CN108033751A - A kind of lime-fly ash aggregate base material and its preparation method and application - Google Patents
A kind of lime-fly ash aggregate base material and its preparation method and application Download PDFInfo
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- CN108033751A CN108033751A CN201711314998.2A CN201711314998A CN108033751A CN 108033751 A CN108033751 A CN 108033751A CN 201711314998 A CN201711314998 A CN 201711314998A CN 108033751 A CN108033751 A CN 108033751A
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- base material
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- aggregate base
- ash aggregate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—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 calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/346—Materials exhibiting reduced plastic shrinkage cracking
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of lime-fly ash aggregate base material, it is characterised in that in terms of mass fraction, its raw material includes：5~9 parts of lime, 12~21 parts of alpha semi-hydrated gypsum, 7~12 parts of flyash, 0.03~0.05 part of Quaternary Ammonium Resin, gather materials 80~90 parts.Application present invention also offers the preparation method of above-mentioned lime-fly ash aggregate base material and its in sub-surface.Two-ash broken stones shrinkage character can be mitigated using lime-fly ash aggregate base material provided by the invention and improve bending tensile strength, so as to avoid the reflection crack of bituminous paving, the service life of bituminous paving is improved, meets comfort, security and the economy run at high speed.
Description
Technical field
The present invention relates to semi-rigid base course material improving environment field, more specifically, it be related to one kind two ash it is broken
Ground mass layer material.
Background technology
In order to adapt to the needs of highway construction, Semi-rigid Road Base Course material is with its excellent working performance and significant warp
Ji benefit is widely applied in highway in China construction.China is completed the road surface of highway, and 95% or so is half firm
Property basic unit asphalt concrete pavement abbreviation semi-rigid pavement.Semi-rigid material refers to every various soil with stabilized with inorganic binder
When its intensity meets the requirements prescribed, it is referred to as semi-rigid material, it includes cement stabilized soil, lime stabilized soil, lime stabilization
Industrial residue and comprehensive stable soil.
It is a kind of widely used semi-rigid base course material that lime-flyash stabilization rubble, which is also referred to as two-ash broken stones,.Two ashes
Rubble can be regarded as the two-phase composite material formed that gathered materials by matrix phase lime, flyash and dispersed phase.Flyash is a kind of
The accessory substance in thermal power plant, is a kind of pozzolanic material, its main component is silica and aluminium oxide, submember be carbon and
Iron, calcium, magnesium and sulfur oxide.Under conditions of having lime and water, flyash can simultaneously generate gelling with calcium hydroxide reaction
Property material, it is then that rubble is cementing integral, make it have higher intensity and stability, lime-fly ash aggregate base has obvious
The hydraulicity, latent, plate body, but wearability is poor.Its intensity is formed except being influenced by material property and proportion of composing
Outside, it is also related with temperature and humidity.Since fly ash grain is hollow glass sphere, so its coefficient of shrinkage and temperature shrinkage system
Number is smaller than other semi-rigid materials, is of great significance to reducing warm plastic forming and desciccation crack.After two-ash broken stones shaping, intensity
Higher, water stability is good, and in highway engineering construction, it has the advantage that：A. intensity and various aspects of performance can ensure to drip
The quality requirement of blue or green coagulation upper layer or Portland Cement Concrete Surface Course；B. the quality of flyash readily satisfies requirement in two ashes；C. apply
Work is more convenient, and quality is relatively easy to control；D. durability is good, water stability is good, deformation is small；E. relative low price.Since two ashes are broken
Stone has the advantages that these, so its application prospect is very wide.
Although lime-flyash stabilized broken stone base has good pavement performance, due to lime, flyash, rubble and water
After mixing and stirring, being compacted, because hydration occurs inside evaporation and mixture, the moisture of mixture can be reduced constantly.Due to water
Reduce and the capillarity of generation, suction-operated, molecular separating force effect, volume contraction, i.e. drying shrinkage can be caused.In addition two are formed
Three phases of ash broken stones semi-rigid material, i.e., the result that solid phase, liquid phase water and gas phase interact in temperature-fall period, can also produce
Raw volume contraction, i.e. temperature shrinkage.Since the strength development of two-ash broken stones is slow, at the initial stage of its hardening, when drying shrinkage or temperature
When contracting is very big, the good semi-rigid type base of making is easy to produce crack, and more seriously this crack can also facilitate asphalt road
The surface layer in face forms reflection crack, so as to cause the reduction of semi-rigid asphalt pavement performance.In addition, two-ash broken stones mix
The bending tensile strength for closing material is significantly lower than its compression strength, according to the mechanical characteristic of semi-rigid material and to wheel load on road surface
In stress analysis, when the underlayment intensity under semi-rigid type base is smaller, the bottom surface of semi-rigid type base be often possible to by compared with
Big wheel load and cause larger tension, so as to cause curved drawing fatigue rupture, produce lime-flyash stabilized broken stone base
Crack, and then reduce its service life.
Have many semi-rigid pavements at present using only there is within 1 to 2 year early stage road surface infringement, cause it is larger direct or
Indirect economic loss, its main cause are that the appearance in a large amount of cracks of lime-fly ash aggregate base.
So dripped caused by order to mitigate the drying shrinkage due to lime-flyash stabilized broken stone base, temperature contracting and curved drawing fatigue rupture
The reflection crack on blue or green road surface, improves the service life of bituminous paving, meets comfort, security and the economy run at high speed,
Just it must improve and mitigate the shrinkage character of two-ash broken stones and improve bending tensile strength, so as to improve the semi-rigid base of two-ash broken stones
The performance of layer.
The content of the invention
The purpose of the present invention one is to provide a kind of lime-fly ash aggregate base material, its mitigate two-ash broken stones shrinkage character and
Bending tensile strength is improved, so as to avoid the reflection crack of bituminous paving, the service life of bituminous paving is improved, meets to run at high speed
Comfort, security and economy.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of lime-fly ash aggregate base material, in terms of mass fraction, its raw material includes：5~9 parts of lime, alpha semi-hydrated gypsum 12~21
Part, 7~12 parts of flyash, 0.03~0.05 part of Quaternary Ammonium Resin, gather materials 80~90 parts.
Preferably, the alpha semi-hydrated gypsum is prepared the present invention with the following method：Salting liquid is heated to 40 DEG C, will be added
Dihydrate gypsum is added in salting liquid after heat, is uniformly mixed, forms reaction slurry, the quality hundred of the dihydrate gypsum in reaction paste
It is 30~40% to divide specific concentration, and 4~5h is placed in constant temperature ageing, is warming up to 100~110 DEG C, is reacted 4~5h, after completion of the reaction, is taken advantage of
Reaction slurry is carried out separation of solid and liquid by heat, and the solid phase isolated wash with 95~100 DEG C of hot water, temperature be 65~75 DEG C,
Under conditions of vacuum is 0.05~0.1MPa, alpha semi-hydrated gypsum is obtained after vacuum drying；Wherein, the salting liquid is by flesh
The aqueous solution of alcohol sodium hexametaphosphate and sodium polyphosphate forms, and total salt quality percent concentration of salting liquid is 1~10%.
Preferably, the structural formula of the Quaternary Ammonium Resin is the present invention：
Wherein, a, b are the chain number of repetitive unit, and the average molecular weight of the Quaternary Ammonium Resin is 20,000,000~30,000,000.
Preferably, the ratio between a and b numerical value is 1 to the present invention:2~1:3.
The present invention preferably, it is described gather materials be 19~31.5mm including particle diameter prototype gradation cobble, particle diameter be 9.5~
The Black Warrior stone and particle diameter of 19mm be 0~9.5mm limestone aggregate chips, the prototype gradation cobble, Black Warrior stone and limestone aggregate chips
Weight ratio be 3~4：3~4：1~2；The lime is quick lime.
The purpose of the present invention two is to provide a kind of preparation method of lime-fly ash aggregate base material.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of preparation method of lime-fly ash aggregate base material, includes the following steps：
(1) lime and flyash are uniformly mixed；
(2) Quaternary Ammonium Resin and alpha semi-hydrated gypsum are uniformly mixed；
(3) mixture obtained by step (1) and the mixture obtained by step (2) are uniformly mixed；
(4) by the mixture obtained by step (3) and gather materials uniformly mixed, obtain lime-fly ash aggregate base material.
Preferably, in step (2), the alpha semi-hydrated gypsum is prepared the present invention with the following method：Heat salting liquid extremely
40 DEG C, dihydrate gypsum will be added in the salting liquid after heating, be uniformly mixed, form reaction slurry, two water stones in reaction paste
The mass percent concentration of cream is 30~40%, and 4~5h is placed in constant temperature ageing, is warming up to 100~110 DEG C, reacts 4~5h, instead
After answering, reaction slurry is subjected to separation of solid and liquid while hot, the solid phase isolated is washed with 95~100 DEG C of hot water, in temperature
Under conditions of being 0.05~0.1MPa for 65~75 DEG C, vacuum, alpha semi-hydrated gypsum is obtained after vacuum drying；Wherein, it is described
Salting liquid is made of the aqueous solution of sodium phytate and sodium polyphosphate, total salt quality percent concentration of salting liquid for 1~
10%.
Preferably, in step (2), the structural formula of the Quaternary Ammonium Resin is the present invention：Wherein, a, b be repetitive unit chain number, the quaternary ammonium
The average molecular weight of resin is 20,000,000~30,000,000；The ratio between a and b numerical value is 1:2~1:3.
The present invention preferably, in terms of mass fraction, in step (1) dosage of lime be 5~9 parts, fine coal in step (1)
Ash dosage be 7~12 parts, in step (2) dosage of Quaternary Ammonium Resin be 0.03~0.05 part, alpha semi-hydrated gypsum in step (2)
Dosage be 12~21 parts, the dosage gathered materials in step (3) be 80~90 parts.
The purpose of the present invention three is in the application in a kind of lime-fly ash aggregate base material of offer in sub-surface.
In conclusion the invention has the advantages that：
Firstth, the collaboration admixture of Quaternary Ammonium Resin and alpha semi-hydrated gypsum, adds the cleavage strength of lime-fly ash aggregate base material, carries
The high anti-freezing property of lime-fly ash aggregate base material, the compression rebound modulu and bending resistance for reducing lime-fly ash aggregate base material retract
Modulus is played, bending tensile strength is added, significantly improves the water coefficient of stability, reduce scour rate and backfin ratio, hence it is evident that reduce
The coefficient of shrinkage.It can be seen from the above that the present invention mitigates two-ash broken stones shrinkage character and improves bending tensile strength, so as to avoid asphalt road
The reflection crack in face, improves the service life of bituminous paving, meets comfort, security and the economy run at high speed.
Secondth, the present invention mitigates two-ash broken stones shrinkage character and improves bending tensile strength, so as to avoid bituminous paving
Reflection crack, improves the service life of bituminous paving, meets comfort, security and the economy run at high speed.
Brief description of the drawings
Fig. 1 is the preparation flow figure of Quaternary Ammonium Resin；
Fig. 2 is the infrared spectrum of styrene diethylene benzene copoly mer；
Fig. 3 is the infrared spectrum of primary aminated resin；
Fig. 4 is styrene diethylene benzene copoly mer1HNMR spectrograms；
Fig. 5 is primary aminated resin1HNMR spectrograms.
Embodiment
The present invention is described in further detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for the explanation present invention, rather than limitation of the present invention, to this hair under the concept thereof of the present invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
The preparation flow of Quaternary Ammonium Resin, as shown in Figure 1.
The specific preparation process of Quaternary Ammonium Resin includes the following steps：
The preparation of primary aminated resin：In the 250mL four-hole boiling flasks equipped with blender, condenser pipe and thermometer, protected in nitrogen
Under, under the conditions of existing for the quaternary ammonium type ionic liquid that 12.2g triethylamine hydrochlorides and 23.8g aluminum trichloride (anhydrous)s are formed, add
Enter 3g styrene diethylene benzene copoly mers and 40mL nitrobenzenes, be warming up to 130 DEG C, be gradually added 1, the 3- oxazines -2- of 12g
Ketone, and when reaction 24 is small at 1305 DEG C, cooling, takes out resin, ethanol washing, dry, obtains primary aminated resin.
The preparation of tertiary-aminated resin：In the 250mL four-hole boiling flasks equipped with blender, condenser pipe and thermometer, 3g is added
The mixing of primary aminated resin and 50mL ethanol, be gradually added dropwise afterwards formalin that 10mL mass percent concentrations are 37% and
10mL mass percent concentrations are the mixed liquor of 50% aqueous formic acid, when back flow reaction 5 is small after, take out resin, ethanol washes
Wash, is dry, that is, obtaining tertiary-aminated resin.
The preparation of Quaternary Ammonium Resin：The tertiary-aminated resins of 3g and 15mL bromoethanes is taken to add the stress reaction of inner liner polytetrafluoroethylene
In tank, after closed, when insulation 24 is small in 800 DEG C of air bath, resin, ethanol washing, drying, up to Quaternary Ammonium Resin are taken out.
According to Fig. 2 and Fig. 3, compared with styrene diethylene benzene copoly mer, the infrared spectrogram of primary aminated resin
In 3422cm-1There is strong absworption peak at place, is the stretching vibration peak of N-H.In addition, the infrared spectrogram of primary aminated resin is in 2924cm-1
And 1417cm-1Place's absworption peak is remarkably reinforced, and is C-H stretching vibrations.Illustrate to contain a variety of-CH in primary amine resin structure3With-
CH2Long carbon chain structure between-group, i.e. phenyl ring and nitrogen-atoms, infrared spectrum characterization the result shows that, the primary aminated resin of synthesis
It is consistent with object construction.
As shown in figure 4, the peak of δ 0.7~2.2 belongs to the hydrogen on styrene diethylene benzene copoly mer medium vinyl, δ
6.3~7.3 peak belongs to benzene ring hydrogen in styrene diethylene benzene copoly mer.Comparison diagram 4, as shown in Figure 5, newly goes out
The peak of existing δ 2.8 belongs to the H2 peaks in primary amine resin, and 3.2 peaks of δ belong to the H1 peaks in primary amine resin.The primary of generation at the same time
Relation between the various hydrogen signal peak areas of polyimide resin and its quantity is also basically identical with object construction.
The preparation embodiment 1 of alpha semi-hydrated gypsum
Salting liquid is heated to 40 DEG C, dihydrate gypsum will be added in the salting liquid after heating, is uniformly mixed, forms reaction slurry, instead
The mass percent concentration 35% of the dihydrate gypsum in slurry is answered, constant temperature ageing places 5h, is warming up to 110 DEG C, reacts 5h, reaction
After, reaction slurry is subjected to separation of solid and liquid while hot, the solid phase isolated is washed with 95 DEG C of hot water, temperature for 70 DEG C,
Under conditions of vacuum is 0.7MPa, alpha semi-hydrated gypsum sample one is obtained after vacuum drying；The salting liquid is by six phosphorus of inositol
The aqueous solution composition of sour sodium and sodium polyphosphate, the mass percent concentration of salting liquid mysoinositol sodium hexametaphosphate is 5%, salting liquid
The mass percent concentration of middle sodium polyphosphate is 5%.
The preparation embodiment 2 of alpha semi-hydrated gypsum
Salting liquid is heated to 40 DEG C, dihydrate gypsum will be added in the salting liquid after heating, is uniformly mixed, forms reaction slurry, instead
The mass percent concentration 40% of the dihydrate gypsum in slurry is answered, constant temperature ageing puts 4h, is warming up to 100 DEG C, reacts 4.5h, reaction
After, reaction slurry is subjected to separation of solid and liquid while hot, the solid phase isolated is washed with 100 DEG C of hot water, temperature for 75 DEG C,
Under conditions of vacuum is 1.0MPa, alpha semi-hydrated gypsum sample two is obtained after vacuum drying；The salting liquid is by six phosphorus of inositol
The aqueous solution composition of sour sodium and sodium polyphosphate, the mass percent concentration of salting liquid mysoinositol sodium hexametaphosphate is 0.5%, and salt is molten
The mass percent concentration of sodium polyphosphate is 0.5% in liquid.
The preparation embodiment 3 of alpha semi-hydrated gypsum
Salting liquid is heated to 40 DEG C, dihydrate gypsum will be added in the salting liquid after heating, is uniformly mixed, forms reaction slurry, instead
The mass percent concentration 30% of the dihydrate gypsum in slurry is answered, constant temperature ageing puts 4.5h, is warming up to 105 DEG C, reacts 4h, reaction
After, reaction slurry is subjected to separation of solid and liquid while hot, the solid phase isolated is washed with 98 DEG C of hot water, temperature for 65 DEG C,
Under conditions of vacuum is 0.5MPa, alpha semi-hydrated gypsum sample three is obtained after vacuum drying；The salting liquid is by six phosphorus of inositol
The aqueous solution composition of sour sodium and sodium polyphosphate, the mass percent concentration of salting liquid mysoinositol sodium hexametaphosphate is 2%, salting liquid
The mass percent concentration of middle sodium polyphosphate is 3%.
Component (the unit of 1 embodiment of table, 1 to 3 lime-fly ash aggregate base material：Kg)
The lime-fly ash aggregate base material of embodiment 1 to 3 is prepared using following steps：(1) lime and flyash are mixed equal
It is even；(2) Quaternary Ammonium Resin and water are uniformly mixed；(3) mixture obtained by step (1) and the mixture obtained by step (2) are mixed
Close uniform；(4) by the mixture obtained by step (3) and gather materials uniformly mixed, obtain lime-fly ash aggregate base material.
Comparative example 1
Difference lies in do not add Quaternary Ammonium Resin for comparative example 1 and embodiment 1.
Comparative example 2
Difference lies in do not add alpha semi-hydrated gypsum for comparative example 2 and embodiment 1.
Comparative example 3
Difference lies in alpha semi-hydrated gypsum sample one to be substituted for purchased from the limited public affairs of Beijing sea cowry Cisco skill for comparative example 3 and embodiment 1
The alpha semi-hydrated gypsum of department.
According to《Highway engineering stabilized with inorganic binder material experiment code》(JTJ057-1984) standard regulation, to reality
Apply example 1 to 3 and comparative example 1 to 3 carries out pavement performance test, result of the test is shown in Table 2.
Table 2
| Pilot project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Without side trace compression strength (28d)/MPa | 3.52 | 3.46 | 3.47 | 1.93 | 2.21 | 2.98 |
| Cleavage strength (28d)/MPa | 0.67 | 0.63 | 0.66 | 0.39 | 0.42 | 0.44 |
| Coefficient of frost resistance (30d)/% | 96.5 | 97.0 | 96.8 | 94.89 | 95.01 | 95.56 |
| Compression rebound modulu (28d)/MPa | 199 | 202 | 205 | 402 | 396 | 236 |
| Bending tensile strength (30d)/MPa | 0.678 | 0.695 | 0.685 | 0.401 | 0.420 | 0.435 |
| The modulus of resilience (40d)/MPa is drawn in bending resistance | 1235 | 1229 | 1230 | 1598 | 1424 | 1368 |
| Percentage of water loss (40d)/% | 2.52 | 2.35 | 2.47 | 10.21 | 7.85 | 3.45 |
| The water coefficient of stability/% | 97.6 | 96.2 | 97.0 | 85.67 | 87.88 | 90.1 |
| Scour rate (28d)/g/min | 4.587 | 4.550 | 4.576 | 5.857 | 6.252 | 5.232 |
| Backfin ratio (30d)/% | 3.53 | 3.69 | 3.55 | 6.48 | 6.58 | 4.18 |
| Average dry shrinkage coefficient/10-6/ % | 96 | 95 | 95 | 198 | 221 | 143 |
From table 2 it can be seen that the collaboration admixture of Quaternary Ammonium Resin and alpha semi-hydrated gypsum, adds splitting for lime-fly ash aggregate base material
Resistance to spalling, improves the anti-freezing property of lime-fly ash aggregate base material, reduces the compression rebound modulu of lime-fly ash aggregate base material
The modulus of resilience is drawn with bending resistance, bending tensile strength is added, significantly improves the water coefficient of stability, reduce scour rate and backfin ratio,
Significantly reduce the coefficient of shrinkage.It can be seen from the above that the present invention mitigates two-ash broken stones shrinkage character and improves bending tensile strength, so that
The reflection crack of bituminous paving is avoided, improves the service life of bituminous paving, meets comfort, security and the warp run at high speed
Ji property.
Claims (10)
1. a kind of lime-fly ash aggregate base material, it is characterised in that in terms of mass fraction, its raw material includes：5~9 parts of lime, α types
12~21 parts of semi-hydrated gypsum, 7~12 parts of flyash, 0.03~0.05 part of Quaternary Ammonium Resin, gather materials 80~90 parts.
2. a kind of lime-fly ash aggregate base material according to claim 1, it is characterised in that the alpha semi-hydrated gypsum uses
It is prepared by following method：Salting liquid is heated to 40 DEG C, dihydrate gypsum will be added in the salting liquid after heating, is uniformly mixed, is formed anti-
Answer slurry, the mass percent concentration of the dihydrate gypsum in reaction paste is 30~40%, and 4~5h, heating are placed in constant temperature ageing
To 100~110 DEG C, 4~5h is reacted, after completion of the reaction, reaction slurry is subjected to separation of solid and liquid while hot, with 95~100 DEG C of heat
The solid phase that water washing is isolated, under conditions of temperature is 65~75 DEG C, vacuum is 0.05~0.1MPa, after vacuum drying i.e.
Obtain alpha semi-hydrated gypsum；Wherein, the salting liquid is made of the aqueous solution of sodium phytate and sodium polyphosphate, salting liquid
Total salt quality percent concentration be 1~10%.
A kind of 3. lime-fly ash aggregate base material according to claim 1, it is characterised in that the structural formula of the Quaternary Ammonium Resin
For：Wherein, a, b are the chain number of repetitive unit, described
The average molecular weight of Quaternary Ammonium Resin is 20,000,000~30,000,000.
4. a kind of lime-fly ash aggregate base material according to claim 3, it is characterised in that the ratio between a and b numerical value is 1:2~
1:3。
A kind of 5. lime-fly ash aggregate base material according to claim 1, it is characterised in that it is described gather materials including particle diameter be 19
The limestone aggregate chips that the Black Warrior stone and particle diameter that prototype gradation cobble, the particle diameter of~31.5mm is 9.5~19mm are 0~9.5mm, institute
The weight ratio for stating prototype gradation cobble, Black Warrior stone and limestone aggregate chips is 3~4：3~4：1~2；The lime is quick lime.
6. a kind of preparation method of lime-fly ash aggregate base material, it is characterised in that include the following steps：
(1) lime and flyash are uniformly mixed；
(2) Quaternary Ammonium Resin and alpha semi-hydrated gypsum are uniformly mixed；
(3) mixture obtained by step (1) and the mixture obtained by step (2) are uniformly mixed；
(4) by the mixture obtained by step (3) and gather materials uniformly mixed, obtain lime-fly ash aggregate base material.
A kind of 7. preparation method of lime-fly ash aggregate base material according to claim 1, it is characterised in that in step (2),
The alpha semi-hydrated gypsum is prepared with the following method：Salting liquid is heated to 40 DEG C, two water stones will be added in the salting liquid after heating
Cream, is uniformly mixed, formation reaction slurry, and the mass percent concentration of the dihydrate gypsum in reaction paste is 30~40%, constant temperature
4~5h is placed in ageing, is warming up to 100~110 DEG C, reacts 4~5h, after completion of the reaction, reaction slurry is carried out solid-liquid point while hot
From, the solid phase isolated is washed with 95~100 DEG C of hot water, temperature be 65~75 DEG C, vacuum be 0.05~0.1MPa's
Under the conditions of, obtain alpha semi-hydrated gypsum after vacuum drying；Wherein, the salting liquid is by sodium phytate and sodium polyphosphate
Aqueous solution composition, total salt quality percent concentration of salting liquid is 1~10%.
A kind of 8. preparation method of lime-fly ash aggregate base material according to claim 1, it is characterised in that in step (2),
The structural formula of the Quaternary Ammonium Resin is：Wherein, a, b attach most importance to
The chain number of multiple unit, the average molecular weight of the Quaternary Ammonium Resin is 20,000,000~30,000,000；The ratio between a and b numerical value is 1:2~1:
3。
9. the preparation method of a kind of lime-fly ash aggregate base material according to claim 1, it is characterised in that with mass fraction
Meter, in step (1) dosage of lime be 5~9 parts, in step (1) dosage of flyash be 7~12 parts, quaternary ammonium tree in step (2)
The dosage of fat is 0.03~0.05 part, in step (2) dosage of alpha semi-hydrated gypsum be 12~21 parts, the use gathered materials in step (3)
Measure as 80~90 parts.
A kind of 10. application of the lime-fly ash aggregate base material in sub-surface as claimed in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711314998.2A CN108033751A (en) | 2017-12-09 | 2017-12-09 | A kind of lime-fly ash aggregate base material and its preparation method and application |
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| CN201711314998.2A CN108033751A (en) | 2017-12-09 | 2017-12-09 | A kind of lime-fly ash aggregate base material and its preparation method and application |
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| CN101386484A (en) * | 2008-10-09 | 2009-03-18 | 扬州大学 | Polypropylene fiber lime-fly ash aggregate base material and preparation method thereof |
| CA2908118A1 (en) * | 2013-04-30 | 2014-11-06 | Halliburton Energy Services, Inc. | Pumice-containing remedial compositions and methods of use |
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|---|---|---|---|---|
| CN101386484A (en) * | 2008-10-09 | 2009-03-18 | 扬州大学 | Polypropylene fiber lime-fly ash aggregate base material and preparation method thereof |
| CA2908118A1 (en) * | 2013-04-30 | 2014-11-06 | Halliburton Energy Services, Inc. | Pumice-containing remedial compositions and methods of use |
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| 孙家瑛: "废石膏改性二灰碎石基层的设计与施工工艺", 《中外公路》 * |
| 李秋忠: "树脂改性半刚性面层复合材料性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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