NL2028365B1 - Dual permeation-proof method based on coal-based solid wastes - Google Patents
Dual permeation-proof method based on coal-based solid wastes Download PDFInfo
- Publication number
- NL2028365B1 NL2028365B1 NL2028365A NL2028365A NL2028365B1 NL 2028365 B1 NL2028365 B1 NL 2028365B1 NL 2028365 A NL2028365 A NL 2028365A NL 2028365 A NL2028365 A NL 2028365A NL 2028365 B1 NL2028365 B1 NL 2028365B1
- Authority
- NL
- Netherlands
- Prior art keywords
- fly ash
- permeation
- coal
- cement
- resistant
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000009977 dual effect Effects 0.000 title claims abstract description 24
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 239000002910 solid waste Substances 0.000 title claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 78
- 239000000463 material Substances 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 40
- 229920000642 polymer Polymers 0.000 claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 4
- 239000000706 filtrate Substances 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 229910052785 arsenic Inorganic materials 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000000084 colloidal system Substances 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 2
- 229910052753 mercury Inorganic materials 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 229910018557 Si O Inorganic materials 0.000 abstract 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 10
- 239000002699 waste material Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 239000003469 silicate cement Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 241000537371 Fraxinus caroliniana Species 0.000 description 2
- 235000010891 Ptelea trifoliata Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000206607 Porphyra umbilicalis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
-
- 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
-
- 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
- C04B28/08—Slag cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/32—Reclamation of surface-mined areas
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to the technical field of ecological restoration and management of mines, and particularly relates to a dual permeation-proof method for filling open pits, gullies and so on by using coal-based solid wastes, wherein: a dual permeation-proof method based on coal-based solid wastes, wherein the fly ash used in the fly ash-based cementing material is about 90%, a small amount of heavy metals, Hg, As, S and other harmful substances in the fly ash are stabilized and fixed in a form of “involved in bonding, cured and stored” in synergistic reactions with other components, and the internal structure of the cementing material is dense and impermeable, thereby providing a layer of hard protective shell for the pit bottom, in the polymer waterproof coating, which is a flexible protective material, on the surface of the cementing material, the addition amount of the fly ash takes 60%-90% of the powder materials, and Ca2+ will be released during hydration reaction of cement according to the colloid surface chemical principle, hydrolyzed emulsion, with Ca2+ as the bridging, reacts with surface groups of fly ash and generates organic-inorganic gel products with [R—COO']Ca2+ [-Si-O'] as unit structure, so as to form an inter-facially compatible waterproof layer which is uniform and compact, thereby repairing little cracks of underlying cementing material. The dual impermeable structure like this has a small permeable coefficient, and can prevent permeation of filtrate.
Description
DUAL PERMEATION-PROOF METHOD BASED ON COAL-BASED SOLID WASTES Technical Field The present invention relates to the technical field of ecological restoration and management of mines, and particularly relates to a dual permeation-proof method for filling open pits, gullies and so on by using coal-based solid wastes. Background At present, coal gangue, slag and tailings and other mining wastes, as well as construction wastes and so on are usually used as fillers for backfilling natural gullies, mining pits or the like. However, coal gangue contains trace heavy metals, such as Cd, Pb, Ni, Zn, Cr and Cu, and different mining slag and tailings may also contain different heavy metals. Due to long-term rain leaching, the heavy metals may be transported and accumulated, and thus contaminate underground water and surrounding land.
For some foreign mines, the bottoms of the pits and gullies will be leveled before the filling of wastes and slag, and geo-membranes will be laid in advance so as to prevent the permeation of leachate. But geo-membranes have higher cost and limited mechanical strength, and may be easily broken by large slag blocks during subsequent backfilling, so permeation points may be formed; moreover, geo-membranes are prone to aging and failure, as a result of which contaminants may diffuse towards the underground environment.
Hence, it is urgent to develop a permeation-proof method which is efficient and inexpensive, so as to provide strong technical support for safe backfilling of wastes and slag into open pits or gullies.
Summary of the Invention In order to overcome the deficiencies of existing permeation-proof technology, the present invention provides a dual permeation-proof method based on solid waste materials.
To solve the above technical problem, the present invention adopts a technical solution as follows: a dual permeation-proof method based on coal-based solid wastes, including: leveling a pit or gully, and laying and compacting a fly ash-based cementing material; and spraying a layer of polymer waterproof coating on a surface of the fly ash-based cementing material after it is cured, thereby forming a dual permeation-proof structure after full curing, Further, the fly ash-based cementing material has a thickness of 5-10 cm.
Further, the fly ash-based cementing material is prepared by mixing fly ash, ultrafine fly ash, cement and water, wherein a mass ratio of fly ash: ultrafine fly ash: cement is (6-8): (1-2): 1, and a water-cement ratio is (2-3): 10.
Further, the fly ash is fly ash of pulverized coal furnaces or fly ash of circulating fluidized bed boilers; the ultrafine fly ash is fly ash after ultrafine grinding with a particle size of 5-10 um; and the cement is ordinary silicate or slag silicate.
Further, the polymer waterproof coating has a thickness of 2-3 mm.
Further, the polymer waterproof coating is an organic-inorganic composite coating made by mixing fly ash, cement and an emulsion; the fly ash has a mixing amount of 60%-90% of powder fillers; and a ratio of the emulsion to the powder fillers is 0.1-0.3.
Further, the emulsion is a styrene-acrylic emulsion and/or an acrylic emulsion.
Further, a specific preparation method of the polymer waterproof coating including: mixing fly ash with cement so as to obtain a powder material, blending the emulsion with water at a low speed, adding the powder material and stirring for 15 min at a constant speed, thereby obtaining the polymer waterproof coating.
Relative to prior art, the present invention has the following beneficial technical effects.
The present invention provides a dual permeation-proof method based on coal-based solid wastes, wherein the fly ash used in the fly ash-based cementing material is about 90%, a small amount of heavy metals, Hg, As, S and other harmful substances in the fly ash are stabilized and fixed in a form of “involved in bonding, cured and stored” in synergistic reactions with other components, and the internal structure of the cementing material is dense and impermeable, thereby providing a layer of hard protective shell for the pit bottom; in the polymer waterproof coating, which is a flexible protective material, on the surface of the cementing material, the addition amount of the fly ash takes 60%-90% of the powder materials, and Ca?’ will be released during hydration reaction of cement according to the colloid surface chemical principle, hydrolyzed emulsion, with Ca?” as the bridging, reacts with surface groups of fly ash and generates organic-inorganic gel products with [R-COO]Ca?* [-Si-O7] as unit structure, so as to form an inter-facially compatible waterproof layer which is uniform and compact, thereby repairing little cracks of underlying cementing material.
The dual impermeable structure like this has a small permeation coefficient, and can effectively prevent permeation of filtrate.
The solid waste materials of the present invention from the circulating fluidized bed boilers have a slightly higher content of free calcium oxide, which will expand to a certain extent.
After the pit or gully is filled on the basis of the present invention, the filler will limit the expansion of the cementing material, so that the cementing material has a more compact structure and a better permeation-proof effect.
The dual permeation-proof method of the present invention uses solid wastes as the main raw material, treats wastes with processes of wastes and turns wastes into wealth; the permeation-proof effect is as good as the film laying method while the weather resistance and aging resistance are better and the comprehensive disposal costs are reduced by about 15-30%. Description of Drawings Fig. 11s a diagram of the dual permeation-proof structure; Fig. 2 is an SEM diagram of the internal structure of the coating in Embodiment 3; Fig. 3 is a surface picture of the sample in Embodiment 3 after being tested for 30 min by a water impermeability tester; Fig. 4 is an SEM diagram of the internal structure of the coating in Embodiment 3; Fig. 5 is a surface picture of the sample in Embodiment 4 after being tested for 30 min by the water impermeability tester.
Embodiments Technical solutions in the embodiments of the present invention will be clearly and completely described below.
Obviously, the embodiments described here are merely a part of embodiments of the present invention rather than all.
Based on the embodiments of the present invention, any other embodiment, which is obtained by ordinary technicians without paying creative efforts, belongs to the scope of protection of the present invention.
A dual permeation-proof method based on coal-based solid wastes, including: leveling a pit or gully, and laying and compacting a fly ash-based cementing material; and spraying a layer of polymer waterproof coating on a surface of the fly ash-based cementing material after it is cured, thereby forming a dual permeation-proof structure after full curing. The dual permeation-proof structure is shown in Fig. 1. In this embodiment, the fly ash-based cementing material has a thickness of 5-10 cm. The fly ash-based cementing material is prepared by mixing fly ash, ultrafine fly ash, cement and water; wherein a mass ratio of fly ash: ultrafine fly ash: cement is (6-8): (1-2): 1, and a water-cement ratio is (2-3): 10. The fly ash is fly ash of a pulverized coal furnace or fly ash of a circulating fluidized bed boiler; the ultrafine fly ash is fly ash after ultrafine grinding with a particle size of 5-10 um; and the cement is ordinary silicate or slag silicate.
In this embodiment, the polymer waterproof coating has a thickness of 2-3 mm. The polymer waterproof coating is an organic-inorganic composite coating made by mixing fly ash, cement and an emulsion; the fly ash has a mixing amount of 60%-90% of powder fillers; and a ratio of the emulsion to the powder fillers is 0.1-0.3. The emulsion is a styrene-acrylic emulsion and/or an acrylic emulsion. A specific preparation method of the polymer waterproof coating including: mixing fly ash with cement so as to obtain a powder material, blending the emulsion with water at a low speed, adding the powder material and stirring for 15 min at a constant speed, thereby obtaining the polymer waterproof coating.
Embodiment 1 Fly ash-based cementing material 70 kg of fly ash of circulating fluidized bed boilers, 20 kg of fly ash of circulating fluidized bed boilers with a particle size of 5-10 um, and 10 kg of slag silicate cement labeled with 32.5 were mixed, then 22 kg of water was added and stirring was continued till they were uniform, as a result of which a fly ash-based cementing material was obtained. After curing, it was measured by a mechanical strength tester that the compressive strength of one day was 3.8 MPa, the compressive strength of three days was 8.5 MPa, and the compressive strength of seven days was 21.6 MPa.
Embodiment 2 Fly ash-based cementing material 80 kg of fly ash of circulating fluidized bed boilers, 10 kg of fly ash of circulating fluidized bed boilers with a particle size of 5-10 um, and 10 kg of ordinary silicate cement labeled with 32.5 were mixed, then 25 kg of water was added and stirring was continued till they were uniform, as a result of which a fly ash-based cementing material was obtained.
After curing, it was measured by a mechanical strength tester that the compressive strength of one day was 3.4 MPa, the compressive strength of three days was 8.3 MPa, and the 5 compressive strength of seven days was 20.3 MPa.
Embodiment 3 Polymer waterproof coating 60 kg of fly ash of circulating fluidized bed boilers with a particle size of 5-10 um was mixed with 40 kg of slag silicate cement labeled with 32.5, as a result of which a powder material was obtained; 30 kg of S400F-type styrene-acrylic emulsion and 40 kg of water were stirred at a low speed for 2 min, and then the powder material mixed in advance was added, and the stirring was continued at a constant rotation speed of 600 r/min for 15 min, thereby obtaining a polymer waterproof coating.
The polymer waterproof coating was poured into a round mold frame of ¢200 for sampling and natural maintenance of 7 days, thereby obtaining a sample with a thickness of 2.8 mm.
The coating section, as shown in Fig. 2, has no holes in the interior and has a compact and firm structure.
After being tested for 30 min by a water permeability tester, it was proved that the sample was impermeable.
As shown in Fig. 3, the surface of the coating is still compact after test, and has no obvious holes thereon.
Embodiment 4 Polymer waterproof coating 80 kg of fly ash of circulating fluidized bed boilers with a particle size of 5-10 um was mixed with 20 kg of slag silicate cement labeled with 32.5, as a result of which a powder material was obtained; 20 kg of acrylic emulsion and 50 kg of water were stirred at a low speed for 2 min, and then the powder material mixed in advance was added, and the stirring was continued at a constant rotation speed of 600 r/min for 15 min, thereby obtaining a polymer waterproof coating.
The polymer waterproof coating was poured into a round mold frame of 9200 for sampling and natural maintenance of 7 days, thereby obtaining a sample with a thickness of 2.6 mm.
The coating section, as shown in Fig. 4, has a compact and firm structure in interior and no obvious holes.
After being tested for 30 min by a water permeability tester, it was proved that the sample was impermeable. As shown in Fig. 3, the surface of the coating after test has tiny holes which are shallow and impermeable.
Embodiment 5 The fly ash-based cementing material according to Embodiment 1 was laid at a thickness of about 6 cm on a simulative soil layer and was compacted, and, after curing, a layer of the polymer waterproof coating of Embodiment 3, which has a thickness of about
2.5 mm, was sprayed on the fly ash-based cementing material after curing, thereby forming a dual permeation proof structure of “cured by cementing + blocked by coating”. It was tested that this structure had a permeation coefficient of 1.7x107 m/s, and was capable of effectively blocking permeation of filtrate towards underground environment.
The cost accounting is shown in Table 1, wherein the cost of fly ash-based cementing material is 2.59 yuan/m?, the cost of the polymer waterproof coating material is 6.42 yuan/m?, and the construction and labor cost of simple leveling, laying, compaction and spraying at the pit bottom in earlier stage is about 16 yuan/m?, so the implementation cost of the dual permeation-proof method of the present invention is about 25.0 yuan/m?.
As for permeation-proofing by means of conventional membrane laying, high-density polyethylene permeation-proof membranes with a thickness of 0.5-0.75 mm, which cost 10-15 yuan/m’, will be used, and the pit bottom needs to be carefully leveled by being laid with a thick layer of loess (which costs 40 yuan/m*) before the membrane is laid, and, together with the construction and labor cost and so on, the membrane permeation-proof method comprehensively costs about 30 yuan/m}.
Compared with the membrane method, the cost of the present invention is reduced by more than 16.7%.
Table 1 Cost accounting table of Embodiment 5 Fly ash-based cementing material Polymer water-proof coating classification Cement Cement Ratio Fly ash Ultra-fine labeled Water Ultra-fine | labeled Emulsion | Water ash with ash with
32.5 32.5 a Usage 0.7 0.2 0.1 | 022 0.6 0.4 0.3 0.4 amount (ton) 25 vuan was reduced from Price environmental - (vuan/ton) | tax. and the 80 300 3 80 300 8000 3 freight was 20 yuan Subtotal 3,5 16 30 | 0.66 48 120 | 2400 | 1.2 (yuan/ton) (2 ton/m") 43.16 yuan/m’ 2569.2 yuan/1.7 ton (about Im’) Equivalent | (Cementing material with a thickness of 6 cm) | (Laver sprayed with a thickness of about costs 2.59 vuan/m? 25mm) 642 yuan/m* Embodiment 6 The fly ash-based cementing material according to Embodiment 2 was laid at a thickness of about 6 cm on a simulative soil layer and was compacted, and, after curing, a layer of the polymer waterproof coating of Embodiment 4, which has a thickness of about
2.5 mm, was sprayed on the fly ash-based cementing material after curing, thereby forming a dual permeation proof structure of “cured by cementing + blocked by coating”. It was tested that this structure had a permeation coefficient of 6.3x10° m/s, and was capable of effectively blocking permeation of filtrate towards underground environment.
The cost accounting is shown in Table 2, wherein the cost of fly ash-based cementing material is 2.09 yuan/m?, the cost of the polymer waterproof coating material is 4.31 yuan/m?, and the construction and labor cost of simple leveling, laying, compaction and spraying at the pit bottom in earlier stage is about 16 yuan/m?, so the implementation cost of the dual permeation-proof method of the present invention is about 22.40 yuan/m’. The membrane permeation-proof method comprehensively costs about 30 yuan/m®. Compared with the membrane method, the cost of the present invention is reduced by more than 25.3%.
Table 2 Cost accounting table of Embodiment 6 Fly ash-based cementing material Polymer water-proof coating classification Cement Cement Ratio Fly ash Ultra-fine labeled Water Ultra-fine | labeled Emulsion | Water ash with ash with
32.5 32.5 Usage z 09, 2 5
ENE EEEN Usage 0.8 0.1 0.1 | 0.25 0.8 0.2 0.2 0.5 amount (ton) 25 vuan was reduced from Price environmental - (uanfion) | tax. and the 80 300 3 80 300 8000 3 freight was 20 yuan Subtotal 4 30 | 0.75 64 60 1600 | 15 (yuan/ton) (2 to/m") 34.75 yuan/m’ 1725.5 yuan/1.7 ton (about Im’) Equivalent | (Cementing material with a thickness of 6 cm) | (Layer sprayed with a thickness of about costs 2.09 vuan/m? 25mm) 4.31 yuan/m? In this embodiment, filling, reclamation, greening or construction and other processes can be performed as long as the dual permeation-proof structure is finished. The above are detailed descriptions of better embodiments of the present invention, but the present invention is not limited thereto. Based on the knowledge scope of ordinary technicians in this field, variations can be made without deviating from the principle of the present invention, all of which should be included within the scope of protection of the present invention.
Claims (8)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119446.6A CN112723833B (en) | 2021-01-28 | 2021-01-28 | Double seepage-proofing method based on coal-based solid waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2028365B1 true NL2028365B1 (en) | 2022-08-31 |
Family
ID=75594396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2028365A NL2028365B1 (en) | 2021-01-28 | 2021-06-01 | Dual permeation-proof method based on coal-based solid wastes |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112723833B (en) |
| NL (1) | NL2028365B1 (en) |
| WO (1) | WO2022160485A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104650664A (en) * | 2015-02-10 | 2015-05-27 | 山西大学 | Gas plugging coating for wall surface of mine laneway |
| CN109989430A (en) * | 2019-04-17 | 2019-07-09 | 内蒙古科技大学 | A kind of environmentally friendly durable impervious leakage preventing structure of solid waste base novel and impervious barrier material |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001293449A (en) * | 2000-02-10 | 2001-10-23 | Taihei Kogyo Co Ltd | Impervious structural material and execution method for the same |
| CN1270198A (en) * | 2000-04-26 | 2000-10-18 | 刘兴才 | Impervious leakage-stopping expanding powder for grout used for water conservancy facilities |
| CN1326954C (en) * | 2003-05-08 | 2007-07-18 | 同济大学 | Polymer cement based composite waterproof coating material for construction and its preparation |
| CN1317458C (en) * | 2005-07-14 | 2007-05-23 | 西北农林科技大学 | Construction method of channel seam seepage control |
| JP2013231706A (en) * | 2012-05-01 | 2013-11-14 | Kazuhiko Takagi | Radioactive cesium solidification agent and landfill disposal method using the same |
| CN109265125A (en) * | 2018-09-27 | 2019-01-25 | 铜陵铜冠建安新型环保建材科技有限公司 | A kind of pit filling preparation method of environment-friendly type cementitious material |
| CN110054455B (en) * | 2019-04-24 | 2021-07-30 | 内蒙古大雁矿业集团有限责任公司 | Flyash-based anti-seepage material for anti-seepage closure underground curtain wall and construction method |
-
2021
- 2021-01-28 CN CN202110119446.6A patent/CN112723833B/en active Active
- 2021-04-25 WO PCT/CN2021/089541 patent/WO2022160485A1/en active Application Filing
- 2021-06-01 NL NL2028365A patent/NL2028365B1/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104650664A (en) * | 2015-02-10 | 2015-05-27 | 山西大学 | Gas plugging coating for wall surface of mine laneway |
| CN109989430A (en) * | 2019-04-17 | 2019-07-09 | 内蒙古科技大学 | A kind of environmentally friendly durable impervious leakage preventing structure of solid waste base novel and impervious barrier material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112723833B (en) | 2022-06-03 |
| WO2022160485A1 (en) | 2022-08-04 |
| CN112723833A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105948617B (en) | A kind of cracking resistance, impervious mortar and preparation method thereof | |
| CN107311488A (en) | The hydraulic cementing materials being excited into is closed by raw material of a variety of Industrial Solid Wastes | |
| Qin et al. | Reuse of soil-like material solidified by a biomass fly ash-based binder as engineering backfill material and its performance evaluation | |
| CN101805161B (en) | Bonding agent of baking-free bricks prepared from drilling well solid waste materials | |
| NL2028366B1 (en) | Method for ecological filling with mixed coal gangue and fly ash | |
| Dong et al. | Core-Shell structured ceramsite made by excavated soil and expanded perlite through cold-bonded technology | |
| Sun et al. | Grouting material development and dynamic grouting test of broken rock mass | |
| CN105130349A (en) | Foundation pit engineering waterproof curtain material based on industrial waste residue | |
| Cui et al. | Comparative research on the application of slag as an alternative to cement in binder-bentonite cutoff wall backfills | |
| Yu et al. | A novel approach to utilizing dredged materials at the laboratory scale | |
| CN105503066A (en) | Polymer waterproof mortar and application thereof | |
| Wang et al. | Engineering properties of soil-based controlled low-strength materials made from local red mud and silty soil | |
| NL2028365B1 (en) | Dual permeation-proof method based on coal-based solid wastes | |
| Bakr et al. | Assessment of the mechanical and durability characteristics of bio-mineralized Bacillus subtilis self-healing concrete blended with hydrated lime and brick powder | |
| CN103193439A (en) | Sealing material for container with high integrity and preparation method as well as application thereof | |
| KR102015563B1 (en) | Folwable landfill cover soil composition | |
| CN109734399B (en) | Method for laying composite impermeable layer | |
| CN107285727B (en) | Baking-free water permeable brick prepared from waste slag soil and preparation process thereof | |
| Chen et al. | A study on the mixed properties of green controlled low strength cementitious | |
| KR102106528B1 (en) | Folwable landfill cover soil composition | |
| Liu et al. | Influence of composition of curing agent and sand ratio of engineering excavated soil on mechanical properties of fluidized solidified soil | |
| CN109650830B (en) | Composite gel impermeable material and composite impermeable layer | |
| JP2001002956A (en) | Water-impervious material | |
| CN107162516B (en) | A kind of curing agent and its application method for curing process discarded slurry | |
| Syafrudin et al. | Geostability of dewatered sludge as landfill cover material |