CN113121195B - Slurry for thixotropic slurry replacement in pipe jacking construction - Google Patents
Slurry for thixotropic slurry replacement in pipe jacking construction Download PDFInfo
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- CN113121195B CN113121195B CN202110447519.4A CN202110447519A CN113121195B CN 113121195 B CN113121195 B CN 113121195B CN 202110447519 A CN202110447519 A CN 202110447519A CN 113121195 B CN113121195 B CN 113121195B
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- 239000002002 slurry Substances 0.000 title claims abstract description 93
- 230000009974 thixotropic effect Effects 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims abstract description 39
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical class [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 37
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 37
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 37
- HGPXWXLYXNVULB-UHFFFAOYSA-M lithium stearate Chemical compound [Li+].CCCCCCCCCCCCCCCCCC([O-])=O HGPXWXLYXNVULB-UHFFFAOYSA-M 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 29
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical compound OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 claims abstract description 27
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 claims abstract description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000011398 Portland cement Substances 0.000 claims abstract description 25
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 32
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 30
- 238000000227 grinding Methods 0.000 claims description 21
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 15
- 235000019864 coconut oil Nutrition 0.000 claims description 15
- 239000003240 coconut oil Substances 0.000 claims description 15
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 15
- 239000000194 fatty acid Substances 0.000 claims description 15
- 229930195729 fatty acid Natural products 0.000 claims description 15
- 150000004665 fatty acids Chemical class 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000012188 paraffin wax Substances 0.000 claims description 15
- 238000013329 compounding Methods 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 3
- 239000000661 sodium alginate Substances 0.000 claims description 3
- 235000010413 sodium alginate Nutrition 0.000 claims description 3
- 229940005550 sodium alginate Drugs 0.000 claims description 3
- 239000001509 sodium citrate Substances 0.000 claims description 3
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- 239000000176 sodium gluconate Substances 0.000 claims description 3
- 229940005574 sodium gluconate Drugs 0.000 claims description 3
- 235000012207 sodium gluconate Nutrition 0.000 claims description 3
- 239000001433 sodium tartrate Substances 0.000 claims description 3
- 229960002167 sodium tartrate Drugs 0.000 claims description 3
- 235000011004 sodium tartrates Nutrition 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229960001790 sodium citrate Drugs 0.000 claims description 2
- 235000011083 sodium citrates Nutrition 0.000 claims description 2
- 229940083575 sodium dodecyl sulfate Drugs 0.000 claims description 2
- 229960004025 sodium salicylate Drugs 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 238000011049 filling Methods 0.000 abstract description 5
- 230000008093 supporting effect Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000000440 bentonite Substances 0.000 description 6
- 229910000278 bentonite Inorganic materials 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical class [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/08—Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
- C04B24/085—Higher fatty acids
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/00008—Obtaining or using nanotechnology related 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of infrastructure engineering materials, in particular to slurry for thixotropic slurry replacement in pipe jacking construction, which solves the problems of difficult settlement control and poor filling support property of the existing thixotropic slurry in the pipe jacking construction process in the prior art, and comprises the following raw materials: 150-250 parts of Portland cement, 100-200 parts of quartz sand, 50-100 parts of modified calcium carbonate, 40-80 parts of nano calcium hydroxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder and 500 parts of water 300. The prepared slurry has high strength, good dispersibility, good stability and good corrosion resistance, can well regulate and control the pressure between the pipe joint and the peripheral soil body, and fills the gap between the pipe joint structure and the peripheral soil body, thereby playing an effective filling and supporting role and avoiding formation disturbance and settlement deformation.
Description
Technical Field
The invention relates to the technical field of infrastructure engineering materials, in particular to slurry for thixotropic slurry replacement in pipe jacking construction.
Background
Along with the development of economy in China, the pace of urban life is faster and faster, excavation construction in cities and towns is more and more restricted, and then a trenchless construction technology is widely applied, and the pipe jacking construction technology is mature day by day. The pipe jacking method is a subsurface excavation type construction method adopted when a tunnel or an underground pipeline passes through various barriers such as railways, roads, rivers or buildings. During pipe jacking construction, a member is required to timely inject thixotropic slurry into gaps on the periphery of a pipeline during excavation of a cutter head of a pipe jacking machine, and after jacking is finished, consolidation of the thixotropic slurry is enhanced so as to protect ground buildings under shallow earth.
As one of the most critical technologies of pipe jacking construction, the thixotropic slurry grouting drag reduction technology plays a vital role in the jacking construction process. The thixotropic slurry is: mixing bentonite and water in a certain proportion, and adding corresponding additives. After external disturbance such as stirring, pumping, flowing and the like, the slurry can be changed into a flow state from a gel, and can be changed into a gel (the bentonite particles are in a flocculation state) from a flow state (the bentonite particles are in a dispersion state) after standing. This property of alternating flow and gel may occur many times is known as thixotropy. The function of the method has two aspects: firstly, the lubricating effect is achieved, in the jacking construction process, the bentonite particles are disturbed by external factors such as pumping, flowing and the like, and the slurry lubricates the friction effect between the pipe joint structure and the soil body in a flow state form, so that the propelling resistance is reduced; and secondly, the slurry has a filling and supporting effect, and becomes gel after standing, so that the gap between the supporting pipe joint structure and the peripheral soil body can be effectively filled, the disturbance and the settlement deformation of the stratum are reduced, and the safety and the controllability of the surrounding environment are ensured. If the content of the bentonite in the thixotropic slurry for pipe jacking construction is enough, the electric bonds among the particles form a mechanical structure of a dispersion system, and once the electric bonds among the particles are broken by touching (shaking, stirring, vibrating or passing ultrasonic waves and current), the bentonite aqueous solution is changed into a fluid state. If the action of the external factor is stopped, the aqueous solution becomes solid again. Therefore, after the jacking of the jacking pipe is finished, the thixotropic slurry must be replaced in time to reduce the settlement generated when the jacking pipe passes through the existing structure in the later period. Based on the statement, the invention provides slurry for thixotropic slurry replacement in pipe jacking construction.
Disclosure of Invention
The invention aims to solve the problems that the sedimentation control is difficult in the pipe jacking construction process and the filling support property of the existing thixotropic slurry is poor in the prior art, and provides the slurry for the replacement of the thixotropic slurry in the pipe jacking construction.
A slurry for replacement of thixotropic slurry in pipe jacking construction comprises the following raw materials in parts by weight: 150-250 parts of Portland cement, 100-200 parts of quartz sand, 50-100 parts of modified calcium carbonate, 40-80 parts of nano calcium hydroxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder and 500 parts of water 300.
Preferably, the slurry for pipe jacking construction thixotropic slurry replacement comprises the following raw materials in parts by weight: 220 parts of Portland cement 180-charge materials, 180 parts of quartz sand 120-charge materials, 60-90 parts of modified calcium carbonate, 42.5-76 parts of nano calcium hydroxide, 8.5-9.5 parts of lithium stearate, 1.5-2.5 parts of sodium dimethyldithiocarbamate, 1.5-2.5 parts of sodium metasilicate pentahydrate, 3-4 parts of retarder and 450 parts of water 350-charge materials.
Preferably, the slurry for thixotropic slurry replacement in pipe jacking construction comprises the following raw materials in parts by weight: 200 parts of portland cement, 150 parts of quartz sand, 75 parts of modified calcium carbonate, 63 parts of nano calcium hydroxide, 9 parts of lithium stearate, 2 parts of sodium dimethyldithiocarbamate, 2 parts of sodium metasilicate pentahydrate, 3.5 parts of retarder and 400 parts of water.
Preferably, the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide in a mass ratio of 28-40:3-8:1-5: 1-3.
Preferably, the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 40-60 deg.C, grinding and mixing for 20-30min, adding nano iron oxide, grinding and mixing well to obtain the final product.
Preferably, the mass ratio of the nano calcium hydroxide to the lithium stearate is 5-8: 1.
Preferably, the retarder is one or more of sodium tartrate, sodium gluconate, sodium citrate, sodium salicylate, sodium alginate, sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 150-fold silica gel, 200-fold silica sand, 50-100 parts of modified calcium carbonate, 40-80 parts of nano calcium hydroxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder and 500 parts of water 300-fold silica gel for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and retarder, and uniformly stirring and mixing to obtain the slurry replaced by the required thixotropic slurry.
The slurry for thixotropic slurry replacement in pipe jacking construction provided by the invention has the following beneficial effects:
1. the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate are mixed firstly to obtain dry mixed material; adding water into the dry mixture, stirring, then sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and retarder, and uniformly stirring and mixing to obtain slurry replaced by the required thixotropic slurry; the prepared slurry has high strength, good dispersibility, good stability and good corrosion resistance, can well regulate and control the pressure between the pipe joint and the peripheral soil body, and fills the gap between the pipe joint structure and the peripheral soil body, thereby playing an effective filling and supporting role and avoiding formation disturbance and settlement deformation.
2. The calcium carbonate, the microcrystalline paraffin, the coconut oil fatty acid diethanolamide and the nano iron oxide are jointly ground to prepare the modified calcium carbonate, and the strength and the corrosion resistance of the slurry can be obviously improved by adding the modified calcium carbonate.
3. According to the invention, the nano calcium hydroxide and the lithium stearate are compounded and added into the slurry, and the compounding of the nano calcium hydroxide and the lithium stearate can obviously shorten the dispersing and mixing time among the raw materials, improve the dispersing and mixing effect, so that the obtained slurry can quickly reach the construction performance, and in addition, the compounding of the nano calcium hydroxide and the lithium stearate can also effectively improve the corrosion resistance of the slurry, effectively prevent harmful substances in a peripheral soil layer from corroding pipe joints, and further prolong the service life of the pipe joints.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The invention provides a slurry for pipe jacking construction thixotropic slurry replacement, which comprises the following raw materials in parts by weight: 150 parts of portland cement, 100 parts of quartz sand, 50 parts of modified calcium carbonate, 40 parts of nano calcium hydroxide, 8 parts of lithium stearate, 1 part of sodium dimethyldithiocarbamate, 1 part of sodium metasilicate pentahydrate, 2 parts of retarder and 300 parts of water; the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide in a mass ratio of 28:3:1: 1; the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 40 ℃, grinding and mixing for 20min, adding nano iron oxide, grinding and mixing uniformly to obtain the product; the mass ratio of the nano calcium hydroxide to the lithium stearate is 5: 1; the retarder is sodium tartrate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 150 parts of portland cement, 100 parts of quartz sand, 50 parts of modified calcium carbonate, 40 parts of nano calcium hydroxide, 8 parts of lithium stearate, 1 part of sodium dimethyldithiocarbamate, 1 part of sodium metasilicate pentahydrate, 2 parts of retarder and 300 parts of water for later use;
s2, adding the raw materials of the modified calcium carbonate, the portland cement, the nano calcium hydroxide and the lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and a retarder, and stirring and mixing uniformly to obtain the slurry replaced by the required thixotropic slurry.
Example two
The invention provides slurry for thixotropic slurry replacement in pipe jacking construction, which comprises the following raw materials in parts by weight: 180 parts of Portland cement, 120 parts of quartz sand, 60 parts of modified calcium carbonate, 42.5 parts of nano calcium hydroxide, 8.5 parts of lithium stearate, 1.5 parts of sodium dimethyldithiocarbamate, 1.5 parts of sodium metasilicate pentahydrate, 3 parts of retarder and 350 parts of water; the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide according to the mass ratio of 28:5:3: 1; the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 45 ℃, grinding and mixing for 22min, adding nano iron oxide, grinding and mixing uniformly to obtain the product; the mass ratio of the nano calcium hydroxide to the lithium stearate is 6: 1; the retarder is sodium gluconate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 180 parts of Portland cement, 120 parts of quartz sand, 60 parts of modified calcium carbonate, 42.5 parts of nano calcium hydroxide, 8.5 parts of lithium stearate, 1.5 parts of sodium dimethyldithiocarbamate, 1.5 parts of sodium metasilicate pentahydrate, 3 parts of retarder and 350 parts of water for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and a retarder, and stirring and mixing uniformly to obtain the slurry replaced by the required thixotropic slurry.
EXAMPLE III
The invention provides a slurry for pipe jacking construction thixotropic slurry replacement, which comprises the following raw materials in parts by weight: 200 parts of portland cement, 150 parts of quartz sand, 75 parts of modified calcium carbonate, 63 parts of nano calcium hydroxide, 9 parts of lithium stearate, 2 parts of sodium dimethyldithiocarbamate, 2 parts of sodium metasilicate pentahydrate, 3.5 parts of retarder and 400 parts of water; the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide according to the mass ratio of 34:5:3: 2; the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 50 ℃, grinding and mixing for 25min, adding nano iron oxide, grinding and mixing uniformly to obtain the product; the mass ratio of the nano calcium hydroxide to the lithium stearate is 6.5: 1; the retarder is sodium citrate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 200 parts of portland cement, 150 parts of quartz sand, 75 parts of modified calcium carbonate, 63 parts of nano calcium hydroxide, 9 parts of lithium stearate, 2 parts of sodium dimethyldithiocarbamate, 2 parts of sodium metasilicate pentahydrate, 3.5 parts of retarder and 400 parts of water for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and retarder, and uniformly stirring and mixing to obtain the slurry replaced by the required thixotropic slurry.
Example four
The invention provides a slurry for pipe jacking construction thixotropic slurry replacement, which comprises the following raw materials in parts by weight: 220 parts of portland cement, 180 parts of quartz sand, 90 parts of modified calcium carbonate, 76 parts of nano calcium hydroxide, 9.5 parts of lithium stearate, 2.5 parts of sodium dimethyldithiocarbamate, 2.5 parts of sodium metasilicate pentahydrate, 4 parts of retarder and 450 parts of water; the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide according to the mass ratio of 36:7:1: 3; the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 55 ℃, grinding and mixing for 28min, adding nano iron oxide, grinding and mixing uniformly to obtain the product; the mass ratio of the nano calcium hydroxide to the lithium stearate is 7: 1; the retarder is sodium alginate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 220 parts of portland cement, 180 parts of quartz sand, 90 parts of modified calcium carbonate, 76 parts of nano calcium hydroxide, 9.5 parts of lithium stearate, 2.5 parts of sodium dimethyldithiocarbamate, 2.5 parts of sodium metasilicate pentahydrate, 4 parts of retarder and 450 parts of water for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and retarder, and uniformly stirring and mixing to obtain the slurry replaced by the required thixotropic slurry.
EXAMPLE five
The invention provides slurry for thixotropic slurry replacement in pipe jacking construction, which comprises the following raw materials in parts by weight: 250 parts of portland cement, 200 parts of quartz sand, 100 parts of modified calcium carbonate, 80 parts of nano calcium hydroxide, 10 parts of lithium stearate, 3 parts of sodium dimethyldithiocarbamate, 3 parts of sodium metasilicate pentahydrate, 5 parts of retarder and 500 parts of water; the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide according to the mass ratio of 40:8:5: 3; the modified calcium carbonate is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 60 ℃, grinding and mixing for 30min, adding nano iron oxide, grinding and mixing uniformly to obtain the product; the mass ratio of the nano calcium hydroxide to the lithium stearate is 8: 1; the retarder is sodium dodecyl benzene sulfonate.
The invention also provides a preparation method of the slurry for the thixotropic slurry replacement in pipe jacking construction, which comprises the following steps:
s1, weighing 250 parts of portland cement, 200 parts of quartz sand, 100 parts of modified calcium carbonate, 80 parts of nano calcium hydroxide, 10 parts of lithium stearate, 3 parts of sodium dimethyldithiocarbamate, 3 parts of sodium metasilicate pentahydrate, 5 parts of retarder and 500 parts of water for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and a retarder, and stirring and mixing uniformly to obtain the slurry replaced by the required thixotropic slurry.
The slurry replaced by the thixotropic slurry prepared in the first to fifth embodiments of the present invention is respectively used for performance detection, and the following results are obtained:
| example one | Example two | EXAMPLE III | Example four | EXAMPLE five | |
| Adhesive strength/MPa | 0.78 | 0.81 | 0.88 | 0.85 | 0.82 |
| Compressive strength/MPa | 73.1 | 73.4 | 74.5 | 73.7 | 72.6 |
| Corrosion resistance/%) | 3.55 | 3.48 | 3.20 | 3.45 | 3.63 |
| Hydrolysis resistance/%) | 1.74 | 1.70 | 1.62 | 1.69 | 1.77 |
| Shrinkage ratio/% | 0.068 | 0.063 | 0.055 | 0.060 | 0.064 |
Note: the corrosion resistance refers to that after the slurry replaced by the thixotropic slurry in the embodiment of the invention is prepared into a workpiece of 100mm by 50mm, the workpiece is soaked in a saturated NaOH solution for 100 hours, and the reduction rate of the compressive strength of the workpiece is detected;
the hydrolysis resistance refers to that the slurry replaced by the thixotropic slurry in the embodiment of the invention is made into a workpiece of 100mm by 50mm, the workpiece is placed in warm water at 35 ℃, and after the workpiece is soaked for 100 hours in a heat preservation way, the reduction rate of the compressive strength of the workpiece is detected.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The slurry for replacement of thixotropic slurry in pipe jacking construction is characterized by comprising the following raw materials in parts by weight: 150-250 parts of Portland cement, 100-200 parts of quartz sand, 50-100 parts of modified calcium carbonate, 40-80 parts of nano calcium hydroxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder and 500 parts of water 300, wherein the modified calcium carbonate is prepared by compounding calcium carbonate, microcrystalline paraffin, nano iron oxide and coconut oil fatty acid diethanolamide in a mass ratio of 28-40:3-8:1-5:1-3, and is prepared by the following method: adding calcium carbonate and microcrystalline paraffin into a grinder, grinding while adding coconut oil fatty acid diethanolamide at 40-60 deg.C, grinding and mixing for 20-30min, adding nano iron oxide, grinding and mixing well to obtain the final product.
2. The slurry for pipe jacking construction thixotropic slurry replacement according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 220 parts of Portland cement 180-charge materials, 180 parts of quartz sand 120-charge materials, 60-90 parts of modified calcium carbonate, 42.5-76 parts of nano calcium hydroxide, 8.5-9.5 parts of lithium stearate, 1.5-2.5 parts of sodium dimethyldithiocarbamate, 1.5-2.5 parts of sodium metasilicate pentahydrate, 3-4 parts of retarder and 450 parts of water 350-charge materials.
3. The slurry for pipe jacking construction thixotropic slurry replacement according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 200 parts of portland cement, 150 parts of quartz sand, 75 parts of modified calcium carbonate, 63 parts of nano calcium hydroxide, 9 parts of lithium stearate, 2 parts of sodium dimethyldithiocarbamate, 2 parts of sodium metasilicate pentahydrate, 3.5 parts of retarder and 400 parts of water.
4. The slurry for pipe jacking construction thixotropic slurry replacement of claim 1, wherein the mass ratio of the nano calcium hydroxide to the lithium stearate is 5-8: 1.
5. The slurry for pipe jacking construction thixotropic slurry replacement of claim 1, wherein the retarder is one or more of sodium tartrate, sodium gluconate, sodium citrate, sodium salicylate, sodium alginate, sodium dodecyl sulfate, and sodium dodecyl benzene sulfonate.
6. A method for preparing the slurry for pipe jacking construction thixotropic slurry replacement according to any one of claims 1-5, characterized by comprising the following steps:
s1, weighing 150-fold silica gel, 200-fold silica sand, 50-100 parts of modified calcium carbonate, 40-80 parts of nano calcium hydroxide, 8-10 parts of lithium stearate, 1-3 parts of sodium dimethyldithiocarbamate, 1-3 parts of sodium metasilicate pentahydrate, 2-5 parts of retarder and 500 parts of water 300-fold silica gel for later use;
s2, adding the raw materials of modified calcium carbonate, portland cement, nano calcium hydroxide and lithium stearate into a stirrer, and stirring and mixing uniformly to obtain a dry mixture;
and S3, adding water into the dry mixture, stirring while adding water, continuing stirring after adding water, sequentially adding the rest raw materials of sodium dimethyldithiocarbamate, polyacrylamide, sodium metasilicate pentahydrate and retarder, and uniformly stirring and mixing to obtain the slurry replaced by the required thixotropic slurry.
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| CN104045312B (en) * | 2014-06-18 | 2016-03-16 | 天地科技股份有限公司 | In a kind of freezing process, extended slurry replaces working fluid and the method for mud |
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