CN101269938A - Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof - Google Patents
Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof Download PDFInfo
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- CN101269938A CN101269938A CNA2008100474996A CN200810047499A CN101269938A CN 101269938 A CN101269938 A CN 101269938A CN A2008100474996 A CNA2008100474996 A CN A2008100474996A CN 200810047499 A CN200810047499 A CN 200810047499A CN 101269938 A CN101269938 A CN 101269938A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention relates to tunnel-wall post-injection pulp material and a preparation method of the tunnel-wall post-injection pulp material. Tunnel back-lining pulp-injection material that can prevent the upward-floating of the duct piece is characterized in consisting of a substrate compound A and an additive compound B, wherein, the substrate compound A includes cement, fly ash, sand and water; the additive compound B includes silicone ash, swell soil, droxyethylcellulose, polyacrylamide, sulfamate, naphthaline water-reducing agent and gluconic acid sodium salt; the ratio of the ingredients (kg/m<3>): 100 to 200 portions of cement, 300 to 600 portions of fly ash, 800 to 1600 portions of sand, 280 to 560 portions of water, 10 to 40 portions of silicone ash, 12 to 30 portions of swell soil, 0.4 to 0.8 portions of droxyethylcellulose, 0.2 to 0.4 portions of polyacrylamide, 0.2 to 0.4 portions of sulfamate, 1.6 to 2.9 portions of naphthaline water-reducing agent and 0.2 to 0.4 portions of gluconic acid sodium salt. The present invention can realize the high stability, high water dispersion prevention, high-efficient water-reducing plasticity preservation and adjustable performance of the pulp-injection material the condensation under the conditions of high water pressure and water satuation, thereby greatly improving the working performance and the durance of the pulp-injection material.
Description
Technical field
The invention belongs to the material of construction class, be specifically related to tunnel wall post slip-casting material and preparation method thereof.
Background technology
Along with large-scale construction successively of striding the Jiang Hai tunnel both at home and abroad, shielded construction technology under the various working conditions will be faced with severe challenge, running into stratum soft or hard inequality, longitudinally geologic condition changes complicated, the tunnel is long, caliber is big, under the high situation of section hydraulic pressure, common synchronous grouting material is when being subjected to high pressure and being rich in the souring of water in the water stratum, the injecting paste material quilt is towards rare, the destruction that causes material structure, not only can not play the purpose of filling the stratum, and can directly influence the pipe-plate lining stability of structure, slurries flow into the section of jurisdiction arch end, raise the section of jurisdiction, the come-up of aggravation section of jurisdiction.Simultaneously, the weather resistance of synchronous grouting material descends, and makes it lose waterproof ability and bearing capacity too early.At present, shield tunnel grouting behind shaft or drift lining material only is to develop with engineering at operating mode under low hydraulic pressure or the anhydrous press strip spare to use, during use injecting paste material exist poor stability (decant rate 〉=4%), duration of service short (〉=8h), in the water anti-dispersing property poor (weak point such as suspended substance quality 〉=50mg/L), gel time adjustability are bad, key are to satisfy the (〉=0.4MPa) service requirements of grouting behind shaft or drift lining material under the full water condition of existing harsh operating mode such as high hydraulic pressure.Therefore, satisfy its high stability and anti-water-dispersion ability, gel time adjustability simultaneously at the shield tunnel grouting behind shaft or drift lining material of a kind of special use of urgent need under the full water condition of high hydraulic pressure.
Common shield tunnel synchronous grouting material mainly with the filling stratum, reduce subsidence of foundations amount, guarantee environmental safety and be main design objective as the enhancement Layer of liner structure, and the design and the evaluation of shortage material function under special geologic condition, especially slurries are easily washed away by water and cause slurries to lose the filling function under the full water condition of high hydraulic pressure, cause the section of jurisdiction non-matted state, tunnel duct piece can be considered and is immersed among the liquid simultaneously, under buoyancy function, will inevitably produce come-up and settlement of foundation phenomenon, have a strong impact on the safety of structure in tunnel.
Summary of the invention
The object of the present invention is to provide a kind of tunnel backing cloth slip casting material that prevents duct piece float upward and preparation method thereof, the tunnel backing cloth slip casting material of this method preparation high hydraulic pressure (＞0.4MPa) the saturation water geologic condition down use have high stable (can prevent duct piece float upward), dispersing property not under water.
To achieve these goals, technical scheme of the present invention is: a kind of tunnel backing cloth slip casting material that prevents duct piece float upward, it is characterized in that it by matrix component A with mix B component outward and be prepared from, matrix component A is: cement, flyash, Sha Heshui; Mixing B component outward is: silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer (or claiming the FDN high efficiency water reducing agent) and Sunmorl N 60S; Proportioning (the kg/m of each component
3) be: cement: 100～200, flyash: 300～600, sand: 800～1600, water: 280～560, silicon ash: 10～40, wilkinite: 12～30, Natvosol: 0.4～0.8, polyacrylamide: 0.2～0.4, sulfamate: 0.2～0.4, naphthalene water reducer: 1.6～2.9, Sunmorl N 60S: 0.2～0.4.
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg.
Described flyash is I level flyash or II level flyash, and density is 2.7～2.9g/cm
3, specific surface is greater than 500cm
2/ g.
The fineness modulus of described sand is 0.9-1.6.
The specific surface area of described silicon ash is 19000～20000m
2/ kg.
Described bentonitic water ratio＜10%, fineness specification are 200～250 orders.
Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4
Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6
Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30%; Sulfamate is thionamic acid sodium or thionamic acid potassium.
The water-reducing rate of described naphthalene water reducer is 20%～25%, powdery, and model is FDN9000.
Described Sunmorl N 60S is a market pure chemistry reagent.
Above-mentioned a kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1). starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 100～200, flyash: 300～600, sand: 800～1600, water: 280～560, silicon ash: 10～40, wilkinite: 12～30, Natvosol: 0.4～0.8, polyacrylamide: 0.2～0.4, sulfamate: 0.2～0.4, naphthalene water reducer: 1.6～2.9, Sunmorl N 60S: 0.2～0.4; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing, get matrix component A; To mix outward then B component mix stir among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and carries out slip casting.
The invention has the beneficial effects as follows: the present invention adopts matrix component A (cement, flyash, Sha Heshui) and mixes B component (silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S) outward and be prepared from according to proportioning, by slurry consistency (9.0～10.0cm), the slump (3.0～4.0cm) two control methods realize tunnel backing cloth slip casting materials high hydraulic pressure (＞0.4MPa) the saturation water geologic condition down use have high stability (can prevent duct piece float upward); Stablize component by optimizing synthetic silicon ash-wilkinite-Natvosol-polyacrylamide composite water conservation, realize not disperseing under the slurry water; Optimize efficient diminishing guarantor and moulded component (sulfamate, naphthalene water reducer and Sunmorl N 60S), regulate time of coagulation and workability by changing volume, compound anti-water-dispersion component (silicon ash, wilkinite, Natvosol, polyacrylamide) and efficient diminishing protected to mould component compound, acting in conjunction is brought into play its diminishing, is protected the effect of moulding, adsorb, stablize, flocculating, change gel time by changing volume, improve diminishing protect plasticity energy.Production cost of the present invention is low, can satisfy the requirement of grouting equipment; And convenient, the anti-stop ring longitudinal joint seepage of construction management, Land-Subsidence Control is within allowed band.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with example, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1). starting material are chosen: the ratio of each component is: cement: 101kg/m
3, flyash: 302kg/m
3, sand: 805kg/m
3, water: 285kg/m
3, silicon ash: 10kg/m
3, wilkinite: 12kg/m
3, Natvosol: 0.4kg/m
3, polyacrylamide: 0.21kg/m
3, sulfamate: 0.2kg/m
3, naphthalene water reducer: 1.6kg/m
3, Sunmorl N 60S: 0.21kg/m
3Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg; Described flyash is I level flyash, and density is 2.5～2.7g/cm
3, specific surface area is greater than 500cm
2/ g; The fineness modulus of described sand is 1.0; The specific surface area of described silicon ash is 20000m
2/ kg; Described bentonitic water ratio＜10%, fineness specification are 200～250 orders; Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30% (sulfamate is a thionamic acid sodium); Described naphthalene water reducer is the FDN-9000 naphthalene water reducer, and water-reducing rate is 20%～25%, powdery; Wuhan Hao Yuan admixture factory; Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.Proportioning such as table 1, the performance such as the table 2 of tunnel backing cloth slip casting material.
Embodiment 2:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1) starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 120, flyash: 360, sand: 960, water: 336, the silicon ash: 12, wilkinite: 15, Natvosol 0.48, polyacrylamide: 0.24, sulfamate: 0.25, naphthalene water reducer: 1.92, Sunmorl N 60S: 0.25; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg; Described flyash is I level flyash, and density is 2.5～2.7g/cm
3, specific surface area is greater than 500cm
2/ g; The fineness modulus of described sand is 1.0; The specific surface area of described silicon ash is 20000m
2/ kg; Described bentonitic water ratio＜10%, fineness specification are 200～250 orders; Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30% (sulfamate is a thionamic acid sodium); Described naphthalene water reducer is the FDN-9000 naphthalene water reducer, and water-reducing rate is 20%～25%, powdery; Wuhan Hao Yuan admixture factory; Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.Proportioning such as table 1, the performance such as the table 2 of tunnel backing cloth slip casting material.
Embodiment 3:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1) starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 142, flyash: 426, sand: 1120, water: 401, the silicon ash: 14, wilkinite: 18, Natvosol 0.56, polyacrylamide: 0.28, sulfamate: 0.28, naphthalene water reducer: 2.24, Sunmorl N 60S: 0.27; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg; Described flyash is I level flyash, and density is 2.5～2.7g/cm
3, specific surface area is greater than 500cm
2/ g; The fineness modulus of described sand is 1.0; The specific surface area of described silicon ash is 20000m
2/ kg; Described bentonitic water ratio＜10%, fineness specification are 200～250 orders; Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30% (sulfamate is a thionamic acid sodium); Described naphthalene water reducer is the FDN-9000 naphthalene water reducer, and water-reducing rate is 20%～25%, powdery; Wuhan Hao Yuan admixture factory; Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the composite uniform mixing of Sunmorl N 60S employing physics is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.Proportioning such as table 1, the performance such as the table 2 of tunnel backing cloth slip casting material.
Embodiment 4:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1) starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 160, flyash: 480, sand: 1280, water: 451, the silicon ash: 16, wilkinite: 21, Natvosol 0.64, polyacrylamide: 0.32, sulfamate: 0.31, naphthalene water reducer: 2.56, Sunmorl N 60S: 0.32; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg; Described flyash is I level flyash, and density is 2.5～2.7g/cm
3, specific surface area is greater than 500cm
2/ g; The fineness modulus of described sand is 1.0; The specific surface area of described silicon ash is 20000m
2/ kg; Described bentonitic water ratio＜10%, fineness specification are 200～250 orders; Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30% (sulfamate is a thionamic acid sodium); Described naphthalene water reducer is the FDN-9000 naphthalene water reducer, and water-reducing rate is 20%～25%, powdery; Wuhan Hao Yuan admixture factory; Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the composite uniform mixing of Sunmorl N 60S employing physics is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.Proportioning such as table 1, the performance such as the table 2 of tunnel backing cloth slip casting material.
Embodiment 5:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1) starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 180, flyash: 540, sand: 1440, water: 505, the silicon ash: 18, wilkinite: 24, Natvosol 0.72, polyacrylamide: 0.36, sulfamate: 0.35, naphthalene water reducer: 2.88, Sunmorl N 60S: 0.35; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg; Described flyash is I level flyash, and density is 2.5～2.7g/cm
3, specific surface area is greater than 500cm
2/ g; The fineness modulus of described sand is 1.0; The specific surface area of described silicon ash is 20000m
2/ kg; Described bentonitic water ratio＜10%, fineness specification are 200～250 orders; Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30% (sulfamate is a thionamic acid sodium); Described naphthalene water reducer is the FDN-9000 naphthalene water reducer, and water-reducing rate is 20%～25%, powdery; Wuhan Hao Yuan admixture factory; Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the composite uniform mixing of Sunmorl N 60S employing physics is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.Proportioning such as table 1, the performance such as the table 2 of tunnel backing cloth slip casting material.
Table 1 proportioning (kg/m
3)
Table 2 result
Table 2 result shows: high hydraulic pressure (＞0.4MPa) under the full water condition, the present invention can realize high stability (decant rate＜4%), high anti-water dispersible (pH value＜9,28d land and water strength ratio＞80%) and time of coagulation, adjustable (performance of 5h～12h) improved the serviceability and the weather resistance of injecting paste material greatly.
Embodiment 6:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1). starting material are chosen: the weight proportion of each component is: cement: 100kg/m
3, flyash: 300kg/m
3, sand: 800kg/m
3, water: 280kg/m
3, silicon ash: 10kg/m
3, wilkinite: 12kg/m
3, Natvosol 0.4kg/m
3, polyacrylamide: 0.2kg/m
3, sulfamate: 0.2kg/m
3, naphthalene water reducer: 1.6kg/m
3, Sunmorl N 60S: 0.2kg/m
3Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg.Described flyash is II level flyash, and density is 2.7～2.9g/cm
3, specific surface is greater than 500cm
2/ g.The fineness modulus of described sand is 0.9.The specific surface area of described silicon ash is 19000m
2/ kg.Described bentonitic water ratio＜10%, fineness specification are 200 orders.Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30%.Sulfamate is a thionamic acid sodium.The water-reducing rate of described naphthalene water reducer is 20%～25%, powdery, and model is FDN9000.Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.
Embodiment 7:
A kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward comprises the steps:
1). starting material are chosen: the weight proportion of each component is: cement: 200kg/m
3, flyash: 600kg/m
3, sand: 1600kg/m
3, water: 560kg/m
3, silicon ash: 40kg/m
3, wilkinite: 30kg/m
3, Natvosol 0.8kg/m
3, polyacrylamide: 0.4kg/m
3, sulfamate: 0.4kg/m
3, naphthalene water reducer: 2.9kg/m
3, Sunmorl N 60S: 0.4kg/m
3Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
Described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg.Described flyash is II level flyash, and density is 2.7～2.9g/cm
3, specific surface is greater than 500cm
2/ g.The fineness modulus of described sand is 1.6.The specific surface area of described silicon ash is 20000m
2/ kg.Described bentonitic water ratio＜10%, fineness specification are 250 orders.Described Natvosol (HEC) is white tasteless powder, and water-soluble, molecular weight is about 6 * 10
4Described polyacrylamide (PAM) is white tasteless powder, and soluble in water, molecular weight is about 8 * 10
6Described sulfamate is the chocolate viscous liquid, relative density 1.68～1.8g/cm
3, water-reducing rate is 25～30%.Sulfamate is a thionamic acid potassium.The water-reducing rate of described naphthalene water reducer is 20%～25%, powdery, and model is FDN9000.Described Sunmorl N 60S is a market pure chemistry reagent.
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing (stirring 2 minutes), get matrix component A; To mix outward then B component mix stirred 3 minutes among the matrix component A after, a kind of tunnel backing cloth slip casting material (" toothpaste " shape) that prevents duct piece float upward, be stored to the slurries hold-up vessel immediately, as ready is passed to shield structure scene and pours into.
Claims (8)
1. tunnel backing cloth slip casting material that can prevent duct piece float upward, it is characterized in that it by matrix component A with mix B component outward and be prepared from, matrix component A is: cement, flyash, Sha Heshui; Mixing B component outward is: silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S; Proportioning (the kg/m of each component
3) be: cement: 100～200, flyash: 300～600, sand: 800～1600, water: 280～560, silicon ash: 10～40, wilkinite: 12～30, Natvosol: 0.4～0.8, polyacrylamide: 0.2～0.4, sulfamate: 0.2～0.4, naphthalene water reducer: 1.6～2.9, Sunmorl N 60S: 0.2～0.4.
2. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1, it is characterized in that: described cement is the 42.5# ordinary Portland cement, and specific surface area is greater than 350m
2/ kg.
3. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1 is characterized in that: described flyash is I level flyash or II level flyash, and density is 2.7～2.9g/cm
3, specific surface is greater than 500cm
2/ g.
4. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1 is characterized in that: the fineness modulus of described sand is 0.9-1.6.
5. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1 is characterized in that: the specific surface area of described silicon ash is 19000～20000m
2/ kg.
6. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1 is characterized in that: described bentonitic water ratio＜10%, fineness specification are 200～250 orders.
7. a kind of tunnel backing cloth slip casting material that prevents duct piece float upward according to claim 1 is characterized in that: sulfamate is thionamic acid sodium or thionamic acid potassium.
8. a kind of preparation method who prevents the tunnel backing cloth slip casting material of duct piece float upward as claimed in claim 1 comprises the steps:
1). starting material are chosen: the proportioning (kg/m of each component
3) be: cement: 100～200, flyash: 300～600, sand: 800～1600, water: 280～560, silicon ash: 10～40, wilkinite: 12～30, Natvosol: 0.4～0.8, polyacrylamide: 0.2～0.4, sulfamate: 0.2～0.4, naphthalene water reducer: 1.6～2.9, Sunmorl N 60S: 0.2～0.4; Choose cement, flyash, sand, water, silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and Sunmorl N 60S, standby;
2) at first, encapsulation behind silicon ash, wilkinite, Natvosol, polyacrylamide, sulfamate, naphthalene water reducer and the Sunmorl N 60S uniform mixing is stored, get the outer B component of mixing; Cement, flyash, Sha Heshui are carried out mechanically mixing, get matrix component A; To mix outward then B component mix stir among the matrix component A after, a kind of tunnel backing cloth slip casting material that prevents duct piece float upward.
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|---|---|---|---|
| CNA2008100474996A CN101269938A (en) | 2008-04-29 | 2008-04-29 | Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100474996A CN101269938A (en) | 2008-04-29 | 2008-04-29 | Tunnel backing cloth slip casting material capable of preventing duct piece float upward and preparation method thereof |
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|---|---|---|---|
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