CN101786833A - Method for preparing multifunctional mineral asphalt concrete pavement material - Google Patents
Method for preparing multifunctional mineral asphalt concrete pavement material Download PDFInfo
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- CN101786833A CN101786833A CN200910254550A CN200910254550A CN101786833A CN 101786833 A CN101786833 A CN 101786833A CN 200910254550 A CN200910254550 A CN 200910254550A CN 200910254550 A CN200910254550 A CN 200910254550A CN 101786833 A CN101786833 A CN 101786833A
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Abstract
The invention discloses a method for preparing a multifunctional mineral asphalt concrete pavement material. The preparation method comprises the step of adding magnetic iron powder and brucite short fibers in traditional asphalt concrete to replace part of aggregate in the raw materials of the traditional asphalt concrete, wherein the weight sum of the added magnetic iron powder and the brucite short fibers accounts for 10-25% of the total weight of the asphalt concrete materials in terms of the mass ratio; the weight of asphalt and natural aggregate accounts for 75-90% of the total weight of the asphalt concrete materials; and the weight ratio of the magnetic iron powder to the brucite short fibers is 1-4:1. By adjusting microwave electromagnetic parameters of the asphalt concrete, the microwave heating rate is improved by a dozen times compared with the traditional asphalt concrete, the mechanical property and the flame retardance of the asphalt concrete are improved at the same time while the material cost is lower, pavement microwave deicing and snow melting efficiency can be increased, and the mechanical property and the flame retardance are good when the pavement microwave rapid heating maintenance is realized, thus being applicable to asphalt concrete pavement.
Description
Technical field
The present invention relates to pavement of road material technology field, be specifically related to be used for the preparation method of a kind of multifunctional mineral asphalt concrete pavement material of microwave heating.
Background technology
As everyone knows, winter road deicing for Road transport safety, ensure that traffic is unobstructed significant.Microwave heating is a kind of modern technique of road deicing, has carried out big quantity research both at home and abroad.
The regeneration of microwave heating asphalt concrete road surface, maintenance for save the Road construction cost, prolong pavement material work-ing life, energy-conserving and environment-protective are significant equally.
Yet in the process of microwave heating asphalt concrete road surface, obviously there is the inefficient defective of microwave heating, seriously limited the application of microwave heating technique in the ground surface material field.Tracing it to its cause is that the electromagnetic parameter of asphalt concrete material own is unreasonable, causes the microwave absorbing rate low, and the microwave heating degree of depth is big, and the road surface heat-up rate waits a series of problems slowly.
In bituminous concrete, add artificial microwave absorption, because the cost height has limited it and promoted the use of on a large scale.
And in the bituminous concrete owing to contain the pitch material, belong to inflammable material, the presence of fire easily in the improper or traffic accident in microwave heating, asphalt flame-retardant also is the problem that asphalt pavement material faces, and adopts the fire-retardant high problem of cost that exists equally of chemical substance usually.
The fibre reinforced asphalt concrete material also is the ordinary method that bituminous concrete improves mechanical property, the high-intensity inorganic basaltic rocks fiber of mentioning in the patent 200710021648.7, require inorganic fibre to have greater than the Young's modulus of 85GPa with greater than the tensile strength of 3500GPa, obviously mineral fibre is difficult to reach these indexs, and the cost height has limited its widespread use.
Strengthen the microwave heating efficient of bituminous concrete, improve its flame retardant properties with mechanical property and significantly reduce the asphalt concrete material preparation cost and become the problem to be solved in the present invention.
Summary of the invention
The purpose of this invention is to provide the microwave heating speed that a kind of cost is low, can improve asphalt pavement material, be used for deicing, snow melting, the mineral bitumen concrete material of aspects such as renewable asphalt pavement material construction, bituminous pavement rapid curing, simultaneously such mineral bitumen concrete material all improves than concrete flame retardant properties of traditional asphalt and mechanical property, is the preparation method who integrates a kind of multifunctional mineral asphalt concrete pavement material of microwave heating, fire-retardant and enhancement function.
In order to overcome the deficiencies in the prior art, technical scheme of the present invention is to solve like this: a kind of preparation method of multifunctional mineral asphalt concrete pavement material, and its special character is to be undertaken by following step:
1), in traditional bituminous concrete, adds magnetite powder and brucite staple fibre and partly substitute gathering materials in the traditional asphalt concrete material;
2), describedly in traditional bituminous concrete, add magnetite powder and the brucite staple fibre is pressed mass ratio, magnetite powder and brucite staple fibre weight sum account for the 10-25% of asphalt concrete material gross weight; Its medium pitch and natural aggregate weight account for the 75-90% of asphalt concrete material gross weight, and described magnetite powder and brucite staple fibre weight ratio are 1-4: 1.
Described magnetite powder particle diameter is less than 0.075 millimeter, and wherein the Z 250 weight content in the magnetite powder needs greater than 40%.
Described brucite staple length is less than 5 millimeters, and surface resistivity is less than 10
7Ohm/cm.
The concrete preparation method of described multi-functional slag asphalt is identical with traditional asphalt concrete making technology preparation method.
The present invention compared with prior art has the following advantages:
1), multifunctional mineral asphalt concrete pavement material of the present invention can adopt traditional bituminous concrete preparation technology and equipment to obtain, preparation technology is simple;
2), multifunctional mineral asphalt concrete pavement material of the present invention improves several times to tens times than the concrete microwave heating temperature rise rate of traditional asphalt.The microwave asphalt concrete material that the present invention obtains can effectively overcome the big problem of the microwave heating degree of depth in the microwave heating process of traditional asphalt concrete road surface, and, the heat utilization ratio height, surface temperature rise is fast, can improve the heating efficiency on microwave deicing, snow melting efficient and microwave curing road surface;
3), the present invention adopts and adds magnetic breeze and brucite mineral fibres, not only opens up new purposes for the utilization of mineral fibre, and reduces cost for functional road surface, the tensile strength of raising bituminous concrete is improved flame retardant properties and is found new solution route.
Embodiment
Below by embodiment, summary of the invention is further described in detail.
A kind of preparation method of multifunctional mineral asphalt concrete pavement material, undertaken by following step:
1), in traditional bituminous concrete, adds magnetite powder and brucite staple fibre and partly substitute gathering materials in the traditional asphalt concrete material;
2), describedly in traditional bituminous concrete, add magnetite powder and the brucite staple fibre is pressed mass ratio, magnetite powder and brucite staple fibre weight sum account for the 10-25% of asphalt concrete material gross weight; Its medium pitch and natural aggregate weight account for the 75-90% of asphalt concrete material gross weight, and described magnetite powder and brucite staple fibre weight ratio are 1-4: 1.
Described magnetite powder particle diameter is less than 0.075 millimeter, and wherein the Z 250 weight content in the magnetite powder needs greater than 40%.
Described brucite staple length is less than 5 millimeters, and surface resistivity is less than 10
7Ohm/cm.
The concrete preparation method of described multi-functional slag asphalt is identical with traditional asphalt concrete making technology preparation method.
Embodiment 1
It is consolidating material with shell 90# pitch that the preparation method selects road for use, and coarse aggregate is a limestone gravel, and fine aggregate adopts magnetite powder, and the mineral bitumen concrete proportioning is: Fe
3O
4Magnetite powder 10 grams of content 55%, pitch 10 grams, the magnetite powder particle diameter is less than 0.075 millimeter, the brucite staple length is 2.36 millimeters, brucite fiber weight 5 grams, limestone gravel coarse aggregate 130 grams, in 155 ℃ ± 5 ℃ following uniform mixings of temperature, compression moulding under 20Mpa pressure obtains 50 millimeters of diameters, highly is 26 millimeters cylindrical sample.Heating is 60 seconds under the microwave frequency 0.5kw of 2.45GHz output rating condition, and the bituminous concrete temperature has raise 40 ℃, and does not add the traditional asphalt concrete of magnetite powder and brucite fiber, heats the same time, and temperature rises less than 4 ℃.The concrete oxygen index of mineral bitumen improves 5 than the plain asphalt concrete, and anti-rut number of times improves 6%.
Embodiment 2
It is consolidating material with shell 90# pitch that the preparation method selects road for use, and coarse aggregate is a limestone gravel, and fine aggregate adopts magnetite powder, and the mineral bitumen concrete proportioning is: Fe
3O
4Magnetite powder 15 grams of content 55%, pitch 10 grams, the magnetite powder particle diameter is less than 0.075 millimeter, the brucite staple length is 2.36 millimeters, brucite fiber weight 10 grams, and the limestone gravel coarse aggregate 120 that calculates according to continuous grading restrains, in 155 ℃ ± 5 ℃ uniform mixings of temperature, compression moulding under 20Mpa pressure obtains 50 millimeters of diameters, highly is 26 millimeters cylindrical sample.Heating is 60 seconds under the microwave frequency 0.5kw of 2.45GHz output rating condition, and the bituminous concrete temperature has raise 60 ℃, and does not add the bituminous concrete of magnetite powder and brucite fiber, heats the same time, and temperature rises less than 4 ℃.The concrete oxygen index of mineral bitumen improves 12 than the plain asphalt concrete, and anti-rut number of times improves 7%.
Embodiment 3
It is consolidating material with shell 70# pitch that the preparation method selects road for use, and coarse aggregate is a limestone gravel, and fine aggregate adopts magnetite powder, and the slag asphalt concrete proportioning is: Fe
3O
4Magnetite powder 20 grams of content 50%, pitch 10 grams, the magnetite powder particle diameter is less than 0.075 millimeter, brucite fiber length is 1.18 millimeters, brucite fiber weight 15 gram, limestone gravel coarse aggregate 115 grams of the 0.075-4.75 millimeter that calculates according to grating, in 155 ℃ ± 5 ℃ uniform mixings of temperature, compression moulding under 20Mpa pressure obtains 50 millimeters of diameters, highly is 26 millimeters cylindrical sample.Heating is 60 seconds under the microwave frequency 0.5kw of 2.45GHz output rating condition, and the bituminous concrete temperature has raise 66 ℃, and does not add the bituminous concrete of magnetite powder and brucite fiber, heats the same time, and temperature rises less than 4 ℃.The concrete oxygen index of mineral bitumen improves 13 than the plain asphalt concrete, and anti-rut number of times improves 10%.
Embodiment 4
It is consolidating material with shell 70# pitch that the preparation method selects road for use, and coarse aggregate is a limestone gravel, and fine aggregate adopts magnetite powder, and the slag asphalt concrete proportioning is: Fe
3O
4Magnetite powder 20 grams of content 50%, pitch 10 grams, the magnetite powder particle diameter is less than 0.075 millimeter, brucite fiber length is 4.75 millimeters, brucite fiber weight 20 grams, and the 0.075-4.75 millimeter limestone gravel coarse aggregate 110 that calculates according to continuous grading restrains, in 155 ℃ ± 5 ℃ uniform mixings of temperature, compression moulding under 20Mpa pressure obtains 50 millimeters of diameters, highly is 26 millimeters cylindrical sample.Heating is 60 seconds under the microwave frequency 0.5kw of 2.45GHz output rating condition, and the bituminous concrete temperature has raise 70 ℃, and does not add the bituminous concrete of magnetite powder and brucite fiber, heats the same time, and temperature rises less than 4 ℃.Mineral bitumen concrete oxygen index improves 13 than the plain asphalt concrete, and anti-rut number of times improves 9%.
Claims (4)
1. the preparation method of a multifunctional mineral asphalt concrete pavement material, undertaken by following step:
1), in traditional bituminous concrete, adds magnetite powder and brucite staple fibre and partly substitute biography
Gathering materials in the system bituminous concrete raw material;
2), describedly in traditional bituminous concrete, add magnetite powder and the brucite staple fibre is pressed mass ratio, magnetite powder and brucite staple fibre weight sum account for the 10-25% of asphalt concrete material gross weight; Its medium pitch and natural aggregate weight account for the 75-90% of asphalt concrete material gross weight, and described magnetite powder and brucite staple fibre weight ratio are 1-4: 1.
2. the preparation method of a kind of multifunctional mineral asphalt concrete pavement material according to claim 1 is characterized in that described magnetite powder particle diameter less than 0.075 millimeter, and wherein the Z 250 weight content in the magnetite powder needs greater than 40%.
3. the preparation method of a kind of multifunctional mineral asphalt concrete pavement material according to claim 1 is characterized in that described brucite staple length less than 5 millimeters, and surface resistivity is less than 107 ohm/cm.
4. the preparation method of a kind of multifunctional mineral asphalt concrete pavement material according to claim 1 is characterized in that the preparation method of described multifunctional mineral bituminous concrete is identical with traditional asphalt concrete making technology preparation method.
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| CN2009102545505A CN101786833B (en) | 2009-12-28 | 2009-12-28 | Method for preparing multifunctional mineral asphalt concrete pavement material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329104A (en) * | 2011-07-11 | 2012-01-25 | 江苏东交工程设计顾问有限公司 | Three-phase composite conductive anti-freezing asphalt mixture and preparation method thereof |
| CN103044936A (en) * | 2013-01-10 | 2013-04-17 | 长安大学 | Gangue asphalt modifier, modified asphalt mixture, and preparation methods of gangue asphalt modifier and modified asphalt mixture |
| CN103288392A (en) * | 2013-06-05 | 2013-09-11 | 长安大学 | Fiber-toughened cement-emulsified asphalt-based mixture and preparation method thereof |
| CN103496888A (en) * | 2013-10-26 | 2014-01-08 | 长安大学 | Modified asphalt concrete capable of reducing temperature of road surface |
| CN109704648A (en) * | 2019-01-19 | 2019-05-03 | 江苏盛达飞建筑材料有限公司 | A kind of Recycled Asphalt Pavement and preparation method thereof |
| CN111499268A (en) * | 2020-03-25 | 2020-08-07 | 长安大学 | Asphalt mixture for improving microwave absorption efficiency and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10213026A1 (en) * | 2002-03-22 | 2003-10-02 | Basf Ag | Polymer dispersions as additives in building materials |
| CN101077932B (en) * | 2006-05-23 | 2011-05-25 | 深圳市海川实业股份有限公司 | Flame-proof asphalt for road and preparation method thereof |
| CN101153117B (en) * | 2006-09-28 | 2011-04-20 | 深圳市海川实业股份有限公司 | Bitumen flame-proof modifier |
-
2009
- 2009-12-28 CN CN2009102545505A patent/CN101786833B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329104A (en) * | 2011-07-11 | 2012-01-25 | 江苏东交工程设计顾问有限公司 | Three-phase composite conductive anti-freezing asphalt mixture and preparation method thereof |
| CN103044936A (en) * | 2013-01-10 | 2013-04-17 | 长安大学 | Gangue asphalt modifier, modified asphalt mixture, and preparation methods of gangue asphalt modifier and modified asphalt mixture |
| CN103044936B (en) * | 2013-01-10 | 2016-04-06 | 长安大学 | A kind of gangue asphalt modifier, modified asphalt mixture and preparation method thereof |
| CN103288392A (en) * | 2013-06-05 | 2013-09-11 | 长安大学 | Fiber-toughened cement-emulsified asphalt-based mixture and preparation method thereof |
| CN103288392B (en) * | 2013-06-05 | 2014-12-17 | 长安大学 | Fiber-toughened cement-emulsified asphalt-based mixture and preparation method thereof |
| CN103496888A (en) * | 2013-10-26 | 2014-01-08 | 长安大学 | Modified asphalt concrete capable of reducing temperature of road surface |
| CN103496888B (en) * | 2013-10-26 | 2015-06-10 | 长安大学 | Modified asphalt concrete capable of reducing temperature of road surface |
| CN109704648A (en) * | 2019-01-19 | 2019-05-03 | 江苏盛达飞建筑材料有限公司 | A kind of Recycled Asphalt Pavement and preparation method thereof |
| CN109704648B (en) * | 2019-01-19 | 2021-06-08 | 江苏盛达飞建筑材料有限公司 | Recycled asphalt concrete and preparation method thereof |
| CN111499268A (en) * | 2020-03-25 | 2020-08-07 | 长安大学 | Asphalt mixture for improving microwave absorption efficiency and preparation method thereof |
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| CN101786833B (en) | 2012-06-27 |
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