CN116425482A - Underground high-pressure gas storage chamber lining concrete and preparation method thereof - Google Patents
Underground high-pressure gas storage chamber lining concrete and preparation method thereof Download PDFInfo
- Publication number
- CN116425482A CN116425482A CN202310349242.0A CN202310349242A CN116425482A CN 116425482 A CN116425482 A CN 116425482A CN 202310349242 A CN202310349242 A CN 202310349242A CN 116425482 A CN116425482 A CN 116425482A
- Authority
- CN
- China
- Prior art keywords
- weight
- lining concrete
- agent
- parts
- gas storage
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 107
- 238000003860 storage Methods 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 58
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 52
- 238000005336 cracking Methods 0.000 claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000008139 complexing agent Substances 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 16
- 239000011707 mineral Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 22
- 239000012615 aggregate Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 229920005646 polycarboxylate Polymers 0.000 claims description 8
- 239000003223 protective agent Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- -1 polyoxymethylene Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920006324 polyoxymethylene Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000011814 protection agent Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 11
- 230000009471 action Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000006703 hydration reaction Methods 0.000 description 16
- 230000036571 hydration Effects 0.000 description 10
- 230000035699 permeability Effects 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000004574 high-performance concrete Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002986 polymer concrete Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00275—Materials impermeable to vapours or gases
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses lining concrete for an underground high-pressure gas storage chamber and a preparation method thereof, wherein the lining concrete comprises the following raw materials in parts by weight: aggregate: 230-280 parts by weight; and (3) cement: 65-80 parts by weight; fly ash: 10-20 parts by weight; mineral powder: 10-15 parts by weight; complexing agent: 0.5 to 0.8 weight portion; anti-cracking agent: 0.6 to 1.6 weight portions; and (3) an expanding agent: 6-8 parts by weight; and (3) fibers: 0.16 to 0.92 weight portion. The lining concrete of the underground high-pressure gas storage chamber prepared by the raw materials in parts by weight has the advantages of good compressive strength, fatigue resistance and load performance and excellent crack resistance, and the lining concrete has no penetrating crack under the circulating action of high temperature (100-200 ℃) and air pressure in the operation process of the underground gas storage. Meanwhile, the lining concrete has high air tightness, low manufacturing cost and convenient construction.
Description
Technical Field
The invention discloses lining concrete for an underground high-pressure gas storage chamber and a preparation method thereof, and belongs to the technical field of building materials.
Background
The compressed air energy storage technology is a large-scale energy storage technology with great potential, can powerfully support peak regulation requirements of a local power grid, promotes safe and stable operation of a power system, relieves the situation of power supply tension caused by peak-valley difference, and has wide application value in the fields of power production, transportation, consumption and the like.
Because of the large space required by energy storage, the large-scale compressed air energy storage power station generally adopts an underground gas storage. The hard rock stratum has the advantages of good rock mass, high strength, large deformation modulus and the like, and is used as a candidate stratum for the construction and research of the underground gas storage. Because the unavoidable joint cracks exist in the natural rock, the air tightness of the air storage can be greatly influenced, and the operation efficiency of the air storage is reduced, engineering measures are generally required to ensure the air tightness of the air storage cavity, such as a composite lining or hydraulic condition mode.
At present, the composite lining mainly adopts the schemes of steel, common concrete, flexible polymer concrete and the like, but has higher manufacturing cost, poorer economy and complex construction process, and the lining layer with hard brittleness is easy to crack due to the cyclically-changed pressure and temperature load, so that the sealing failure is caused.
Disclosure of Invention
The purpose of the application is to provide underground high-pressure gas storage cavity lining concrete and a preparation method thereof, so as to solve the technical problems of easy occurrence of cracks, high manufacturing cost and complex construction process in the composite lining formed by steel and common concrete in the prior art.
The invention provides lining concrete for an underground high-pressure gas storage cavity, which comprises the following raw materials in parts by weight:
aggregate: 230-280 parts by weight;
and (3) cement: 65-80 parts by weight;
fly ash: 10-20 parts by weight;
mineral powder: 10-15 parts by weight;
complexing agent: 0.5 to 0.8 weight portion;
anti-cracking agent: 0.6 to 1.6 weight portions;
and (3) an expanding agent: 6-8 parts by weight;
and (3) fibers: 0.16 to 0.92 weight portion.
Preferably, the aggregate comprises:
coarse aggregate: 120-150 parts by weight of coarse aggregate with the grain diameter of 5-10 mm;
fine aggregate: 110 to 130 weight portions, wherein the fineness modulus of the fine aggregate is more than or equal to 2.7.
Preferably, the complexing agent comprises a polycarboxylate water reducer, a rheology agent and a collapse protecting agent;
the dosage ratio of the polycarboxylate water reducer to the rheological agent to the collapse protecting agent is (18-24) (0.2-0.6) (1.9-4.5).
Preferably, the water-cement ratio of the lining concrete is 0.19-0.23.
Preferably, the expanding agent is an aluminosilicate expanding agent.
Preferably, the fibers include cylindrical fibers and flat fibers;
the length of the cylindrical fiber is 6-12 mm;
the length of the flat fiber is 18-24 mm.
Preferably, the ratio of the cylindrical fiber to the flat fiber is (1-2): 1.
The second aspect of the invention provides a method for preparing lining concrete of an underground high-pressure gas storage chamber, which comprises the following steps:
step 1, weighing a complexing agent and water according to parts by weight, and putting the complexing agent into the water and uniformly stirring to obtain a first mixture;
step 2, weighing aggregate, cement, fly ash, mineral powder, an anti-cracking agent, an expanding agent and fibers according to parts by weight, and putting the aggregate, the cement, the fly ash, the mineral powder, the anti-cracking agent, the expanding agent and the fibers into stirring equipment to uniformly stir to obtain a second mixture;
and 3, putting 70% by weight of the first mixture into the second mixture for first stirring, and then putting the rest 30% by weight of the first mixture into the mixture after first stirring for second stirring to obtain the underground high-pressure gas storage cavity lining concrete.
Preferably, the stirring time in the step 2 is 30 s-1 min.
Preferably, the stirring time of the first stirring in the step 3 is 1-2 min, and the stirring time of the second stirring is 2-4 min.
Compared with the prior art, the underground high-pressure gas storage chamber lining concrete and the preparation method thereof have the following beneficial effects:
(1) By adding the fine aggregate and the coarse aggregate with a certain grading, on one hand, the mechanical property of the concrete can be improved, the cement consumption can be reduced, and the hydration heat release cracking of the concrete can be reduced; on the other hand, the cost can be reduced, so that the device can be used on a large scale.
(2) The composite agent, the anti-cracking agent, the expanding agent and the fiber are used in combination according to the set weight parts, so that the cracking resistance of the lining concrete is improved. Specifically, the complexing agent ensures the workability and the expansion degree of the lining concrete of the gas storage, ensures the compactness and the uniformity of the concrete, adjusts the setting time of the concrete, and can properly reduce the water consumption to improve the mechanical property of the concrete; the anti-cracking agent can further reduce the hydration heat of cement, delay the hydration reaction time and avoid the cracking of the interior and the surface of the concrete caused by concentrated heat release of the hydration reaction; the expanding agent is a calcium sulfoaluminate-calcium oxide dual-expansion source composite high-performance concrete expanding agent, and takes part in the hydration reaction process in the concrete to generate certain limit expansion, so as to counteract the tensile stress of the concrete caused by shrinkage, prevent the concrete structure from cracking caused by overlarge shrinkage, and effectively improve the cracking resistance and the water resistance of the concrete; by doping the dispersed flat fibers and the dispersed cylindrical fibers with different lengths, the generation and development of cracks are inhibited in the concrete, and the mechanical property of the concrete is improved to a certain extent; the components are synergistic, complement each other and are inexhaustible, so that the lining concrete prepared by the method can be ensured to have no penetrating crack under the condition of cyclically-changing pressure and temperature load.
(3) The fiber used in the invention is two fibers with different specifications, shapes or types, so that the mechanical property, fatigue resistance and crack resistance of the gas storage lining concrete are improved, and the gas storage lining concrete works under the repeated action of cyclic heat and force in the compressed air energy storage operation process and keeps a good working state, namely, the gas storage lining concrete has excellent air tightness and crack resistance.
(4) The invention combines mineral powder, fly ash and cement, fully exerts the filling effect, refines the internal pore structure of the concrete, improves the compactness, strength and durability of the concrete, and reduces the air permeability coefficient of the concrete.
Detailed Description
In the following, the technical solutions in the embodiments of the present application are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein fall within the scope of the protection of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In addition, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
The first aspect of the embodiment of the invention provides an underground high-pressure gas storage chamber lining concrete, which comprises the following raw materials in parts by weight:
aggregate: 230-280 parts by weight; and (3) cement: 65-80 parts by weight; fly ash: 10-20 parts by weight; mineral powder: 10-15 parts by weight; complexing agent: 0.5 to 0.8 weight portion; anti-cracking agent: 0.6 to 1.6 weight portions; and (3) an expanding agent: 6-8 parts by weight; and (3) fibers: 0.16 to 0.92 weight portion.
In the embodiment of the invention, the water-cement ratio of the lining concrete is 0.19-0.23, so that the water used in the raw materials in parts by weight is 19-23 parts.
The lining concrete of the underground high-pressure gas storage chamber prepared by the raw materials in parts by weight has the advantages of good compressive strength, good fatigue load resistance and excellent crack resistance, and no penetrating crack is generated under the circulating action of high temperature (100-200 ℃) and air pressure when the lining concrete meets the running process of the underground gas storage. Meanwhile, the lining concrete of the invention uses fly ash, mineral powder, complexing agent, anti-cracking agent, expanding agent and fiber in combination, so that the internal structure of the concrete is reasonable and compact, thereby improving the air tightness of the lining concrete and leading the air permeability coefficient K of the lining concrete to be less than 1.4 multiplied by 10 -12 cm/s, and ensuring that the air leakage amount of the air storage cavity is less than 0.5% every day in the operation process of the compressed air energy storage power station. Compared with steel lining, the lining concrete has relatively low cost, is convenient to construct, and improves the construction efficiency while reducing the cost.
Further, the aggregate in the embodiment of the invention comprises coarse aggregate: 120-150 parts by weight of fine aggregate: 110 to 130 weight portions. Wherein the coarse aggregate is beige stone, rock with lower porosity such as granite or amphibole is selected, and the whole grain diameter range of the coarse aggregate is 5-10 mm; the fineness modulus of the fine aggregate is not less than 2.7, the lithology is the same as that of the coarse aggregate, and the mud content of the natural sand is not more than 1%.
The reason why the fine aggregate with the fineness modulus not smaller than 2.7 is used in the embodiment of the invention is that if the fine powder is too much, the shrinkage of the concrete is increased, and the concrete is easy to crack; meanwhile, the mud content of the natural sand is not more than 1 percent mainly because the mud content of the natural sand is large, the water demand of the concrete is large, the plasticity is poor, the shrinkage is increased, the strength of the concrete is reduced, and the structure is easy to crack.
According to the embodiment of the invention, the fine aggregate and the coarse aggregate with a certain grading are mixed, so that on one hand, the mechanical property of the concrete is improved, the cement consumption is reduced, and the hydration heat release cracking of the concrete is reduced; on the other hand, the cost is reduced, and the method can be used on a large scale.
The P.O 52.5.5 cement has the advantages of quick setting and hardening, high early strength and later strength, good freezing resistance, good carbonization resistance, small drying shrinkage and the like, and the cement used in the embodiment of the invention is P.O52.5 cement.
Further, the fly ash in the embodiment of the invention is first-grade fly ash, and the water demand is less compared with that of second-grade fly ash and third-grade fly ash, so that the material consumption is saved under the condition of unchanged water-cement ratio.
The mineral powder used as the admixture for concrete can improve or enhance the comprehensive performance of the concrete, and has the action mechanism that the mineral powder has a micro aggregate effect, a microcrystalline core effect and a pozzolanic effect in the concrete, and can also enhance the impermeability of the concrete, reduce the hydration heat and prevent temperature cracks.
The invention combines mineral powder, fly ash and cement, fully exerts the filling effect, refines the internal pore structure of the concrete, improves the compactness, strength and durability of the concrete, and reduces the air permeability coefficient of the concrete.
In order to ensure the workability of concrete, control the expansion degree of the concrete and improve the compactness of the concrete, the complexing agent used in the embodiment of the invention comprises external additives such as a polycarboxylate water reducer, a rheological agent, a collapse-protecting agent and the like; the using amount ratio of the polycarboxylate water reducer, the rheological agent and the collapse protecting agent is as follows: (18-24): 0.2-0.6): 1.9-4.5.
The polycarboxylate water reducer in the embodiment of the invention has the functions of dispersing cement particles, releasing wrapped water molecules to enable the water molecules to participate in flowing, effectively reducing resistance among the cement particles, changing the rheological process of concrete and ensuring the mixing uniformity of various raw materials.
The rheological agent in the embodiment of the invention has the function of increasing bridging between the cement and the aggregate, so that the cement mortar has proper thixotropic property, and the aggregate is driven to flow together when the mortar flows, thereby avoiding concrete segregation.
The collapse-protecting agent in the embodiment of the invention has the function of delaying the hydration and the coagulation of cement and achieving the function of maintaining the slump of concrete.
Therefore, the collapse-protecting agent used by the invention can delay the hydration and coagulation of cement, thereby providing enough time for mixing and bridging of various raw materials under the action of the polycarboxylate water reducer and the rheological agent and improving the comprehensive properties of workability, compactness and the like of the prepared lining concrete.
The main components of the anti-cracking agent in the embodiment of the invention are hydroxy acid ester, fine mineral powder and the like, and the anti-cracking agent has the functions of delaying the hydration reaction time of the concrete, reducing the hydration heat release amount, reducing the shrinkage cracking of the inside and the surface of the concrete, promoting the hydration of the middle and later stages of the cement to a certain extent and improving the mechanical properties of the middle and later stages of the concrete.
The expanding agent used in the embodiment of the invention is an aluminosilicate expanding agent, and the expanding agent can ensure that the concrete has certain expansion performance in the setting and hardening process, and can avoid shrinkage cracking and surface cracking caused by water evaporation. Specifically, in the embodiment of the invention, the expanding agent is a calcium sulfoaluminate-calcium oxide dual-expansion-source composite high-performance concrete expanding agent, and takes part in the hydration reaction process in the concrete to generate certain limiting expansion, so as to counteract the tensile stress of the concrete caused by shrinkage, prevent the cracking of the concrete structure caused by overlarge shrinkage, and effectively improve the cracking resistance and the water resistance of the concrete.
The fibers in the raw materials include cylindrical fibers and flat fibers; wherein the length of the cylindrical fiber is 6-12 mm; the length of the flat fiber is 18-24 mm, and the ratio of the cylindrical fiber to the flat fiber is (1-2): 1. The fiber used in the embodiment of the invention is one or two of polyoxymethylene fiber (POM), polyvinyl alcohol fiber (PVA) and polypropylene fiber (PP), and is a cylindrical or flat dispersion fiber. The dispersing type fiber is clear in root, can be rapidly and uniformly dispersed in concrete, fully plays the bridging effect of the fiber, and can not generate the phenomena of stirring, agglomeration and the like, so that on one hand, the shrinkage cracking of the inside and the surface of the concrete can be avoided, and on the other hand, the fatigue resistance of the concrete is improved, and the brittle failure is avoided. The length of the cylindrical fiber is 6-12 mm, and the length of the flat fiber is 18-24 mm. The short fibers mainly have the functions of improving the tensile strength, the compressive strength and the fatigue resistance of the concrete, and the long fibers have the function of preventing shrinkage cracking of the inside and the surface of the concrete.
According to the invention, the composite agent, the anti-cracking agent, the expanding agent and the fiber are used in combination according to the set weight parts, so that the cracking resistance of the lining concrete is improved. Specifically, the complexing agent ensures the workability and the expansion degree of the lining concrete of the gas storage, adjusts the hydration reaction time, and avoids the phenomena of concrete cracking and the like caused by heat release of cement hydration concentrated reaction; the anti-cracking agent can further reduce the hydration heat of cement to avoid concrete cracking caused by heat release; the expanding agent can ensure that the concrete has certain expansion performance in the process of setting and hardening, and avoids shrinkage cracking and surface cracking caused by water evaporation; the fiber inhibits the crack from generating and expanding, and the components are synergistic and complementary, so that the fiber is indispensable.
The second aspect of the invention provides a method for preparing lining concrete of an underground high-pressure gas storage chamber, which comprises the following steps:
step 1, weighing a complexing agent and water according to parts by weight, and putting the complexing agent into water and uniformly stirring to obtain a first mixture; according to the embodiment of the invention, the water and the complexing agent are uniformly stirred, so that the effect of the complexing agent is fully exerted, and the stirring time of the concrete mixture is shortened.
Step 2, weighing aggregate, cement, fly ash, mineral powder, an anti-cracking agent, an expanding agent and fibers according to parts by weight, putting into stirring equipment, and stirring for 30 s-1 min until the aggregate, the cement, the fly ash, the mineral powder, the anti-cracking agent, the expanding agent and the fibers are uniformly mixed to obtain a second mixture;
step 3, putting 70% of the first mixture into the second mixture for first stirring, wherein the stirring time of the first stirring is 1-2 min until the first stirring is uniform; and then adding the rest 30 weight percent of the first mixture into the mixture after the first stirring, and stirring for the second time for 2-4 min to obtain the underground high-pressure gas storage chamber lining concrete. The embodiment of the invention adopts a mode of batch charging and stirring, the first stirring aims at fully and uniformly mixing raw materials, various additives obtain sufficient acting time, thus obtaining an initial concrete mixture with uniform performance, and the second charging and stirring aims at changing the state of the initial concrete mixture in a short time, thereby being beneficial to controlling the workability of concrete, improving the compactness of the concrete and shortening the stirring time.
The present invention will be described in more specific examples.
Table 1 shows the proportions (parts by weight) of the raw materials used in 4 examples of the present invention, wherein the fibers used in the 4 examples were cylindrical fibers having a length of 8mm and flat fibers having a length of 20 mm.
TABLE 1 raw materials proportioning and dosage
Examples were subjected to compressive strength test, axial tensile test, permeation resistance test, and air permeability coefficient test.
Compressive strength test, axial tensile test and impermeability test were carried out according to the procedure of hydraulic concrete test DL/T5150-2017, and the impermeability grade was set to W12. The air tightness of the concrete material is characterized by an air permeability coefficient, the air permeability coefficient is tested according to the lower air inlet method in the technical Specification of railway gas tunnels TB 10120-2019, the air pressure is controlled at 0.6MPa, and the obtained results are shown in Table 2.
Table 2 test results
As is clear from examples 1 to 4, the 28d compressive strength of the high-pressure air storage chamber concrete within the raw material dosage range reaches 58 to 63MPa, and the air permeability coefficient reaches 1.35 multiplied by 10 -12 The 28d tensile strength is 5.4-6.9 MPa below cm/s, and the W12 impervious grade is achieved.
The four embodiments all meet the technical indexes of the lining concrete of the high-pressure gas storage chamber: the water-gel ratio is 0.19-0.23, the expansion degree of the mixture is more than 550mm, the 28d compressive strength is 40-65 MPa, the 28d tensile strength is 5-7 MPa, the impervious grade is not lower than W12, and the 28d air permeability coefficient K is less than 1.4 multiplied by 10 -12 cm/s。
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (10)
1. The lining concrete for the underground high-pressure gas storage chamber is characterized by comprising the following raw materials in parts by weight:
aggregate: 230-280 parts by weight;
and (3) cement: 65-80 parts by weight;
fly ash: 10-20 parts by weight;
mineral powder: 10-15 parts by weight;
complexing agent: 0.5 to 0.8 weight portion;
anti-cracking agent: 0.6 to 1.6 weight portions;
and (3) an expanding agent: 6-8 parts by weight;
and (3) fibers: 0.16 to 0.92 weight portion.
2. The underground high pressure gas storage cavern lining concrete of claim 1, wherein the aggregate comprises:
coarse aggregate: 120-150 parts by weight of coarse aggregate with the grain diameter of 5-10 mm;
fine aggregate: 110 to 130 weight portions, wherein the fineness modulus of the fine aggregate is more than or equal to 2.7.
3. The underground high pressure gas storage cavern lining concrete of claim 1, wherein the complexing agent comprises a polycarboxylate water reducer, a rheological agent, and a collapse protection agent;
the dosage ratio of the polycarboxylate water reducer to the rheological agent to the collapse protecting agent is (18-24) (0.2-0.6) (1.9-4.5).
4. The underground high-pressure gas storage cavern lining concrete of claim 1, wherein the expansion agent is a sulfoaluminate expansion agent;
the water-cement ratio of the lining concrete is 0.19-0.23.
5. The underground high pressure gas storage cavern lining concrete of claim 1, wherein the fibers comprise cylindrical fibers and flat fibers;
the length of the cylindrical fiber is 6-12 mm;
the length of the flat fiber is 18-24 mm.
6. The lining concrete for an underground high-pressure gas storage chamber according to claim 5, wherein the ratio of the cylindrical fiber to the flat fiber is (1-2): 1.
7. The underground high pressure gas storage cavern lining concrete of claim 1 or 5, wherein the fibers are one or two of polyoxymethylene fibers, polyvinyl alcohol fibers, and polypropylene fibers.
8. The preparation method of the lining concrete of the underground high-pressure gas storage chamber is characterized by comprising the following steps of:
step 1, weighing a complexing agent and water according to parts by weight, and putting the complexing agent into the water and uniformly stirring to obtain a first mixture;
step 2, weighing aggregate, cement, fly ash, mineral powder, an anti-cracking agent, an expanding agent and fibers according to parts by weight, and putting the aggregate, the cement, the fly ash, the mineral powder, the anti-cracking agent, the expanding agent and the fibers into stirring equipment to uniformly stir to obtain a second mixture;
and 3, putting 70% by weight of the first mixture into the second mixture for first stirring, and then putting the rest 30% by weight of the first mixture into the mixture after first stirring for second stirring to obtain the underground high-pressure gas storage cavity lining concrete.
9. The method for preparing lining concrete of an underground high-pressure gas storage chamber according to claim 8, wherein the stirring time in the step 2 is 30 s-1 min.
10. The method for preparing lining concrete of an underground high-pressure gas storage chamber according to claim 8, wherein the stirring time of the first stirring in the step 3 is 1-2 min, and the stirring time of the second stirring is 2-4 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310349242.0A CN116425482A (en) | 2023-04-04 | 2023-04-04 | Underground high-pressure gas storage chamber lining concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310349242.0A CN116425482A (en) | 2023-04-04 | 2023-04-04 | Underground high-pressure gas storage chamber lining concrete and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116425482A true CN116425482A (en) | 2023-07-14 |
Family
ID=87082676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310349242.0A Pending CN116425482A (en) | 2023-04-04 | 2023-04-04 | Underground high-pressure gas storage chamber lining concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116425482A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117086A1 (en) * | 2000-12-19 | 2002-08-29 | Caijun Shi | Low shrinkage, high strength cellular lightweight concrete |
| JP2003192421A (en) * | 2001-12-21 | 2003-07-09 | Kajima Corp | Stain hardening type cement based composite material having self-compacting property and low shrinkability |
| CN105601199A (en) * | 2015-12-25 | 2016-05-25 | 邢台建工商品混凝土有限公司 | Expansive anti-crack fiber concrete and preparation method therefor |
| CN110627449A (en) * | 2019-10-23 | 2019-12-31 | 冀东水泥重庆混凝土有限公司 | C60 expansion self-compaction high-strength concrete and preparation method thereof |
| CN112266218A (en) * | 2020-11-06 | 2021-01-26 | 北京众和聚源混凝土有限公司 | High-strength concrete and preparation method thereof |
| CN113185216A (en) * | 2021-04-20 | 2021-07-30 | 中国一冶集团有限公司 | High-impermeability self-compacting concrete and preparation method thereof |
-
2023
- 2023-04-04 CN CN202310349242.0A patent/CN116425482A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117086A1 (en) * | 2000-12-19 | 2002-08-29 | Caijun Shi | Low shrinkage, high strength cellular lightweight concrete |
| JP2003192421A (en) * | 2001-12-21 | 2003-07-09 | Kajima Corp | Stain hardening type cement based composite material having self-compacting property and low shrinkability |
| CN105601199A (en) * | 2015-12-25 | 2016-05-25 | 邢台建工商品混凝土有限公司 | Expansive anti-crack fiber concrete and preparation method therefor |
| CN110627449A (en) * | 2019-10-23 | 2019-12-31 | 冀东水泥重庆混凝土有限公司 | C60 expansion self-compaction high-strength concrete and preparation method thereof |
| CN112266218A (en) * | 2020-11-06 | 2021-01-26 | 北京众和聚源混凝土有限公司 | High-strength concrete and preparation method thereof |
| CN113185216A (en) * | 2021-04-20 | 2021-07-30 | 中国一冶集团有限公司 | High-impermeability self-compacting concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴昊宇;吴培红;卞立波;陶志;: "纤维珠链在混凝土抗裂性能设计中的应用研究", 材料导报, no. 1, 25 May 2020 (2020-05-25) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110790552B (en) | Waste brick regenerated ultrahigh-toughness mixture and preparation method and application thereof | |
| CN102745964B (en) | Grouting material | |
| CN109354463B (en) | Anti-seepage and anti-freezing C30 concrete and preparation method thereof | |
| CN101723632A (en) | Process for preparing load-bearing foam concrete blocks | |
| CN108793869B (en) | High-strength superfine ordinary silica cement-based self-leveling mortar and preparation method thereof | |
| CN107572941B (en) | Grouting material special for micro-expansion assembly type construction steel bar connecting sleeve and preparation method thereof | |
| CN110451860A (en) | A kind of energy-saving high-temperature-resistant concrete and preparation method thereof | |
| CN111499294A (en) | Ultrahigh-performance concrete dry powder and preparation method thereof | |
| CN111848019A (en) | Ultrahigh-lift pumping anti-cracking concrete suitable for cable tower structure and preparation method thereof | |
| CN103467037B (en) | A kind of reactive powder cement-base composite material and preparation method thereof | |
| CN115819049A (en) | Cement-based grouting material for mounting wind power foundation tower barrel base and preparation method thereof | |
| CN112321237A (en) | Solid waste fly ash high-strength foam concrete and preparation method thereof | |
| CN110078431A (en) | Anti- isolation high-strength heat-insulating concrete of one kind and preparation method thereof | |
| CN102910884B (en) | Concrete composition and preparation method thereof | |
| CN113045273A (en) | High-strength polyvinyl alcohol fiber reinforced cement-based composite material and preparation method and application thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| CN114751694A (en) | Cement grouting material suitable for marine environment and preparation method thereof | |
| CN101168483B (en) | High-performance panel concrete and preparation method thereof | |
| CN107902967B (en) | Anti-crack, adhesive and heat-insulating mortar dry material for yellow river silt construction and preparation method thereof | |
| CN110451840B (en) | Composite type compacting agent | |
| CN102718443B (en) | Ceramsite dual-doped shotcrete for high-temperature tunnel rock surfaces | |
| CN116425482A (en) | Underground high-pressure gas storage chamber lining concrete and preparation method thereof | |
| CN116283168A (en) | Self-stress desert sand ultra-high ductility concrete and preparation method thereof | |
| CN110845188A (en) | Sand-free macroporous concrete and preparation method thereof | |
| CN111362636A (en) | C60 carbon fiber concrete 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 |