CN114105675A - Preparation method of foamed concrete and ground stone nondestructive paving design structure - Google Patents
Preparation method of foamed concrete and ground stone nondestructive paving design structure Download PDFInfo
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- CN114105675A CN114105675A CN202111496186.0A CN202111496186A CN114105675A CN 114105675 A CN114105675 A CN 114105675A CN 202111496186 A CN202111496186 A CN 202111496186A CN 114105675 A CN114105675 A CN 114105675A
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- 239000004575 stone Substances 0.000 title claims abstract description 65
- 239000011381 foam concrete Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 89
- 239000000843 powder Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000004088 foaming agent Substances 0.000 claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 38
- 239000010881 fly ash Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000005187 foaming Methods 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 235000021120 animal protein Nutrition 0.000 claims abstract description 17
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 17
- 239000011575 calcium Substances 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 25
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 17
- 230000005284 excitation Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- 239000002174 Styrene-butadiene Substances 0.000 claims description 11
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- 239000011115 styrene butadiene Substances 0.000 claims description 11
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 10
- 239000000920 calcium hydroxide Substances 0.000 claims description 10
- 229910052602 gypsum Inorganic materials 0.000 claims description 10
- 239000010440 gypsum Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 241000283690 Bos taurus Species 0.000 claims description 5
- 102000011782 Keratins Human genes 0.000 claims description 5
- 108010076876 Keratins Proteins 0.000 claims description 5
- 241001465754 Metazoa Species 0.000 claims description 5
- 241001494479 Pecora Species 0.000 claims description 5
- 239000011083 cement mortar Substances 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 239000003651 drinking water Substances 0.000 claims description 5
- 235000020188 drinking water Nutrition 0.000 claims description 5
- 239000012452 mother liquor Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 238000006467 substitution reaction Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 241001122767 Theaceae Species 0.000 abstract description 6
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 abstract description 6
- 239000006260 foam Substances 0.000 abstract description 6
- 239000001397 quillaja saponaria molina bark Substances 0.000 abstract description 6
- 229930182490 saponin Natural products 0.000 abstract description 6
- 150000007949 saponins Chemical class 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 6
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 5
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 5
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/0215—Flooring or floor layers composed of a number of similar elements specially adapted for being adhesively fixed to an underlayer; Fastening means therefor; Fixing by means of plastics materials hardening after application
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/0215—Flooring or floor layers composed of a number of similar elements specially adapted for being adhesively fixed to an underlayer; Fastening means therefor; Fixing by means of plastics materials hardening after application
- E04F15/02155—Adhesive means specially adapted therefor, e.g. adhesive foils or strips
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/08—Flooring or floor layers composed of a number of similar elements only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass
-
- 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
- C04B2111/40—Porous or lightweight materials
Abstract
The invention discloses a preparation method of foamed concrete and a ground stone nondestructive paving design structure, belonging to the technical field of concrete, wherein the preparation method comprises the following steps: step S1: weighing 4-7 parts by mass of high-calcium fly ash, 1-3 parts by mass of stone powder and 5-10 parts by mass of active regenerated micro powder, and putting the materials into a grinding machine to be ground to 800 meshes; step S2: 40-50 parts by mass of cement base and 30-40 parts by mass of deionized water are added into the mixture ground into fine powder in a stirrer for 700-850 r/min. In the invention, because the addition of a proper amount of animal protein can improve the surface viscosity of the lauryl sodium sulfate and the viscosity of liquid in a membrane, the improvement of foaming times and foaming stability is facilitated, in the process of modifying the compound liquid, a proper amount of tea saponin is added, the foam stabilizing function can be realized, the damage of foam is reduced, the toughness of a foam wall is increased, the viscosity in a foaming agent is increased, the work is increased during foaming, the foaming times are reduced, and the lauryl alcohol has the effect of improving a modified base material.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to a preparation method of foamed concrete and a ground stone nondestructive paving design structure.
Background
The foamed concrete is a heavy materialThe energy-saving heat-insulating material has a plurality of factors influencing the performance of the foamed concrete, wherein the influence of the foaming agent is particularly remarkable, the foamed concrete, namely the foamed concrete or the lightweight concrete, is a novel lightweight heat-insulating material containing a large number of closed air holes formed through natural curing, and the foamed concrete has the advantages of light weight, good heat-insulating performance, good durability, convenience in construction and the like. The foam concrete has good characteristics, is widely applied to energy-saving wall materials, and is also applied in other aspects. At present, the application of foam concrete in China is mainly roof foam concrete heat-insulating layer cast-in-place, foam concrete surface blocks, foam concrete light wall boards and foam concrete compensation foundations. However, the good characteristics of the foam concrete are fully utilized, the application field of the foam concrete in the building engineering can be continuously expanded, the engineering progress is accelerated, and the engineering quality is improved. And can also be used as a filling layer instead of concrete. Foam concrete is often used for concrete fill because of its great workability and adaptability due to the use of flexible hoses. However, the volume density of the common foamed concrete is 800-859kg/m3Compression strength is seriously lower than that for wherein the gas pocket is mostly the trompil, seriously influences the heat preservation effect, and surface cracking leads to absorbing a large amount of external moisture, makes the surface course material appear destroying such as mildening and rot. Meanwhile, at present, natural stones are less paved on the surface layer of the foamed concrete, the strength of the foamed concrete is lower, the water absorption performance is high, and the like.
Disclosure of Invention
The invention aims to: the preparation method of the foamed concrete and the ground stone nondestructive paving design structure are provided for solving the problems that at present, no better solution exists for the defects of less natural stones paved on a foamed concrete surface layer, lower self strength, strong water absorption and the like of the foamed concrete, the reliability of bonding of the bonding layer and the foamed concrete needs to be further observed, the stone hollowing and falling possibly occur in the later period, and the like, and the larger maintenance work possibly exists.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of foamed concrete comprises the following steps:
step S1: weighing 4-7 parts by mass of high-calcium fly ash, 1-3 parts by mass of stone powder and 5-10 parts by mass of active regenerated micro powder, and putting the materials into a grinding machine to be ground to 800 meshes;
step S2: adding 40-50 parts by mass of cement base material and 30-40 parts by mass of deionized water into the mixture ground into fine powder, stirring for 3-4min at 700-;
step S3: adding 10-15 parts by mass of modified foaming agent into the stirred slurry, and stirring for 6-9s in a high-speed stirrer at the stirring speed of 800-950 r/min;
step S4: after stirring and mixing evenly, injecting the slurry into a mould, and foaming and molding;
step S5: and (4) performing natural curing, steam curing or autoclaved curing after foaming and forming to finally obtain the foamed concrete.
As a further description of the above technical solution:
the modified foaming agent is modified from a compound liquid, and the preparation method of the compound liquid comprises the following steps:
step A1: injecting sodium dodecyl sulfate and deionized water into a constant-temperature magnetic heating stirrer, stirring for 1.5-2.5 minutes, and preparing sodium dodecyl sulfate mother liquor with the concentration of 1.25%;
step A2: then adding an animal protein foaming agent in a dropwise manner, and entering a compounding stage of the animal protein foaming agent and sodium dodecyl sulfate to obtain a compound liquid;
step A3: and finally, measuring the surface tension of the compound liquid by using a drop volume method, and testing the viscosity of the compound liquid by using a rheometer.
As a further description of the above technical solution:
the animal protein foaming agent is a common foaming agent prepared from keratin of animals such as cattle, sheep and the like as raw materials.
As a further description of the above technical solution:
the preparation method for modifying the compound liquid comprises the following steps:
step B1: stirring and mixing a proper amount of the mixture with deionized water, uniformly mixing to obtain a modified base material, and taking out for later use;
step B2: the compound liquid is firstly injected into a constant-temperature magnetic heating stirrer, and then the modified base material is added into the constant-temperature magnetic heating stirrer in a dropwise manner to obtain the modified foaming agent.
As a further description of the above technical solution:
the mixture comprises tea saponin, lauryl alcohol and hydroxyethyl cellulose, wherein the mixture comprises the following components in percentage by weight: 6: 7: 1.
As a further description of the above technical solution:
the preparation method of the high-calcium fly ash comprises the following steps:
step C1: taking fly ash as a raw material, mechanically grinding the fly ash to 388.14m-2/kg of specific area;
step C2: adding auxiliary materials to prepare the high-calcium fly ash.
As a further description of the above technical solution:
the auxiliary materials comprise clinker, gypsum and calcium hydroxide, and the proportion of the fly ash, the gypsum, the calcium hydroxide and the fly ash is 50 percent to 45 percent to 3 percent.
As a further description of the above technical solution:
the preparation method of the active regenerated micro powder comprises the following steps:
step D1: preparing the building waste into regenerated micro powder by using an ultramicro jet mill, wherein the particle size of the regenerated micro powder prepared by the ultramicro jet mill is distributed between 10 and 60 mu m;
step D2: carrying out activity excitation on the regenerated micro powder with different substitution rates by adopting a chemical excitation or physical excitation method;
the preparation method of the cement base material comprises the following steps:
step E1: firstly, adding a certain amount of polyvinyl alcohol and a proper amount of styrene-butadiene emulsion into deionized water, and mixing for 25-35min at normal temperature to ensure that the styrene-butadiene emulsion and the polyvinyl alcohol are fully mixed and swell to obtain a modified base material;
step E2: then pouring the cement and the sand into a stirrer, and stirring and mixing for 3-6min in a dry manner;
step E3: then, adding drinking water and a water reducing agent into the stirrer within a short time, and slowly stirring for 4 min;
step E4: and finally, injecting the modified base material into a stirrer, and quickly stirring for 2-3min until all the components of the cement mortar are uniformly distributed to obtain the cement base material.
The utility model provides a ground stone material of foaming concrete is harmless to be spread and pastes project organization, includes the stone material, the back of stone material is provided with the metal back plate, honeycomb holes have been seted up on the metal back plate is close to the one side of stone material to the position department that corresponds honeycomb holes on the opposite face of metal back plate and stone material still fills there is the binder.
As a further description of the above technical solution:
and gaps are reserved between the stone metal honeycomb back plates to ensure that the thickness of the stone metal honeycomb back plates is more than 5mm, a flexible rubber mat is arranged, and expansion joints are arranged around each stone.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, the foaming times of the compound liquid reach 106 times of those of a sodium dodecyl sulfate foaming agent, the foaming times are improved by 40% compared with that of a blank sample, meanwhile, the settling distance is reduced by 41.2%, and the bleeding amount is reduced by 21.6%, because the surface viscosity of sodium dodecyl sulfate and the viscosity of liquid in a film can be improved by adding a proper amount of animal protein, the improvement of the foaming times and the foaming stability are facilitated, in the process of modifying the compound liquid, a foam stabilizing function can be realized by adding a proper amount of tea saponin, the damage of foam is reduced, the toughness of a foam wall is increased, the thickening effect is realized by adding a proper amount of hydroxyethyl cellulose, the internal viscous force of the foaming agent is increased, the work is increased during foaming, the foaming times are reduced, and the lauryl alcohol has the effect of improving a modified base material.
2. The added high-calcium fly ash can improve the breaking strength and the compressive strength of the foamed concrete and has good sulfate erosion resistance strength loss rate and dry shrinkage rate.
3. In the invention, the active regenerated micro powder has the gelling activity and can effectively control the particle size distribution of the powder, the regenerated micro powder is used for replacing part of cement base materials to prepare the foam concrete, and the chemical gelling property of the regenerated micro powder and the physical enhancement effect caused by the controllable particle size of the powder are combined to realize the improvement of the strength of the foam concrete and the reduction of the cost.
4. In the invention, because the stone material paved on the foamed concrete surface layer is easy to break, the metal honeycomb back plate is added on the back surface of the stone material, the probability of breaking when the foamed concrete deforms is reduced through the strength of the metal back plate, the metal back plate is perforated, the stone binder fills the holes of the back plate to enhance the bonding strength with the surface layer stone, so as to prevent the stone from loosening and falling off, in order to meet the requirement of ground stone non-destructive paving, each stone is taken as a single body, and the physical properties of the stone and the foamed concrete, such as thermal expansion, cold contraction and the like, can occur, carry out size optimization to stone material metal honeycomb backplate, metal honeycomb panel size is less than the stone material, and it fills flexible adhesive tape to appear filling in the gap between the stone material is spread and is pasted the back, realizes that every stone material all has flexible gap all around, and the stone material is spread and is pasted the back and can not appear hollowing not hard up scheduling problem, stops the later stage basically and appears the maintenance.
5. According to the invention, the cement base material is added, and the styrene-butadiene emulsion and the polyvinyl alcohol are utilized to modify the plain cement, so that the content of internal microcracks of the foamed concrete after solidification can be reduced to a certain extent, and the physical and mechanical properties of the foamed concrete can be better improved, so that the foamed concrete can be prevented from cracking after solidification to a certain extent, the reaction degree of the foamed concrete is controlled, and the surface shrinkage is effectively controlled.
Drawings
FIG. 1 is a schematic view of the overall structure of a method for preparing foamed concrete and a design structure for ground stone non-destructive paving according to the present invention;
FIG. 2 is a schematic structural diagram of a side view of a preparation method of foamed concrete and a design structure of a ground stone nondestructive paving design according to the present invention;
fig. 3 is a schematic structural diagram of a metal back plate in a preparation method of foamed concrete and a ground stone nondestructive paving design structure provided by the invention.
Illustration of the drawings:
1. stone materials; 2. a metal back plate; 3. honeycomb holes; 4. a binder; 5. a flexible rubber mat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A preparation method of foamed concrete comprises the following steps:
step S1: weighing 4 parts by mass of high-calcium fly ash, 1 part by mass of stone powder and 5 parts by mass of active regenerated micro powder, and putting the materials into a grinding machine to be ground to 500 meshes;
step S2: adding 40 parts by mass of cement base material and 30 parts by mass of deionized water into the mixture ground into fine powder, stirring for 3min at 700r/min in a stirrer, and fully stirring to obtain slurry with good fluidity;
step S3: adding 10 parts by mass of modified foaming agent into the stirred slurry, and stirring for 6s in a high-speed stirrer at the stirring speed of 800 r/min;
step S4: after stirring and mixing evenly, injecting the slurry into a mould, and foaming and molding;
step S5: carrying out natural curing, steam curing or autoclaved curing after foaming and forming to finally prepare the foamed concrete;
the modified foaming agent is modified from a compound liquid, and the preparation method of the compound liquid comprises the following steps:
step A1: injecting sodium dodecyl sulfate and deionized water into a constant-temperature magnetic heating stirrer, stirring for 1.5 minutes, and preparing 1.25% sodium dodecyl sulfate mother liquor;
step A2: then adding an animal protein foaming agent in a dropwise manner, and entering a compounding stage of the animal protein foaming agent and sodium dodecyl sulfate to obtain a compound liquid;
step A3: finally, measuring the surface tension of the compound liquid by using a drop volume method, and testing the viscosity of the compound liquid by using a rheometer;
the animal protein foaming agent is a common foaming agent prepared from keratin of animals such as cattle, sheep and the like as raw materials;
the preparation method for modifying the compound liquid comprises the following steps:
step B1: stirring and mixing a proper amount of the mixture with deionized water, uniformly mixing to obtain a modified base material, and taking out for later use;
step B2: firstly, injecting the compound liquid into a constant-temperature magnetic heating stirrer, and then adding a modified base material into the constant-temperature magnetic heating stirrer in a dropwise manner to obtain a modified foaming agent;
the mixture comprises tea saponin, lauryl alcohol and hydroxyethyl cellulose, wherein the mixture comprises the following components in percentage by weight: 6: 7: 1;
the preparation method of the high-calcium fly ash comprises the following steps:
step C1: taking fly ash as a raw material, mechanically grinding the fly ash to 388.14m-2/kg of specific area;
step C2: adding auxiliary materials to prepare high-calcium fly ash;
the auxiliary materials comprise clinker, gypsum and calcium hydroxide, and the proportion of the fly ash, the gypsum, the calcium hydroxide and the fly ash is 50 percent to 45 percent to 3 percent;
the preparation method of the active regenerated micro powder comprises the following steps:
step D1: preparing the building waste into regenerated micro powder by using an ultramicro jet mill, wherein the particle size of the regenerated micro powder prepared by the ultramicro jet mill is distributed between 10 mu m;
step D2: carrying out activity excitation on the regenerated micro powder with different substitution rates by adopting a chemical excitation or physical excitation method;
the preparation method of the cement base material comprises the following steps:
step E1: firstly, adding a certain amount of polyvinyl alcohol and a proper amount of styrene-butadiene emulsion into deionized water, and mixing for 25-35min at normal temperature to ensure that the styrene-butadiene emulsion and the polyvinyl alcohol are fully mixed and swell to obtain a modified base material;
step E2: then pouring the cement and the sand into a stirrer, and stirring and mixing for 3-6min in a dry manner;
step E3: then, adding drinking water and a water reducing agent into the stirrer within a short time, and slowly stirring for 4 min;
step E4: and finally, injecting the modified base material into a stirrer, and quickly stirring for 2-3min until all the components of the cement mortar are uniformly distributed to obtain the cement base material.
The utility model provides an application of foaming concrete, includes stone material 1, the back of stone material 1 is provided with metal back plate 2, honeycomb holes 3 have been seted up on metal back plate 2 is close to the one side of stone material 1 to metal back plate 2 and the relative face of stone material 1 on the position department that corresponds honeycomb holes 3 still fill have binder 4.
Leave the seam between stone material 1 and the metal back plate 2 and ensure to reach more than 5mm, set up flexible cushion 5, every stone material 1 all has the expansion joint all around.
Example two
A preparation method of foamed concrete comprises the following steps:
step S1: weighing 5 parts by mass of high-calcium fly ash, 2 parts by mass of stone powder and 7 parts by mass of active regenerated micro powder, and putting the materials into a grinder to grind the materials to 650 meshes;
step S2: adding 45 parts by mass of cement base material and 35 parts by mass of deionized water into the mixture ground into fine powder, stirring for 3min at 800r/min in a stirrer, and fully stirring to obtain slurry with good fluidity;
step S3: adding 12 parts by mass of modified foaming agent into the stirred slurry, and stirring for 7s in a high-speed stirrer at the stirring speed of 900 r/min;
step S4: after stirring and mixing evenly, injecting the slurry into a mould, and foaming and molding;
step S5: carrying out natural curing, steam curing or autoclaved curing after foaming and forming to finally prepare the foamed concrete;
the modified foaming agent is modified from a compound liquid, and the preparation method of the compound liquid comprises the following steps:
step A1: injecting sodium dodecyl sulfate and deionized water into a constant-temperature magnetic heating stirrer, stirring for 2 minutes, and preparing sodium dodecyl sulfate mother liquor with the concentration of 1.25%;
step A2: then adding an animal protein foaming agent in a dropwise manner, and entering a compounding stage of the animal protein foaming agent and sodium dodecyl sulfate to obtain a compound liquid;
step A3: finally, measuring the surface tension of the compound liquid by using a drop volume method, and testing the viscosity of the compound liquid by using a rheometer;
the animal protein foaming agent is a common foaming agent prepared from keratin of animals such as cattle, sheep and the like as raw materials;
the preparation method for modifying the compound liquid comprises the following steps:
step B1: stirring and mixing a proper amount of the mixture with deionized water, uniformly mixing to obtain a modified base material, and taking out for later use;
step B2: firstly, injecting the compound liquid into a constant-temperature magnetic heating stirrer, and then adding a modified base material into the constant-temperature magnetic heating stirrer in a dropwise manner to obtain a modified foaming agent;
the mixture comprises tea saponin, lauryl alcohol and hydroxyethyl cellulose, wherein the mixture comprises the following components in percentage by weight: 6: 7: 1;
the preparation method of the high-calcium fly ash comprises the following steps:
step C1: taking fly ash as a raw material, mechanically grinding the fly ash to 388.14m-2/kg of specific area;
step C2: adding auxiliary materials to prepare high-calcium fly ash;
the auxiliary materials comprise clinker, gypsum and calcium hydroxide, and the proportion of the fly ash, the gypsum, the calcium hydroxide and the fly ash is 50 percent to 45 percent to 3 percent;
the preparation method of the active regenerated micro powder comprises the following steps:
step D1: preparing the building waste into regenerated micro powder by using an ultramicro jet mill, wherein the particle size of the regenerated micro powder prepared by the ultramicro jet mill is distributed between 40 mu m;
step D2: carrying out activity excitation on the regenerated micro powder with different substitution rates by adopting a chemical excitation or physical excitation method;
the preparation method of the cement base material comprises the following steps:
step E1: firstly, adding a certain amount of polyvinyl alcohol and a proper amount of styrene-butadiene emulsion into deionized water, and mixing for 25-35min at normal temperature to ensure that the styrene-butadiene emulsion and the polyvinyl alcohol are fully mixed and swell to obtain a modified base material;
step E2: then pouring the cement and the sand into a stirrer, and stirring and mixing for 3-6min in a dry manner;
step E3: then, adding drinking water and a water reducing agent into the stirrer within a short time, and slowly stirring for 4 min;
step E4: and finally, injecting the modified base material into a stirrer, and quickly stirring for 2-3min until all the components of the cement mortar are uniformly distributed to obtain the cement base material.
The utility model provides an application of foaming concrete, includes stone material 1, the back of stone material 1 is provided with metal back plate 2, honeycomb holes 3 have been seted up on metal back plate 2 is close to the one side of stone material 1 to metal back plate 2 and the relative face of stone material 1 on the position department that corresponds honeycomb holes 3 still fill have binder 4.
Leave the seam between stone material 1 and the metal back plate 2 and ensure to reach more than 5mm, set up flexible cushion 5, every stone material 1 all has the expansion joint all around.
EXAMPLE III
A preparation method of foamed concrete comprises the following steps:
step S1: weighing 7 parts by mass of high-calcium fly ash, 3 parts by mass of stone powder and 10 parts by mass of active regenerated micro powder, and putting the materials into a grinding machine to be ground to 800 meshes;
step S2: adding 50 parts by mass of cement base material and 40 parts by mass of deionized water into the mixture ground into fine powder, stirring for 4min at 850r/min in a stirrer, and fully stirring to obtain slurry with good fluidity;
step S3: adding 15 parts by mass of modified foaming agent into the stirred slurry, and stirring for 9s in a high-speed stirrer at the stirring speed of 950 r/min;
step S4: after stirring and mixing evenly, injecting the slurry into a mould, and foaming and molding;
step S5: carrying out natural curing, steam curing or autoclaved curing after foaming and forming to finally prepare the foamed concrete;
the modified foaming agent is modified from a compound liquid, and the preparation method of the compound liquid comprises the following steps:
step A1: injecting sodium dodecyl sulfate and deionized water into a constant-temperature magnetic heating stirrer, stirring for 2 minutes, and preparing sodium dodecyl sulfate mother liquor with the concentration of 1.25%;
step A2: then adding an animal protein foaming agent in a dropwise manner, and entering a compounding stage of the animal protein foaming agent and sodium dodecyl sulfate to obtain a compound liquid;
step A3: finally, measuring the surface tension of the compound liquid by using a drop volume method, and testing the viscosity of the compound liquid by using a rheometer;
the animal protein foaming agent is a common foaming agent prepared from keratin of animals such as cattle, sheep and the like as raw materials;
the preparation method for modifying the compound liquid comprises the following steps:
step B1: stirring and mixing a proper amount of the mixture with deionized water, uniformly mixing to obtain a modified base material, and taking out for later use;
step B2: firstly, injecting the compound liquid into a constant-temperature magnetic heating stirrer, and then adding a modified base material into the constant-temperature magnetic heating stirrer in a dropwise manner to obtain a modified foaming agent;
the mixture comprises tea saponin, lauryl alcohol and hydroxyethyl cellulose, wherein the mixture comprises the following components in percentage by weight: 6: 7: 1;
the preparation method of the high-calcium fly ash comprises the following steps:
step C1: taking fly ash as a raw material, mechanically grinding the fly ash to 388.14m-2/kg of specific area;
step C2: adding auxiliary materials to prepare high-calcium fly ash;
the auxiliary materials comprise clinker, gypsum and calcium hydroxide, and the proportion of the fly ash, the gypsum, the calcium hydroxide and the fly ash is 50 percent to 45 percent to 3 percent;
the preparation method of the active regenerated micro powder comprises the following steps:
step D1: preparing the building waste into regenerated micro powder by using an ultramicro jet mill, wherein the particle size of the regenerated micro powder prepared by the ultramicro jet mill is distributed between 60 mu m;
step D2: carrying out activity excitation on the regenerated micro powder with different substitution rates by adopting a chemical excitation or physical excitation method;
the preparation method of the cement base material comprises the following steps:
step E1: firstly, adding a certain amount of polyvinyl alcohol and a proper amount of styrene-butadiene emulsion into deionized water, and mixing for 25-35min at normal temperature to ensure that the styrene-butadiene emulsion and the polyvinyl alcohol are fully mixed and swell to obtain a modified base material;
step E2: then pouring the cement and the sand into a stirrer, and stirring and mixing for 3-6min in a dry manner;
step E3: then, adding drinking water and a water reducing agent into the stirrer within a short time, and slowly stirring for 4 min;
step E4: and finally, injecting the modified base material into a stirrer, and quickly stirring for 2-3min until all the components of the cement mortar are uniformly distributed to obtain the cement base material.
The utility model provides an application of foaming concrete, includes stone material 1, the back of stone material 1 is provided with metal back plate 2, honeycomb holes 3 have been seted up on metal back plate 2 is close to the one side of stone material 1 to metal back plate 2 and the relative face of stone material 1 on the position department that corresponds honeycomb holes 3 still fill have binder 4.
Leave the seam between stone material 1 and the metal back plate 2 and ensure to reach more than 5mm, set up flexible cushion 5, every stone material 1 all has the expansion joint all around.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The preparation method of the foamed concrete is characterized by comprising the following steps of:
step S1: weighing 4-7 parts by mass of high-calcium fly ash, 1-3 parts by mass of stone powder and 5-10 parts by mass of active regenerated micro powder, and putting the materials into a grinding machine to be ground to 800 meshes;
step S2: adding 40-50 parts by mass of cement base material and 30-40 parts by mass of deionized water into the mixture ground into fine powder, stirring for 3-4min at 700-;
step S3: adding 10-15 parts by mass of modified foaming agent into the stirred slurry, and stirring for 6-9s in a high-speed stirrer at the stirring speed of 800-950 r/min;
step S4: after stirring and mixing evenly, injecting the slurry into a mould, and foaming and molding;
step S5: and (4) performing natural curing, steam curing or autoclaved curing after foaming and forming to finally obtain the foamed concrete.
2. The method for preparing the foamed concrete according to claim 1, wherein the modified foaming agent is modified from a compound liquid, and the method for preparing the compound liquid comprises the following steps:
step A1: injecting sodium dodecyl sulfate and deionized water into a constant-temperature magnetic heating stirrer, stirring for 1.5-2.5 minutes, and preparing sodium dodecyl sulfate mother liquor with the concentration of 1.25%;
step A2: then adding an animal protein foaming agent in a dropwise manner, and entering a compounding stage of the animal protein foaming agent and sodium dodecyl sulfate to obtain a compound liquid;
step A3: and finally, measuring the surface tension of the compound liquid by using a drop volume method, and testing the viscosity of the compound liquid by using a rheometer.
3. The method for preparing foamed concrete according to claim 2, wherein the animal protein foaming agent is a conventional foaming agent prepared from keratin of animals such as cattle and sheep.
4. The preparation method of the foamed concrete according to claim 3, wherein the preparation method of the compound liquid modification comprises the following steps:
step B1: stirring and mixing a proper amount of the mixture with deionized water, uniformly mixing to obtain a modified base material, and taking out for later use;
step B2: the compound liquid is firstly injected into a constant-temperature magnetic heating stirrer, and then the modified base material is added into the constant-temperature magnetic heating stirrer in a dropwise manner to obtain the modified foaming agent.
5. The method for preparing the foaming concrete according to the claim 4, wherein the mixture comprises the following components in percentage by weight: 6: 7: 1.
6. The method for preparing the foamed concrete according to claim 5, wherein the method for preparing the high-calcium fly ash comprises the following steps:
step C1: taking fly ash as a raw material, mechanically grinding the fly ash to 388.14m-2/kg of specific area;
step C2: adding auxiliary materials to prepare the high-calcium fly ash.
7. The method for preparing the foamed concrete according to claim 6, wherein the auxiliary materials are clinker, gypsum and calcium hydroxide, and the ratio of the fly ash, the gypsum, the calcium hydroxide and the fly ash is 50% to 45% to 3%.
8. The method for preparing the foamed concrete according to claim 7, wherein the method for preparing the active recycled micro powder comprises the following steps:
step D1: preparing the building waste into regenerated micro powder by using an ultramicro jet mill, wherein the particle size of the regenerated micro powder prepared by the ultramicro jet mill is distributed between 10 and 60 mu m;
step D2: carrying out activity excitation on the regenerated micro powder with different substitution rates by adopting a chemical excitation or physical excitation method;
the preparation method of the cement base material comprises the following steps:
step E1: firstly, adding a certain amount of polyvinyl alcohol and a proper amount of styrene-butadiene emulsion into deionized water, and mixing for 25-35min at normal temperature to ensure that the styrene-butadiene emulsion and the polyvinyl alcohol are fully mixed and swell to obtain a modified base material;
step E2: then pouring the cement and the sand into a stirrer, and stirring and mixing for 3-6min in a dry manner;
step E3: then, adding drinking water and a water reducing agent into the stirrer within a short time, and slowly stirring for 4 min;
step E4: and finally, injecting the modified base material into a stirrer, and quickly stirring for 2-3min until all the components of the cement mortar are uniformly distributed to obtain the cement base material.
9. The ground stone nondestructive paving design structure of the foamed concrete according to the claims 1-8, characterized by comprising a stone (1), wherein a metal back plate (2) is arranged on the back surface of the stone (1), honeycomb holes (3) are formed in one surface of the metal back plate (2) close to the stone (1), and a bonding agent (4) is filled in the positions corresponding to the honeycomb holes (3) on the opposite surfaces of the metal back plate (2) and the stone (1).
10. The ground stone nondestructive paving design structure of the foamed concrete according to claim 9, wherein a gap is left between the stone (1) and the metal back plate (2) to ensure that the gap is more than 5mm, a flexible rubber pad (5) is arranged, and an expansion joint is arranged around each stone (1).
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