CN117164327B - Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry - Google Patents
Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry Download PDFInfo
- Publication number
- CN117164327B CN117164327B CN202311453110.9A CN202311453110A CN117164327B CN 117164327 B CN117164327 B CN 117164327B CN 202311453110 A CN202311453110 A CN 202311453110A CN 117164327 B CN117164327 B CN 117164327B
- Authority
- CN
- China
- Prior art keywords
- parts
- lightweight aggregate
- natural gas
- aggregate concrete
- mud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000002002 slurry Substances 0.000 title claims abstract description 55
- 239000004567 concrete Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 239000003345 natural gas Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000000843 powder Substances 0.000 claims description 41
- 239000003638 chemical reducing agent Substances 0.000 claims description 33
- 229920005646 polycarboxylate Polymers 0.000 claims description 32
- 239000002893 slag Substances 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 241000209094 Oryza Species 0.000 claims description 27
- 235000007164 Oryza sativa Nutrition 0.000 claims description 27
- 235000009566 rice Nutrition 0.000 claims description 27
- 239000004115 Sodium Silicate Substances 0.000 claims description 22
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 22
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 19
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 19
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 16
- 238000001354 calcination Methods 0.000 claims description 14
- 239000003245 coal Substances 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003546 flue gas Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 235000013339 cereals Nutrition 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 11
- 230000000996 additive effect Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 238000000498 ball milling Methods 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 10
- 238000006297 dehydration reaction Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- -1 alcohol amine Chemical class 0.000 claims description 8
- 229910003002 lithium salt Inorganic materials 0.000 claims description 7
- 159000000002 lithium salts Chemical class 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 2
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 claims description 2
- 239000011325 microbead Substances 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 6
- 239000004566 building material Substances 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 24
- 238000001514 detection method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000012072 active phase Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of cement-based building materials, in particular to a method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry.
Description
Technical Field
The invention relates to the technical field of cement-based building materials, in particular to a method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry.
Background
Natural gas is a relatively pure and clean fossil energy source, and a large amount of slurry is generated in the process of extracting the land natural gas, and the slurry has the characteristics of high oil content, high silt content, high organic matter content, complex components and the like, and is obviously different from lake silt, water treatment sludge and the like. The mud produced by the exploitation of the land natural gas is difficult to degrade in nature, has strong toxicity, belongs to special pollutants and needs to be treated.
The main treatment processes of natural gas exploitation slurry in the prior art comprise pyrolysis, incineration, solidification, cement kiln cooperative treatment, normal-temperature deep desorption, extraction, biodegradation treatment and the like, and in order to realize recycling, part of expert students reprocess the natural gas exploitation slurry and then use the natural gas exploitation slurry for preparing sintered bricks, producing ceramsite and preparing cement clinker as raw materials, however, the slurry consumption in the recycling process is low, the production energy consumption is relatively high, the utilization is rough, and the added value of building material products is not high.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a method for producing lightweight aggregate concrete by using land natural gas exploitation slurry, and in particular relates to a method for preparing lightweight aggregate concrete which has good fluidity, high mechanical property, excellent uniformity and no floating aggregate by adding lightweight aggregate and additive, wherein the slurry produced by land natural gas exploitation is subjected to drying treatment, raw materials are combined with coal gangue and alkaline residue to prepare active powder by calcining, and rice hull ash and steel slag are added to perform alkali excitation reaction.
Specifically, the invention relates to a method for producing lightweight aggregate concrete by using land natural gas exploitation slurry, which comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: (0.2-0.4) mixing uniformly (0.1-0.2), calcining at 750-850 deg.C, quenching, ball milling to particle size less than or equal to 75 μm to obtain active powder,
2) Weighing 300-400 parts of active powder, 100-200 parts of rice hull ash, 30-50 parts of steel slag, 40-60 parts of sodium silicate, 800-1000 parts of lightweight aggregate, 10-15 parts of polycarboxylate water reducer, 5-10 parts of alcohol amine, 3-5 parts of lithium salt, 2-4 parts of polyvinyl alcohol and 200-240 parts of water according to parts by mass,
3) Dissolving a polycarboxylate water reducer, alcohol amine, lithium salt and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (3) molding, demolding and curing the slurry to obtain the modified asphalt.
The land natural gas exploitation slurry is rich in a large amount of oil, contains a large amount of crushed rock scraps and organic matters, is dried and screened, is thermally activated with coal gangue and alkaline residues, utilizes the oil and the organic matters in the slurry as partial fuel to provide heat, eliminates the organic matters in the slurry, supplements partial aluminum sources and calcium sources for the coal gangue and the alkaline residues, pre-excites silicon-aluminum-calcium active phases in the calcining process by alkaline components of the alkaline residues, and jointly regulates and controls the chemical composition and the structure of the glass phases to prepare active powder with a gelatinization effect, and can be directly used as a cementing material to replace cement. The slurry, the coal gangue and the alkaline residue belong to industrial byproducts, hot flue gas generated in the calcination process can be used for drying the slurry, waste heat utilization is realized, natural resources are fully saved, and the energy utilization efficiency is improved.
Preferably, the filter pressing in step 1) adopts a frame filter press, and the hot flue gas is from the waste gas generated by calcination.
Preferably, the grain size of the sludge in the step 1) is less than or equal to 1mm, the grain size of the gangue is less than or equal to 0.1mm, and the grain size of the alkaline residue is less than or equal to 0.1mm.
Preferably, the quenching in step 1) adopts air cooling.
Preferably, the grain size of the rice husk ash in the step 2) is less than or equal to 45 mu m, and the active SiO is 2 The content is more than or equal to 75 percent, and the specific surface area of the steel slag is more than or equal to 550m 2 The content of f-CaO is less than or equal to 0.3 percent per kg.
The active powder prepared by the invention has higher activity, but the prepared slurry has higher water demand and poor flow property, so that other kinds of admixtures are needed to be compounded to be used as cementing materials in the use process, and a large number of experiments prove that the active material has the best compounding use effect with rice hull ash and steel slag, the rice hull ash is finely ground after being subjected to heat treatment, and the active SiO is prepared by the invention 2 The content of the steel slag is higher, the steel slag has a certain alkalinity, a certain excitation effect can be achieved while hydration reaction is performed, and part of free calcium oxide in the steel slag can be consumed by the active powder and the rice hull ash, so that the stability of the cementing material is ensured, the viscosity and the volume weight of concrete slurry composed of the active powder, the rice hull ash and the steel slag are moderate, and the lightweight aggregate is easy to disperse uniformly in the slurry without adding any thickening agent.
Preferably, the lightweight aggregate in the step 2) is at least one of ceramsite, expanded perlite and vitrified microbead, and the particle size is 2-10mm continuous grading.
Preferably, the polycarboxylate water reducer in the step 2) is an ether polycarboxylate water reducer or an ester polycarboxylate water reducer, and the water reducing rate is more than or equal to 25%. The water reducer is added to reduce the water consumption of concrete and improve the fluidity of concrete, and experiments show that the concrete slurry simply adopting the polycarboxylate water reducer has partial segregation phenomenon, which is probably due to bad effect of the adaptability of the active powder and the polycarboxylate water reducer, and the adaptability problem of the active powder and the polycarboxylate water reducer can be eliminated by adding part of polyvinyl alcohol and the polycarboxylate water reducer for compounding use.
Preferably, the alcohol amine in the step 2) is at least one of diethanolamine, triethanolamine and triisopropanolamine.
Preferably, the lithium salt in the step 2) is at least one of lithium carbonate, lithium nitrate and lithium sulfate.
According to the invention, sodium silicate is used as an exciting agent to excite the cementing material composed of active powder, rice hull ash and steel slag, and as the high-activity cementing material such as silica fume, fly ash and the like is not added, the early strength component is added to improve the hydration rate of the cementing material, and experiments show that the effect of adding alcohol amine and lithium salt is optimal, and the two are cooperated with the sodium silicate to improve the hydration activity of the cementing material and the mechanical property of concrete.
Preferably, the curing in step 5) is standard curing.
The invention has the following technical advantages:
1. the invention adopts the onshore natural gas production slurry to prepare the active powder through activation, solves the pollution caused by the stockpiling of the onshore natural gas production slurry, realizes the recycling of high added value,
2. the cementing material of the invention is from industrial solid waste, can completely replace cement to prepare lightweight aggregate concrete, realizes environmental protection and waste utilization,
3. the slurry prepared by the cementing material is suitable for the production of lightweight aggregate concrete, does not need to add a thickening agent, is simple and easy to operate,
4. the invention adopts the compound admixture to improve the workability and mechanical property of the concrete, ensures the construction property of the concrete,
5. the lightweight aggregate concrete disclosed by the invention is green and environment-friendly, good in fluidity, high in mechanical property, free from floating up, and good in adaptability.
Detailed Description
To characterize the technical effect of the invention, lightweight aggregate concrete is prepared and the construction performance thereof is carried outAnd (5) detecting. Wherein, the grain diameter of sludge is less than or equal to 1mm, the grain diameter of gangue is less than or equal to 0.1mm, the grain diameter of alkali slag is less than or equal to 0.1mm, the grain diameter of rice hull ash is less than or equal to 45 mu m, and active SiO is produced in the preparation process of lightweight aggregate concrete 2 The content is 86 percent, and the specific surface area of the steel slag is 600m 2 The content of f-CaO per kg is 0.2%, the lightweight aggregate adopts ceramsite, the particle size is 2-10mm, the polycarboxylate water reducer adopts ether polycarboxylate water reducer, and the water reduction rate is 27.2%.
Example 1
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing uniformly at a ratio of 0.3:0.1, calcining at 800 ℃, quenching, ball milling to a particle size of less than or equal to 75 mu m to obtain active powder,
2) Weighing 350 parts of active powder, 180 parts of rice hull ash, 30 parts of steel slag, 50 parts of sodium silicate, 900 parts of lightweight aggregate, 12 parts of polycarboxylate water reducer, 7 parts of triethanolamine, 4 parts of lithium nitrate, 2 parts of polyvinyl alcohol and 220 parts of water according to parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine, lithium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 700mm, the rewinding time is 5.2s, the workability is good, the lightweight aggregate does not float, and the 28d compressive strength is 48.6MPa.
Example 2
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing 0.25:0.15 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 8 parts of triethanolamine, 4 parts of lithium nitrate, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to the parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine, lithium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 710mm, the rewinding time is 4.9s, the workability is good, the lightweight aggregate does not float, and the 28d compressive strength is 50.3MPa.
Comparative example 1
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue and the coal gangue are mixed according to the mass ratio of 1: mixing 0.25 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 8 parts of triethanolamine, 4 parts of lithium nitrate, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to the parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine, lithium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
The detection shows that the initial fluidity of the lightweight aggregate concrete is 690mm, the rewinding time is 3.4s, the concrete is slightly hardened, the lightweight aggregate does not float, and the 28d compressive strength is 41.5MPa.
Comparative example 2
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) The mud is subjected to filter pressing and preliminary dehydration, hot flue gas is utilized for drying and screening to obtain mud residue, the mud residue is calcined at the temperature of 820 ℃ and then quenched, the ball milling is carried out until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 8 parts of triethanolamine, 4 parts of lithium nitrate, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to the parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine, lithium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 740mm, the rewinding time is 5.9s, the workability is poor, the slurry is isolated, the lightweight aggregate floats upwards, and the 28d compressive strength is 37.6MPa.
Comparative example 3
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing 0.25:0.15 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of fly ash, 45 parts of mineral powder, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 8 parts of triethanolamine, 4 parts of lithium nitrate, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to the parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine, lithium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, the fly ash, the mineral powder, the sodium silicate and the lightweight aggregate are evenly mixed, the admixture solution is added and evenly mixed to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the lightweight aggregate concrete is seriously isolated, and detection and forming cannot be performed.
Comparative example 4
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing 0.25:0.15 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 8 parts of triethanolamine, 4 parts of lithium nitrate and 220 parts of water are weighed according to the parts by mass,
3) The polycarboxylate water reducer, triethanolamine and lithium nitrate are dissolved in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 650mm, the rewinding time is 6.6s, the workability is poor, hardening and segregation are carried out after standing, the lightweight aggregate floats upwards, and the 28d compressive strength is 44.5MPa.
Comparative example 5
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing 0.25:0.15 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 12 parts of sodium nitrate, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to parts by mass,
3) Dissolving a polycarboxylate water reducer, sodium nitrate and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 700mm, the rewinding time is 5.1s, the workability is good, the lightweight aggregate does not float, and the 28d compressive strength is 36.8MPa.
Comparative example 6
The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry comprises the following steps:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: mixing 0.25:0.15 evenly, calcining at 820 ℃, quenching, ball milling until the particle size is less than or equal to 75 mu m to obtain active powder,
2) 380 parts of active powder, 170 parts of rice hull ash, 45 parts of steel slag, 55 parts of sodium silicate, 900 parts of lightweight aggregate, 13 parts of polycarboxylate water reducer, 10 parts of triethanolamine, 3 parts of polyvinyl alcohol and 220 parts of water are weighed according to the parts by mass,
3) Dissolving a polycarboxylate water reducer, triethanolamine and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (5) molding, demolding and standard curing the slurry to 28d to obtain the finished product.
Through detection, the initial fluidity of the lightweight aggregate concrete is 690mm, the rewinding time is 4.6s, the workability is good, the lightweight aggregate does not float, and the 28d compressive strength is 43.4MPa.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for producing the lightweight aggregate concrete by using the land natural gas exploitation slurry is characterized by comprising the following steps of:
1) After the mud is subjected to filter pressing and preliminary dehydration, the mud is dried by hot flue gas and screened to obtain mud residue, and the mud residue, coal gangue and alkaline residue are mixed according to the mass ratio of 1: (0.2-0.4) mixing uniformly (0.1-0.2), calcining at 750-850 deg.C, quenching, ball milling to particle size less than or equal to 75 μm to obtain active powder,
2) Weighing 300-400 parts of active powder, 100-200 parts of rice hull ash, 30-50 parts of steel slag, 40-60 parts of sodium silicate, 800-1000 parts of lightweight aggregate, 10-15 parts of polycarboxylate water reducer, 5-10 parts of alcohol amine, 3-5 parts of lithium salt, 2-4 parts of polyvinyl alcohol and 200-240 parts of water according to parts by mass,
3) Dissolving a polycarboxylate water reducer, alcohol amine, lithium salt and polyvinyl alcohol in water to obtain an additive solution,
4) The active powder, rice hull ash, steel slag, sodium silicate and lightweight aggregate are added into the mixture to be uniformly mixed after being dried and stirred, so as to obtain slurry,
5) And (3) molding, demolding and curing the slurry to obtain the modified asphalt.
2. The method for producing lightweight aggregate concrete by using onshore natural gas production mud according to claim 1, wherein the step 1) of press filtration adopts a frame filter press, and the hot flue gas is from the exhaust gas generated by calcination.
3. The method for producing lightweight aggregate concrete by using land natural gas production mud according to claim 1, wherein the grain size of the mud slag is less than or equal to 1mm, the grain size of the coal gangue is less than or equal to 0.1mm, and the grain size of the alkaline slag is less than or equal to 0.1mm in step 1).
4. The method for producing lightweight aggregate concrete using land natural gas production mud according to claim 1, wherein the quenching in step 1) adopts air cooling.
5. The method for producing lightweight aggregate concrete using land natural gas production mud as set forth in claim 1, wherein in step 2), the grain size of the rice hull ash is 45 μm or less, and the active SiO 2 The content is more than or equal to 75 percent, and the specific surface area of the steel slag is more than or equal to 550m 2 The content of f-CaO is less than or equal to 0.3 percent per kg.
6. The method for producing lightweight aggregate concrete by using land natural gas production mud according to claim 1, wherein the lightweight aggregate in the step 2) is at least one of ceramsite, expanded perlite and vitrified microbead, and has a continuous gradation of 2-10mm in particle size.
7. The method for producing lightweight aggregate concrete by using land natural gas production mud according to claim 1, wherein the polycarboxylate water reducer in the step 2) is an ether polycarboxylate water reducer or an ester polycarboxylate water reducer, and the water reduction rate is more than or equal to 25%.
8. The method for producing lightweight aggregate concrete by using land natural gas production mud according to claim 1, wherein the alcohol amine in the step 2) is at least one of diethanolamine, triethanolamine and triisopropanolamine.
9. The method for producing lightweight aggregate concrete using onshore natural gas production mud according to claim 1, wherein the lithium salt in step 2) is at least one of lithium carbonate, lithium nitrate and lithium sulfate.
10. The method for producing lightweight aggregate concrete using onshore natural gas production mud according to claim 1, wherein the curing in step 5) adopts standard curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311453110.9A CN117164327B (en) | 2023-11-03 | 2023-11-03 | Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311453110.9A CN117164327B (en) | 2023-11-03 | 2023-11-03 | Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117164327A CN117164327A (en) | 2023-12-05 |
| CN117164327B true CN117164327B (en) | 2023-12-29 |
Family
ID=88930323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311453110.9A Active CN117164327B (en) | 2023-11-03 | 2023-11-03 | Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117164327B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265066A (en) * | 2008-04-23 | 2008-09-17 | 深圳大学 | High folding resistance road concrete material and preparing method thereof |
| CN111892325A (en) * | 2020-08-07 | 2020-11-06 | 湖北工业大学 | Preparation method of wet-milling dechlorination nano-alkali residue inorganic salt early strength agent |
| CN112047693A (en) * | 2020-09-14 | 2020-12-08 | 江西龙正科技发展有限公司 | RPC cover plate for road and preparation method thereof |
| CN113213787A (en) * | 2021-05-28 | 2021-08-06 | 王庆乐 | Production process for preparing alkali cementing material from coal gangue |
-
2023
- 2023-11-03 CN CN202311453110.9A patent/CN117164327B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265066A (en) * | 2008-04-23 | 2008-09-17 | 深圳大学 | High folding resistance road concrete material and preparing method thereof |
| CN111892325A (en) * | 2020-08-07 | 2020-11-06 | 湖北工业大学 | Preparation method of wet-milling dechlorination nano-alkali residue inorganic salt early strength agent |
| CN112047693A (en) * | 2020-09-14 | 2020-12-08 | 江西龙正科技发展有限公司 | RPC cover plate for road and preparation method thereof |
| CN113213787A (en) * | 2021-05-28 | 2021-08-06 | 王庆乐 | Production process for preparing alkali cementing material from coal gangue |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117164327A (en) | 2023-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108640547B (en) | Iron tailing/metakaolin based geopolymer and preparation method thereof | |
| CN111205003B (en) | Preparation method of regenerated cementing material | |
| CN111559899A (en) | Recycled material terrace brick and preparation method thereof | |
| CN113213789B (en) | Paving brick prepared based on household garbage incineration fly ash and preparation method thereof | |
| CN103693916A (en) | Lightweight aggregate concrete and preparation method thereof | |
| CN113072313B (en) | Method for preparing ecological concrete by cooperatively utilizing waste residues and wastewater in coal chemical industry | |
| CN114671633B (en) | Full-solid-waste clinker-free cementing material, conductive mortar and preparation method thereof | |
| CN113526890A (en) | Concrete composite admixture for comprehensively utilizing industrial waste residues and construction wastes | |
| CN115677248B (en) | Carbon-fixing lightweight aggregate and preparation method thereof | |
| CN112608043A (en) | High-strength nickel slag-based solid waste cementing material and preparation method thereof | |
| CN105645794A (en) | Preparation method of Portland cement with high-content industrial waste residues | |
| CN113999039A (en) | In-situ whisker reinforced autoclaved aerated concrete prepared from gasified slag and preparation method thereof | |
| CN113603440A (en) | Non-fired water permeable brick based on granite waste and coal slag and preparation method thereof | |
| CN112341107A (en) | Method for energy-saving production of composite high-strength cement by using various industrial wastes | |
| CN115340307A (en) | Solid waste based low-carbon high-iron phase-belite system concrete and synergistic solid waste carbon fixation method thereof | |
| CN116924711A (en) | Full solid waste cementing material and preparation method and application thereof | |
| CN111233353A (en) | Method for producing general cement clinker by using iron oxide slag to partially replace iron correction raw material | |
| CN114230208A (en) | High-strength cement and preparation method thereof | |
| CN101412595A (en) | Method for preparing concrete admixture from kaoline tailing | |
| CN112694272B (en) | Low-carbon high-strength cementing material prepared from coal gangue power plant solid waste and preparation method thereof | |
| CN117164327B (en) | Method for producing lightweight aggregate concrete by using onshore natural gas exploitation slurry | |
| CN104876464B (en) | A kind of graft-modification method of fiber reinforced flyash | |
| CN113511881B (en) | Formula and method for preparing foamed ceramic by using overhaul slag | |
| CA3226592A1 (en) | Dry grinding of mineral materials, ground mineral materials, and their use in construction materials | |
| CN111548031B (en) | Mineral powder prepared from industrial waste residues and neutralized residues and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |