CN110438970B - Assembled gangue porous concrete sand fixation plate and preparation method thereof - Google Patents
Assembled gangue porous concrete sand fixation plate and preparation method thereof Download PDFInfo
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- CN110438970B CN110438970B CN201910735107.3A CN201910735107A CN110438970B CN 110438970 B CN110438970 B CN 110438970B CN 201910735107 A CN201910735107 A CN 201910735107A CN 110438970 B CN110438970 B CN 110438970B
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- 239000004576 sand Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000003245 coal Substances 0.000 claims abstract description 66
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000009423 ventilation Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000011398 Portland cement Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000008719 thickening Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 abstract description 9
- 244000025254 Cannabis sativa Species 0.000 abstract description 8
- 239000002910 solid waste Substances 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 239000010902 straw Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Agronomy & Crop Science (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an assembled coal gangue porous concrete sand fixation plate and a preparation method thereof, wherein the sand fixation plate comprises a plurality of unit plates, and the unit plates are intersected into a grid shape by a horizontal slat and a longitudinal slat in a same position; the transverse strip plate body is provided with first grooves at intervals, first embedded reinforcing bars are arranged along the long side direction of the transverse strip plate and below the first grooves, first vent holes are reserved along the short side direction of the transverse strip plate, and each first vent hole comprises first upper vent holes arranged on two sides of a notch of each first groove and first lower vent holes arranged on the lower parts of two ends of each first embedded reinforcing bar; the longitudinal plate body is provided with second grooves at intervals. The invention can fix sand and consume solid waste coal gangue, and simultaneously develop the utilization mode of the coal gangue and the sand fixation mode of the desert. Compared with other conventional physical sand fixing methods such as grass square grids and Dan Fangge, the coal gangue porous concrete sand fixing plate has longer service life than the grass square grids and lower cost than the stone square grids.
Description
Technical Field
The invention relates to the technical field of desertification control technology and recycling of solid wastes, in particular to an assembled coal gangue porous concrete sand fixation plate and a preparation method thereof.
Background
China is one of countries with serious desertification in the world, and the desert area accounts for 13.6% of the total area of the territories. The key point of desertification control is wind prevention and sand fixation.
The mode of sand fixation can be divided into physical sand fixation, chemical sand fixation and biological sand fixation, wherein the physical sand fixation mainly comprises stone square grids, soil square grids and the like; the chemical sand fixation mainly adopts high molecular polymer; the biological sand fixation is carried out on plants.
The grass square sand barrier has low cost and simple construction, and is the most commonly used sand fixing method. Although wheat straw and rice straw used for grass square are not easy to rot in desert areas, the service life of the wheat straw and rice straw is still short, and is generally 3-5 years.
Dan Fangge sand barriers have better sand fixing effect and longer service life than grass square sand barriers. However, a large number of stones are required for building the stone grid, the stones are not easily obtained in the desert area, and the natural stone resources are becoming more and more scarce at present due to the rapid development of urban land in China.
Disclosure of Invention
The invention aims to provide an assembled coal gangue porous concrete sand fixation plate and a preparation method thereof, which aim to solve the technical problems of cyclic use of waste coal gangue, short service life of sand barriers, unsatisfactory sand fixation effect and limited quantity of natural stones.
In order to achieve the above purpose, the invention adopts the following technical scheme: the assembled coal gangue porous concrete sand fixing plate comprises a plurality of unit plates, wherein the unit plates are formed by intersecting transverse strips and longitudinal strips in a same position to form a grid shape; the transverse strip plate body is provided with first grooves at intervals, first embedded reinforcing bars are arranged along the long side direction of the transverse strip plate and below the first grooves, first vent holes are reserved along the short side direction of the transverse strip plate, and each first vent hole comprises first upper vent holes arranged on two sides of a notch of each first groove and first lower vent holes arranged on the lower parts of two ends of each first embedded reinforcing bar;
second grooves are formed in the longitudinal plate bodies at intervals, and second embedded reinforcing bars are arranged along the long side direction of the longitudinal plate and below the second grooves; a second ventilation hole is reserved along the short side direction of the longitudinal strip plate, and comprises second upper ventilation holes arranged on two sides of a notch of the second groove and second lower ventilation holes arranged on the lower parts of two ends of the second embedded reinforcement;
the first groove and the second groove are mutually matched; after the transverse strip plates are meshed with the longitudinal strip plates, the upper surface and the lower surface of the unit plates are flush.
Further, the first grooves are at least two and have a depth equal to half the height of the transverse slat; the second grooves are at least two and have a depth equal to half the height of the longitudinal strips.
Further, the included angle between the horizontal slat and the vertical slat is 90 °.
Further, the density of the concrete at the first groove is greater than that of the cross bar plate body; the density of concrete at the second groove is greater than that of the longitudinal plate body.
Further, the first groove depth is equal to the second groove depth; the first groove depth was 50mm.
Further, the sand fixing plate is made of coal gangue porous concrete; the gangue porous concrete comprises the following raw materials in parts by weight: 120-140 parts of ordinary Portland cement, 1 part of water reducer, 1 part of thickening water retention agent, 450-600 parts of gangue aggregate and 30-40 parts of water.
Further, the particle size of the gangue aggregate is 20-50mm.
Further, the gangue aggregate is clay rock or sandstone gangue; the chemical components are SiO 2 ：40%~70%，Al 2 O 3 ：10%-30%，Fe 2 O 3 ：≤6%，CaO：≤10%，MgO：≤2%。
Further, the compressive strength of the gangue porous concrete is 5-20MPa.
Further, the lengths of the transverse slat and the longitudinal slat are equal; the length of the transverse slat is at least 500mm; the height of the transverse slat is equal to that of the longitudinal slat; the height of the transverse strip is at least 100mm.
Further, the thicknesses of the transverse slat and the longitudinal slat are equal; the thickness of the transverse strip plate is 5-10cm.
Further, the apertures of the first ventilation holes and the second ventilation holes are equal; the first vent aperture is: 10-30mm
The invention also provides a preparation method of the assembled gangue porous concrete sand fixation plate, which comprises the following specific steps:
crushing coal gangue by using a crusher;
screening the crushed gangue particles in the first step, wherein the gangue particles with the particle size of 20-50mm are used as aggregate of porous concrete;
step three, preparing a mould of the coal gangue porous concrete sand fixation plate;
step four, preparing coal gangue porous concrete, adding ordinary Portland cement into a mixer, then adding coal gangue aggregate, a water reducing agent and a thickening water retaining agent, and after preliminary mixing, adding water and uniformly mixing;
step five, manufacturing a transverse slat;
layering the coal gangue porous concrete in the fourth step into a mould, putting first pre-buried reinforcing bars into a lower area of the first groove when the coal gangue porous concrete is paved to half height, and inserting plain round reinforcing bars to manufacture a first lower vent hole and a first upper vent hole, and continuously paving the coal gangue porous concrete;
vibrating and compacting the coal gangue porous concrete from the upper part by adopting a vibrator; wherein the loose paving coefficient at the first groove is 1.2-1.3; the loose paving coefficient between the two ends of the transverse strip plate and the two first grooves is 1.1-1.2;
step six, referring to the step five to manufacture a longitudinal slat; after the transverse strip plates are meshed with the longitudinal strip plates, the upper surfaces and the lower surfaces of the unit plates are flush;
and seventhly, removing the mould, and carrying out sprinkling maintenance on the coal gangue porous concrete sand fixation plate for 7 days.
The beneficial effects of the invention are as follows:
the assembled coal gangue porous concrete sand fixing plate and the preparation method thereof provided by the invention can fix sand and can also absorb solid waste coal gangue, and simultaneously develop a utilization mode of the coal gangue and a sand fixing mode of a desert, thereby being a good method for changing waste into valuables.
2, the mode adopted by the invention is physical sand fixation, and compared with other conventional physical sand fixation methods such as grass square grids and Dan Fangge, the service life of the gangue porous concrete sand fixation plate is longer than that of the grass square grids, and the cost is lower than that of stone square grids.
And 3, the combination between the transverse slat and the longitudinal slat is flexible, and the floor can adapt to different floor requirements. After being spliced, the novel sand-fixation composite material can be well adhered to the ground, and a good sand-fixation effect is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The primary object and other advantages of the invention may be realized and attained by means of the instrumentalities and particularly pointed out in the specification.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a cross bar plate structure.
Fig. 2 is a schematic view of the location of the first vent.
Fig. 3 is a schematic structural view of the cell plate.
Fig. 4 is a usage state diagram.
Fig. 5 is a schematic diagram of example 4.
Reference numerals: 1-horizontal slat, 2-first recess, 3-first pre-buried arrangement of reinforcement, 4-vertical slat, 5-first upper vent, 6-first lower vent, 7-second upper vent, 8-second lower vent, 9-second recess.
Detailed Description
The following examples are given by way of illustration only and are not to be construed as limiting the scope of the invention.
Example 1
As shown in fig. 1, the invention provides an assembled coal gangue porous concrete sand fixation plate, which is made of coal gangue porous concrete with partial compactness. The sand fixing plate comprises a plurality of unit plates, wherein the unit plates are intersected into a grid shape by the horizontal strip plates 1 and the vertical strip plates 4 in a same position; the plate body of the transverse plate 1 is provided with first grooves 2 at intervals, first embedded reinforcing bars 3 are arranged along the long side direction of the transverse plate 1 and below the first grooves 2, first vent holes are reserved along the short side direction of the transverse plate 1, and each first vent hole comprises first upper vent holes 5 arranged on two sides of a notch of the first groove 2 and first lower vent holes 6 arranged on the lower parts of two ends of the first embedded reinforcing bars 3.
The longitudinal strip plate 4 is provided with second grooves 9 at intervals, and second embedded reinforcing bars are arranged along the longitudinal edge direction of the longitudinal strip plate 4 and below the second grooves 9; a second ventilation hole is reserved along the short side direction of the longitudinal strip plate 4, and comprises second upper ventilation holes 7 arranged on two sides of the notch of the second groove 9 and second lower ventilation holes 8 arranged on the lower parts of two ends of the second embedded reinforcement; the first groove 2 and the second groove 9 are mutually matched; after the transverse strip plates 1 are meshed with the longitudinal strip plates 4, the upper and lower surfaces of the unit plates are flush. At least two first grooves 2 are formed, and the depth of the first grooves is equal to half of the height of the transverse slat 1; the second grooves 9 are at least two and have a depth equal to half the height of the longitudinal strips 4. The depth of the first groove 2 is equal to that of the second groove 9; the first recess 2 has a depth of 50mm.
As shown in fig. 3, the angle between the transverse strip 1 and the longitudinal strip 4 is 90 °. The lengths of the transverse lath 1 and the longitudinal lath 4 are equal; the length of the transverse slat 1 is at least 500mm; the height of the transverse slat 1 is equal to the height of the longitudinal slat 4; the height of the transverse strip 1 is at least 100mm. The thickness of the transverse slat 1 is equal to that of the longitudinal slat 4; the thickness of the transverse strip plate 1 is 5-10cm. The apertures of the first ventilation holes and the second ventilation holes are equal; the first vent aperture is: 10-30mm.
Wherein, the density of the concrete at the first groove 2 is greater than the density of the plate body of the horizontal strip plate 1; the concrete density at the second grooves 9 is greater than the slab body density of the longitudinal strips 4.
The sand fixing plate is made of coal gangue porous concrete; the gangue porous concrete comprises, for exampleThe following raw materials in parts by weight: 120-140 parts of ordinary Portland cement, 1 part of water reducer, 1 part of thickening water retention agent, 450-600 parts of gangue aggregate and 30-40 parts of water. The particle size of the gangue aggregate is 20-50mm. The gangue aggregate is clay rock or sandstone gangue; the chemical components are SiO 2 ：40%~70%，Al 2 O 3 ：10%-30%，Fe 2 O 3 : less than or equal to 6 percent, caO: less than or equal to 10 percent, mgO: less than or equal to 2 percent. The compressive strength of the gangue porous concrete is 5-20MPa, and the porosity is 8-15%.
The preparation method of the assembled gangue porous concrete sand fixation plate comprises the following specific steps:
crushing coal gangue by using a crusher;
screening the crushed gangue particles in the first step, wherein the gangue particles with the particle size of 20-50mm are used as aggregate of porous concrete;
step three, preparing a mould of the coal gangue porous concrete sand fixation plate;
step four, preparing coal gangue porous concrete, adding ordinary Portland cement into a mixer, then adding coal gangue aggregate, a water reducing agent and a thickening water retaining agent, and after preliminary mixing, adding water and uniformly mixing;
step five, manufacturing a transverse slat 1;
and (3) layering the coal gangue porous concrete in the step (IV) into a mould, putting a first pre-buried reinforcing bar 3 into a lower area of the first groove 2 when the coal gangue porous concrete is paved to half height, and inserting plain round reinforcing bars to manufacture a first lower vent hole 6 and a first upper vent hole 5, and continuously paving the coal gangue porous concrete.
Adopt the vibrator, carry out vibration compaction to gangue porous concrete from the top, porous concrete can divide into two general regions in region and closely knit region, closely knit region is located around the recess, and other then are general region, namely: the loose paving coefficient at the first groove 2 is 1.2-1.3; the loose spreading coefficient between the two ends of the transverse slat 1 and the two first grooves 2 is 1.1-1.2. The length of the dense area is 100mm, and the height of the dense area is the same as the height of the cross bar plate 1. The coal gangue aggregate is paved at least 5% -10% more in the compact area. The coal gangue porous concrete assembled sand fixing plate is provided with corner vent holes in a compact area, and has the advantages that: the accumulation of sand at the corners of the square is reduced.
Step six, referring to the step five, manufacturing a longitudinal slat 4; after the transverse strip plates 1 are meshed with the longitudinal strip plates 4, the upper and lower surfaces of the unit plates are flush;
and seventhly, removing the mould, and carrying out sprinkling maintenance on the coal gangue porous concrete sand fixation plate for 7 days.
Wherein, the pre-buried reinforcing bars can be bamboo bars and wood bars, and also can be prefabricated fiber cement laths.
Example 2
As shown in fig. 4, the coal mine resources in the western region of inner mongolia of China are rich, a large amount of coal gangue is piled up through years of mining, and desertification in the region is serious. The gangue adopted by the invention is solid waste discharged in the coal mining process and the coal washing process, and is a dark gray rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process. At present, the utilization rate of the gangue in China is low, a large amount of gangue is piled up in the open air, so that a large amount of land is occupied, and the gangue can be piled up together, so that heat cannot be dissipated, and the gangue is natural. In order to fully utilize waste coal gangue in coal mining, the invention provides an assembled coal gangue porous concrete sand fixing plate, which comprises a plurality of unit plates, wherein the unit plates are intersected into a grid shape by a horizontal strip plate 1 and a vertical strip plate 4 in an identical position; the plate bodies of the transverse plate 1 are provided with first grooves 2 at intervals, the plate bodies of the longitudinal plate 4 are provided with second grooves 9 at intervals, and the first grooves 2 are mutually matched with the second grooves 9; after the transverse strip plates 1 are meshed with the longitudinal strip plates 4, the upper and lower surfaces of the unit plates are flush. In desert areas, according to figure 4, two adjacent zigzag shapes are connected at a certain distance by adopting sand fixation plates with four first grooves 2. Finally, paving the desert upper part to form a groined grid.
As shown in fig. 1 and 2, the first grooves 2 are at least two and have a depth equal to half the height of the transverse strip plate 1, the width of the first grooves 2 is 25mm, and the depth is 50mm; the second grooves 9 are at least two and have a depth equal to half the height of the longitudinal strips 4. The angle between the transverse strip plate 1 and the longitudinal strip plate 4 is 90 degrees.
Wherein the sand fixing plate is made of coal gangue porous concrete; the gangue porous concrete comprises the following raw materials in parts by weight: ordinary Portland cement 240 kg/m 3 Water reducing agent 2.4kg/m 3 2.4kg/m of thickening water retention agent 3 Gangue aggregate 1200 kg/m 3 And water 80 kg/m 3 . The particle size of the gangue aggregate is 20-50mm.
The gangue aggregate is clay rock or sandstone gangue; the chemical components are SiO 2 ：61%，Al 2 O 3 ：14%，Fe 2 O 3 ：2.9%，CaO：1.5%，MgO：1.3%。
The weight proportion of the gangue porous concrete is as follows:
table 1: weight ratio
The compressive strength of the gangue porous concrete is as follows:
table 2: compressive Strength test
The preparation method of the assembled gangue porous concrete sand fixation plate comprises the following specific steps:
step one, crushing the coal gangue by using a crusher.
Screening the crushed gangue particles in the first step, wherein the gangue particles with the particle size of 20-50mm are used as aggregate of porous concrete;
step three, preparing a mould of the coal gangue porous concrete horizontal strip plate 1 or the vertical strip plate 4; the height of the transverse slat 1 or the longitudinal slat 4 is 20cm, the thickness is 5cm, the distance between two adjacent first grooves 2 is 1m, and two grooves are arranged on each transverse slat 1 or each longitudinal slat 4.
Step four, preparing coal gangue porous concrete, adding ordinary Portland cement into a mixer, then adding coal gangue aggregate, a water reducing agent and a thickening water retaining agent, and after preliminary mixing, adding water and uniformly mixing;
step five, paving the coal gangue porous concrete in the step four into a mould, putting a first pre-buried reinforcing bar 3 into a lower area of the first groove 2 when the coal gangue porous concrete is paved to half height, and inserting plain round reinforcing bars to manufacture a first lower vent hole 6 and a first upper vent hole 5, and continuously paving the coal gangue porous concrete;
vibrating and compacting the coal gangue porous concrete from the upper part by adopting a vibrator; wherein the loose paving coefficient at the first groove 2 is 1.3; the loose spreading coefficient between the two ends of the transverse slat 1 and the two first grooves 2 is 1.2;
step six, referring to the step five, manufacturing a longitudinal slat 4; after the transverse strip plates 1 are meshed with the longitudinal strip plates 4, the upper and lower surfaces of the unit plates are flush;
and seventhly, removing the mould, and carrying out sprinkling maintenance on the coal gangue porous concrete sand fixation plate for 7 days. The 28-day compressive strength of the coal gangue porous concrete is 12MPa, and the porosity is 15%.
Embodiment 3, a split type coal gangue porous concrete sand fixation plate and a preparation method thereof, which are the same as embodiment 1, and are different in that three first grooves 2 are arranged on a plate body of a transverse slat 1 at intervals, two second grooves 9 are arranged on a plate body of a longitudinal slat 4 at intervals, and the first grooves 2 are mutually matched with the second grooves 9; after the transverse strip plates 1 are meshed with the longitudinal strip plates 4, the upper and lower surfaces of the unit plates are flush.
Embodiment 4, as shown in fig. 5, is a split type gangue porous concrete sand fixation plate and a preparation method thereof, which is the same as embodiment 1, and is different in that three first grooves 2 are arranged on a plate body of a horizontal slat 1 at intervals, and three second grooves 9 are arranged on a plate body of a vertical slat 4 at intervals. The dotted area in fig. 5 is a desert.
The transverse lath 1 or the longitudinal lath 4 provided by the invention is in a strip shape with 2-4 grooves, and a plurality of transverse laths 1 or longitudinal laths 4 are spliced into a groined shape through the grooves. It has no special requirement on the chemical components of the gangue. Not only is beneficial to the resource utilization of coal gangue, which is waste in coal mining, but also is beneficial to desertification control. The service life of the coal gangue porous concrete sand fixing plate is longer than that of a grass square lattice sand fixing method, and the cost is lower than that of a stone square lattice sand fixing method.
The foregoing is merely illustrative of preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any changes or substitutions that would occur to those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. A method for preparing an assembled gangue porous concrete sand fixation plate is characterized in that,
the sand fixing plate comprises a plurality of unit plates, wherein the unit plates are intersected into a grid shape by a horizontal strip plate (1) and a vertical strip plate (4) in a same position; the transverse strip plate (1) is provided with first grooves (2) at intervals on the plate body, first embedded reinforcing bars (3) are arranged along the long side direction of the transverse strip plate (1) and below the first grooves (2), first ventilation holes are reserved along the short side direction of the transverse strip plate (1), and each first ventilation hole comprises first upper ventilation holes (5) arranged on two sides of a notch of the corresponding first groove (2) and first lower ventilation holes (6) arranged on the lower parts of two ends of each first embedded reinforcing bar (3);
the longitudinal plate (4) is provided with second grooves (9) at intervals, and second embedded reinforcing bars are arranged along the longitudinal direction of the longitudinal plate (4) and below the second grooves (9); a second ventilation hole is reserved along the short side direction of the longitudinal strip plate (4), and comprises second upper ventilation holes (7) arranged on two sides of a notch of the second groove (9) and second lower ventilation holes (8) arranged on the lower parts of two ends of the second embedded reinforcement;
the first groove (2) is mutually matched with the second groove (9); after the transverse strip plates (1) are meshed with the longitudinal strip plates (4), the upper surfaces and the lower surfaces of the unit plates are flush; at least two first grooves (2) are arranged, and the depth of the first grooves is equal to half of the height of the transverse slat (1); the second grooves (9) are at least two and have a depth equal to half the height of the longitudinal strips (4); the sand fixing plate is made of coal gangue porous concrete; the gangue porous concrete comprises the following raw materials in parts by weight: 120-140 parts of ordinary Portland cement, 1 part of water reducer, 1 part of thickening and water retaining agent, 450-600 parts of gangue aggregate and 30-40 parts of water; the particle size of the gangue aggregate is 20-50mm;
the method comprises the following specific steps:
crushing coal gangue by using a crusher;
screening the crushed gangue particles in the first step, wherein the gangue particles with the particle size of 20-50mm are used as aggregate of porous concrete;
step three, preparing a mould of the coal gangue porous concrete sand fixation plate;
step four, preparing coal gangue porous concrete, adding ordinary Portland cement into a mixer, then adding coal gangue aggregate, a water reducing agent and a thickening water retaining agent, and after preliminary mixing, adding water and uniformly mixing;
step five, manufacturing a transverse slat (1);
layering the gangue porous concrete in the fourth step into a mould, putting a first pre-buried reinforcing bar (3) into a lower area of the first groove (2) when the gangue porous concrete is paved to half height, and inserting plain round reinforcing bars to manufacture a first lower vent hole (6) and a first upper vent hole (5), and continuously paving the gangue porous concrete;
vibrating and compacting the coal gangue porous concrete from the upper part by adopting a vibrator; wherein the loose paving coefficient at the first groove (2) is 1.2-1.3; the loose paving coefficient between the two ends of the transverse slat (1) and the two first grooves (2) is 1.1-1.2;
step six, referring to the step five to manufacture a longitudinal slat (4); after the transverse strip plates (1) are meshed with the longitudinal strip plates (4), the upper surfaces and the lower surfaces of the unit plates are flush;
and seventhly, removing the mould, and carrying out sprinkling maintenance on the coal gangue porous concrete sand fixation plate for 7 days.
2. The method of claim 1, wherein the gangue aggregate is clay rock or sandstone gangue; the chemical components are SiO 2 ：40%~70%，Al 2 O 3 ：10%-30%，Fe 2 O 3 ：≤6%，CaO：≤10%，MgO：≤2%。
3. The method of claim 1, wherein the gangue porous concrete has a compressive strength of 5-20MPa.
4. The method of manufacture according to claim 1, characterized in that the cross bar (1) and the longitudinal bar (4) are of equal length; the length of the transverse slat (1) is at least 500mm; the height of the transverse slat (1) is equal to the height of the longitudinal slat (4); the height of the transverse strip plate (1) is at least 100mm.
5. The method of manufacture according to claim 1, characterized in that the cross bar (1) and the longitudinal bar (4) have equal thickness; the thickness of the transverse slat (1) is 5-10cm.
6. The method of manufacturing of claim 1, wherein the first vent and the second vent have equal pore diameters; the first vent aperture is: 10-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735107.3A CN110438970B (en) | 2019-08-09 | 2019-08-09 | Assembled gangue porous concrete sand fixation plate and preparation method thereof |
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| JP3200578U (en) * | 2015-08-11 | 2015-10-22 | 有限会社アルコイハラ | Ground improvement auxiliary member, ground improvement auxiliary structure, preparation kit for ground improvement auxiliary structure, and improved ground |
| CN106747244A (en) * | 2017-03-16 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of magnesia oxychloride cement sill, preparation method and its application in preventing and fixing sand |
| CN106915947A (en) * | 2017-03-16 | 2017-07-04 | 中国科学院青海盐湖研究所 | A kind of magnesia oxychloride cement foam concrete fixes the sand plate and preparation method thereof |
| CN107857528A (en) * | 2017-11-03 | 2018-03-30 | 辽宁工程技术大学 | A kind of preparation method of the gangue aggregate without the porous concrete for plant growth of sand |
| CN210766710U (en) * | 2019-08-09 | 2020-06-16 | 中国建筑股份有限公司 | Split mounting type coal gangue porous concrete sand fixation plate |
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| JP3200578U (en) * | 2015-08-11 | 2015-10-22 | 有限会社アルコイハラ | Ground improvement auxiliary member, ground improvement auxiliary structure, preparation kit for ground improvement auxiliary structure, and improved ground |
| CN106747244A (en) * | 2017-03-16 | 2017-05-31 | 中国科学院青海盐湖研究所 | A kind of magnesia oxychloride cement sill, preparation method and its application in preventing and fixing sand |
| CN106915947A (en) * | 2017-03-16 | 2017-07-04 | 中国科学院青海盐湖研究所 | A kind of magnesia oxychloride cement foam concrete fixes the sand plate and preparation method thereof |
| CN107857528A (en) * | 2017-11-03 | 2018-03-30 | 辽宁工程技术大学 | A kind of preparation method of the gangue aggregate without the porous concrete for plant growth of sand |
| CN210766710U (en) * | 2019-08-09 | 2020-06-16 | 中国建筑股份有限公司 | Split mounting type coal gangue porous concrete sand fixation plate |
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