CN105505307A - Medium-temperature modified crack pouring adhesive and preparation method thereof - Google Patents
Medium-temperature modified crack pouring adhesive and preparation method thereof Download PDFInfo
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- CN105505307A CN105505307A CN201610079651.3A CN201610079651A CN105505307A CN 105505307 A CN105505307 A CN 105505307A CN 201610079651 A CN201610079651 A CN 201610079651A CN 105505307 A CN105505307 A CN 105505307A
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- base joint
- joint grouting
- grouting glue
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a medium-temperature modified crack pouring adhesive and a preparation method thereof. A formula of the medium-temperature modified crack pouring adhesive comprises 80-90 parts of matrix asphalt, 3-7 parts of crack pouring adhesive modifier and 3-17 parts of rubber powder, wherein the matrix asphalt is a medium-temperature modified asphalt with a high solid content, and is composed of the following components in parts by weight: 75-82 parts of matrix petroleum asphalt, 3-7 parts of medium-temperature modifier and 11-22 parts of water. A medium-temperature modified crack pouring adhesive product prepared with the method has a curing effect significantly higher than that of a conventional crack pouring adhesive, can be cured in 1-2 hours, can significantly shorten the time duration of road closure caused by construction, and is conducive to easing the traffic pressure, thereby meeting needs of people. The medium-temperature modified crack pouring adhesive prepared with the method has a wider range of construction temperature and can be constructed under a climatic condition of 0-10 DEG C. However, a modified asphalt in the prior art cannot be constructed at a construction temperature below 10 DEG C, by comparison, the number of days for construction can be extended by 60 days, thereby meeting needs of road maintenance.
Description
Technical field
The present invention relates to the technology of preparing of the pitch in field of road, refer to warm modification base joint grouting glue in one particularly, the invention still further relates to the preparation method of this middle temperature modification base joint grouting glue.
Background technology
Along with the construction and development of China's high road in recent years, bituminous pavement is more and more subject to the favor of people, is the primary structure form of Chinese Highway and urban road surfaces.But asphalt roads use process in owing to standing the comprehensive action of car load and physical environment for a long time, Asphalt Pavement Cracking is caused to produce crack, the existence in crack not only affects comfortableness and the security of driving, and road table rainwater is gone down to the grass-roots units by crack, also will greatly weaken the strength and stability of roadbed, make bituminous pavement be subject to more serious destruction, usually bring inconvenience to driving, substantially reduce the working life of road, accelerate the destruction on road surface.In whole highway maintenance work, the key link of maintenance of surface room highway maintenance action, the breakage of seam class is that the dominance of bituminous pavement damages mode, is the day-to-day work of asphalt pavement conserving to the repairing of asphalt pavement crack; Highway is responsible for heavy traffic flow, and under normal circumstances once occur that crack should not suspend traffic for a long time or compress current section to repair, novel material, the novel method of studying crack repairing targetedly have positive effect.
At present, the repairing technique of asphalt pavement crack is also relatively backward, generally adopts modifying asphalt base joint grouting glue patching and emulsification asphalt grouting patching fracture to carry out repairing treatment both at home and abroad.But the low temperature bonding power between existing crack patching material and old pasta is lower, low temperature flexibility and weather resistance poor, easily occur that when road surface low-temperature shrink patching material and old pavement are peeled off to come off, regenerate crack, particularly in very cold, area that ultraviolet is strong, the crack of bituminous pavement needs to repair every year; Then also there is the problem that price is high, preparation of construction is complicated, executive cost is higher in same kind of products at abroad.Also there is same problem in emulsification asphalt grouting patching material.Therefore, develop a kind of low temperature unit elongation large, high with old pavement cohesive strength, ageing-resistant modified high-molecular colloid material is repaired for solution China asphalt pavement crack has important using value and promotional value.
Existing base joint grouting glue main raw material(s) adds ointment, coal tar, terra alba, quadrol, benzene etc. in pitch to make.Because the construction Heating temperature of pitch is generally more than 160 DEG C, when causing the construction of base joint grouting glue like this, temperature is also higher.So also affect the solidification of the base joint grouting glue in later stage simultaneously.After asphalt temperature drops to temperature from 160 DEG C, base joint grouting glue could solidify.Therefore higher construction temperature also often affects set time.The solidification process of base joint grouting glue is general also comparatively slow, and the solidification duration needed for it is also relevant with temperature, and the higher solidification of temperature is faster.
Now conventional base joint grouting glue perviousness is poor, fragility is larger, taste excitatory, has larger harm to operating personnel and environment, the poor-performing of high and low temperature, ductility is lower, often its 5 DEG C of ductilities only reach 20cm, can not satisfy the demand completely, also affect the speed that is open to traffic simultaneously.
How to prevent when constructing ageing of asphalt from being the difficult problem that those skilled in the art generally acknowledge and the direction of making great efforts exploration always, but there is no the appearance of gratifying technical scheme up to now.
Summary of the invention
In order to solve the above-mentioned drawback occurred in existing asphalt production and construction, the first object of the present invention will provide warm modification base joint grouting glue in one exactly, it is become by following components in mass portion array: 80 ~ 90 parts of matrix pitches, 3 ~ 7 parts of base joint grouting glue properties-correcting agent, 3 ~ 17 parts of rubber powders.
In technique scheme, described matrix pitch is high solids content modification mid-temperature pitch, is become: 75 ~ 82 parts of matrix petroleum pitch: warm properties-correcting agent in 3 ~ 7 parts, 11 ~ 22 parts of water by following components in mass portion array.
Described middle temperature properties-correcting agent is become by following components in mass portion array:
5 ~ 10 part of 18/16 tertiary amine;
5 ~ 12 parts of cationic additives, described cationic additive is selected from the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-and trimethyl lauryl ammonium chloride;
1 ~ 5 part of methyl alcohol;
The emulsifying agent of 40 ~ 50 parts, described emulsifying agent is selected from styrene-butadiene-styrene, styrene-butadiene rubber(SBR), polyethylene, acrylonitrile-butadiene-styrene copolymer, superpolymer polypropylene and polystyrene;
1 ~ 3 part of calcium chloride;
5 ~ 20 parts of deionized waters.
In technique scheme, described base joint grouting glue properties-correcting agent is become by following components in mass portion array: styrene-butadiene-styrene and styrene butadiene rubbers mix with the ratio of 3:2.
In technique scheme, 200 ~ 250 orders selected by described rubber powder.
In technique scheme, softening temperature >=84 DEG C of this base joint grouting glue; 5 DEG C of ductility >=83 ㎝; Penetration degree is at least 5.3mm; Recovery of elasticity at 25 DEG C is no less than 91%.
The method of the middle temperature modification base joint grouting glue described in preparation, comprises the steps:
1) high solids content modification mid-temperature pitch is produced
1.1) by the components dissolved than water of middle temperature properties-correcting agent in being no less than in the deionized water of 60 DEG C, and fully to mix;
1.2) matrix petroleum pitch is heated to more than 150 DEG C;
1.3) by step 1.1) maintain the temperature at 75 DEG C ~ 95 DEG C after the middle temperature properties-correcting agent that obtains and matrix petroleum pitch and water mixing, stir;
1.4) 90 DEG C time, when the viscosity of the modification mid-temperature pitch that mixing generates reaches 3Pas, asphalt production terminates;
2) in step 1) add rubber powder and properties-correcting agent in obtained high solids content modification mid-temperature pitch, mixed by high-speed shearing machine, the obtained intermediates mixed
3) adopt thermal dehydration equipment by step 2) the obtained intermediates mixed dewater at the temperature of 110 DEG C ~ 130 DEG C, the water content of product lower than 1%, warm modification base joint grouting glue in namely obtained.
In technique scheme, step 2) in, the velocity of shear of shears is 1000r/h, and shear time is no less than 1h, and the temperature of shearing controls at 110 DEG C ~ 130 DEG C.
The middle temperature modification base joint grouting glue product utilizing the present invention to produce, mainly utilize the not easily aging performance of modification mid-temperature pitch, the properties-correcting agent that this pitch can mix with SBR and SBR simultaneously well merges, 5 DEG C of ductilities can reach more than 80cm from the 50cm of routine, and elastic recovery properties can reach more than 90%.And this base joint grouting glue does not add the compositions such as ointment, coal tar, quadrol, benzene, nonirritant taste, is conducive to environmental protection and workmen is healthy.
The middle temperature modification base joint grouting glue product utilizing the present invention to produce, solidification effect is apparently higher than conventional base joint grouting glue, and 1 ~ 2h just can solidify.The time span that the road surface that can cause owing to constructing is closed obviously shortens, and is conducive to alleviating traffic pressure, meets the needs of the people.
The construction temperature scope of the middle temperature modification base joint grouting glue using the present invention to produce is wider, can construct under the weather condition of 0 DEG C ~ 10 DEG C.And prior art modifying asphalt construction temperature can not lower than 10 DEG C of constructions, construction days annual by contrast can extend 60 days, meets the demand of road maintenance.
Embodiment
Below in conjunction with specific embodiment, equipment and process of the present invention is described in further detail.
The present invention devises formula of a kind of middle temperature modification base joint grouting glue and preparation method thereof, the engineering time of the routine of base joint grouting glue can be dropped to 1 ~ 2h from 3 ~ 4h, effectively raise operating efficiency, save a large amount of time and human and material resources, financial resources.
In this, warm modification base joint grouting glue is become by following components in mass portion array: 80 ~ 90 parts of matrix pitches, 3 ~ 7 parts of base joint grouting glue properties-correcting agent, 3 ~ 17 parts of rubber powders.
Described matrix pitch is high solids content modification mid-temperature pitch, is become: 75 ~ 82 parts of matrix petroleum pitch: warm properties-correcting agent in 3 ~ 7 parts, 11 ~ 22 parts of water by following components in mass portion array.
Described middle temperature properties-correcting agent is become by following components in mass portion array:
5 ~ 10 part of 18/16 tertiary amine;
5 ~ 12 parts of cationic additives, described cationic additive is selected from the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-and trimethyl lauryl ammonium chloride;
1 ~ 5 part of methyl alcohol;
The emulsifying agent of 40 ~ 50 parts, described emulsifying agent is selected from styrene-butadiene-styrene, styrene-butadiene rubber(SBR), polyethylene, acrylonitrile-butadiene-styrene copolymer, superpolymer polypropylene and polystyrene;
1 ~ 3 part of calcium chloride;
5 ~ 20 parts of deionized waters.
Described matrix pitch is the matrix petroleum pitch of solid content more than 75%.All ingredients in above-mentioned formula all can directly chemically preparation supplier locate purchase and obtain.
5 DEG C of ductilities of the evaporation residue of this high solids content modification mid-temperature pitch are no less than 56.1cm; The softening temperature of evaporation residue is 85 ~ 97 DEG C; The penetration degree of evaporation residue is 58 ~ 66 (0.1mm).The drop temperature of the compound that this pitch is made is no more than 120 DEG C.Other technologies index all meets industry specifications " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) and Hubei Province's local regulation " high solids content oil-in-water type mid-temperature pitch pavement technique code " (DB42/T1045-2015).
Described base joint grouting glue properties-correcting agent is become by following components in mass portion array: styrene-butadiene-styrene (SBS) and styrene butadiene rubbers (SBR) mix with the ratio of 3:2.
200 ~ 250 orders selected by described rubber powder.The cost performance of 200 object rubber powders is higher.Rubber powder order number is the bigger the better comparatively speaking, because the order number size major effect base joint grouting glue mixing uniformity of rubber powder, the rubber powder of large order number is finer and smoother, stir evenly.
Concrete, relatively low for modification mid-temperature pitch content in the component of the base joint grouting glue of cement pavement, be no more than 85 parts; Mass concrete base joint grouting glue is similar to cement concrete pavement base joint grouting glue, and the modification mid-temperature pitch content contained by its base joint grouting glue is at 80 parts.
The existing drawback of packing material of mass concrete movement joint is packing material poor permeability, with concrete binding weak effect, is difficult to mass concrete movement joint and fills completely and the requirement be connected.
During solution particular problem of the present invention, adopt the modification mid-temperature pitch of about 80 parts as matrix pitch, the joint sealant viscosity of production is low, has good perviousness, can meet the requirement that mass concrete movement joint is filled.
In this, the preparation method of warm modification base joint grouting glue comprises the steps:
1) high solids content modification mid-temperature pitch is produced
1.1) by the components dissolved than water of middle temperature properties-correcting agent in being no less than in the deionized water of 60 DEG C, and fully to mix;
1.2) matrix petroleum pitch is heated to more than 150 DEG C;
1.3) by step 1.1) maintain the temperature at 75 DEG C ~ 95 DEG C after the middle temperature properties-correcting agent that obtains and matrix petroleum pitch and water mixing, stir;
1.4) 90 DEG C time, when the viscosity of the modification mid-temperature pitch that mixing generates reaches 3Pas, asphalt production terminates;
2) in step 1) add rubber powder and properties-correcting agent in obtained high solids content modification mid-temperature pitch, mixed by high-speed shearing machine, the obtained intermediates mixed
Velocity of shear is 1000r/h, and shear time is no less than 1h, and the temperature of shearing controls at 110 DEG C ~ 130 DEG C;
After at least 1h high-speed shearing machine mixes, rubber powder and pitch stir usually, without particulate state admixture in product.
3) adopt thermal dehydration equipment by step 2) the obtained intermediates mixed dewater at the temperature of 110 DEG C ~ 130 DEG C, the water content of product lower than 1%, warm modification base joint grouting glue in namely obtained.
Different component formula, adopts above-mentioned same production stage, and its performance of producing the middle temperature modification base joint grouting glue obtained is as following table 1: the performance index of the middle temperature modification base joint grouting glue of different components:
Table 1: the performance index of the middle temperature modification base joint grouting glue of different components
Softening temperature >=84 DEG C of middle temperature modification base joint grouting glue prepared by the present invention; 5 DEG C of ductility >=83 ㎝; Penetration degree (25 DEG C, 100g, 5s) is at least 53 (0.1mm); Recovery of elasticity (25 DEG C) is no less than 91%.Existing joint sealant mainly adopts modifying asphalt, and other the key technical indexes is also by the requirement of pitch design asphalt.
The base joint grouting glue that now conventional modifying asphalt is produced, the property indices of the base joint grouting glue that the modifying asphalt that such as No. 70 A level pitch is produced using SBS as properties-correcting agent is produced is as follows: 5 DEG C of ductilities are no less than 50cm; Softening temperature >=45 DEG C; Penetration degree (25 DEG C, 100g, 5s) > 3mm, recovery of elasticity (25 DEG C) is not less than 55%.
The middle temperature modification base joint grouting glue product utilizing the present invention to produce, mainly utilize the not easily aging performance of modification mid-temperature pitch, the properties-correcting agent that this pitch can mix with SBR and SBR simultaneously well merges, 5 DEG C of ductilities can reach more than 80cm from the 50cm of routine, and elastic recovery properties can reach more than 90%.And this base joint grouting glue does not add the compositions such as ointment, coal tar, quadrol, benzene, nonirritant taste, is conducive to environmental protection and workmen is healthy.
The middle temperature modification base joint grouting glue product utilizing the present invention to produce, solidification effect is apparently higher than conventional base joint grouting glue, and 1 ~ 2h just can solidify.The time span that the road surface that can cause owing to constructing is closed obviously shortens, and is conducive to alleviating traffic pressure, meets the needs of the people.
The construction temperature scope of the middle temperature modification base joint grouting glue using the present invention to produce is wider, can construct under the weather condition of 0 DEG C ~ 10 DEG C.And prior art modifying asphalt construction temperature can not lower than 10 DEG C of constructions, construction days annual by contrast can extend 60 days, meets the demand of road maintenance.
Claims (7)
1. a warm modification base joint grouting glue in, is characterized in that: become by following components in mass portion array: 80 ~ 90 parts of matrix pitches, 3 ~ 7 parts of base joint grouting glue properties-correcting agent, 3 ~ 17 parts of rubber powders.
2. middle temperature modification base joint grouting glue according to claim 1, it is characterized in that: described matrix pitch is high solids content modification mid-temperature pitch, become by following components in mass portion array: 75 ~ 82 parts of matrix petroleum pitch: warm properties-correcting agent in 3 ~ 7 parts, 11 ~ 22 parts of water;
Described middle temperature properties-correcting agent is become by following components in mass portion array:
5 ~ 10 part of 18/16 tertiary amine;
5 ~ 12 parts of cationic additives, described cationic additive is selected from the chloro-2-hydroxypropyl-trimethyl ammonium chloride of 3-and trimethyl lauryl ammonium chloride;
1 ~ 5 part of methyl alcohol;
The emulsifying agent of 40 ~ 50 parts, described emulsifying agent is selected from styrene-butadiene-styrene, styrene-butadiene rubber(SBR), polyethylene, acrylonitrile-butadiene-styrene copolymer, superpolymer polypropylene and polystyrene;
1 ~ 3 part of calcium chloride;
5 ~ 20 parts of deionized waters.
3. middle temperature modification base joint grouting glue according to claim 1, is characterized in that: described base joint grouting glue properties-correcting agent is become by following components in mass portion array: styrene-butadiene-styrene and styrene butadiene rubbers mix with the ratio of 3:2.
4. middle temperature modification base joint grouting glue according to claim 1, is characterized in that: 200 ~ 250 orders selected by described rubber powder.
5. middle temperature modification base joint grouting glue according to claim 4, is characterized in that: softening temperature >=84 DEG C of this base joint grouting glue; 5 DEG C of ductility >=83 ㎝; Penetration degree is at least 5.3mm; Recovery of elasticity at 25 DEG C is no less than 91%.
6. the preparation method of the middle temperature modification base joint grouting glue according to any one of the claims 1 ~ 5, is characterized in that: comprise the steps:
1) high solids content modification mid-temperature pitch is produced
1.1) by the components dissolved than water of middle temperature properties-correcting agent in being no less than in the deionized water of 60 DEG C, and fully to mix;
1.2) matrix petroleum pitch is heated to more than 150 DEG C;
1.3) by step 1.1) maintain the temperature at 75 DEG C ~ 95 DEG C after the middle temperature properties-correcting agent that obtains and matrix petroleum pitch and water mixing, stir;
1.4) 90 DEG C time, when the viscosity of the modification mid-temperature pitch that mixing generates reaches 3Pas, asphalt production terminates;
2) in step 1) add rubber powder and properties-correcting agent in obtained high solids content modification mid-temperature pitch, mixed by high-speed shearing machine, the obtained intermediates mixed
3) adopt thermal dehydration equipment by step 2) the obtained intermediates mixed dewater at the temperature of 110 DEG C ~ 130 DEG C, the water content of product lower than 1%, warm modification base joint grouting glue in namely obtained.
7. the preparation method of middle temperature modification base joint grouting glue according to claim 6, is characterized in that: step 2) in, the velocity of shear of shears is 1000r/h, and shear time is no less than 1h, and the temperature of shearing controls at 110 DEG C ~ 130 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610079651.3A CN105505307B (en) | 2016-02-04 | 2016-02-04 | Medium temperature is modified base joint grouting glue and preparation method thereof |
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| CN201610079651.3A CN105505307B (en) | 2016-02-04 | 2016-02-04 | Medium temperature is modified base joint grouting glue and preparation method thereof |
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| CN105505307B CN105505307B (en) | 2018-01-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528058A (en) * | 2021-06-16 | 2021-10-22 | 山西博润交通科学工程有限公司 | Desulfurized gypsum powder-based pavement water-based crack pouring adhesive and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113848A (en) * | 2013-01-21 | 2013-05-22 | 江苏博特新材料有限公司 | Environment-friendly intermediate-temperature pavement pouring glue and preparation method thereof |
| CN103571212A (en) * | 2012-07-26 | 2014-02-12 | 中国海洋石油总公司 | Asphalt pavement crack filling adhesive and preparation method thereof |
-
2016
- 2016-02-04 CN CN201610079651.3A patent/CN105505307B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103571212A (en) * | 2012-07-26 | 2014-02-12 | 中国海洋石油总公司 | Asphalt pavement crack filling adhesive and preparation method thereof |
| CN103113848A (en) * | 2013-01-21 | 2013-05-22 | 江苏博特新材料有限公司 | Environment-friendly intermediate-temperature pavement pouring glue and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528058A (en) * | 2021-06-16 | 2021-10-22 | 山西博润交通科学工程有限公司 | Desulfurized gypsum powder-based pavement water-based crack pouring adhesive and preparation method thereof |
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| CN105505307B (en) | 2018-01-30 |
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