CN113152777A - Fabricated concrete brick based on machine-made sand material and preparation method thereof - Google Patents
Fabricated concrete brick based on machine-made sand material and preparation method thereof Download PDFInfo
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- CN113152777A CN113152777A CN202110443790.0A CN202110443790A CN113152777A CN 113152777 A CN113152777 A CN 113152777A CN 202110443790 A CN202110443790 A CN 202110443790A CN 113152777 A CN113152777 A CN 113152777A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
- E04C1/41—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts composed of insulating material and load-bearing concrete, stone or stone-like material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/386—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2/42—Walls having cavities between, as well as in, the elements; Walls of elements each consisting of two or more parts, kept in distance by means of spacers, at least one of the parts having cavities
- E04B2/44—Walls having cavities between, as well as in, the elements; Walls of elements each consisting of two or more parts, kept in distance by means of spacers, at least one of the parts having cavities using elements having specially-designed means for stabilising the position; Spacers for cavity walls
- E04B2/46—Walls having cavities between, as well as in, the elements; Walls of elements each consisting of two or more parts, kept in distance by means of spacers, at least one of the parts having cavities using elements having specially-designed means for stabilising the position; Spacers for cavity walls by interlocking of projections or inserts with indentations, e.g. of tongues, grooves, dovetails
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/39—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
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- Electromagnetism (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building materials, in particular to an assembly type concrete brick based on a machine-made sand material and a preparation method thereof. On one hand, the concrete bricks are quickly connected and assembled, the positioning precision is high, the connection is stable and compact, the concrete bricks are suitable for later-stage expanded construction, and on the other hand, the preparation method provided by the invention ensures the strength of the brick body, and the concrete bricks are light in weight, high in compressive strength, good in bearing capacity, simple in installation and operation and practical in significance.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an assembly type concrete brick based on a machine-made sand material and a preparation method thereof.
Background
At present, concrete bricks are adopted for building energy conservation in China to replace clay red bricks, but in the application process, the wall bodies built by perforated bricks are separated and hollowly due to insufficient connection fastness, and stepped cracks and other defects are formed on partial wall bodies;
in addition, when concrete bricks are required to be arranged at positions around the pipeline, switch boxes matched with the pipeline and the cable are usually required to be processed on the concrete bricks to be placed in the accommodating grooves or the circuit pipes so as to clamp the pipeline and the cable in a clamping manner and avoid mutual interference of the concrete brick body with the pipeline and the cable, however, the existing concrete bricks are usually of standard brick structures and need to be grooved in a manual cutting manner in a construction site, the brick loss is large, a large amount of dust and noise pollution are generated, the construction efficiency is low, and the labor cost and the material cost are increased;
further, the concrete brick adopts a formula of pure cement and river sand, the formula ensures the early strength and the template turnover rate of the concrete brick, but the pure cement formula not only consumes a large amount of cement, but also is easy to crack under the condition of large consumption due to concentrated heat of hydration peaks, and environmental pressure is increased due to the large amount of river sand used.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an assembled concrete brick based on a machine-made sand material and a preparation method thereof, which are used for solving the problems.
An assembly type concrete brick based on a machine-made sand material comprises a brick body, wherein tenon-and-mortise structures for splicing are respectively arranged at two ends of the brick body, a plurality of inserting blocks are arranged at intervals in the middle of the lower surface of the brick body, inserting grooves for inserting the inserting blocks are arranged on the upper surface of the brick body in a matching manner, a plurality of vertical through holes are formed in one side of the inserting blocks of the brick body at intervals in a penetrating manner, and an additional material inserting cavity is formed in the other side of the inserting blocks of the brick body;
the upper surface of the brick body is provided with a flash tank around the slot, and the top of the slot is also provided with a guide groove communicated with the flash tank;
a plurality of transverse through holes are formed in the two end faces of the brick body at intervals from top to bottom on one side close to the vertical through holes, and the transverse through holes are communicated with the vertical through holes.
Preferably, tenon fourth of twelve earthly branches structure includes public tenon strip and female tongue-and-groove that set up respectively at brick body both ends, public tenon strip includes a plurality of draw bars that the surface set up about running through in brick body one end, female tongue-and-groove includes a plurality of spouts that the surface matches the setting with the draw bar about running through at the brick body other end.
Preferably, one or more of a thermal insulation material, a flame retardant material or a sound insulation material is inserted into the additional material insertion cavity.
Preferably, the number of the slots is three, the flash grooves are arranged around the peripheries of the three slots, and the depth of the flash grooves is not less than three-fourths of the depth of the slots.
Preferably, the cross sections of the slot and the insertion block are both straight slot type.
Preferably, the section of the insertion block is smaller than that of the slot, a plurality of alignment convex ribs are symmetrically arranged on the side face of the insertion block, and the distance between the alignment convex ribs is in clearance fit with the slot section specification.
Preferably, the concrete brick is prepared according to the following method comprising:
a. preparing the following raw materials in parts by weight:
350 parts of cement-250-one-material, 30-80 parts of fly ash, 30-80 parts of gneiss sheet machine-made sandstone powder, 840 parts of machine-made sand-one-material, 1000 parts of machine-made coarse aggregate-800-one-material, 270 parts of water-230-one-material, 1-2 parts of early strength agent, 6-8 parts of modifier, 3-7 parts of bentonite, 25-50 parts of steel fiber, 2-6 parts of polypropylene fiber, 30-60 parts of metakaolin, 5-10 parts of water reducer and 0.2-0.5 part of cellulose ether;
b. hydrogen peroxide, acetic acid and water are prepared into pretreatment liquid according to the weight ratio of 10:2:120, machine-made sandstone is put into the pretreatment liquid for immersion treatment for 15-25 minutes and then filtered, then a coupling agent solution with the aggregate mass of about 2-3% is sprayed into the pretreated sandstone, and the pretreated sandstone is dried for 2 hours at the temperature of 160 ℃ of an oven after being uniformly stirred to obtain modified machine-made sand, wherein the weight percentage of a silane coupling agent in the coupling agent solution is 4-6%, and the pH value of the coupling agent solution is adjusted to 4.5-5.5 by acid;
c. stirring cement, fly ash and gneiss machine-made sandstone powder in a forced stirrer for 2-5min to obtain a mixture A, adding the modified machine-made sandstone, polypropylene fiber, steel fiber, bentonite and metakaolin into the mixture A, stirring for 5-10min to obtain a mixture B, adding a modifier into water, heating in a water bath until all components are melted to form a homogeneous solution, stirring and cooling to 18-22 ℃, sequentially adding the mixture B, a water reducing agent, an early strength agent and the rest water, and stirring for 4-7min to obtain machine-made sand concrete for later use;
d. structural design mould according to the concrete brick, clearance mould surface, assemble the mould, and pour the mould into with the mechanism sand concrete that the stirring is good after applying paint the release agent with a brush, the vibration makes it closely knit, receive the face processing to the mechanism sand concrete surface after closely knit, use plastic film to cover the mechanism sand concrete after receiving the face, avoid mechanism sand concrete surface to lose water too fast, when closing on the initial set, carry out compaction plastering on the concrete surface, carry out the water spray maintenance to the mechanism sand concrete surface after the compaction plastering earlier, and cover and keep mechanism sand concrete surface moist state to concrete final set, obtain prefab initial product, break away from prefab initial product and mould, maintain the prefab initial product of drawing of patterns, specifically include: delivering into curing room, maintaining at 20 + -2 deg.C for 3-4h, providing steam, heating at 22-24 deg.C/h for 1.5-2h, maintaining at 60 + -3 deg.C for 8-10h, and naturally cooling for 1.5-2 h.
Preferably, the mass ratio of the fly ash to the gneiss machine-made sandstone powder is 1: 1;
the content of the bentonite is not more than 0.8 percent of the weight of the concrete cementing material, and the content of the metakaolin is not more than 10 percent of the weight of the concrete cementing material.
Preferably, the machine-made sand is a mixture of limestone machine-made sand, granite machine-made sand and diabase machine-made sand according to a weight ratio of 5:3:1, the fineness modulus of the machine-made sand is 2.8-3.2, the particle size is 0.15-5.0mm, the machine-made coarse aggregate is waste stone chips with the particle size of 5-10mm obtained by crushing limestone ore, and the water reducing agent is a polycarboxylic acid water reducing agent.
Preferably, the early strength agent comprises calcium formate, and the modifier is a mixture of polyvinyl alcohol, dispersible latex powder, vinyl acetate-ethylene copolymer and hydroxypropyl methyl cellulose according to the ratio of 1:4:2: 2.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides an assembly type concrete brick firstly, which realizes the bidirectional splicing between the transverse direction and the longitudinal direction, effectively improves the pressure resistance and the impact resistance of a finally formed wall body, ensures the transverse and longitudinal stability through a tenon-and-mortise structure transversely and longitudinally in a splicing mode, is also suitable for the existing worker wall building process, and greatly improves the assembly efficiency;
(2) the concrete brick is originally designed, and particularly, a vertical through hole formed in one side of an insert block and transverse through holes formed in two end faces are provided, so that the design integrates two outstanding functions, on one hand, the vertical through hole and the transverse through holes are matched and arranged to form a complete wiring or pipe-running channel on an inner wall surface, the defect of manual grooving in the wiring process of the conventional electric wire and water pipe is overcome, meanwhile, the flatness and the structural strength of the inner wall surface are not influenced, on the other hand, the vertical through hole and the transverse through holes can provide insertion of reinforcing steel bars, ropes or other reinforcing or blocking parts, destructive insertion of the conventional wall body when steel cables or reinforcing steel bars are needed as reinforcing units is avoided, and the building construction speed is greatly improved;
(3) the transverse and longitudinal connecting structure effectively improves the assembly precision, further ensures the connectivity of the vertical through hole and the transverse through hole, reduces the weight and the cost on the premise of ensuring the concrete strength, further can perform expansibility use on a concrete brick by the aid of the inserting cavity, realizes sound insulation or heat preservation of a wall body, and avoids the risk of aging and falling caused by the fact that the conventional heat preservation material is arranged on the outer wall surface in a sticking or gluing mode.
(4) The invention provides a preparation method of a concrete brick, which reduces the hydration heat in the concrete curing process by proportioning the special components of stone powder and fly ash, thereby reducing or even eliminating cracks generated in the concrete curing process, simultaneously, the addition of the stone powder in proportion refines the aperture, reduces the porosity, has wider particle size distribution and generates better cohesive force by the crystal nucleus effect of the stone powder, improves the compactness and the durability of mortar, simultaneously, the mechanical sand adopted has stable grade control by the special proportioning of parent metal, further improves the fluidity and the dispersibility of sandstone in the concrete by a coupling agent after modifying the mechanical sand, improves the compatibility among the components by the added modifier, delays the hydration reaction and the pozzolanic reaction of cement materials, has the retarding effect, effectively improves the interface structure and the breaking strength of high-strength concrete materials, meanwhile, after the formed concrete is dried, the sand and stone are protected, the corrosion of alkaline substances in the concrete is prevented, the alkali aggregate reaction is slowed down, the strength of the concrete brick is effectively improved by the added steel fibers and polypropylene fibers, the folding strength and the compressive strength of the concrete are improved by the bentonite with special proportion, the possibility of water seepage and poor cohesiveness of the concrete is also reduced, and the strength of the concrete brick is further improved on the premise of ensuring the slump of the concrete by adding metakaolin in balance.
The significant advances and the outstanding benefits of the present invention over the prior art are further elucidated in the examples section.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a top perspective view of a fabricated concrete block based on a engineered sand material according to the present invention;
FIG. 2 is a bottom view of an inverted 45 degree perspective of a fabricated concrete block based on a machine-made sand material according to the present invention;
FIG. 3 is a bottom view of a fabricated concrete block based on a machined sand material according to the present invention;
figure 4 is a top view of a fabricated concrete block based on a engineered sand material of the present invention.
Detailed Description
The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments, and it is to be understood 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 1
Referring to fig. 1-4, the present embodiment provides a fabricated concrete block based on machine-made sand material, including:
the brick comprises a brick body 1, wherein tenon-and-mortise structures for splicing are respectively arranged at two ends of the brick body 1, the tenon-and-mortise structure in the embodiment comprises a male tenon strip 2 and a female mortise 3 which are respectively arranged at two ends of the brick body, the male tenon strip 2 comprises three sliding strips 21 which are arranged at one end of the brick body and penetrate through the upper surface and the lower surface, the female mortise 3 comprises three sliding grooves 31 which are arranged at the other end of the brick body and penetrate through the upper surface and the lower surface and are matched with the sliding strips, the sliding strips 21 are rectangular in the embodiment, and can be of a trapezoid shape or a dovetail shape, and details are not described herein;
in this embodiment, the brick body 1 is provided with a plurality of insertion blocks 4 at intervals in the middle of the lower surface thereof, and the upper surface thereof is provided with slots 5 into which the insertion blocks 4 are inserted in a matching manner, the number of the insertion blocks 4 and the number of the slots 5 in this embodiment are three, and the cross sections of the slots 5 and the insertion blocks 4 in this embodiment are straight slot type;
the section of the insert block 4 in the embodiment is smaller than that of the slot 5, the side face of the insert block 4 is symmetrically provided with a plurality of alignment convex ribs 41, the distance between each pair of alignment convex ribs 41 is in clearance fit with the specification of the slot section, and the alignment convex ribs 41 in the embodiment are symmetrically arranged on each insert block 4 along the left and right directions and the up and down directions, so that the matching precision of concrete bricks can be effectively improved, and vertical through holes or horizontal through holes are effectively communicated;
particularly, the invention innovatively arranges a flash chute 8 on the upper surface of the brick body 1 around the slot 5, the top of the slot 5 is also provided with a guide groove 51 communicated with the flash chute 8, the design is matched with the matching arrangement of the insert block 4 and the slot 5, so that the adhesive material injected into the slot 5 in advance when the upper and lower concrete bricks are assembled with each other, for example, cement paste overflows along with the sinking of the insert 4, and enters the overflow chute 8 through the guide groove 51 after overflowing, so that the bonding effectiveness of the upper concrete brick and the lower concrete brick is ensured on one hand, meanwhile, unevenness of contact surfaces of an upper concrete brick and a lower concrete brick caused by overflowing materials cannot occur, so that final stability and assembling accuracy are not affected, and the fact that the depth of the overflow chute 8 is not less than three-fourths of the depth of the slot 5 also ensures that the overflowing adhesive cannot affect other modules, such as the vertical through hole 6, so as to achieve the purpose;
in the embodiment, the brick body 1 is provided with a plurality of vertical through holes 6 at one side of the insertion block 4 at intervals, and the other side is provided with an additional material insertion cavity 7; in the embodiment, one or more of heat insulation materials, flame retardant materials or sound insulation materials are inserted into the additional material insertion cavity 7, and a user can insert the additional material according to the type of the additional material insertion cavity according to the required occasions, so that the integrated design of wall surface heat insulation, sound insulation and flame retardance is realized;
a plurality of transverse through holes 9 are formed in the two end faces of the brick body at intervals from top to bottom on one side close to the vertical through hole 6, and the transverse through holes 9 are communicated with the vertical through hole 6.
Example 2
This example provides the formulation components for the concrete block of example 1, including: 350 parts of cement-250-one-material, 30-80 parts of fly ash, 30-80 parts of gneiss sheet-rock machine-made sandstone powder, 840 parts of machine-made sand-one-material, 1000 parts of machine-made coarse aggregate-800-one-material, 270 parts of water-230-one-material, 1-2 parts of early strength agent, 6-8 parts of modifier, 3-7 parts of bentonite, 25-50 parts of steel fiber, 2-6 parts of polypropylene fiber, 30-60 parts of metakaolin, 5-10 parts of water reducer and 0.2-0.5 part of cellulose ether.
In the value range of the embodiment, the components can be randomly mixed, but the most preferable mass ratio of the fly ash to the gneiss machine-made sandstone powder is 1:1, at the moment, the mixing ratio of the fly ash and the gneiss powder can reduce the hydration heat in the concrete curing process, so that cracks generated in the concrete curing process are reduced or even eliminated, meanwhile, the addition of the stone powder in proportion refines the aperture, the porosity is reduced, the particle size distribution of the stone powder is wider, the crystal nucleus effect of the stone powder generates better cohesive force, and the compactness and the durability of the mortar are improved;
in the embodiment, the content of the components is determined to ensure that the content of the bentonite is not more than 0.8 percent of the weight of the concrete cementing material, and the content of the metakaolin is not more than 10 percent of the weight of the concrete cementing material.
In the embodiment, the machine-made sand is a mixture of limestone machine-made sand, granite machine-made sand and diabase machine-made sand according to a weight ratio of 5:3:1, the fineness modulus of the machine-made sand is 2.8-3.2, the particle size is 0.15-5.0mm, the machine-made coarse aggregate is waste rock chips with the particle size of 5-10mm and crushed limestone ore, and the water reducing agent is a polycarboxylic acid water reducing agent.
The early strength agent in the embodiment comprises calcium formate, and the modifier is a mixture of polyvinyl alcohol, dispersible latex powder, vinyl acetate-ethylene copolymer and hydroxypropyl methyl cellulose in a ratio of 1:4:2: 2.
Example 3
This example provides a method of making a concrete block as in example 1, comprising the steps of:
a. raw materials were prepared according to the component ratios in example 2;
b. hydrogen peroxide, acetic acid and water are prepared into pretreatment liquid according to the weight ratio of 10:2:120, machine-made sandstone is put into the pretreatment liquid for immersion treatment for 15-25 minutes and then filtered, then a coupling agent solution with the aggregate mass of about 2-3% is sprayed into the pretreated sandstone, and the pretreated sandstone is dried for 2 hours at the temperature of 160 ℃ of an oven after being uniformly stirred to obtain modified machine-made sand, wherein the weight percentage of a silane coupling agent in the coupling agent solution is 4-6%, and the pH value of the coupling agent solution is adjusted to 4.5-5.5 by acid;
c. stirring cement, fly ash and gneiss machine-made sandstone powder in a forced stirrer for 2-5min to obtain a mixture A, adding the modified machine-made sandstone, polypropylene fiber, steel fiber, bentonite and metakaolin into the mixture A, stirring for 5-10min to obtain a mixture B, adding a modifier into water, heating in a water bath until all components are melted to form a homogeneous solution, stirring and cooling to 18-22 ℃, sequentially adding the mixture B, a water reducing agent, an early strength agent and the rest water, and stirring for 4-7min to obtain machine-made sand concrete for later use;
d. structural design mould according to the concrete brick, clearance mould surface, assemble the mould, and pour the mould into with the mechanism sand concrete that the stirring is good after applying paint the release agent with a brush, the vibration makes it closely knit, receive the face processing to the mechanism sand concrete surface after closely knit, use plastic film to cover the mechanism sand concrete after receiving the face, avoid mechanism sand concrete surface to lose water too fast, when closing on the initial set, carry out compaction plastering on the concrete surface, carry out the water spray maintenance to the mechanism sand concrete surface after the compaction plastering earlier, and cover and keep mechanism sand concrete surface moist state to concrete final set, obtain prefab initial product, break away from prefab initial product and mould, maintain the prefab initial product of drawing of patterns, specifically include: delivering into curing room, maintaining at 20 + -2 deg.C for 3-4h, providing steam, heating at 22-24 deg.C/h for 1.5-2h, maintaining at 60 + -3 deg.C for 8-10h, and naturally cooling for 1.5-2 h.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. An assembly type concrete brick based on a machine-made sand material is characterized by comprising a brick body, wherein tenon-and-mortise structures for splicing are respectively arranged at two ends of the brick body, a plurality of inserting blocks are arranged at intervals in the middle of the lower surface of the brick body, inserting slots for inserting the inserting blocks are arranged on the upper surface of the brick body in a matching manner, a plurality of vertical through holes are formed in one side of the inserting block of the brick body at intervals in a penetrating manner, and an additional material inserting cavity is formed in the other side of the inserting block of the brick body;
the upper surface of the brick body is provided with a flash tank around the slot, and the top of the slot is also provided with a guide groove communicated with the flash tank;
a plurality of transverse through holes are formed in the two end faces of the brick body at intervals from top to bottom on one side close to the vertical through holes, and the transverse through holes are communicated with the vertical through holes.
2. The fabricated concrete brick based on the machine-made sand material is characterized in that the tenon-and-mortise structure comprises a male tenon strip and a female tenon groove which are respectively arranged at two ends of a brick body, the male tenon strip comprises a plurality of sliding strips which are arranged on one end of the brick body and penetrate through the upper surface and the lower surface, and the female tenon groove comprises a plurality of sliding grooves which are arranged on the other end of the brick body and penetrate through the upper surface and the lower surface and are matched with the sliding strips.
3. The fabricated concrete block based on machine-made sand material according to claim 1, wherein one or more of heat insulating material, flame retardant material or sound insulating material is inserted into the additional material insertion cavity.
4. The fabricated concrete block based on machine-made sand material of claim 1, wherein the number of the slots is three, the flash groove is disposed around the periphery of the three slots, and the depth of the flash groove is not less than three-quarters of the depth of the slots.
5. The fabricated concrete block based on machine-made sand material of claim 1, wherein the cross sections of the slot and the insert block are straight groove type.
6. The fabricated concrete block based on machine-made sand material as claimed in claim 5, wherein the section of the insert block is smaller than that of the slot, a plurality of aligning ribs are symmetrically arranged on the side surface of the insert block, and the distance between each pair of aligning ribs is in clearance fit with the specification of the slot section.
7. The fabricated concrete block based on machine-made sand material of claim 1, wherein the concrete block is prepared according to the following method comprising:
a. preparing the following raw materials in parts by weight:
350 parts of cement-250-one-material, 30-80 parts of fly ash, 30-80 parts of gneiss sheet machine-made sandstone powder, 840 parts of machine-made sand-one-material, 1000 parts of machine-made coarse aggregate-800-one-material, 270 parts of water-230-one-material, 1-2 parts of early strength agent, 6-8 parts of modifier, 3-7 parts of bentonite, 25-50 parts of steel fiber, 2-6 parts of polypropylene fiber, 30-60 parts of metakaolin, 5-10 parts of water reducer and 0.2-0.5 part of cellulose ether;
b. hydrogen peroxide, acetic acid and water are prepared into pretreatment liquid according to the weight ratio of 10:2:120, machine-made sandstone is put into the pretreatment liquid for immersion treatment for 15-25 minutes and then filtered, then a coupling agent solution with the aggregate mass of about 2-3% is sprayed into the pretreated sandstone, and the pretreated sandstone is dried for 2 hours at the temperature of 160 ℃ of an oven after being uniformly stirred to obtain modified machine-made sand, wherein the weight percentage of a silane coupling agent in the coupling agent solution is 4-6%, and the pH value of the coupling agent solution is adjusted to 4.5-5.5 by acid;
c. stirring cement, fly ash and gneiss machine-made sandstone powder in a forced stirrer for 2-5min to obtain a mixture A, adding the modified machine-made sandstone, polypropylene fiber, steel fiber, bentonite and metakaolin into the mixture A, stirring for 5-10min to obtain a mixture B, adding a modifier into water, heating in a water bath until all components are melted to form a homogeneous solution, stirring and cooling to 18-22 ℃, sequentially adding the mixture B, a water reducing agent, an early strength agent and the rest water, and stirring for 4-7min to obtain machine-made sand concrete for later use;
d. structural design mould according to the concrete brick, clearance mould surface, assemble the mould, and pour the mould into with the mechanism sand concrete that the stirring is good after applying paint the release agent with a brush, the vibration makes it closely knit, receive the face processing to the mechanism sand concrete surface after closely knit, use plastic film to cover the mechanism sand concrete after receiving the face, avoid mechanism sand concrete surface to lose water too fast, when closing on the initial set, carry out compaction plastering on the concrete surface, carry out the water spray maintenance to the mechanism sand concrete surface after the compaction plastering earlier, and cover and keep mechanism sand concrete surface moist state to concrete final set, obtain prefab initial product, break away from prefab initial product and mould, maintain the prefab initial product of drawing of patterns, specifically include: delivering into curing room, maintaining at 20 + -2 deg.C for 3-4h, providing steam, heating at 22-24 deg.C/h for 1.5-2h, maintaining at 60 + -3 deg.C for 8-10h, and naturally cooling for 1.5-2 h.
8. The fabricated concrete brick based on the machine-made sand material as claimed in claim 7, wherein the mass ratio of the fly ash to the gneiss machine-made sand powder is 1: 1;
the content of the bentonite is not more than 0.8 percent of the weight of the concrete cementing material, and the content of the metakaolin is not more than 10 percent of the weight of the concrete cementing material.
9. The fabricated concrete brick based on the machine-made sand material is characterized in that the machine-made sand is a mixture of limestone machine-made sand, granite machine-made sand and diabase machine-made sand according to a weight ratio of 5:3:1, the fineness modulus of the machine-made sand is 2.8-3.2, the particle size is 0.15-5.0mm, the machine-made coarse aggregate is waste rock chips with the crushed limestone ore and the particle size is 5-10mm, and the water reducing agent is a polycarboxylic acid water reducing agent.
10. The fabricated concrete block based on machine-made sand material of claim 7, wherein the early strength agent comprises calcium formate, and the modifier is a mixture of polyvinyl alcohol, dispersible latex powder, vinyl acetate-ethylene copolymer and hydroxypropyl methyl cellulose in a ratio of 1:4:2: 2.
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| CN113684946A (en) * | 2021-08-30 | 2021-11-23 | 中儒科信达建设集团有限公司 | Energy-saving and environment-friendly assembled wall with fireproof function and assembling method thereof |
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