CN108298897A - A kind of cement and nano clay modified cut-back asphalt cold-repairing material - Google Patents
A kind of cement and nano clay modified cut-back asphalt cold-repairing material Download PDFInfo
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- CN108298897A CN108298897A CN201810013690.2A CN201810013690A CN108298897A CN 108298897 A CN108298897 A CN 108298897A CN 201810013690 A CN201810013690 A CN 201810013690A CN 108298897 A CN108298897 A CN 108298897A
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- Prior art keywords
- cement
- repairing material
- cut
- pitch
- back asphalt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of cement and nano clay modified cut-back asphalt cold-repairing materials, belong to asphalt pavement conserving field, and cut-back asphalt cold-repairing material of the present invention includes the component of following weight percentage：87.78% ~ 92.05% gather materials, 4.21% ~ 4.42% pitch, 1.05% ~ 1.10% diluent, 5.60% ~ 9.80% cement and 2.5% ~ 3.2% nanoclay, wherein it is described to gather materials for basalt, framework dense structure is formed with gap grading；The pitch is 70# matrix pitches；The diluent is diesel oil；The cement is Portland cement, and active high alkalinity is strong, with the carboxylic acid reaction in pitch, generates the stronger product of adhesiveness, large specific surface area increases structure pitch content；The nanoclay water absorbing capacity is strong, when moisture intrusion, expandable seal gap, and with cement hydration reaction occurs for the moisture absorbed, and moisture is prevented to continue to invade, and improves cold-repairing material water stability.Cut-back asphalt cold-repairing material produced by the present invention has higher frame strength, early strength and water stability.
Description
Technical field
The invention belongs to asphalt pavement conserving fields, and in particular to a kind of cement and nano clay modified cut-back asphalt are cold
Feed supplement.
Background technology
With China's rapid economic development, the volume of traffic constantly increases, and bituminous paving receives increasingly acid test.Drip
Green road surface is carried during long-time use by automobile shafts, day and night temperature variation, rain drop erosion, ageing of asphalt etc. it is various because
, often there are the various diseases such as pit slot, washboard, track, cracking in the influence of element.These diseases on road surface can influence the normal of road
It is current, the service level of bituminous paving is reduced, even causes traffic accident when serious.Therefore necessary road pavement disease carries out timely
Processing.
Currently, there are mainly two types of the filler materials that the diseases such as road pavement pit slot are repaired：Hot-mix asphalt mixture and dilution
Pitch cold-repairing material.Hot-mix asphalt mixture is Damages of Asphalt Road Surface part to be removed, further in accordance with " circular hole side's benefit " by on-site cutting
Principle, squarely will be cut at the pit slot of road surface, its internal waste residue is then removed, then adds the mixture of heat, be compacted
Open to traffic again after cooling.The pit slot damage location that hot-mix asphalt mixture is primarily adapted for use in road surface appearance is more concentrated and work
The larger situation of journey amount, when use, have the disadvantage that：1. low temperature season and rainy season can not use；2. needing skilled person's work and big
The special mixing apparatus of type；3. needing to mix and stir under the high temperature conditions, consuming energy is easy to cause ageing of asphalt and environmental pollution；
4. cannot store；5. needing close traffic for a period of time after repairing；6. small-scale pit repairing is easy waste material.
Cut-back asphalt cold-repairing material is to be mixed and stirred at normal temperatures using the cut-back asphalt of formulated with gathering materials, and manufactured one kind can
Pack storage at normal temperatures and construction, and be in loose condition (of surface) in repairing, influenced by season and weather it is smaller, it is convenient to satisfy the need in time
The asphalt that face is repaired, wherein cut-back asphalt is configured by a certain percentage by matrix pitch and diluent.Dilution
Pitch cold-repairing material is influenced smaller and excellent with quick, high-efficiency environment friendly etc. is repaired by natural causes such as construction environment and temperature
Point is therefore widely used in patch repair, but existing cold-repairing material still remains following disadvantage when in use：1. leading to
Frequently with the smaller open gradation of grain size, in order to repair pit slot of different shapes, but the smaller open gradation of grain size is difficult to form bone
Frame structure causes cold-repairing material intensity relatively low；2. due to the effect of solvent, cut-back asphalt can not almost provide cohesive force, cause dilute
It is very low to release pitch cold-repairing material early strength before solvent volatilizees completely, is easy to occur under Vehicle Load broken in early days
It is bad；3. water stability is poor, service life section, Moisture Damage is one of the main reason for causing road surface pit slot, and therefore, good water is steady
Qualitative is one of prerequisite condition of cold-repairing material.
Invention content
Low for existing cut-back asphalt cold-repairing material early strength, the problem of water stability difference, the present invention provides a kind of water
Mud and nano clay modified cut-back asphalt cold-repairing material have higher frame strength, early strength and water stability.
In order to achieve the above objectives, the present invention provides the following technical solutions：
(1) a kind of cement and nano clay modified cut-back asphalt cold-repairing material, include the component of following weight percentage：
Gather materials：87.78%~92.05%
Pitch：4.21%~4.42%
Diluent：1.05%~1.10%
Cement：5.60%~9.80%
Nanoclay：2.5%~3.2%
(2) gathering materials for basalt described in, gradation composition is shown in Table 1, and framework dense structure is formed with gap grading.
1 cold-repairing material gradation composition of table
(3) pitch described in is 70# matrix pitches.
(4) diluent described in is diesel oil.
(5) cement described in is Portland cement.
(6) nanoclay physical parameter and chemical composition described in are shown in Table 2 and table 3.
The physical parameter of 2 nanoclay of table
The chemical composition of 3 nanoclay of table
The beneficial effects of the invention are as follows：
The present invention provides a kind of cement and nano clay modified cut-back asphalt cold-repairing materials, compared with other cold-repairing materials,
With following advantageous effects：
(1) present invention forms framework dense structure using the higher basalt of mechanical strength as gathering materials with gap grading,
Enough guarantees are provided for the intensity requirement of cold-repairing material；
(2) present invention improves the early strength and water stability of cold-repairing material using cement and nanoclay, matches in cold-repairing material
The cement of doses is added during setting and nanoclay is sufficiently stirred, cement and shape of the nanoclay mutually to wrap up
Formula is present in surface of aggregate；Cement is a kind of basic matterial that activity is very high, not only has the condition as miberal powder, and cement
In C3S (tricalcium silicate), C2After the resolution of S (dicalcium silicate) and water, PH can reach 12, and the PH of general limestone dust
Only 9, after the hydroxy acid in the alkaline components and pitch in cement reacts, the product of formation has stronger adsorptivity
Energy；Since cement possesses than miberal powder the specific surface area of bigger, the ratio shared by structure pitch in mixture can be increased, make pitch
It is improved with the adhesiveness gathered materials, forms stable framework dense structure inside asphalt or make asphalt mastic between aggregate
Cohesive force becomes strong, therefore can improve the early strength of cold-repairing material.
(3) nanoclay that the present invention uses has extremely strong water absorbing capacity, when encountering moisture intrusion, nanoclay energy
The enough moisture for absorbing invasion, volume expansion plug the gap, and reduce moisture to pitch contact with gathering materials；And what nanoclay absorbed
Hydration reaction occurs for moisture and cement, and moisture is on the one hand prevented to continue to invade, on the other hand can compensate between aggregate particle by
The loss of strength caused by moisture intrusion improves the water stability of cold-repairing material.
Description of the drawings
Fig. 1 is the configuration flow figure of cut-back asphalt cold-repairing material.
Fig. 2 is the change schematic diagram during cut-back asphalt cold-repairing material health.
Specific implementation mode
To further illustrate the present invention disclosed technical solution, the present invention is made with specific implementation case below in conjunction with the accompanying drawings
It is further elucidated above.
A kind of cement of the present invention and nano clay modified cut-back asphalt cold-repairing material, it includes following step to make
Suddenly：
(1) mineral aggregate is configured according to gradation composition, is put into 120 DEG C of thermostatic drying chamber heat preservation 4h；The weight percentage is taken to be
87.78%~92.05% gather materials, is poured into and mixes and stirs pot, mixes and stirs pot temperature equally control at 120 DEG C；
(2) it is respectively 5.60%~9.80% and 2.5%~3.2% cement and nanoclay to take weight percentage,
It is uniformly mixed, pours into and mix and stir pot, mixing time 60s；
(3) configuration of cut-back asphalt：By 70# matrix pitch heating and meltings, temperature is controlled at 120 DEG C or so；Take weight hundred
It is 4.21%~4.42% pitch to divide content, and the diesel oil that weight percentage is 1.05%~1.10% is added, is sufficiently stirred
Uniformly, cut-back asphalt is obtained.It pours into and mixes and stirs pot, mix and stir 60s.
(4) the miberal powder ingredient in mineral aggregate is added, mixes and stirs 60s.
Embodiment 1：
The preparation method of cement and nano clay modified cut-back asphalt cold-repairing material is as follows in the present embodiment：
(1) mineral aggregate is configured according to gradation composition, is put into 120 DEG C of thermostatic drying chamber heat preservation 4h；The weight percentage is taken to be
92.04% gather materials, is poured into and mixes and stirs pot, mixes and stirs pot temperature equally control at 120 DEG C；
(2) it is respectively 5.60% and 2.5% cement and nanoclay to take weight percentage, is uniformly mixed, pours into and mix
And pot, mixing time 60s；
(3) configuration of cut-back asphalt：By 70# matrix pitch heating and meltings, temperature is controlled at 120 DEG C or so；Take weight hundred
It is 4.42% pitch to divide content, and the diesel oil that weight percentage is 1.10% is added, stirs, and obtains dilution and drips
It is green.It pours into and mixes and stirs pot, mix and stir 60s；
(4) the miberal powder ingredient in mineral aggregate is added, mixes and stirs 60s.
Embodiment 2：
The preparation method of cement and nano clay modified cut-back asphalt cold-repairing material is as follows in the present embodiment：
(1) mineral aggregate is configured according to gradation composition, is put into 120 DEG C of thermostatic drying chamber heat preservation 4h；The weight percentage is taken to be
89.76% gather materials, is poured into and mixes and stirs pot, mixes and stirs pot temperature equally control at 120 DEG C；
(2) it is respectively 6.20% and 2.9% cement and nanoclay to take weight percentage, is uniformly mixed, pours into and mix
And pot, mixing time 60s；
(3) configuration of cut-back asphalt：By 70# matrix pitch heating and meltings, temperature is controlled at 120 DEG C or so；Take weight hundred
It is 4.30% pitch to divide content, and the diesel oil that weight percentage is 1.08% is added, stirs, and obtains dilution and drips
It is green.It pours into and mixes and stirs pot, mix and stir 60s；
(4) the miberal powder ingredient in mineral aggregate is added, mixes and stirs 60s.
Embodiment 3：
The preparation method of cement and nano clay modified cut-back asphalt cold-repairing material is as follows in the present embodiment：
(1) mineral aggregate is configured according to gradation composition, is put into 120 DEG C of thermostatic drying chamber heat preservation 4h；The weight percentage is taken to be
87.79% gather materials, is poured into and mixes and stirs pot, mixes and stirs pot temperature equally control at 120 DEG C；
(2) it is respectively 9.80% and 3.2% cement and nanoclay to take weight percentage, is uniformly mixed, pours into and mix
And pot, mixing time 60s；
(3) configuration of cut-back asphalt：By 70# matrix pitch heating and meltings, temperature is controlled at 120 DEG C or so；Take weight hundred
It is 4.21% pitch to divide content, and the diesel oil that weight percentage is 1.05% is added, stirs, and obtains dilution and drips
It is green.It pours into and mixes and stirs pot, mix and stir 60s；
(4) the miberal powder ingredient in mineral aggregate is added, mixes and stirs 60s.
In order to evaluate the early strength and water stability of cut-back asphalt cold-repairing material made from Examples 1 to 3, carry out to get down from horse
Xie Er stability tests and indirect tensile test on frozen-thaw, and be compared with comparative example：
With reference to《Standard specification for construction and acceptance of highway asphalt pavement (JTG F40-2004)》Method, weigh mixture 1180g and exist
It is fitted into die trial under room temperature, it is two-sided respectively to hit 75 times real, the cold-repairing material test specimen respectively making 12 of each example, wherein 4 test specimens exist
Health 6h is directly demoulded at room temperature, the early stage Marshall stability for measuring test specimen, to evaluate the early strength of cold-repairing material；Separately
Outer 8 test specimens place 12h at normal temperatures together with die trial in such a way that side is erect, and are then supported in 60 DEG C of thermostatic drying chambers
It is raw to be demoulded again together with die trial health 12h at room temperature after taking-up for 24 hours, it is cold to evaluate for carrying out indirect tensile test on frozen-thaw
The water stability of feed supplement；Tensile splitting strength and freeze-thaw split intensity ratio are calculated as follows：
RT=0.006287Pt/h
In formula, RTFor test specimen tensile splitting strength (MPa), PtFor the maximum value (N) of the finder charge of test specimen, the examination of h test specimens
Part height (mm).
TSR=RT2/RT1×100
In formula, TSR is freeze-thaw split intensity ratio (%), RT2For the tensile splitting strength (MPa) of non-Frozen-thawed cycled test specimen,
RT1For the tensile splitting strength (MPa) of test specimen after Frozen-thawed cycled.
Testing result is shown in Table 3.
Table 3
The early stage Marshall stability minimum standard of cut-back asphalt cold-repairing material is 1.5kN, of the invention three embodiments
Early strength is all higher than minimum standard, but also more than the early strength of comparative example；Freeze-thaw split intensity than minimum standard be
70%, the intensity ratio of of the invention three embodiments is all higher than minimum standard, is more than the intensity ratio of comparative example, even more than initially
Intensity.In conclusion cement produced by the present invention and nano clay modified cut-back asphalt mixture have significant early stage strong
Degree is high, the good advantage of water stability.
Finally it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although ginseng
It is described the invention in detail according to above-described embodiment, but it will be understood by those of ordinary skill in the art that：It still can be right
The present invention modifies or converts on an equal basis, and modification or part without departing from the spirit and scope of the present invention are replaced, and should all be covered
The present invention claims interest field among.
Claims (6)
1. a kind of cement and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：Including following weight percentage
Component：
Gather materials：87.78%~92.05%
Pitch：4.21%~4.42%
Diluent：1.05%~1.10%
Cement：5.60%~9.80%
Nanoclay：2.5%~3.2%%.
2. according to a kind of cement of claim 1 and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：The collection
Material is basalt, and framework dense structure is formed with gap grading.
3. according to a kind of cement of claim 1 and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：The drip
Blueness is 70# matrix pitches.
4. according to a kind of cement of claim 1 and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：Described is dilute
It is diesel oil to release agent.
5. according to a kind of cement of claim 1 and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：The water
Mud is Portland cement.
6. the preparation method of a kind of cement and nano clay modified cut-back asphalt cold-repairing material, it is characterised in that：Including walking as follows
Suddenly：
（1）Mineral aggregate is configured according to gradation composition, is put into 120 DEG C of thermostatic drying chamber heat preservation 4h；Take weight percentage be 87.78% ~
92.05% gather materials, is poured into and mixes and stirs pot, mixes and stirs pot temperature equally control at 120 DEG C；
（2）It is respectively 5.60% ~ 9.80% and 2.5% ~ 3.2%% cement and nanoclay to take weight percentage, is uniformly mixed,
It pours into and mixes and stirs pot, mixing time 60s；
（3）The configuration of cut-back asphalt：By 70# matrix pitch heating and meltings, temperature is controlled at 120 DEG C or so；Weight percent is taken to contain
Amount is 4.21% ~ 4.42% pitch, and the diesel oil that weight percentage is 1.05% ~ 1.10% is added, stirs, obtains dilute
Release pitch；It pours into and mixes and stirs pot, mix and stir 60s；
（4）The miberal powder ingredient in mineral aggregate is added, mixes and stirs 60s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013690.2A CN108298897A (en) | 2018-01-08 | 2018-01-08 | A kind of cement and nano clay modified cut-back asphalt cold-repairing material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013690.2A CN108298897A (en) | 2018-01-08 | 2018-01-08 | A kind of cement and nano clay modified cut-back asphalt cold-repairing material |
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| Publication Number | Publication Date |
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| CN108298897A true CN108298897A (en) | 2018-07-20 |
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ID=62868676
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|---|---|---|---|
| CN201810013690.2A Pending CN108298897A (en) | 2018-01-08 | 2018-01-08 | A kind of cement and nano clay modified cut-back asphalt cold-repairing material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160787A (en) * | 2018-09-29 | 2019-01-08 | 东南大学 | A kind of porous permeable environment-friendly type cut-back asphalt cold-repairing material and preparation method thereof |
| CN115650637A (en) * | 2022-09-27 | 2023-01-31 | 浙江师范大学 | Reactive cold-repairing asphalt mixture and preparation method thereof |
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| CN106746928A (en) * | 2016-12-30 | 2017-05-31 | 周益铭 | A kind of preparation method of asphalt pavement pit cold-repairing material |
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| KR100813164B1 (en) * | 2007-09-05 | 2008-03-17 | 한국휴로드 (주) | Waterpermeable asphalt concrete with high durability and the method of manufacturing thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109160787B (en) * | 2018-09-29 | 2021-04-06 | 东南大学 | Porous water-permeable environment-friendly diluted asphalt cold-patch material and preparation method thereof |
| CN115650637A (en) * | 2022-09-27 | 2023-01-31 | 浙江师范大学 | Reactive cold-repairing asphalt mixture and preparation method thereof |
| CN115650637B (en) * | 2022-09-27 | 2024-01-30 | 浙江师范大学 | Reactive cold repair asphalt mixture and preparation method thereof |
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