is shorter than that in the S2, the rotating speed of the stirrer is also slower than that in the S2, the rotating speeds of the stirrers in the S2 and the S3 are 60-70r/min and 30-40r/min respectively, and the stirring times of the stirrers in the S2 and the S3 are 40-50min and 20-25min respectively, when the S3 is carried out, the primary concrete is uniformly stirred, and at the moment, only the added fiber reinforcement combination needs to be uniformly mixed, so that the stirring time can be set to be shorter, the preparation efficiency is accelerated, and meanwhile, as the fiber belts in the fiber reinforcement combination need to be kept in a wavy shape in a concrete finished product, the rotating speed is too fast, the fiber bags can be straightened due to the large centrifugal force, and the fiber bags can be torn, and the effect of a certain expansion limit provided when the concrete is broken or cracked in the later period.
After the stirring time is over half in S2, adding the weighed concrete additive into the stirrer, and continuing stirring until the stirring time is over, wherein the heating can be generated due to collision and friction in the mixing process of the raw materials in the early stage, so the concrete additive is added in the middle and later stages, the condition that the effect is damaged due to long-time high-temperature environment can be effectively avoided, the broken stones can be natural broken stones and broken stones with larger stones, the particle size of the broken stones is 0.3-0.5cm, the particle size of the broken stones can be used as aggregates, the particle size is too large, the coagulation force is poor, the broken stones are easy to crack in the concrete finished product in the later stage, the quality of the concrete finished product is poor, meanwhile, certain potential safety hazards are easy to cause, the particle size is too small, and the overall strength of the concrete finished product is not high.
Referring to fig. 2, the fiber reinforced composite includes a fiber tape and fiber particles, the fiber particles are smaller and have better bonding degree with the raw materials, so that the surface tensile strength of the concrete product is better, and cracking is not easy to occur, the combination ratio of the fiber tape and the fiber particles is 1:2-3, the fiber tape and the fiber particles are prepared by mixing glass fibers, carbon fibers and tensile fibers according to a ratio of 1:1:1, and the overall strength of the concrete product can be effectively improved through the glass fibers, the carbon fibers and the tensile fibers, so that the crack resistance and the tensile property of the concrete product are improved, and the service life of the concrete product is prolonged.
Referring to fig. 3-4, the fiber band includes a tensile expansion band 1, the tensile expansion band 1 is woven by criss-cross transverse fiber filaments 11 and longitudinal fiber filaments 12, the tensile expansion band 1 is wavy, and a double-end connecting rod 2 is connected between every two adjacent waves on the tensile expansion band 1.
Referring to fig. 5, the double-headed connecting rod 2 includes a plurality of horizontal fiber drawing wires 21 and a plurality of interlaced fiber drawing wires 22 which are integrated with each other, and under the constraint of the double-headed connecting rod 2, it can be effectively ensured that most of the tensile stretch bands 1 can keep wavy in the stirring process, and further the concrete finished product can have better tensile, shock-resistant and crack-resistant properties, the interlaced fiber drawing wires 22 are fluffy and scattering-shaped structures, so that the contact area between the interlaced fiber drawing wires 22 and the tensile stretch bands 1 is increased, and interlaced gaps 23 are formed between the interlaced fiber drawing wires 22, because of the existence of the interlaced gaps 23, the contact range between the interlaced fiber drawing wires 22 and the tensile stretch bands 1 is increased, and further the connection strength between the interlaced fiber drawing wires 22 and the tensile stretch bands 1 is effectively improved, and the joint degree between the double-headed connecting rod 2 and the tensile stretch bands 1 is further improved, make it difficult quilt damage in the stirring process, improve the later stage fibre area and provide the effect of certain elasticity to the concrete finished product.
Can be through adding the fibre reinforced combination in the preparation process at the concrete, fibre grain in the fibre reinforced combination is less, its and each raw materials between the conjugation degree better, and then make the finished product of concrete's surface tensile strength better, the difficult condition that takes place the fracture, when using, because vibrations or fracture, wavy fibrous zone can provide certain slight flexible limit for the finished product of concrete, improve the tensile property of concrete on the one hand, on the other hand can effectively improve the holistic intensity of this finished product of concrete, make its anti crack and anti-seismic ability all better, and then effectively prolong the finished product of concrete's life, and then effectively avoid the finished product of concrete to appear the condition of bursting apart because the circumstances such as vibrations appear in the use, thereby effectively improve the security.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (10)
1. A method for quickly preparing building concrete is characterized by comprising the following steps: the concrete comprises the following ingredients in parts by mass: 50-130 parts of water, 150-220 parts of ordinary portland cement, 30-50 parts of river downstream natural sandstone, 15-20 parts of gravel, 20-25 parts of fly ash, 5-15 parts of fiber reinforced composite and 5-10 parts of concrete additive, wherein the preparation method comprises the following steps:
s1, weighing the prepared raw materials according to the mass ratio;
s2, adding water, ordinary portland cement, gravel, river downstream natural gravel and fly ash into a stirrer, and stirring and mixing uniformly to obtain primary concrete;
s3, adding the fiber reinforced combination into the uniformly mixed primary concrete, and stirring again to obtain intermediate concrete;
s4, pouring the medium-grade concrete into a required mould according to the requirement, and demoulding to obtain a concrete semi-finished product;
and S5, cutting and molding the semi-finished concrete product, and performing autoclaved curing to obtain the finished concrete product.
2. The method for rapidly preparing the building concrete according to claim 1, which is characterized in that: the concrete additive comprises a silane waterproof agent, an antifreezing agent, a rust inhibitor and a set water reducing agent.
3. The method for rapidly preparing the building concrete according to claim 2, which is characterized in that: the adding proportion of the silane waterproof agent, the antifreezing agent, the rust inhibitor and the retarding and water reducing agent is 1:1-1.2:0.5-1.3: 1.
4. The method for rapidly preparing the building concrete according to claim 1, which is characterized in that: the rotating speed of the stirrer in the S3 is shorter than the stirring time in the S2, the rotating speed of the stirrer is also slower than that in the S2, the rotating speeds of the stirrer in the S2 and the stirrer in the S3 are respectively 60-70r/min and 30-40r/min, and the stirring time in the S2 and the stirring time in the S3 are respectively 40-50min and 20-25 min.
5. The method for rapidly preparing the building concrete according to claim 4, which is characterized in that: and after the stirring time in the S2 is over half, adding the weighed concrete additive into the stirrer, and continuing stirring until the stirring time is over.
6. The method for rapidly preparing the building concrete according to claim 1, which is characterized in that: the crushed stone can be natural crushed stone or crushed stone with larger stones, and the particle size of the crushed stone is 0.5-0.8 cm.
7. The method for rapidly preparing the building concrete according to claim 1, which is characterized in that: the fiber reinforced combination comprises a fiber tape and fiber particles, the combination ratio of the fiber tape to the fiber particles is 1:2-3, and the fiber tape and the fiber particles are prepared by mixing glass fibers, carbon fibers and tensile fibers according to the ratio of 1:1: 1.
8. The method for rapidly preparing the building concrete according to claim 7, which is characterized in that: the fiber band comprises a tensile telescopic band (1), the tensile telescopic band (1) is formed by weaving criss-cross transverse fiber yarns (11) and longitudinal fiber yarns (12), and the tensile telescopic band (1) is wavy.
9. The method for rapidly preparing the building concrete according to claim 8, wherein the method comprises the following steps: all be connected with double-end connecting rod (2) between every adjacent wave on tensile telescopic band (1), double-end connecting rod (2) are including a plurality of horizontal fibre wire drawing (21) and a plurality of fibre wire drawing (22) of interweaving of each other body structure.
10. The method for rapidly preparing the building concrete according to claim 9, which is characterized in that: the plurality of interwoven fiber drawn wires (22) are of a fluffy and scattered structure, and interwoven gaps (23) are formed among the plurality of interwoven fiber drawn wires (22).
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