CN107721242A - A kind of rapid hardening gunite concrete - Google Patents

A kind of rapid hardening gunite concrete Download PDF

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Publication number
CN107721242A
CN107721242A CN201711216852.4A CN201711216852A CN107721242A CN 107721242 A CN107721242 A CN 107721242A CN 201711216852 A CN201711216852 A CN 201711216852A CN 107721242 A CN107721242 A CN 107721242A
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China
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parts
rapid hardening
gunite concrete
water
concrete
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CN201711216852.4A
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Chinese (zh)
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王德元
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Individual
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Priority to CN201711216852.4A priority Critical patent/CN107721242A/en
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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
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/12—Set accelerators
    • 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

Abstract

A kind of rapid hardening gunite concrete, its preparation method include：Interior sealing compound is prepared first, and its preparation method comprises the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous 30 40 parts of silica aerogel, 35 parts of hydroxyethyl cellulose, 23 parts of sodium gluconate, 13 parts of hydroxypropyl starch ether, 12 parts of potassium phosphate, 10 20 parts of water, by hydroxyethyl cellulose, sodium gluconate, hydroxypropyl starch ether, potassium phosphate and water mixing, sealing compound improves itself porous material hole wetability in the present invention, moisture content is set to be penetrated into saturation in porous material, secondly may be floated in the small concrete of porous material density, mixture mobility is deteriorated but more hole densities become big after water of satisfying, rising phenomenon will not be produced, the service behaviour of concrete is substantially unaffected.

Description

A kind of rapid hardening gunite concrete
Technical field
The present invention relates to a kind of rapid hardening gunite concrete, belongs to technical field of concrete.
Background technology
Gunite concrete is main supporting means.After tunnel excavation, with " most fast " speed to country rock gunite concrete, its Purpose is within " most short " time, can to restrain the relaxation or deformation of country rock.Gunite concrete is set to play support action, It is required that it reaches certain intensity within " short time ", here it is the early strength of gunite concrete.Existing gunite concrete Conserved again after needing hardening, the defects of shield existence time is long, maintenance is unstable, intensity easily reduces, and intensity is still not Ideal, it is also easy to produce crackle.
The content of the invention
The present invention provides a kind of rapid hardening gunite concrete and its manufacture method to solve the above problems.
A kind of rapid hardening gunite concrete, its preparation method include：Interior sealing compound is prepared first, and its preparation method includes following Step：Interior sealing compound includes following parts by weight of raw materials：Porous silica aerogel 30-40 parts, hydroxyethyl cellulose 3-5 parts, glucose Sour sodium 2-3 parts, hydroxypropyl starch ether 1-3 parts, potassium phosphate 1-2 parts, water 10-20 parts, by hydroxyethyl cellulose, sodium gluconate, Hydroxypropyl starch ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, the well mixed standing 2- of porous silica aerogel is added afterwards 4 hours, obtain interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By parts by weight aluminium vanadine 50-70 parts and zinc oxide 20-25 After part mixing in ball mill ball milling, Ball-milling Time 30-50 minutes, obtain ball milling material, then by aluminum phosphate 10-20 parts, hydroxide Sodium 5-10 parts, ferrous sulfate 2-10 parts are mixed with above-mentioned ball milling material, obtain rapid hardening masterbatch, by the magnesium fluosilicate aqueous solution Cellulose ether 3-10 parts are added in 40-50 parts to stir to form mixed liquor, and speed is added dropwise with 3-3.5 ml/mins in mixed liquor Degree is added drop-wise in rapid hardening masterbatch, is added hexafluoro afterwards and is closed sodium aluminate 5-8 parts, and constant temperature stirs 10-20 minutes at 30-40 DEG C, Obtain accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：Portland cement 130-150 parts, flyash 10-15 parts, Silica flour 5-10 parts, zeolite powder 5-10 parts, sand 100-120 parts, stone 120-150 parts, tetraethyl orthosilicate 5-8 parts, above-mentioned interior maintenance Agent 10-25 parts, water reducer 1-3 parts, above-mentioned accelerator 4-6 parts, water 40-50 parts, above-mentioned raw materials are well mixed, obtain rapid hardening spray Penetrate concrete.
A kind of preparation method of rapid hardening gunite concrete, its preparation method include：Interior sealing compound, its preparation side are prepared first Method comprises the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous silica aerogel 30-40 parts, hydroxyethyl cellulose 3-5 Part, sodium gluconate 2-3 parts, hydroxypropyl starch ether 1-3 parts, potassium phosphate 1-2 parts, water 10-20 parts, by hydroxyethyl cellulose, Portugal Grape sodium saccharate, hydroxypropyl starch ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, porous silica aerogel mixing is added afterwards 2-4 hours uniformly are stood, obtain interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By parts by weight aluminium vanadine 50-70 parts and zinc oxide 20-25 After part mixing in ball mill ball milling, Ball-milling Time 30-50 minutes, obtain ball milling material, then by aluminum phosphate 10-20 parts, hydroxide Sodium 5-10 parts, ferrous sulfate 2-10 parts are mixed with above-mentioned ball milling material, obtain rapid hardening masterbatch, by the magnesium fluosilicate aqueous solution Cellulose ether 3-10 parts are added in 40-50 parts to stir to form mixed liquor, and speed is added dropwise with 3-3.5 ml/mins in mixed liquor Degree is added drop-wise in rapid hardening masterbatch, is added hexafluoro afterwards and is closed sodium aluminate 5-8 parts, and constant temperature stirs 10-20 minutes at 30-40 DEG C, Obtain accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：Portland cement 130-150 parts, flyash 10-15 parts, Silica flour 5-10 parts, zeolite powder 5-10 parts, sand 100-120 parts, stone 120-150 parts, tetraethyl orthosilicate 5-8 parts, above-mentioned interior maintenance Agent 10-25 parts, water reducer 1-3 parts, above-mentioned accelerator 4-6 parts, water 40-50 parts, above-mentioned raw materials are well mixed, obtain rapid hardening spray Penetrate concrete.
A kind of described rapid hardening gunite concrete and its manufacture method, it is small to add the well mixed standing 3 of porous silica aerogel When
A kind of described rapid hardening gunite concrete and its manufacture method, the porosity of porous silica aerogel is 60-70%, apparent close Spend for 0.4-0.45g/m3, specific surface area 400-500m2/g.
A kind of described rapid hardening gunite concrete and its manufacture method, Ball-milling Time 40 minutes
A kind of described rapid hardening gunite concrete and its manufacture method, mixed liquor are added drop-wise to rapid hardening with 3 ml/min rate of addition In masterbatch
A kind of described rapid hardening gunite concrete and its manufacture method, constant temperature stirs 20 minutes at 40 DEG C
A kind of described rapid hardening gunite concrete and its manufacture method, the water reducer select polycarboxylate water-reducer.
A kind of described rapid hardening gunite concrete and its manufacture method, the flyash select I grade of flyash.
A kind of described rapid hardening gunite concrete and its manufacture method, the flyash select I grade of flyash.
A kind of described rapid hardening gunite concrete and its manufacture method, the silica flour fineness are the mesh of 60 mesh -110.
A kind of described rapid hardening gunite concrete and its manufacture method, the matter of magnesium fluosilicate and water in the magnesium fluosilicate aqueous solution Amount is than being 1:20-50..
Sealing compound improves itself porous material hole wetability in the present invention, moisture content is penetrated into porous material with saturation In, it secondly may be floated in the small concrete of porous material density, mixture mobility is deteriorated but more hole densities become big after water of satisfying, Rising phenomenon will not be produced, the service behaviour of concrete is substantially unaffected, accelerator of the present invention make it that concrete early stage is strong Degree improves, and inside concrete is had certain contraction, and inside concrete forms pressure difference and wet in the presence of accelerator Degree is poor, and interior conserving material improves inside concrete relative humidity by providing moisture to inside concrete, promotes aquation, interior maintenance Material can increase the degree of hydration of concrete, improve hydrated product C-S-H growing amount, compared to later stage conventional maintenance, change The mechanical property of kind concrete.
Embodiment
Rapid hardening gunite concrete the performance test results of the embodiment of the present invention
Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Accelerator and interior sealing compound are not added, use conventional maintenance method
Presetting period min 15 15 18 13 140
Final setting time min 25 24 27 25 230
1 day compression strength MPa 17.3 16.7 15.4 16.3 10.5
7 days compression strength MPa 25.9 26.3 25.6 27.1 21.6
28 days compression strength MPa 35.6 33.3 34.8 33.9 28.8
Embodiment 1
A kind of rapid hardening gunite concrete and preparation method thereof, its preparation method includes：Interior sealing compound, its preparation method are prepared first Comprise the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous 33 parts of silica aerogel, 3 parts of hydroxyethyl cellulose, grape 2 parts of sodium saccharate, 1 part of hydroxypropyl starch ether, 1 part of potassium phosphate, 16 parts of water, by hydroxyethyl cellulose, sodium gluconate, hydroxypropyl forms sediment Powder ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, add the well mixed standing of porous silica aerogel 2 hours afterwards, obtain Interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By the 20 parts of mixing of 65 parts of parts by weight aluminium vanadine and zinc oxide The ball milling in ball mill afterwards, Ball-milling Time 45 minutes, ball milling material is obtained, then 12 parts of aluminum phosphate, 6 parts of sodium hydroxide, sulfuric acid is sub- 4 parts of iron is mixed with above-mentioned ball milling material, obtains rapid hardening masterbatch, cellulose ether 8 will be added in 42 parts of the magnesium fluosilicate aqueous solution Part is stirred to form mixed liquor, and mixed liquor is added drop-wise in rapid hardening masterbatch with 3 ml/min rate of addition, added afterwards Hexafluoro closes 7 parts of sodium aluminate, and constant temperature stirs 15 minutes at 35 DEG C, obtains accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：130 parts of Portland cement, 14 parts of flyash, silica flour 5 Part, 5 parts of zeolite powder, 110 parts of sand, 125 parts of stone, 6 parts of tetraethyl orthosilicate, above-mentioned interior 15 parts of sealing compound, 1 part of water reducer are above-mentioned 4 parts of accelerator, 48 parts of water, above-mentioned raw materials are well mixed, and obtain rapid hardening gunite concrete.
Embodiment 2
A kind of rapid hardening gunite concrete and preparation method thereof, its preparation method includes：Interior sealing compound, its preparation method are prepared first Comprise the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous 32 parts of silica aerogel, 5 parts of hydroxyethyl cellulose, grape 3 parts of sodium saccharate, 2 parts of hydroxypropyl starch ether, 1 part of potassium phosphate, 15 parts of water, by hydroxyethyl cellulose, sodium gluconate, hydroxypropyl forms sediment Powder ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, add the well mixed standing of porous silica aerogel 4 hours afterwards, obtain Interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By the 25 parts of mixing of 55 parts of parts by weight aluminium vanadine and zinc oxide The ball milling in ball mill afterwards, Ball-milling Time 50 minutes, ball milling material is obtained, then 18 parts of aluminum phosphate, 9 parts of sodium hydroxide, sulfuric acid is sub- 4 parts of iron is mixed with above-mentioned ball milling material, obtains rapid hardening masterbatch, cellulose ether 7 will be added in 44 parts of the magnesium fluosilicate aqueous solution Part stirs to form mixed liquor, mixed liquor is added drop-wise in rapid hardening masterbatch with 3.5 ml/min rate of addition, Zhi Houjia Entering hexafluoro and close 8 parts of sodium aluminate, constant temperature stirs 13 minutes at 40 DEG C, obtains accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：130 parts of Portland cement, 15 parts of flyash, silica flour 7 Part, 10 parts of zeolite powder, 105 parts of sand, 130 parts of stone, 8 parts of tetraethyl orthosilicate, above-mentioned interior 24 parts of sealing compound, 2 parts of water reducer are above-mentioned 6 parts of accelerator, 42 parts of water, above-mentioned raw materials are well mixed, and obtain rapid hardening gunite concrete.
Embodiment 3
A kind of rapid hardening gunite concrete and preparation method thereof, its preparation method includes：Interior sealing compound, its preparation method are prepared first Comprise the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous 40 parts of silica aerogel, 3 parts of hydroxyethyl cellulose, grape 3 parts of sodium saccharate, 2 parts of hydroxypropyl starch ether, 1 part of potassium phosphate, 13 parts of water, by hydroxyethyl cellulose, sodium gluconate, hydroxypropyl forms sediment Powder ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, add the well mixed standing of porous silica aerogel 2.5 hours afterwards, obtain To interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By the 20 parts of mixing of 60 parts of parts by weight aluminium vanadine and zinc oxide The ball milling in ball mill afterwards, Ball-milling Time 36 minutes, ball milling material is obtained, then 18 parts of aluminum phosphate, 9 parts of sodium hydroxide, sulfuric acid is sub- 5 parts of iron is mixed with above-mentioned ball milling material, obtains rapid hardening masterbatch, cellulose ether 10 will be added in 40 parts of the magnesium fluosilicate aqueous solution Part is stirred to form mixed liquor, and mixed liquor is added drop-wise in rapid hardening masterbatch with 3 ml/min rate of addition, added afterwards Hexafluoro closes 5 parts of sodium aluminate, and constant temperature stirs 18 minutes at 30 DEG C, obtains accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：130 parts of Portland cement, 10 parts of flyash, silica flour 10 Part, 8 parts of zeolite powder, 115 parts of sand, 125 parts of stone, 8 parts of tetraethyl orthosilicate, above-mentioned interior 10 parts of sealing compound, 1 part of water reducer are above-mentioned 5 parts of accelerator, 43 parts of water, above-mentioned raw materials are well mixed, and obtain rapid hardening gunite concrete.
Embodiment 4
A kind of rapid hardening gunite concrete and preparation method thereof, its preparation method includes：Interior sealing compound, its preparation method are prepared first Comprise the following steps：Interior sealing compound includes following parts by weight of raw materials：Porous 40 parts of silica aerogel, 5 parts of hydroxyethyl cellulose, grape 2 parts of sodium saccharate, 2 parts of hydroxypropyl starch ether, 2 parts of potassium phosphate, 20 parts of water, by hydroxyethyl cellulose, sodium gluconate, hydroxypropyl forms sediment Powder ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, add the well mixed standing of porous silica aerogel 3 hours afterwards, obtain Interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By the 20 parts of mixing of 70 parts of parts by weight aluminium vanadine and zinc oxide The ball milling in ball mill afterwards, Ball-milling Time 50 minutes, ball milling material is obtained, then 18 parts of aluminum phosphate, 7 parts of sodium hydroxide, sulfuric acid is sub- 10 parts of iron is mixed with above-mentioned ball milling material, obtains rapid hardening masterbatch, cellulose ether 4 will be added in 49 parts of the magnesium fluosilicate aqueous solution Part stirs to form mixed liquor, mixed liquor is added drop-wise in rapid hardening masterbatch with 3.5 ml/min rate of addition, Zhi Houjia Entering hexafluoro and close 8 parts of sodium aluminate, constant temperature stirs 12 minutes at 37 DEG C, obtains accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：130 parts of Portland cement, 10 parts of flyash, silica flour 9 Part, 5 parts of zeolite powder, 120 parts of sand, 120 parts of stone, 6 parts of tetraethyl orthosilicate, above-mentioned interior 25 parts of sealing compound, 3 parts of water reducer are above-mentioned 5 parts of accelerator, 45 parts of water, above-mentioned raw materials are well mixed, and obtain rapid hardening gunite concrete.

Claims (10)

1. a kind of rapid hardening gunite concrete, its preparation method include：Interior sealing compound is prepared first, and its preparation method includes following step Suddenly：Interior sealing compound includes following parts by weight of raw materials：Porous silica aerogel 30-40 parts, hydroxyethyl cellulose 3-5 parts, gluconic acid Sodium 2-3 parts, hydroxypropyl starch ether 1-3 parts, potassium phosphate 1-2 parts, water 10-20 parts, by hydroxyethyl cellulose, sodium gluconate, hydroxyl Propyl group starch ether, potassium phosphate and water mixing, and the water-bath at 40 DEG C, the well mixed standing 2-4 of porous silica aerogel is added afterwards Hour, obtain interior sealing compound；
Next prepares accelerator, and its preparation method comprises the following steps：By parts by weight aluminium vanadine 50-70 parts and zinc oxide 20-25 After part mixing in ball mill ball milling, Ball-milling Time 30-50 minutes, obtain ball milling material, then by aluminum phosphate 10-20 parts, hydroxide Sodium 5-10 parts, ferrous sulfate 2-10 parts are mixed with above-mentioned ball milling material, obtain rapid hardening masterbatch, by the magnesium fluosilicate aqueous solution Cellulose ether 3-10 parts are added in 40-50 parts to stir to form mixed liquor, and speed is added dropwise with 3-3.5 ml/mins in mixed liquor Degree is added drop-wise in rapid hardening masterbatch, is added hexafluoro afterwards and is closed sodium aluminate 5-8 parts, and constant temperature stirs 10-20 minutes at 30-40 DEG C, Obtain accelerator,
The raw material of last rapid hardening gunite concrete parts by weight includes：Portland cement 130-150 parts, flyash 10-15 parts, Silica flour 5-10 parts, zeolite powder 5-10 parts, sand 100-120 parts, stone 120-150 parts, tetraethyl orthosilicate 5-8 parts, above-mentioned interior maintenance Agent 10-25 parts, water reducer 1-3 parts, above-mentioned accelerator 4-6 parts, water 40-50 parts, above-mentioned raw materials are well mixed, obtain rapid hardening spray Penetrate concrete.
2. a kind of rapid hardening gunite concrete as claimed in claim 1, adds the well mixed standing of porous silica aerogel 3 hours.
3. a kind of rapid hardening gunite concrete as claimed in claim 1, the porosity of porous silica silica aerogel is 60- 70%, apparent density 0.4-0.45g/m3, specific surface area 400-500m2/g.
4. a kind of rapid hardening gunite concrete as claimed in claim 1, Ball-milling Time 40 minutes.
5. a kind of rapid hardening gunite concrete as claimed in claim 1, mixed liquor are added drop-wise to speed with 3 ml/min rate of addition In solidifying masterbatch.
6. a kind of rapid hardening gunite concrete as claimed in claim 1, constant temperature stirs 20 minutes at 40 DEG C.
7. a kind of rapid hardening gunite concrete as claimed in claim 1, the water reducer select polycarboxylate water-reducer.
8. a kind of rapid hardening gunite concrete as claimed in claim 1, the flyash select I grade of flyash.
9. a kind of rapid hardening gunite concrete as claimed in claim 1, the flyash select I grade of flyash.
10. a kind of rapid hardening gunite concrete as claimed in claim 1, the silica flour fineness is the mesh of 60 mesh -110.
CN201711216852.4A 2017-11-28 2017-11-28 A kind of rapid hardening gunite concrete Pending CN107721242A (en)

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Publication number Priority date Publication date Assignee Title
CN108821697A (en) * 2018-08-06 2018-11-16 吉林建筑大学 Curing concrete and preparation method thereof in a kind of water conservation Silica hydrogel
CN108821697B (en) * 2018-08-06 2020-10-27 吉林建筑大学 Water-retention silica gel internal curing concrete and preparation method thereof

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