CN110436961A - Cell concrete, insulated compound trabs based on gangue and preparation method thereof - Google Patents
Cell concrete, insulated compound trabs based on gangue and preparation method thereof Download PDFInfo
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- CN110436961A CN110436961A CN201910467960.1A CN201910467960A CN110436961A CN 110436961 A CN110436961 A CN 110436961A CN 201910467960 A CN201910467960 A CN 201910467960A CN 110436961 A CN110436961 A CN 110436961A
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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
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
Cell concrete based on gangue of the invention, insulated compound trabs and preparation method thereof are related to the realm of building construction, and the cell concrete based on gangue includes 100 parts of cement, 20-50 parts of gangue, 0-50 parts of sand, 50-80 parts of haydite, 1-3 parts of water-reducing agent, 0.1-1 parts of polypropylene fibre, 0.3-0.8 parts of foaming agent, 0.05-0.5 parts of thickener, 30-50 parts of water.Gangue is the mixture of gangue powder, gangue spontaneous combustion lime-ash, gangue powder and gangue spontaneous combustion lime-ash.Gangue is claystone class or sandstones spoil, chemical constituent SiO2: 40%~70%, Al2O3: 10%~30%, Fe2O3:≤6%, CaO :≤10%, MgO :≤2%.Gangue is farthest utilized in the present invention, and utilization of coal gangue is utilized, and realizes the double benefit to reduce environmental pollution with building products section material.
Description
Technical field
The present invention relates to the realm of building construction, cell concrete, insulated compound trabs specially based on gangue and its
Preparation method.
Background technique
Precast concrete wall panel is widely used in the construction applications of the non-bearing wall body in house.In recent years, as China is built
Industrialized fast development is built, it is also more and more using the engineer application of precast concrete wall panel.Novel precast concrete wall panel
Technology is quickly grown.
Gangue is the solid waste discharged during coal mining process and coal washing, be one kind in coalification course with coal seam companion
A kind of lower, harder than the coal black and gray rock of raw phosphorus content.Currently, the gangue utilization rate in China is lower, a large amount of coal
Spoil air storage not only occupies tract, and the sulfide in gangue escapes or leaching can pollute atmosphere, or even also
It can spontaneous combustion generation fire.
Currently, gangue has been used for precast concrete wall panel.However gangue in concrete as just coarse aggregate and
Fine aggregate uses, and the usage of gangue is single, and dosage is limited.In addition, the gangue used need to be by being activated or using
Coal gangue clinker after spontaneous combustion.Therefore, the use of the gangue not only limited, and the gangue with non-spontaneous combustion is needed when use
Separation, the technique for increasing production.In addition, gangue precast concrete wall panel, the poor thermal insulation property of wall, are only capable of as common
Internal partition wall uses.
Summary of the invention
The purpose of the present invention is to provide a kind of cell concrete based on gangue, insulated compound trabs and its preparation sides
Method, to solve when gangue makes precast concrete wall panel as aggregate there are the usage of gangue is single, dosage is limited, bastard coal
Stone, which needs to be activated, increases production technology, while the problem of wall insulation function difference.
In order to solve the above technical problem, the present invention provides a kind of cell concretes based on gangue, comprising:
Wherein, the gangue is gangue powder, gangue spontaneous combustion lime-ash, gangue powder and gangue spontaneous combustion lime-ash
Mixture；The gangue is claystone class or sandstones spoil, chemical constituent SiO2: 40%~70%, Al2O3:
10%~30%, Fe2O3:≤6%, CaO :≤10%, MgO :≤2%.
Preferably, the partial size of the gangue powder is less than 5mm.
In addition, the present invention also provides a kind of insulated compound trabs based on gangue, including common coal gangue concrete
Layer, further includes:
Gangue cell concrete layer is poured by the above-mentioned cell concrete based on gangue and is formed, and is arranged in common coal
The top of gangue concrete layer；
Framework of steel reinforcement is arranged in common coal gangue concrete layer；
It is connected between common coal gangue concrete layer and gangue cell concrete layer by tension rib.
Preferably, the dry density of the gangue cell concrete layer is 650kg/m3~1000kg/m3, gangue micropore
The intensity of concrete layer is 4MPa~8MPa, and the intensity of the common coal gangue concrete layer is 30MPa~40MPa.
Preferably, the common coal gangue concrete layer with a thickness of 10mm~150mm, the gangue cell concrete
Layer with a thickness of 50mm~200mm, and the thickness of the gangue cell concrete layer is not less than common coal gangue concrete
The thickness of layer.
In addition, the present invention also provides the construction methods of the insulated compound trabs based on gangue, comprising the following steps:
Step 1: it is 30mm or less that gangue, which is crushed to partial size,；
Step 2: sieving to coal gangue particle, it is general for making to obtain the coal gangue particle that partial size is 5mm~30mm
The aggregate of logical coal gangue concrete layer, partial size are 5mm coal gangue particle below for making gangue cell concrete layer
Filler；
Step 3: preparing mold and arrangement of reinforcement；
It is mixed Step 4: the coal gangue particle that partial size obtained in optional step two is 5mm~30mm prepares common gangue
Solidifying soil, and common coal gangue concrete is poured into mold, vibration is smash flat；
Step 5: production foam is spare；
Step 6: the foam that partial size obtained in optional step two is 5mm coal gangue particle below, step 5 obtains,
Gangue cell concrete is prepared according to said ratio；
Step 7: the gangue cell concrete prepared is poured into mold before the condensation of common coal gangue concrete layer,
It smoothes out；
Step 8: the combined wall board based on gangue poured is carried out room temperature natural curing or steam curing, reach
Demoulding strength demoulds simultaneously sprinkling maintenance, and concrete surface sprays sealer after maintenance.
Preferably, in the step 6 gangue cell concrete preparation method the following steps are included:
Step 1: mixing gangue cement starch: blender is added in raw material in the following order: cement, gangue,
Sand, polypropylene fibre, water, water-reducing agent, thickener；
Step 2: mixing gangue foam mortar: foaming agent is added in gangue cement slurry；
Step 3: mixing gangue cell concrete: in the resulting gangue foam mortar of step 2 be added haydite after
It is continuous to be stirred until homogeneous.
Preferably, the volume ratio of the foaming agent and the resulting gangue cement slurry of step 1 is 1.5~2.5:1.
Preferably, mixing time is 5s~15s in the step 3.
Compared with prior art, it the features of the present invention and has the beneficial effect that
(1) insulated compound trabs of the invention based on gangue include common coal gangue concrete layer and gangue micropore
Concrete layer, two layer concretes rely primarily on cement aquation connection.Common coal gangue concrete layer and gangue micropore are mixed
Solidifying soil layer is continuous placing, and manufacture craft is simple.Two layer concretes are all made of gangue, and gangue is farthest utilized,
Utilization of coal gangue is utilized, the double benefit to reduce environmental pollution with building products section material is realized.
(2) micropore coal gangue concrete of the invention uses 5mm coal gangue particle below, can both reduce micropore coagulation
The volume contraction of soil, is also easy to be uniformly dispersed.It is small compared with sand using the increase of gangue weight simultaneously, and there are also certain interior maintenances
Effect.
(3) pretreatment of gangue of the invention is simple, and gangue is it is only necessary to carry out break process, without separating spontaneous combustion
Gangue and non-self-igniting coal gangue save process, save energy without carrying out the processes such as surface preparation or activation heat treatment
Source.And common coal gangue concrete layer can form special decorative effect using the black of gangue.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the combined wall board based on gangue.
Attached drawing mark: the common coal gangue concrete layer of 1-, 2- gangue cell concrete layer, 3- framework of steel reinforcement, 4- drawknot
Muscle.
Specific embodiment
For realize the present invention technological means, character of innovation, reach purpose and effect is easy to understand, below to
Invention further illustrates.
The embodiment recorded herein is specific specific embodiment of the invention, for illustrating design of the invention,
Be it is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein
Outside embodiment, those skilled in the art can also based on the claim of this application book and specification disclosure of that using aobvious and
The other technical solutions being clear to, these technical solutions include using any obvious to making for the embodiment recorded herein
The technical solution of substitutions and modifications.
It is as shown in Figure 1 a kind of combined wall board based on gangue, including common coal gangue concrete layer 1, further includes coal
Spoil cell concrete layer 2 and framework of steel reinforcement 3, gangue cell concrete layer 2 is poured by gangue cell concrete to be formed, if
It sets at the top of common coal gangue concrete layer 1.Framework of steel reinforcement 3 is arranged in common coal gangue concrete layer 1.Preferably, general
It is connected between logical coal gangue concrete layer 1 and gangue cell concrete layer 2 by tension rib 4.The spacing of tension rib 4 is
500mm.The dry density of gangue cell concrete layer 2 is 650kg/m3~1000kg/m3, gangue cell concrete layer 2 it is strong
Degree is 4MPa~8MPa, and the intensity of common coal gangue concrete layer 1 is 30MPa~40MPa.
Common coal gangue concrete layer 1 with a thickness of 10mm~150mm, gangue cell concrete layer 2 with a thickness of
50mm~200mm, and the thickness of gangue cell concrete layer 2 is not less than the thickness of common coal gangue concrete layer 1.
The proportion of the raw material of gangue cell concrete are as follows:
Wherein, gangue can be gangue powder, gangue spontaneous combustion lime-ash, gangue powder and gangue spontaneous combustion lime-ash
Mixture；
Gangue is claystone class or sandstones spoil, chemical constituent SiO2: 40%~70%, Al2O3: 10%~
30%, Fe2O3:≤6%, CaO :≤10%, MgO :≤2%；The content range of gangue spontaneous combustion lime-ash is 0- in gangue powder
100%；The partial size of gangue powder is less than 5mm.
The production method of combined wall board based on gangue the following steps are included:
Step 1: it is 30mm or less that gangue, which is crushed to partial size,.
Step 2: sieving to coal gangue particle, it is general for making to obtain the coal gangue particle that partial size is 5mm~30mm
The aggregate of logical coal gangue concrete layer 1, partial size are 5mm coal gangue particle below for making gangue cell concrete layer 2
Filler.
Step 3: preparing mold and arrangement of reinforcement.
It is mixed Step 4: the coal gangue particle that partial size obtained in optional step two is 5mm~30mm prepares common gangue
Solidifying soil, and common coal gangue concrete is poured into mold, vibration is smash flat.Wherein the composition of raw materials of common coal gangue concrete with it is general
Logical concrete is close, it is only necessary to substitute 50%~100% aggregate with gangue.
Step 5: spare using physical blowing production foam.
Step 6: the foam that partial size obtained in optional step two is 5mm coal gangue particle below, step 5 obtains,
Raw material is weighed according to above-mentioned gangue cell concrete proportion.
Step 7: mixing gangue cement is starched: blender is added in raw material in the following order: cement, coal gangue powder
Grain, polypropylene fibre, water, water-reducing agent, thickener.
Step 8: mixing gangue foam mortar: foam being added in gangue cement slurry, foam and gangue cement are starched
Volume ratio be 1.5~2.5:1.
Step 9: mixing gangue cell concrete.Haydite is added in gangue foam mortar, stirs 5s~15s.
Step 10: the gangue cell concrete prepared is poured into mould before the condensation of common coal gangue concrete layer 1
Tool smoothes out；
Step 11: the combined wall board based on gangue poured is carried out room temperature natural curing or steam curing, reach
To demoulding strength, simultaneously sprinkling maintenance is demoulded, concrete surface sprays sealer after maintenance.
Preferably, can be after demoulding maintenance, before spraying sealer, gangue cell concrete layer surface of polishing is exposed
The gangue aggregate section of black is smeared concrete enclosing agent and is polished, to form special decorative effect.
Embodiment
It is 30mm hereinafter, sieving to coal gangue particle that gangue, which is crushed to partial size, and obtaining partial size is 5mm~30mm
Coal gangue particle be used to make the aggregate of common coal gangue concrete layer 1, it is common to weigh preparation according to the raw material proportioning in table 1
The raw material of coal gangue concrete calculates according to parts by weight.
Common coal gangue concrete is prepared in accordance with the following methods:
Step 1: blender is added in raw material in the following order: stone coarse aggregate, gangue coarse aggregate, Machine-made Sand,
Cement, flyash, water, water-reducing agent.
Step 2: stir about 5min.
The raw material and proportion of the common coal gangue concrete of table 1.
Wherein the chemical composition of gangue is SiO2: 40%~70%, Al2O3: 10%~30%, Fe2O3:≤6%, CaO:
≤ 10%, MgO :≤2%.
Prepare mold and arrangement of reinforcement, the common coal gangue concrete of preparation is poured into mold, vibration is smash flat.Concreting is thick
Degree is 10mm~150mm.
The filler that obtained gangue of the partial size less than 5mm is used as gangue cell concrete is sieved, according to matching in table 2
Than the raw material for weighing gangue cell concrete, calculate according to parts by weight.
Gangue cell concrete is prepared in accordance with the following methods:
Step 1: mixing gangue cement is starched.Blender is added in raw material in the following order: cement, gangue,
Sand, polypropylene fibre fiber, water, water-reducing agent, thickener.
Step 2: mixing gangue foam mortar.Foam is added in gangue cement slurry, foam and gangue cement are starched
Volume ratio be 1.5~2.5:1.
Step 3: mixing gangue cell concrete.Haydite is added in gangue foam mortar, stirs 5s~15s.
The raw material and proportion of 2. gangue cell concrete of table
Wherein the chemical composition of gangue is SiO2: 40%~70%, Al2O3: 10%~30%, Fe2O3:≤6%, CaO:
≤ 10%, MgO :≤2%.Thickener is cellulose ether.
The gangue cell concrete of above-mentioned preparation is subjected to dry density according to JG/T266-2011 " foam concrete ", is resisted
Compressive Strength, Determination of conductive coefficients, specific performance test result are as shown in table 3.
The performance test results of gangue cell concrete in each embodiment of table 3.
| Dry density (kg/m3) | Compression strength (MPa) | Thermal coefficient (W/mk) | |
| 2-1 | 710 | 6.3 | 0.19 |
| 2-2 | 840 | 7.1 | 0.23 |
| 2-3 | 830 | 7.2 | 0.23 |
| 2-4 | 1000 | 8.0 | 0.27 |
| 2-5 | 650 | 4.2 | 0.18 |
| 2-6 | 650 | 4.7 | 0.18 |
Before common 1 initial set of coal gangue concrete layer, the gangue cell concrete prepared is poured into mold, pours thickness
Degree is 50mm~200mm, is smoothed out with darby.
In order to reinforce the connection between common coal gangue concrete layer 1 and gangue cell concrete layer 2, in common bastard coal
Tension rib 4 is set between stone concrete layer 1 and gangue cell concrete layer 2.
Room temperature natural curing is carried out to the concrete composite wallboard poured or steam curing reaches demoulding strength.Then it takes off
Mould maintenance.In order to make concrete panel have better decorative effect, polishes on 2 surface of gangue cell concrete layer and expose black
Gangue aggregate section, smear concrete enclosing agent simultaneously polish.
By above-mentioned preparation based on the combined wall board of gangue according to GB/T 33600-2017 " the porous coagulation of metal tailings
Native sandwich system combined wall board " and JGJ110-2008 " architectural engineering cohesive strength of decorative tile test stone " carried out hanging force,
Heat transfer coefficient, adhesion strength test, specific performance test result are as shown in table 4.
The performance test results of combined wall board in each embodiment of table 4.
Comparative experiments 1
It regard embodiment 1 as experimental group, then control group 1 and control group 2 is set, wherein cell concrete in control group 1
Raw material proportioning specifically: 500 parts of the self-igniting coal gangue of 100 parts of cement, 10 parts of flyash, partial size less than 15mm, partial size are less than 5mm
300 parts of self-igniting coal gangue, 65 parts of haydite, 100 parts of water, water-reducing agent, foaming agent, polypropylene fibre are same as Example 1.Control
The raw material proportioning of cell concrete in group 2 specifically: 100 parts of cement, 100 parts of mineral powder, 50 parts of flyash, 130 parts of haydite, water
100 parts, 2 parts of water-reducing agent, foaming agent, polypropylene fibre are same as Example 1.
Cell concrete made from above-mentioned control group 1 and control group 2 is fabricated to 100mm × 100mm × 100mm examination
Block, has carried out performance test, and specific test result is as shown in table 5.
The performance test results of each concrete in 5. comparative test 1 of table
As shown in Table 5, for gangue cell concrete compared with the cell concrete of control group 1, gangue is micro- in embodiment 1
Hole concrete mortar stability is good, even particle distribution；Compared with the cell concrete of control group 2, density is smaller, thermal coefficient
Smaller, compression strength is slightly lower.Generally, the two performance is not distinguished significantly.
Comparative experiments 2
It is experimental group by embodiment 1, then control group 3 and control group 4 is set.Wherein concrete layer is uniformly adopted in control group 3
With common coal gangue concrete.Bottom is common coal gangue concrete layer in control group 4, and upper layer is common cell concrete layer.
The raw material proportioning and preparation method of common coal gangue concrete layer are identical as coal gangue concrete layer common in embodiment 1, commonly
The gangue in common coal gangue concrete is changed into stone in cell concrete layer, remaining component and dosage and common gangue
Concrete is identical.
Equally, control group 3 and control group 4 are subjected to heat transfer property test, test result is as shown in table 6.
The performance test results of 6. comparative experiments of table, 3 deadlight
As shown in Table 6, the thermal insulation property of combined wall board and the heat preservation based on gangue general microporous concrete in embodiment 1
The thermal insulation property of combined wall board is close, and is substantially better than common coal gangue concrete wall.
Above embodiment be only preferred embodiments of the present invention will be described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art do technical solution of the present invention
Various changes and improvements out should all be fallen into the protection scope that claims of the present invention determines.
Claims (9)
1. a kind of cell concrete based on gangue, characterized by comprising:
The gangue is the mixture of gangue powder, gangue spontaneous combustion lime-ash, gangue powder and gangue spontaneous combustion lime-ash；
The gangue is claystone class or sandstones spoil, chemical constituent SiO2: 40%~70%, Al2O3: 10%~
30%, Fe2O3:≤6%, CaO :≤10%, MgO :≤2%.
2. a kind of cell concrete based on gangue according to claim 1, it is characterised in that: the gangue powder
Partial size be less than 5mm.
3. a kind of insulated compound trabs based on gangue, including common coal gangue concrete layer (1), it is characterised in that also wrap
It includes:
Gangue cell concrete layer (2), based on the cell concrete of gangue as described in claim 1~2 any one
It pours to be formed, be arranged at the top of common coal gangue concrete layer (1)；
Framework of steel reinforcement (3) is arranged in common coal gangue concrete layer (1)；
It is connect between common coal gangue concrete layer (1) and gangue cell concrete layer (2) by tension rib (4).
4. a kind of insulated compound trabs based on gangue according to claim 3, it is characterised in that: the gangue is micro-
The dry density of hole concrete layer (2) is 650kg/m3~1000kg/m3, the intensity of gangue cell concrete layer (2) be 4MPa~
8MPa, the intensity of the common coal gangue concrete layer (1) are 30MPa~40MPa.
5. a kind of insulated compound trabs based on gangue according to claim 3, it is characterised in that: the common bastard coal
Stone concrete layer (1) with a thickness of 10mm~150mm, the gangue cell concrete layer (2) with a thickness of 50mm~
200mm, and the thickness of the gangue cell concrete layer (2) is not less than the thickness of common coal gangue concrete layer (1).
6. the construction method of the insulated compound trabs according to claim 3~5 any one based on gangue, feature
Be the following steps are included:
Step 1: it is 30mm or less that gangue, which is crushed to partial size,；
Step 2: being sieved to coal gangue particle, obtains the coal gangue particle that partial size is 5mm~30mm and be used to make common coal
The aggregate of gangue concrete layer (1), partial size are 5mm coal gangue particle below for making gangue cell concrete layer (2)
Filler；
Step 3: preparing mold and arrangement of reinforcement；
Step 4: the coal gangue particle that partial size obtained in optional step two is 5mm~30mm prepares common coal gangue concrete,
And common coal gangue concrete is poured into mold, vibration is smash flat；
Step 5: production foam is spare；
Step 6: the foam that partial size obtained in optional step two is 5mm coal gangue particle below, step 5 obtains, according to
Said ratio prepares gangue cell concrete；
Step 7: the gangue cell concrete prepared is poured into mold before the condensation of common coal gangue concrete layer (1),
It smoothes out；
Step 8: the combined wall board based on gangue poured is carried out room temperature natural curing or steam curing, reach demoulding
Intensity demoulds simultaneously sprinkling maintenance, and concrete surface sprays sealer after maintenance.
7. the construction method of the insulated compound trabs according to claim 6 based on gangue, which is characterized in that the step
In rapid six gangue cell concrete preparation method the following steps are included:
Step 1: mixing gangue cement is starched: blender is added in raw material in the following order: cement, sand, gathers gangue
Tacryl, water, water-reducing agent, thickener；
Step 2: mixing gangue foam mortar: foam, the body of foam and gangue cement slurry being added in gangue cement slurry
Product is than being 1.5~2.5:1；
Step 3: mixing gangue cell concrete: haydite is added in the resulting gangue foam mortar of step 2 and continues to stir
It mixes to uniform.
8. the construction method of the insulated compound trabs according to claim 7 based on gangue, it is characterised in that: the hair
The volume ratio of infusion and the resulting gangue cement slurry of step 1 is 1.5~2.5:1.
9. the construction method of the insulated compound trabs according to claim 7 based on gangue, it is characterised in that: the step
Mixing time is 5s~15s in rapid three.
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| CN111689735A (en) * | 2020-06-15 | 2020-09-22 | 浙江中硕环保科技有限公司 | Coal gangue imitation stone and preparation method thereof |
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