CN104609814A - Anti-aqueous dispersion synchronous grouting material with large specific gravity and low consistence - Google Patents
Anti-aqueous dispersion synchronous grouting material with large specific gravity and low consistence Download PDFInfo
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- CN104609814A CN104609814A CN201410814078.7A CN201410814078A CN104609814A CN 104609814 A CN104609814 A CN 104609814A CN 201410814078 A CN201410814078 A CN 201410814078A CN 104609814 A CN104609814 A CN 104609814A
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- 239000000463 material Substances 0.000 title claims abstract description 97
- 230000001360 synchronised Effects 0.000 title claims abstract description 51
- 239000006185 dispersion Substances 0.000 title claims abstract description 36
- 230000005484 gravity Effects 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000004576 sand Substances 0.000 claims abstract description 70
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000003638 reducing agent Substances 0.000 claims abstract description 26
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 45
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 26
- 239000010881 fly ash Substances 0.000 claims description 26
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 22
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- 235000011941 Tilia x europaea Nutrition 0.000 claims description 22
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- 239000002994 raw material Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 9
- PUSNGFYSTWMJSK-GSZQVNRLSA-N (2R,3R,4S,5R,6R)-2,3,4-trimethoxy-6-(methoxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxyoxane;1-[[(2R,3R,4S,5R,6S)-3,4,5-tris(2-hydroxypropoxy)-6-[(2R,3R,4S,5R,6R)-4,5,6-tris(2-hydroxypropoxy)-2-(2-hydroxypropoxymethyl)oxan- Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](OC)O[C@@H]1COC.CC(O)CO[C@@H]1[C@@H](OCC(C)O)[C@H](OCC(C)O)[C@@H](COCC(O)C)O[C@H]1O[C@H]1[C@H](OCC(C)O)[C@@H](OCC(C)O)[C@H](OCC(C)O)O[C@@H]1COCC(C)O PUSNGFYSTWMJSK-GSZQVNRLSA-N 0.000 claims description 8
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- 238000007580 dry-mixing Methods 0.000 claims description 3
- 238000011068 load Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005304 joining Methods 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims 1
- 238000011049 filling Methods 0.000 abstract description 3
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- 229910052602 gypsum Inorganic materials 0.000 abstract description 3
- 239000010440 gypsum Substances 0.000 abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 3
- 239000011574 phosphorus Substances 0.000 abstract 3
- 239000010883 coal ash Substances 0.000 abstract 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- HWKQNAWCHQMZHK-UHFFFAOYSA-N Trolnitrate Chemical compound [O-][N+](=O)OCCN(CCO[N+]([O-])=O)CCO[N+]([O-])=O HWKQNAWCHQMZHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 abstract 1
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 abstract 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 1
- 235000011116 calcium hydroxide Nutrition 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000002562 thickening agent Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 25
- 238000010276 construction Methods 0.000 description 10
- 238000011056 performance test Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 206010018987 Haemorrhage Diseases 0.000 description 6
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- 230000000694 effects Effects 0.000 description 5
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
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- 238000010998 test method Methods 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 229910018626 Al(OH) Inorganic materials 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000005204 segregation Methods 0.000 description 2
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- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910018516 Al—O Inorganic materials 0.000 description 1
- 206010002855 Anxiety Diseases 0.000 description 1
- 206010057666 Anxiety disease Diseases 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N Bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N Calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N Diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- AUZONCFQVSMFAP-UHFFFAOYSA-N Disulfiram Chemical compound CCN(CC)C(=S)SSC(=S)N(CC)CC AUZONCFQVSMFAP-UHFFFAOYSA-N 0.000 description 1
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 229910002800 Si–O–Al Inorganic materials 0.000 description 1
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- -1 aluminum ions Chemical class 0.000 description 1
- SMYKVLBUSSNXMV-UHFFFAOYSA-J aluminum;tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-J 0.000 description 1
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- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an anti-aqueous dispersion synchronous grouting material with large specific gravity and low consistence. The anti-aqueous dispersion synchronous grouting material consists of the following components in parts by weight: 100 parts of coal ash, 10-30 parts of slaked lime, 5-20 parts of cement, 10-50 parts of phosphorus gypsum, 0-200 parts of machine-made sand, 200-400 parts of shield mud and sand, 0.1-0.5 part of a water reducing agent, 0.05-0.2 part of a thickening agent and 80-120 parts of water. The shield mud and sand is used for replacing river sand and bentonite in a traditional grouting material, and the shield mud and sand and machine-made sand are taken as fine aggregates, so that the problem of resource shortage for natural sand is solved; moreover, the coal ash discharged at a power station and the phosphorus gypsum produced at a phosphorus chemical plant are reasonably utilized, so that the resource utilization of industrial waste is realized. The grouting material has the characteristics of good filling property, long castable time, large specific gravity, low consistence, anti-aqueous dispersion performance, segment floating prevention and the like, is prominent in environmental protection performance and low in cost, and can be widely applied to the shield segment grouting engineering and the like.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of large proportion low denseness water resistant dispersion synchronous grouting material and preparation method thereof.
Background technology
Synchronous grouting is the important process in tunneling shield construction, and playing the effect of " controlling tunnel duct piece to float, reduce land subsidence, ensure Stability Analysis of Structures ", is requisite link in tunnel driving.But the existence of common synchronization injecting paste material is not easily uniformly filled in around section of jurisdiction, water resistant bad dispersibility, the easily problem such as segregation, layering under high-pressure water-enriched condition, affect the property noted of slurry, intensity and weather resistance, and easily flow to bottom section of jurisdiction and cause section of jurisdiction vault void to fill out, float, effectively can not control the problems such as ground settlement.
In tunneling shield construction tunneling process, excavate out a large amount of silt (shield structure digging sand).These shield structure digging sands not only take workyard, difficult treatment, and directly can affect construction speed, and become constructing tunnel and environment protection one bears greatly.How shield structure digging sand is carried out rationalizing recycling and will become the emphasis of future tunnel construction.In recent years, answer demand and the construction scale expanding day of various Infrastructure, the demand such as concrete, mortar increases severely, and accounts for the Aggregate consumption of volume 70% in sustainable growth, and existing natural sand resource is difficult to ensure China's infrastructure construction.The natural sand resource in many areas is closely exhausted, and also have a lot of place to start taboo and adopt or limit and adopt natural sand, the imbalance between supply and demand of engineering sand becomes increasingly conspicuous, and certain areas even can be used without natural sand, directly affect engineering progress.The appearance of Machine-made Sand not only can solve the problem of river sand scarcity, reduces construction costs, can also realize its mechanization production, be controlled in ideal range by all technical.Therefore, Machine-made Sand is more easy to control than natural sand quality.The research and apply of Machine-made Sand replacement river sand becomes further important for this reason.
In addition, the phosphogypsum that China discharges every year, the quantity of flyash equal industrial residue occupy the first in the world, these waste residues not only occupied ground, difficult treatment, and easily cause pollution to air, underground water and edatope, be the Important Problems that numerous scholars put forth effort to solve to the process of these industrial residues always.
Summary of the invention
The object of this invention is to provide a kind of large proportion low denseness water resistant dispersion synchronous grouting material, this slurry has that density is large, consistometric value is low, water resistant dispersion and prevent the features such as duct piece float upward, and the preparation method related to is simple, effectively can solve traditional river sand resource nervous, and the recycling problem of the industrial residue such as flyash, phosphogypsum.
For achieving the above object, the technical solution used in the present invention is:
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, be made up of the component of following portions by weight: 100 parts, flyash, phosphogypsum 10 ~ 50 parts, cement 5 ~ 20 parts, white lime 10 ~ 30 parts, shield structure silt particle 200 ~ 400 parts, Machine-made Sand 0 ~ 200, water reducer 0.1 ~ 0.5 part, thickening material 0.05 ~ 0.2 part, 80 ~ 120 parts, water.
In such scheme, each component parts by weight are: 100 parts, flyash, phosphogypsum 20 ~ 40 parts, cement 5 ~ 10 parts, white lime 15 ~ 30 parts, shield structure silt particle 200 ~ 400 parts, Machine-made Sand 100 ~ 200 parts, water reducer 0.1 ~ 0.3 part, thickening material 0.1 ~ 0.2 part, 90 ~ 120 parts, water.
In such scheme, described flyash is II level ash, and its Blain specific surface is greater than 350m
2/ kg.
In such scheme, described phosphogypsum is the waste residue that phosphatization workshop is discharged, and its purity is not less than 95wt%, SO
3content is 35 ~ 40wt%, P
2o
5content is less than 2.14wt%, and its Blain specific surface is greater than 350m
2/ kg.
In such scheme, described cement is P.O42.5 ordinary Portland cement, and its Blain specific surface is greater than 350m
2/ kg.
In such scheme, the measuring method of described Blain specific surface carries out according to GB/T 8074-2008 " Method of determination for specific surface of cement Bo Shi method ".
In such scheme, described white lime is technical grade white powder, and purity is greater than 98%.
In such scheme, described shield structure silt particle silt content is 5 ~ 20wt%, sand content > 70wt%, and its fineness modulus is 1.6 ~ 2.3.
In such scheme, described Machine-made Sand is cobble breaking type, and content of stone powder is less than 4%, and its fineness modulus is 2.3 ~ 3.0, and apparent density is greater than 2650kg/m
3.
In such scheme, described water reducer is the anti-chamotte mould polycarboxylic acid series high efficiency water reducing agent of VIVID-500 (C), its water-reducing rate >20%.
In such scheme, described thickening material is Natvosol (HEC) or Vltra tears (HPMC), and its molecular weight is not less than 100,000.
The preparation method of above-mentioned a kind of large proportion low denseness water resistant dispersion synchronous grouting material, described synchronous grouting material is made up of the component of following parts by weight: 100 parts, flyash, phosphogypsum 10 ~ 50 parts, cement 5 ~ 20 parts, white lime 10 ~ 30 parts, shield structure silt particle 200 ~ 400 parts, Machine-made Sand 0 ~ 200 part, water reducer 0.1 ~ 0.5 part, thickening material 0.05 ~ 0.2 part, 80 ~ 120 parts, water, its preparation method comprises the following steps:
1) raw material is taken by the weight proportion of each component;
2) by load weighted white lime, flyash, phosphogypsum, cement, Machine-made Sand and thickening material mixing and stirring, then add shield structure silt particle, dry mixing 1 ~ 2 minute, obtains dry blend together;
3) be added to the water by water reducer and stir, then joining in the dry blend of step (2) gained, remix stirs 2 ~ 3 minutes, obtains described large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material.
In such scheme, shield structure silt particle needs the test first carrying out water ratio before use, then dries the mensuration of carrying out silt content, sand content; Need the size of the water ratio according to silt particle in preparation process, regulate the amount of water in proportioning.
According to such scheme, its slump > 20mm of obtained large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material, degree of mobilization > 200mm, denseness < 11cm, bleeding rate < 0.5%, density > 2.0g/cm
3, 7d ultimate compression strength>=1MPa, 28d intensity>=strength ratio>=0.90,1.5MPa, 28d land and water, can effectively water resistant disperse and prevent duct piece float upward, meet the performance requriements of shielded construction to slurry.
Principle of the present invention is:
1) in described large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material, the hydration process of gelling material is as follows: cement, after meeting water, hydration reaction occurs, and generates C-S-H gel, Ca (OH)
2deng, cement provides OH together with white lime
-; And the main component of phosphogypsum is original state dihydrate gypsum, SO can be provided
4 2-; At OH
-with SO
4 2-exciting under, the activated alumina in flyash and silicon oxide disintegrate, Si-O key and Al-O bond rupture, formation ettringite and activated presoma, and its reaction equation is:
CaO+Al
2O
3+3(CaSO
4·2H
2O)+2Ca(OH)
2+24H
2O→
3CaO·Al
2O
3·3CaSO
4·32H
2O
3+Si-O-Si
3++6OH
-→2[SiO(OH)
3]
-
3+Al-O-Al
3++8OH
-→2[Al(OH)
4]
-
3+Si-O-Al
3++7OH
-→[SiO(OH)
3]
-+[Al(OH)
4]
-
[SiO (OH) after destructing
3]
-with [Al (OH)
4]
-can be on the increase, with the free Ca in slurries
2+reaction bonded generates the hydrated product of hydrated calcium silicate, drated calcium aluminate and three-dimensional sal structure.The constantly intertexture adhesion polymerization of hydrated product in gelling material, the network structure that final formation is closely unordered.In described network structure formation process, there will be Al
3+replace Si
4+phenomenon, make aluminum ions paripheral zone negative charge, in order to balance negative charge, positively charged Na
+, K
+, Ca
2+can be filled in the passage of gel Deng alkali ion, thus obtain metastable gel structure, generate and there is erodible good class zeolite material (Na, the Ca)-Si-Al-H of water resistant; Under the gluing filling effect of the zeolite structured skeleton function of ettringite, class and C-S-H, C-A-S-H etc., the final hardened paste forming compact structure.
2) adopt shield structure silt particle to replace river sand in traditional injecting paste material and bentonitic principle as follows:
The main component of shield structure silt particle is fine sand and shale clay, and test the silt content 5 ~ 20wt% of silt particle used, sand content is greater than 70wt%, and fineness modulus is 1.6 ~ 2.3.Shale component concentration in shield structure silt particle is larger, and water absorption and swelling is better, can reduce the amount of free water, increases viscosity, reduce mobility.It has columnar structure simultaneously, surface is containing a large amount of active groups (" OH " and " Si-O "), there are water-absorbent, thixotropy, swelling property etc., after mixing, the viscosity of slurry increases, and hinders particles sink, card room structure can be formed after its hydrolysis, make a large amount of free water change irreducible water in card room structure into, and then improve cohesiveness, water-retentivity and stability, prevent the appearance of stifled pump, plugging phenomenon.The fineness modulus of the chiltern composition in shield structure silt particle is 1.6 ~ 2.3, and median size, greatly about about 0.3mm, compared with the fine sand in Machine-made Sand, can very be applicable to the fine aggregate done in synchronous grouting material.Can obtain thus, the shale composition in shield structure silt particle has bentonitic effectiveness, and chiltern composition is the same with the fine sand in the sand of common river, therefore can use the Machine-made Sand in shield structure silt particle replacement conventional synchronization injecting paste material and wilkinite.
3) water resistant dispersion mechanism is as follows:
Thickening material hydroxyethyl ether cellulose (HEC) or Vltra tears (HPMC) are the water-soluble high-molecular compounds with backbone and stronger adsorptive power.Cement, flyash, phosphogypsum particle and fine aggregate etc. can be attached together by it, improve the intergranular cohesion of synchronous grouting material; And the hydroxyl on long-chain and the Sauerstoffatom on ehter bond and associated water molecules form hydrogen bond, part free-water is " freedom " no longer, causes solution retrogradation; Mutually can be wound around between cellulose ether chain simultaneously, form three-dimensional net structure, thus greatly improve the viscosity of synchronous grouting material and water resistant washes ability, improve the parcel of slurry, homogeneity, improve its anticol sand separation, bleeding segregation ability; In addition, shield structure silt particle surface is containing a large amount of active groups, there is water-absorbent, thixotropy, swelling property, can with the high polymer long chain commissure IPN of thickening material, the water resistant dispersiveness of further raising slurry and stability, and the stone flour in Machine-made Sand also has the water suction viscosifying action of shale component in shield structure silt particle, therefore this slurry can under high-pressure water-enriched environment, fill up space between section of jurisdiction and soil layer packed uniform, and do not occur glue, glue sand separation phenomenon.
4) prevent duct piece float upward mechanism as follows:
Because injecting paste material mainly works to fill space, prevents ground settlement and makes the overall uniform stressed in section of jurisdiction, thus not high to its requirement of strength.For cost-saving and extend the usable time of slurry, general gelling material especially cement consumption is less, and the time of coagulation of slurry is greater than 20h.This research, by controlling denseness and degree of mobilization, is avoided the injecting paste material injected from grouting hole to flow under gravity bottom section of jurisdiction, is formed larger buoyancy and make duct piece float upward; Simultaneously because the great denseness of ratio of slurry is low, cohesiveness is strong, between gelling material, gelling material and fine aggregate, fine aggregate, mutual rubbing effect is obvious, slurry is made to have larger shear yield strength, distortion to a certain degree can be resisted, before improving slurry hardens further, prevent duct piece float upward ability.Subsequently, cement, white lime, flyash and phosphogypsum system hydration and hardening and produce intensity, non-deformability is improved again, prevents tunnel duct piece from floating further.
In addition, for ensureing that injecting paste material is when the low denseness of large proportion, still there is the good performance noted and suitably improve its intensity, the present invention mixes appropriate anti-chamotte mould polycarboxylic acid series high efficiency water reducing agent in injecting paste material, this water reducer effectively can overcome ordinary water-reducing agent and is subject to shale absorption and weakens the shortcoming of diminishing usefulness, improves the serviceability of slurry well.When the silt content of shield structure silt particle used is less, suitably can improves the volume of thickening material and reduce the consumption of water, ensureing low denseness; But the amount of shield structure silt particle can be reduced when silt content is larger and increase Machine-made Sand consumption, increasing the friction shear resisting ability between sand grains, before making slurry hardens, having enough shear yield strengths to carry out resistance to deformation.
Compared with prior art, beneficial effect of the present invention is:
1) the present invention is by shield structure silt particle water ratio, silt content and the isoparametric research of sand content, selects the shield structure silt particle index parameter scope being suitable for preparing synchronous grouting material; And rationally application shield structure silt particle and Machine-made Sand make fine aggregate, by the time of coagulation after the ratio control sizing material forming of adjustment flyash, white lime, phosphogypsum and cement and intensity; By regulating cement mortar rate, silt particle Machine-made Sand than the sand content controlling slurry, density, denseness and shear yield strength, make slurry can rely on viscosity and the resistance to shear opposing distortion to a certain degree of slurry self upon hardening; By the volume of regulating capacity, anti-chamotte mould polycarboxylic acid series high efficiency water reducing agent and thickening material, the serviceability of further control slurry, denseness and intensity, make that slurry possesses the good fillibility noted, water resistant is dispersed, impervious, water resistant is erodible and prevent the ability of duct piece float upward, thus adapt to different construction conditions to the requirement of size performance.
2) ratio of synchronous grouting material of the present invention is great: density can reach 2.06g/cm
3; Denseness is low: consistometric value < 11cm; The property noted is good, usable time is long: initial flow degree > 200mm, time of coagulation > 20h; Bleeding rate is little: bleeding rate < 0.5%; Water resistant dispersing property is excellent: the equal > 90% of 28d land and water strength ratio; 7d ultimate compression strength > 1MPa, 28d ultimate compression strength > 1.5MPa, can prevent duct piece float upward effectively, meets the performance requriements of shielded construction to injecting paste material.
3) large proportion of the present invention low denseness water resistant dispersion synchronous grouting material, in its bonding component, the incorporation of flyash, phosphogypsum is greater than 70wt%, and adopt shield structure silt particle and Machine-made Sand as fine aggregate, effectively can solve the problem of traditional river sand resource anxiety.Owing to reasonably make use of the phosphogypsum that produces in the flyash of power station discharge and phosphatization workshop production process, achieve the recycling of trade waste, and the use of the silt particle excavated in shielded construction process and Machine-made Sand decreases digging of river sand adopts, meet the requirement of the strategy of sustainable development.
4) preparation method that the present invention relates to is simple, and raw material is simple and easy to get, obtained injecting paste material excellent combination property, and environmental-protecting performance is outstanding, cost is low, can be good at the requirement meeting site operation, has significant economic benefit and social benefit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In following examples, described flyash is II level ash, and Blain specific surface is greater than 350m
2/ kg;
Described phosphogypsum is the waste residue that phosphatization workshop is discharged, and its purity is not less than 95wt%, SO
3content is 37.5wt%, P
2o
5content is less than 2.14wt%, and its Blain specific surface is greater than 350m
2/ kg;
Described cement is P.O42.5 ordinary Portland cement, and its Blain specific surface is greater than 350m
2/ kg;
Described white lime is technical grade white powder, and purity is greater than 95%;
Described Machine-made Sand is cobble breaking type, and content of stone powder is 3.4%, and its fineness modulus is 2.8, and apparent density is 2718kg/m
3;
Described water reducer is the anti-chamotte mould polycarboxylic acid series high efficiency water reducing agent of VIVID-500 (C) type.
The preparation method of described large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material comprises the following steps: 1) take each raw material by proportioning raw materials; 2) load weighted white lime, flyash, phosphogypsum, cement, Machine-made Sand and thickening material are added in stirrer and mix, then add shield structure silt particle, dry mixing is after 2 minutes together, obtains dry blend; 3) be added to the water by water reducer and stir, adding in dry blend together, mix and blend obtains described large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material for 3 minutes, should keep Keep agitation when gained injecting paste material stores, stand-by at any time.
The performance test methods of the large proportion low denseness water resistant dispersion synchronous grouting material that following examples obtain is as follows:
1) mensuration of mechanical property: ultimate compression strength is carried out with reference to GB177-85 " strength of cement mortar detection method ";
2) test of flowing property: slump test method is undertaken by GB/T_2419-2005 " Test method for fluidity of cement mortar ", the slump for after slurries are loaded in mould plugging and pounding and vertically mention, the height loss recorded;
3) test of bleeding rate: the mensuration of bleeding rate is carried out with reference to GB/T3183-1997 " masonry cement ";
4) test of density: the quality m measuring fixed volume glass cylinder
1, measure the gross weight m after filling slurry
2, with the quality (m of slurry
2-m
1) density of slurry is divided by the volume of glass cylinder;
5) test of denseness and time of coagulation: undertaken by JGJ70-90 " building slurries fundamental property test method ";
6) test of water resistant dispersing property: carry out with reference to DL/T5177-2000 " non-dispersible underwater concrete Experimental Procedures ".
Embodiment 1
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 40 parts, cement 5 parts, white lime 20 parts, shield structure silt particle 300 parts, Machine-made Sand 100 parts, water reducer 0.2 part, thickening material 0.1 part, 110 parts, water.
Described shield structure silt particle water ratio 4.6%, silt content 12.6wt%, sand content 86.2wt%, its fineness modulus is 1.8; Described thickening material is Vltra tears (HPMC), and its molecular weight is 200,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 2
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 35 parts, cement 20 parts, white lime 10 parts, shield structure silt particle 400 parts, Machine-made Sand 0 part, water reducer 0.5 part, thickening material 0.05 part, 110 parts, water.
Described white lime is technical grade white powder, and purity is greater than 98%.Described shield structure silt particle water ratio 4.6%, silt content 12.6wt%, sand content 86.2wt%, its fineness modulus is 1.8; Described thickening material is Vltra tears (HPMC), and its molecular weight is 200,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 3
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 50 parts, cement 5 parts, white lime 10 parts, shield structure silt particle 200 parts, Machine-made Sand 200 parts, water reducer 0.2 part, thickening material 0.1 part, 100 parts, water.
Described shield structure silt particle water ratio 5.3%, silt content 20wt%, sand content 79.1wt%, its fineness modulus is 1.6; Described thickening material is Vltra tears (HPMC), and its molecular weight is 200,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 4
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 10 parts, cement 15 parts, white lime 30 parts, shield structure silt particle 200 parts, Machine-made Sand 200 parts, water reducer 0.2 part, thickening material 0.1 part, 100 parts, water.
Described shield structure silt particle water ratio 5.3%, silt content 20wt%, sand content 79.1wt%, its fineness modulus is 1.6; Described thickening material is Natvosol (HEC), and its molecular weight is 100,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 5
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 20 parts, cement 10 parts, white lime 30 parts, shield structure silt particle 400 parts, Machine-made Sand 0 part, water reducer 0.5 part, thickening material 0.05 part, 80 parts, water.
Described shield structure silt particle water ratio 4.2%, silt content 5wt%, sand content 93.6wt%, its fineness modulus is 1.9; Described thickening material is Natvosol (HEC), and its molecular weight is 200,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 6
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 30 parts, cement 15 parts, white lime 20 parts, shield structure silt particle 300 parts, Machine-made Sand 100 parts, water reducer 0.1 part, thickening material 0.2 part, 120 parts, water.
Described shield structure silt particle water ratio 4.8%, silt content 15.7wt%, sand content 83.2wt%, its fineness modulus is 1.8; Described thickening material is Vltra tears (HPMC), and its molecular weight is 100,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
Embodiment 7
A kind of large proportion low denseness water resistant dispersion synchronous grouting material, is made up of the component of following portions by weight:
100 parts, flyash, phosphogypsum 30 parts, cement 10 parts, white lime 20 parts, shield structure silt particle 300 parts, Machine-made Sand 100 parts, water reducer 0.3 part, thickening material 0.2 part, 90 parts, water.
Described shield structure silt particle water ratio 4.4%, silt content 8.5wt%, sand content 90.2wt%, its fineness modulus is 1.9; Described thickening material is Vltra tears (HPMC), and its molecular weight is 100,000.
The proportioning raw materials of the large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material described in the present embodiment is as shown in table 1, and the performance test results is in table 2.
The proportioning raw materials (parts by weight) of synchronous grouting material described in table 1 embodiment 1 ~ 7
The performance test results of synchronous grouting material described in table 2 embodiment 1 ~ 7
Table 2 illustrates that synchronous grouting material prepared by method of the present invention has than the feature such as great, denseness is little, and degree of mobilization is good, and usable time is long, water resistant dispersion.Gained synchronous grouting material can play well and prevent slip casting tunnel duct piece floating, reduces land subsidence, waterproof, make tunnel duct piece uniform stressed, ensures constitutionally stable effect.
The bound value that the present invention is raw materials used and interval value can realize the present invention, then this just not illustrative example one by one.And above-described embodiment is only for the example done clearly is described, the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, and these changes or variation are still within the protection domain of the invention.
Claims (9)
1. a large proportion low denseness water resistant dispersion synchronous grouting material, be made up of the component of following parts by weight: 100 parts, flyash, phosphogypsum 10 ~ 50 parts, cement 5 ~ 20 parts, white lime 10 ~ 30 parts, shield structure silt particle 200 ~ 400 parts, Machine-made Sand 0 ~ 200 part, water reducer 0.1 ~ 0.5 part, thickening material 0.05 ~ 0.2 part, 80 ~ 120 parts, water.
2. synchronous grouting material according to claim 1, is characterized in that, described flyash is II level ash, and its Blain specific surface is greater than 350m
2/ kg.
3. synchronous grouting material according to claim 1, is characterized in that, described phosphogypsum is the waste residue that phosphatization workshop is discharged, SO
3content is 35 ~ 40wt%, P
2o
5content is less than 2.14wt%, and its Blain specific surface is greater than 350m
2/ kg.
4. synchronous grouting material according to claim 1, is characterized in that, described cement is 42.5 grades of ordinary Portland cements, and its Blain specific surface is greater than 350m
2/ kg; Described white lime is technical grade white powder, and purity is greater than 95%.
5. synchronous grouting material according to claim 1, is characterized in that, described shield structure silt particle silt content is 5 ~ 20wt%, sand content > 70wt%, and fineness modulus is 1.6 ~ 2.3.
6. synchronous grouting material according to claim 1, is characterized in that, described Machine-made Sand is cobble breaking type, and content of stone powder is less than 4%, and its fineness modulus is 2.3 ~ 3.0, and apparent density is greater than 2650kg/m
3.
7. synchronous grouting material according to claim 1, is characterized in that, described water reducer is anti-chamotte mould polycarboxylic acid series high efficiency water reducing agent, its water-reducing rate >20%.
8. synchronous grouting material according to claim 1, is characterized in that, described thickening material is Natvosol (HEC) or Vltra tears (HPMC), and its molecular weight is not less than 100,000.
9. the preparation method of the low denseness water resistant dispersion of the large proportion according to any one of claim 1 ~ 8 synchronous grouting material, it is characterized in that, described synchronous grouting material is made up of the component of following parts by weight: 100 parts, flyash, phosphogypsum 10 ~ 50 parts, cement 5 ~ 20 parts, white lime 10 ~ 30 parts, shield structure silt particle 200 ~ 400 parts, Machine-made Sand 0 ~ 200 part, water reducer 0.1 ~ 0.5 part, thickening material 0.05 ~ 0.2 part, 80 ~ 120 parts, water, its preparation method comprises the following steps:
1) raw material is taken by the weight proportion of each component;
2) by load weighted white lime, flyash, phosphogypsum, cement, Machine-made Sand and thickening material mixing and stirring, then add shield structure silt particle, dry mixing 1 ~ 2 minute, obtains dry blend together;
3) be added to the water by water reducer and stir, then joining in the dry blend of step (2) gained, remix stirs 2 ~ 3 minutes, obtains described large proportion low denseness water resistant dispersion environment-friendly type synchronous grouting material.
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