CN112028594A - Cement-water glass double-liquid grouting material with stable product for shield synchronous grouting - Google Patents
Cement-water glass double-liquid grouting material with stable product for shield synchronous grouting Download PDFInfo
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- CN112028594A CN112028594A CN202010961787.3A CN202010961787A CN112028594A CN 112028594 A CN112028594 A CN 112028594A CN 202010961787 A CN202010961787 A CN 202010961787A CN 112028594 A CN112028594 A CN 112028594A
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- water glass
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 17
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 17
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical group [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 8
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 8
- 239000011398 Portland cement Substances 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 abstract description 29
- 239000007795 chemical reaction product Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 18
- 239000002002 slurry Substances 0.000 description 15
- 238000005336 cracking Methods 0.000 description 11
- 239000004575 stone Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 6
- 238000011056 performance test Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000036571 hydration Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cement-water glass double-liquid grouting material with stable products for shield synchronous grouting, which consists of a liquid A and a liquid B, and is characterized in that: the component of the solution A is cement, fly ash, retarder and water; wherein the cement is 42.5-grade ordinary portland cement, the fly ash is II-grade fly ash, and the retarder is ammonium dihydrogen phosphate with the purity of more than or equal to 99.0%, the pH value of 4.0-4.5 and the clarity of less than or equal to 3; the liquid B is water glass with the Baume degree of 30-40 degrees and the modulus of 3.1-3.3. The grouting material is used for shield synchronous grouting, and has short gelling time and good anti-floating performance of the duct piece; and the reaction product has good stability, is not easy to disintegrate and crack under the natural condition of actual engineering, has small volume shrinkage rate and no deterioration of compressive strength, and the formed segment lining structure has high strength and good waterproof performance.
Description
Technical Field
The invention relates to a grouting material for shield synchronous grouting.
Technical Field
In the tunneling process of the shield tunnel, segments spliced at the shield tail of the shield machine can be separated from the shield tail and enter a soil body along with the propulsion of the shield machine; because the outer diameter of the shield tunneling machine is larger than that of the segment ring, an annular shield gap can be formed between the segment and the soil body which are separated from the shield tail; the grouting needs to be carried out from the shield tail to the back wall uninterruptedly in the propelling process of the shield machine so as to fill the shield gap. The propelling speed of the shield machine is matched with the grouting speed, and one ring of grouting must be completed simultaneously when one ring is propelled, so the synchronous grouting is called. The purpose of the shield synchronous grouting is to fill the annular gap as soon as possible, so that the duct piece is tightly combined with the tunnel soil layer outside the duct piece, and the structure of the shield tunnel is stable and reliable.
At present, the grouting material for shield synchronous grouting is mainly cement paste. When synchronous grouting is carried out, the setting time of cement paste is long and difficult to control; in addition, flowing underground water exists in the soil layer during grouting, so that the grouting calculus rate (the ratio of the initial volume of the slurry to the solidified calculus volume) is low, and the filling slurry between the duct piece and the tunnel soil layer is not full. Gaps between the outer sides of the pipe pieces and the soil layers cannot be filled effectively in time, and a grouting material cannot be gelled in time, so that slurry sinks, and a large free space is formed above the pipe pieces; slurry below the duct piece is concentrated and extruded to generate an upper buoyancy force, so that a shield lining structure formed by the duct piece is in a floating state for a long time. The floating of the duct piece can generate various hazards: one is that the inner contour of the shield tunnel lining exceeds the specified limits and must be handled. And secondly, shearing force is generated on the end face of the shield, so that dislocation, cracking, damage and water leakage of the duct piece are caused, and the compressive strength and the seepage pressure resistance of the duct piece are reduced.
In order to eliminate the damage to the shield tunnel caused by the floating of the duct piece, the gelling property of the grouting material for synchronous grouting needs to be well regulated and controlled, and the gelling time is shortened; and after the duct piece is separated from the shield tail, before floating is not generated, the buoyancy generated by the slurry is eliminated. The cement-water glass double-liquid slurry is adopted for synchronous grouting, the gelling time is adjustable, the early strength is high, and the potential for solving the anti-floating problem of the shield tunnel is realized. However, the calculus body of the existing cement-water glass double-liquid slurry has better long-term stability only under the condition of 95 percent of high humidity, and the calculus rate of a product (calculus body) is lower and the stability is poor under the natural condition of an actual engineering site with the humidity lower than 70 percent; appearance cracking, disintegration and cracking are easy to occur, and the compressive strength is obviously attenuated. In a word, the existing cement-water glass double-liquid slurry is used for synchronous grouting of a shield tunnel, and the product (a stone body) has poor stability, so that the safety and the waterproof performance of a segment lining structure are endangered, and the application of the cement-water glass double-liquid slurry in the synchronous grouting of the shield tunnel is limited.
Disclosure of Invention
The invention aims to provide a cement-water glass double-liquid grouting material for shield synchronous grouting, which has a stable product, is used for shield synchronous grouting, and has short gelling time and good anti-floating performance of pipe pieces; and the reaction product has good stability, is not easy to disintegrate and crack under the natural condition of actual engineering, has small volume shrinkage rate and no deterioration of compressive strength, and the formed segment lining structure has high strength and good waterproof performance.
The invention adopts the technical scheme that the cement-water glass double-liquid grouting material for shield synchronous grouting with stable products consists of a liquid A and a liquid B, and is characterized in that:
the component of the solution A is cement, fly ash, retarder and water; wherein the cement is 42.5-grade ordinary portland cement, the fly ash is II-grade fly ash, and the retarder is ammonium dihydrogen phosphate with the purity of more than or equal to 99.0%, the pH value of 4.0-4.5 and the clarity of less than or equal to 3;
the liquid B is water glass with the Baume degree of 30-40 degrees and the modulus of 3.1-3.3.
Further, the weight ratio of each component in the double-liquid grouting material is as follows: 252-357 parts of cement, 26-142 parts of fly ash, 0.5-3.5 parts of retarder and 636-752 parts of water; 230-395 parts of water glass.
The preparation and application method of the double-liquid grouting material comprises the following steps:
and taking water glass according to the proportion to obtain liquid B. Simultaneously weighing the components of the solution A according to the proportion, then putting the cement and the fly ash into water, and uniformly stirring; then adding retarder and stirring to obtain solution A. When in use, the solution A is poured into the solution B and stirred evenly to obtain the double-solution grouting material. And then when synchronous grouting is needed in the segment installation process of the shield tunnel, grouting by using the synchronous grouting method.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a two-liquid grouting material, which is characterized in that grade II fly ash is added into cement slurry, and the passing rate of a 0.045mm square-hole sieve of the grade II fly ash is more than 80%. The fine fly ash with fine particle size can enhance the rheological property of slurry and the diffusion radius thereof during grouting due to the unique physical characteristics of appearance, internal structure, surface activity and particle grading, so that the particle dispersion degree in cement slurry is increased, the space of cement hydration and the generation place of hydration products are enlarged, and more uniform and firmly combined reaction products (stone bodies) can be formed; thereby reducing the water precipitation rate and the volume shrinkage rate and improving the compression strength in the middle and later periods; obviously reduces or avoids appearance cracking, disintegration and crackle of the stone body, reduces the compression strength attenuation and improves the stability of the product.
Secondly, the fly ash contains SiO2、Al2O3Active ingredients which react with a large amount of Ca (OH) in the cement hydration product2Performing a volcanic ash reaction to generate C-S-H calcium silicate hydrate gel and A-S-H calcium aluminate hydrate gel; the strength of the stone body is increased, the micropore structure in the stone body is reduced, the permeability of the stone body is reduced, and the invasion hazard of external harmful chemical ions is reduced; meanwhile, calcium hydroxide generated by cement hydration is consumed by volcanic ash reaction, and the risk of leaching of calcium hydroxide is reduced. In a word, the active chemical reaction also obviously reduces the water precipitation rate and the volume shrinkage rate of the product, and improves the compression strength in the middle and later periods; the stability of the product is improved.
The active chemical reaction of the fly ash is slower than that of cement hydration, fine particles of the fly ash in the early stage are uniformly distributed in a base phase of the cement slurry, and the fine aggregate effect is also realized, so that the proportion of the fine particles in a slurry system is increased, the cohesive force of a mixture is increased, the segregation and bleeding of the slurry are reduced, and the volume shrinkage of a concretion body is also reduced; further reducing the water precipitation rate and the volume shrinkage rate of the product, improving the compressive strength of the stone body and improving the stability of the product.
In a word, the invention realizes the adjustment of the gelation time through the water glass and the retarder with specific mixture ratio, so that the duct piece has good anti-floating performance; the active material with filling effect and smaller particle size, namely the fly ash, is doped to replace part of cement, so that the dispersion degree of gelled substances in a grouting material system is increased, more and firmer gelled substances are formed, the microporous structure in a stone body is reduced, the volume shrinkage of the stone body is reduced, the cracking and disintegration of the stone body are inhibited, and the strength is deteriorated; under the natural humidity condition of actual engineering, the product has good long-term stability, the stone body is not easy to crack and disintegrate, and the strength is not deteriorated.
The present invention will be described in further detail with reference to specific embodiments.
Detailed Description
Example one
The cement-water glass double-liquid grouting material for shield synchronous grouting with stable products comprises a liquid A and a liquid B, and is characterized in that:
the component of the solution A is cement, fly ash, retarder and water; wherein, the cement is 42.5-grade ordinary portland cement, the fly ash is II-grade fly ash, and the retarder is ammonium dihydrogen phosphate with the purity of 99.0 percent, the PH value of 4.0 and the clarity of 3;
the liquid B is water glass with the Baume degree of 30 degrees and the modulus of 3.1.
The weight ratio of each component in the embodiment is as follows: 252 parts of cement, 29 parts of fly ash, 1.9 parts of retarder and 675 parts of water; 319 parts of water glass.
In order to verify the product stability of the cement-water glass double-liquid grouting material for shield synchronous grouting, a corresponding control example without adding fly ash is prepared. And the performance test and the product stability observation are carried out on the examples and the comparative examples under the natural condition of 60 percent of humidity.
Comparison example 1
The comparison example one differs from the embodiment one only in that: the liquid A does not contain fly ash.
The results of performance testing and product stability observation under natural temperature and humidity conditions of example one and comparative example one are as follows.
Table 1 product properties under natural temperature and humidity conditions for example one and comparative example one
The performance tests in table 1 show that the water separation rate, the 7d compressive strength, the 28d strength loss rate and the 14d volume shrinkage rate of the first example are far better than those of the first comparative example;
product stability observations indicate that: after 28 days of grouting, the calculus body of the first example has no cracking and disintegration, while the calculus body of the second comparative example has cracking, shrinkage, disintegration and the like in 3 days.
It can be seen that the product stability of example one is much better than that of comparative example one.
Example two
The composition of this example is essentially the same as that of example one, except that:
the retarder is ammonium dihydrogen phosphate with the purity of 99.5 percent, the PH value of 4.5 and the clarity of 2.5;
water glass with the Baume degree of 40 degrees and the modulus of 3.3;
the weight ratio of each component is as follows: 263 parts of cement, 66 parts of fly ash, 2.6 parts of retarder and 659 parts of water; 319 parts of water glass.
Comparative example two
The comparison example two is different from the embodiment two only in that: the liquid A does not contain fly ash.
The results of performance test and product stability observation under natural temperature and humidity conditions of example two and comparative example two are as follows.
TABLE 2 product Properties under natural humiture conditions for example two and comparative example two
The performance tests in table 2 show that the water separation rate, the 7d compressive strength, the 28d strength loss rate and the 14d volume shrinkage rate of the second example are far better than those of the second comparative example;
product stability observations indicate that: after 28 days of grouting, the calculus body of the second example has no cracking and disintegration, while the calculus body of the second comparative example has cracking, shrinkage, disintegration and the like in 3 days.
It can be seen that the product stability of example two is also much better than that of comparative example two.
EXAMPLE III
The composition of this example is essentially the same as example one, except that:
the retarder is ammonium dihydrogen phosphate with the purity of 99.8 percent, the PH value of 4.2 and the clarity of 2.0;
water glass with 35 degrees of Baume degree and 3.2 modulus;
the weight ratio of each component is as follows: 278 parts of cement, 120 parts of fly ash, 2.8 parts of retarder and 636 parts of water; 319 parts of water glass.
Comparative example three
The third comparative example is different from the third example only in that: the liquid A does not contain fly ash.
The results of performance test and product stability observation under natural temperature and humidity conditions of example three and comparative example three are as follows.
TABLE 3 product Properties of example III and comparative example III
The performance tests in table 3 show that the water separation rate, the 7d compressive strength, the 28d strength loss rate and the 14d volume shrinkage rate of the third example are far better than those of the third comparative example;
product stability observations indicate that: after 28 days of grouting, the calculus body of the third example has no cracking and disintegration, while the calculus body of the third comparative example has cracking, shrinkage, disintegration and the like in 3 days.
It can be seen that the product stability of example three is also much better than that of control three.
The grade II fly ash in the invention is fly ash with the screen residue of a 0.045mm square-hole screen not more than 30%, the water requirement ratio not more than 105%, the loss on ignition not more than 8% and the water content not more than 1%.
Example four
The composition of this example is essentially the same as example one, except that:
the retarder is ammonium dihydrogen phosphate with the purity of 99.9 percent, the PH value of 4.2 and the clarity of 1.5;
water glass with the Baume degree of 36 degrees and the modulus of 3.1;
the weight ratio of each component is as follows: 357 parts of cement, 26 parts of fly ash, 0.5 part of retarder and 636 parts of water; 230 parts of water glass.
EXAMPLE five
The composition of this example is essentially the same as example one, except that:
the retarder is ammonium dihydrogen phosphate with the purity of 99.7 percent, the PH value of 4.3 and the clarity of 1.0;
water glass with the Baume degree of 38 degrees and the modulus of 3.3;
the weight ratio of each component is as follows: 300 parts of cement, 142 parts of fly ash, 3.5 parts of retarder and 752 parts of water; 395 parts of water glass.
Claims (2)
1. The cement-water glass double-liquid grouting material with stable products for shield synchronous grouting comprises a liquid A and a liquid B, and is characterized in that:
the component of the solution A is cement, fly ash, retarder and water; wherein the cement is 42.5-grade ordinary portland cement, the fly ash is II-grade fly ash, and the retarder is ammonium dihydrogen phosphate with the purity of more than or equal to 99.0%, the pH value of 4.0-4.5 and the clarity of less than or equal to 3;
the liquid B is water glass with the Baume degree of 30-40 degrees and the modulus of 3.1-3.3.
2. The cement-water glass double-liquid grouting material for shield synchronous grouting according to claim 1, characterized in that:
the weight ratio of each component is as follows: 252-357 parts of cement, 26-142 parts of fly ash, 0.5-3.5 parts of retarder and 636-752 parts of water; 230-395 parts of water glass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961787.3A CN112028594A (en) | 2020-09-14 | 2020-09-14 | Cement-water glass double-liquid grouting material with stable product for shield synchronous grouting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010961787.3A CN112028594A (en) | 2020-09-14 | 2020-09-14 | Cement-water glass double-liquid grouting material with stable product for shield synchronous grouting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830757A (en) * | 2021-02-07 | 2021-05-25 | 山东省路桥集团有限公司 | Modified sodium silicate quick-setting material and preparation method thereof |
| CN113185256A (en) * | 2021-03-30 | 2021-07-30 | 中国十七冶集团有限公司 | Performance-controllable cement composite slurry and preparation method thereof |
| CN114751714A (en) * | 2022-05-06 | 2022-07-15 | 山西中科赛德能源科技有限公司 | Inorganic rapid-setting double-liquid grouting reinforcing material for mine |
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| CN112830757A (en) * | 2021-02-07 | 2021-05-25 | 山东省路桥集团有限公司 | Modified sodium silicate quick-setting material and preparation method thereof |
| CN113185256A (en) * | 2021-03-30 | 2021-07-30 | 中国十七冶集团有限公司 | Performance-controllable cement composite slurry and preparation method thereof |
| CN114751714A (en) * | 2022-05-06 | 2022-07-15 | 山西中科赛德能源科技有限公司 | Inorganic rapid-setting double-liquid grouting reinforcing material for mine |
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