阅读说明：本技术 一种高强度混凝土板材及其成型工艺 (High-strength concrete plate and forming process thereof ) 是由 何海明 陈卫民 顾海华 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种高强度混凝土板材及其成型工艺,属于建筑材料技术领域,本发明可以通过在混凝土成型前在原料内混合上热膨胀微球,采用预埋的方式直接镶嵌于板材内,在模具内固化成型的时候,首先采用外部施压的方式,其次通过加热触发热膨胀微球在混凝土内部的膨胀动作,从而在内部形成多点的挤压,配合上外部施压可以有效提高混凝土的密实度,同时热膨胀微球可以在膨胀后实现永久定形,不仅可以避免与混凝土的剥离,同时可以充当粗骨料对板材进行显著增强,一方面提高混凝土板材的静态荷载能力,另一方面在面对外界较大的冲击时,可以通过分散的方式进行卸压,从而对混凝土板材进行有效保护,间接提高混凝土板材的强度。(The invention discloses a high-strength concrete plate and a forming process thereof, belonging to the technical field of building materials, the invention can mix thermal expansion microspheres in raw materials before the concrete is formed, the thermal expansion microspheres are directly embedded in the plate in a pre-embedded mode, when the concrete is cured and formed in a mould, firstly, an external pressure application mode is adopted, secondly, the expansion action of the thermal expansion microspheres in the concrete is triggered by heating, so that multi-point extrusion is formed in the concrete, the compactness of the concrete can be effectively improved by matching with the external pressure application, meanwhile, the thermal expansion microspheres can realize permanent shaping after expansion, not only can be prevented from being peeled from the concrete, but also can be used as coarse aggregate to remarkably strengthen the plate, on one hand, the static load capacity of the concrete plate is improved, on the other hand, when the plate is subjected to larger impact by the outside, the pressure can be relieved by a dispersed mode, thereby effectively protecting the concrete plate and indirectly improving the strength of the concrete plate.)

1. A high strength concrete panel which characterized in that: the material comprises the following raw materials in parts by weight: 200 portions of ordinary portland cement, 50-80 portions of mineral powder, 50-80 portions of fly ash, 500 portions of crushed stone, 250 portions of sand, 100 portions of glass beads, 200 portions of water, 4-8 portions of polycarboxylic acid water reducing agent, 1-3 portions of anti-cracking fiber and 200 portions of thermal expansion microspheres.

2. A high strength concrete panel according to claim 1, wherein: the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3.

3. A high strength concrete panel according to claim 1, wherein: the fly ash is F-class II fly ash, and the density is 2150Kg/m 3.

4. A high strength concrete panel according to claim 1, wherein: the broken stone is 5-20mm continuous graded impact broken stone, the content of needle sheets is not more than 5%, the content of mud is not more than 0.5%, the content of mud blocks is not more than 0.2%, wherein the parent rock is basalt or limestone, and the compressive strength of the parent rock is not less than 130 MPa.

5. A high strength concrete panel according to claim 1, wherein: the sand is II-zone sand with fineness modulus of 2.7-3.0, MB value is less than 1.4, stone powder content is not more than 4%, and mud block content is not more than 0.5%.

6. A high strength concrete panel according to claim 1, wherein: the heat expansion microsphere comprises a pressing coat (1), a resistance film (2), a shaping film (3) and a plurality of balloon manufacturing bodies (4) from outside to inside in sequence, shear thickening liquid is filled between the material pressing coat (1) and the resistance film (2), a secondary curing material is filled between the resistance film (2) and the shaping film (3), a plurality of fixing rods (5) are connected between the balloon (4) and the shaping film (3), a plurality of elastic threads which are uniformly distributed are connected between the material pressing coat (1) and the resistance film (2) and between the resistance film (2) and the shaping film (3), the outer surface of the shaping film (3) is connected with a plurality of thin glass ball sheets (6) corresponding to the balloon (4), and water and a plurality of uniformly distributed trigger needles (7) are arranged in the thin glass sphere sheet (6), and the trigger needles (7) are connected with the shaping film (3).

7. The high strength concrete panel according to claim 6, wherein: system balloon (4) are including disintegration hemisphere (41), support hemisphere (42) and divide gas perforated plate (43), disintegration hemisphere (41) and support hemisphere (42) symmetric connection, divide gas perforated plate (43) to connect in supporting hemisphere (42) opening part, it is filled with the powdery material of thermal decomposition release gas to support hemisphere (42) intussuseption.

8. The high strength concrete panel according to claim 7, wherein: the disintegration hemisphere (41) is made of hot melt materials, the supporting hemisphere (42) is made of hard materials, and the pores in the gas distribution porous plate (43) are smaller than the particle size of the powdery substances.

9. The high strength concrete panel according to claim 6, wherein: the material pressing coat (1), the resistance film (2) and the setting film (3) are all made of elastic materials, the strength of the material pressing coat (1) is higher than that of the resistance film (2) and the setting film (3), and the secondary curing material is ordinary portland cement.

10. A process for forming a high strength concrete panel according to any one of claims 1 to 9, wherein: the method comprises the following steps:

s1, weighing the raw materials according to the formula, and uniformly mixing to obtain slurry for later use;

s2, binding two reinforcing meshes with 14mm threaded steel bars, and mounting the reinforcing meshes into a forming die in advance;

s3, pouring a sizing material after the demoulding oil is coated, fully vibrating uniformly, closing the die, pressurizing, feeding materials after 5-10S, and maintaining the pressure;

s4, heating the die to 50-60 ℃, triggering the expansion action of the thermal expansion microspheres, and forcing the slurry to be fully dense;

and S5, demolding after molding, taking out the product, polishing, maintaining, and stacking and warehousing after the maintenance.

Technical Field

The invention relates to the technical field of building materials, in particular to a high-strength concrete plate and a forming process thereof.

Background

Concrete, concrete for short: refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.

Concrete is one of the most important civil engineering materials of the present generation. The artificial stone is prepared by a cementing material, granular aggregate (also called aggregate), water, an additive and an admixture which are added if necessary according to a certain proportion, and is formed by uniformly stirring, compacting, forming, curing and hardening.

The concrete has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, that is shipbuilding, machinery industry, ocean development, geothermal engineering, etc., but also concrete is an important material.

The concrete slab is characterized in that a concrete slab is formed by a plurality of concrete slabs, wherein the concrete slabs are arranged on the concrete slab, and the concrete slab is formed by a plurality of concrete slabs, wherein the concrete slabs are arranged on the concrete slab, wherein the concrete slabs are common in the building field, and although the existing concrete slabs have higher strength, the concrete slabs only show that the concrete slab is insufficient in strength when suffering from higher dynamic impact under static pressure load, and the concrete slab is inevitably subjected to problems in process, raw materials and construction in the forming process, so that the compactness of the concrete during forming is insufficient, and the strength is.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a high-strength concrete plate and a forming process thereof, which can mix thermal expansion microspheres in raw materials before the concrete is formed, directly embed the thermal expansion microspheres in the plate in a pre-embedded mode, firstly adopt an external pressure applying mode and secondly trigger the expansion action of the thermal expansion microspheres in the concrete by heating when the concrete is cured and formed in a mould, thereby forming multi-point extrusion in the concrete, effectively improving the compactness of the concrete by matching with the external pressure applying mode, simultaneously realizing permanent shaping after the thermal expansion microspheres are expanded, not only avoiding the stripping from the concrete, but also obviously enhancing the plate by serving as coarse aggregate, on one hand, improving the static load capacity of the concrete plate, and on the other hand, releasing pressure by a dispersing mode when large impact is faced to the outside, thereby effectively protecting the concrete plate and indirectly improving the strength of the concrete plate.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A high-strength concrete plate comprises the following raw materials in parts by weight: 200 portions of ordinary portland cement, 50-80 portions of mineral powder, 50-80 portions of fly ash, 500 portions of crushed stone, 250 portions of sand, 100 portions of glass beads, 200 portions of water, 4-8 portions of polycarboxylic acid water reducing agent, 1-3 portions of anti-cracking fiber and 200 portions of thermal expansion microspheres.

Further, the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3.

Further, the fly ash is class F class II fly ash, and the density is 2150Kg/m 3.

Furthermore, the crushed stone is 5-20mm continuous graded impact crushed stone, the content of needle sheets is not more than 5%, the content of mud is not more than 0.5%, the content of mud blocks is not more than 0.2%, wherein the parent rock is basalt or limestone, and the compressive strength of the parent rock is not less than 130 MPa.

Furthermore, the sand is II-zone sand with fineness modulus of 2.7-3.0, MB value is less than 1.4, stone powder content is not more than 4%, and mud block content is not more than 0.5%.

Further, the heat expansion microsphere sequentially comprises a pressing coat, a resistance film, a setting film and a plurality of balloon manufacturing from outside to inside, shear thickening liquid is filled between the pressing coat and the resistance film, secondary curing material is filled between the resistance film and the setting film, a plurality of fixing rods are connected between the balloon manufacturing and the setting film, a plurality of elastic wires which are uniformly distributed are connected between the pressing coat and the resistance film and between the resistance film and the setting film, a plurality of thin glass sphere pieces corresponding to the balloon manufacturing are connected on the outer surface of the setting film, water and a plurality of trigger needles which are uniformly distributed are arranged in the thin glass sphere pieces and connected with the setting film, after the balloon manufacturing is heated to react and release a large amount of gas, the space in the setting film is inflated on one hand, and the setting film, the resistance film and the pressing coat are forced to sequentially expand outwards to extrude the raw materials, on the other hand, the cylinder punctures the thin glass sphere through the trigger needle to trigger the curing action of the secondary curing material, and the expanded permanent setting is realized.

Further, the system balloon is including the hemisphere that disintegrates, support hemisphere and divide the gas perforated plate, the hemisphere that disintegrates and support hemisphere symmetric connection, it connects in supporting hemisphere opening part to divide the gas perforated plate, it has the powdery material of thermal decomposition release gas to support the hemisphere intussuseption, and the hemisphere that disintegrates can show the reduction in intensity after meeting heat, can break through the stopping of the hemisphere that disintegrates under the dispersion of gas perforated plate to the air current and begin to aerify and strike thin glass sphere piece.

Furthermore, the disintegration hemisphere is made of hot melt materials, the supporting hemisphere is made of hard materials, and the pores in the gas distribution porous plate are smaller than the particle size of the powdery substances.

Furthermore, the pressing coat, the resistance film and the setting film are all made of elastic materials, the strength of the pressing coat is higher than that of the resistance film and the setting film, and the secondary curing material is ordinary portland cement.

A forming process of a high-strength concrete plate comprises the following steps:

s1, weighing the raw materials according to the formula, and uniformly mixing to obtain slurry for later use;

s2, binding two reinforcing meshes with 14mm threaded steel bars, and mounting the reinforcing meshes into a forming die in advance;

s3, pouring a sizing material after the demoulding oil is coated, fully vibrating uniformly, closing the die, pressurizing, feeding materials after 5-10S, and maintaining the pressure;

s4, heating the die to 50-60 ℃, triggering the expansion action of the thermal expansion microspheres, and forcing the slurry to be fully dense;

and S5, demolding after molding, taking out the product, polishing, maintaining, and stacking and warehousing after the maintenance.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can mix thermal expansion microspheres in raw materials before concrete molding, directly inlay the thermal expansion microspheres in the plate in a pre-embedded mode, and when the thermal expansion microspheres are cured and molded in a mold, firstly, an external pressure applying mode is adopted, secondly, the expansion action of the thermal expansion microspheres in the concrete is triggered by heating, so that multi-point extrusion is formed in the concrete, the compactness of the concrete can be effectively improved by matching with external pressure, meanwhile, the heat expansion microspheres can realize permanent setting after expansion, not only can avoid stripping from concrete, meanwhile, the concrete plate can be used as a coarse aggregate to remarkably strengthen the plate, on one hand, the static load capacity of the concrete plate is improved, on the other hand, when the concrete plate is subjected to large impact to the outside, can carry out the release through the mode of dispersion to effectively protect concrete panel, indirectly improve concrete panel's intensity.

(2) The heat expansion microsphere sequentially comprises a pressing coat, a resistance film, a setting film and a plurality of balloon manufacturing, wherein shear thickening liquid is filled between the pressing coat and the resistance film, secondary curing material is filled between the resistance film and the setting film, a plurality of fixing rods are connected between the balloon manufacturing and the setting film, a plurality of elastic filaments which are uniformly distributed are connected between the pressing coat and the resistance film and between the resistance film and the setting film, a plurality of thin glass sphere sheets corresponding to the balloon manufacturing are connected on the outer surface of the setting film, water and a plurality of trigger needles which are uniformly distributed are arranged in the thin glass sphere sheets and connected with the setting film, after the balloon manufacturing is heated to react and release a large amount of gas, on one hand, the space in the setting film is inflated, the setting film, the resistance film and the pressing coat are forced to sequentially expand outwards to extrude the raw material, on the other hand, the barrel punctures the thin glass sphere sheets through the trigger needles to trigger the curing action of the secondary, and realizing permanent setting after expansion.

(3) The system balloon is including the hemisphere that disintegrates, support hemisphere and branch gas perforated plate, and the hemisphere that disintegrates and support hemisphere symmetric connection divide the gas perforated plate to connect in supporting hemisphere opening part, and support hemisphere intussuseption is filled with the powdered material that meets thermal decomposition release gas, and the hemisphere that disintegrates meets heat back intensity can show and reduce, can break through the stopping of the hemisphere that disintegrates under the dispersion of gas flow at the branch gas perforated plate and begin to aerify and strike thin glass sphere piece.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a thermally expandable microsphere of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of a balloon according to the present invention;

FIG. 5 is a schematic view showing the flow before and after expansion of the thermally expandable microspheres of the present invention.

The reference numbers in the figures illustrate:

1 pressing coat, 2 resistance film, 3 shaping film, 4 balloon, 41 disintegration hemisphere, 42 support hemisphere, 43 gas distribution porous plate, 5 fixed rod, 6 thin glass sphere sheet and 7 trigger needle.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope 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 high-strength concrete slab comprises the following raw materials in parts by weight: 150 parts of ordinary portland cement, 50 parts of mineral powder, 50 parts of fly ash, 400 parts of broken stone, 200 parts of sand, 100 parts of glass beads, 180 parts of water, 4 parts of polycarboxylic acid water reducing agent, 1 part of anti-crack fiber and 150 parts of thermal expansion microspheres.

The mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3.

The fly ash is F class II fly ash, and the density is 2150Kg/m 3.

The broken stone is 5-20mm continuous graded impact broken stone, the content of needle sheets is not more than 5%, the content of mud is not more than 0.5%, the content of mud blocks is not more than 0.2%, wherein the parent rock is basalt or limestone, and the compressive strength of the parent rock is not less than 130 MPa.

The sand is II-zone sand with fineness modulus of 2.7-3.0, MB value is less than 1.4, stone powder content is not more than 4%, and mud block content is not more than 0.5%.

Referring to fig. 2-3, the thermal expansion microsphere sequentially comprises a pressing coat 1, a resistance film 2, a shaping film 3 and a plurality of balloon 4 from outside to inside, wherein a shear thickening liquid is filled between the pressing coat 1 and the resistance film 2, the shear thickening liquid can be obviously hardened when being impacted and has ultrahigh strength to resist external impact, a secondary curing material is filled between the resistance film 2 and the shaping film 3, a plurality of fixing rods 5 are connected between the balloon 4 and the shaping film 3, a plurality of uniformly distributed elastic wires are connected between the pressing coat 1 and the resistance film 2 and between the resistance film 2 and the shaping film 3, the elastic wires can assist in keeping the same gap as far as possible between the pressing coat 1, the resistance film 2 and the shaping film 3, so as to realize uniform expansion and improve the overall extrusion effect of raw materials, a plurality of thin glass sphere sheets 6 corresponding to the balloon 4 are connected on the outer surface of the shaping film 3, the thin glass sphere piece 6 is internally provided with water and a plurality of trigger needles 7 which are uniformly distributed, the trigger needles 7 are connected with the setting film 3, on one hand, the trigger needles 7 can fully puncture the thin glass sphere piece 6 to enable the thin glass sphere piece to be uniformly crushed and then be embedded in a secondary curing material for reinforcement, on the other hand, under the impact action of gas in the balloon 4, the trigger needles can shake and stir in the secondary curing material and the water to improve the curing effect, after the balloon 4 is heated to react and release a large amount of gas, on the one hand, the space in the setting film 3 is inflated, the setting film 3, the resistance film 2 and the pressing coat 1 are forced to sequentially expand outwards to extrude the raw materials, on the other hand, the cylinder punctures the thin glass sphere piece 6 through the trigger needles 7 to trigger the curing action of the secondary curing material, and the expanded permanent setting is.

Referring to fig. 4, the balloon 4 includes a disassembled hemisphere 41, a supporting hemisphere 42 and a gas distribution porous plate 43, the disassembled hemisphere 41 and the supporting hemisphere 42 are symmetrically connected, the gas distribution porous plate 43 is connected to an opening of the supporting hemisphere 42, the supporting hemisphere 42 is filled with a powdery substance, such as ammonium bicarbonate, which decomposes and releases gas when heated, the strength of the disassembled hemisphere 41 is significantly reduced when heated, and the gas distribution porous plate 43 breaks through the barrier of the disassembled hemisphere 41 to start inflation and impact the thin glass sheet 6 under the dispersing action of the gas distribution porous plate 43 on the gas flow.

The disintegration hemisphere 41 is made of a hot melt material such as dental model wax, the support hemisphere 42 is made of a hard material, and the pores of the gas-distributing porous plate 43 are smaller than the particle size of the powdery substance.

The material pressing coat 1, the resistance film 2 and the setting film 3 are all made of elastic materials, the strength of the material pressing coat 1 is higher than that of the resistance film 2 and the setting film 3, the secondary curing material is ordinary portland cement, and the formula of the material pressing coat and the formula of the setting film can be the same as that of a plate under the condition that the conditions allow.

A forming process of a high-strength concrete plate comprises the following steps:

s1, weighing the raw materials according to the formula, and uniformly mixing to obtain slurry for later use;

s2, binding two reinforcing meshes with 14mm threaded steel bars, and mounting the reinforcing meshes into a forming die in advance;

s3, pouring a sizing material after the demoulding oil is coated, fully vibrating uniformly, closing the die, pressurizing, feeding materials after 5-10S, and maintaining the pressure;

s4, heating the die to 50-60 ℃, triggering the expansion action of the thermal expansion microspheres, and forcing the slurry to be fully dense;

and S5, demolding after molding, taking out the product, polishing, maintaining, and stacking and warehousing after the maintenance.

Example 2:

a high-strength concrete plate comprises the following raw materials in parts by weight: 175 parts of ordinary portland cement, 65 parts of mineral powder, 65 parts of fly ash, 450 parts of broken stone, 225 parts of sand, 110 parts of glass beads, 190 parts of water, 6 parts of a polycarboxylic acid water reducing agent, 2 parts of anti-crack fibers and 175 parts of thermal expansion microspheres.

The remainder was in accordance with example 1.

Example 3:

a high-strength concrete plate comprises the following raw materials in parts by weight: 200 parts of ordinary portland cement, 80 parts of mineral powder, 80 parts of fly ash, 500 parts of crushed stone, 250 parts of sand, 120 parts of glass beads, 200 parts of water, 8 parts of polycarboxylic acid water reducing agent, 3 parts of anti-crack fibers and 200 parts of thermal expansion microspheres.

The remainder was in accordance with example 1.

Referring to fig. 5, the invention can be directly embedded in the slab by mixing the thermal expansion microspheres in the raw materials before the concrete is formed, and when the concrete is cured and formed in the mold, firstly, the external pressure is applied, secondly, the expansion action of the thermal expansion microspheres in the concrete is triggered by heating, so that multi-point extrusion is formed in the concrete, the compactness of the concrete can be effectively improved by matching with external pressure, meanwhile, the heat expansion microspheres can realize permanent setting after expansion, not only can avoid stripping from concrete, meanwhile, the concrete plate can be used as a coarse aggregate to remarkably strengthen the plate, on one hand, the static load capacity of the concrete plate is improved, on the other hand, when the concrete plate is subjected to large impact to the outside, can carry out the release through the mode of dispersion to effectively protect concrete panel, indirectly improve concrete panel's intensity.

The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.