CN108643002A - A kind of design method of basalt fibre water-permeating pitch mixed material match ratio - Google Patents
A kind of design method of basalt fibre water-permeating pitch mixed material match ratio Download PDFInfo
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- CN108643002A CN108643002A CN201810371371.9A CN201810371371A CN108643002A CN 108643002 A CN108643002 A CN 108643002A CN 201810371371 A CN201810371371 A CN 201810371371A CN 108643002 A CN108643002 A CN 108643002A
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- basalt fibre
- mixed material
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1054—Preparing mixtures of which at least part of the solid ingredients has previously been deposited on the surface, excluding penetrating or surface dressing, e.g. in situ mixing, mixing involving lifting of spread or windrowed aggregate
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
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Abstract
The invention discloses a kind of design methods of basalt fibre water-permeating pitch mixed material match ratio, it includes the following steps：One, raw material selects；Two, gradation design；Three, optimum oil-stone ratio determines；Four, mix-design index verification obtains the Target Mixture Ratio of water-permeating pitch mixed material.Design method provided by the invention is easy to operate, it is cost-effective, it avoids dispersion test and determines the cumbersome of water-permeating pitch mixed material bitumen aggregate ratio, reasonably determine the dosage of pitch, it ensure that the properties of asphalt, the blindness and workload for reducing the mix-design stage, significantly improve engineering efficiency.
Description
Technical field
The invention belongs to highway structure investigation of materials fields, and in particular to a kind of basalt fibre water-permeating pitch mixed material cooperation
The design method of ratio.
Background technology
Water-permeating pitch mixed material is significant saturating with it as a kind of open gradation asphalt with the gap that is interconnected
The function of water, good antiskid performance and reduction pavement temperature is at home and abroad widely applied.Foreign scholar passes through research
That thinks that big gap porous pavement gathers materials is mainly insufficient due to the viscosity of pitch and with the adhesiveness gathered materials the reason of dispersing,
The addition of additive is remarkably improved the wear-resisting property of mixture, but can influence the voidage of porous pavement, therefore in addition
It should adequately be tested, to improve the durability on road surface while controlling voidage.The subsequent U.S. is by basalt fibre
For in OGFC, and solve the problems, such as OGFC Random early Detections.For basalt fibre to enhancing stability at high temperature of asphalt mixture, water is steady
Qualitative, durability etc. has remarkable result.Therefore, research basalt fibre refers to water-permeating pitch mixed material mix-design
Mark, which influences to become, solves the problems, such as one of major programme of mix-design.
The asphalt optimum content of water-permeating pitch mixed material is mainly tested by Xie Lunbao pitches wax deposition volume and Superpave mix-design
As a result it selectes.The asphalt usually determined using Xie Lunbao pitch wax deposition volumes will not occur the asphalt content of trickling as upper
Limit, with Superpave mix-design experimental examination asphalt pellet after being open to traffic will not it is loose, fall off, disperse when asphalt content be
Lower limit.Such design method deposits defect both ways:First, such methods are a kind of empirical methods, different people determines random
Property it is bigger and very big with personal practical experience relationship；Second is that the method error of Superpave mix-design is larger, data are not sometimes
Accurately, and tested number is big, therefore how to rationally design water-permeating pitch mixed material mixing proportion design method it is still necessary to by further grinding
Study carefully.
Invention content
The purpose of the present invention is to propose to a kind of design method of basalt fibre water-permeating pitch mixed material match ratio, by
Water-permeating pitch mixed material mixes chopped basalt fibre appropriate, can not only improve mixture performance, and design method is easily grasped
Make, it is cost-effective.The blindness and workload for reducing the mix-design stage, significantly improve engineering efficiency.
The purpose of the present invention is what is be achieved through the following technical solutions：
The design method of basalt fibre water-permeating pitch mixed material match ratio of the present invention, includes the following steps：
Step 1: raw material selects：
Pitch selects high adhered modification pitch, thickness to gather materials for basalt, and miberal powder is levigate limestone, basalt fibre choosing
With chopped basalt fibre,
Whole grading limit of gathering materials is as follows：
Step 2: determining initial bitumen aggregate ratio：
Initial bitumen aggregate ratio is determined according to mineral aggregate adsorption asphalt membrane thickness；
Step 3: optimum oil-stone ratio determines：
Determine the dosage and length of chopped basalt fibre, if initial oilstone ratio is x, with x-1.5, x-1.0, x-0.5,
X, x+0.5, x+1.0, x+1.5 are bitumen aggregate ratio, and the pervious asphalt of the chopped basalt fibre to mixing different length mixes respectively
Material carries out Xie Lunbao wax deposition volumes, then using x-1.5, x-1.0, x-0.5, x, x+0.5, x+1.0, x+1.5 as abscissa value, with it
Corresponding leakage analysis losing value is ordinate value, makees graph of relation, takes on curve and appoints near two coordinate points of x-1.0 and x+1.0
It anticipates at 2 points as point of contact and makees tangent line, the abscissa value of the point of intersection of tangents is optimum oil-stone ratio；
Further, in step 3, x-1.0 and two coordinate points of x+1.0 is taken to make tangent line as point of contact on curve.
Further, in step 4, the voidage for adulterating the basalt fibre water-permeating pitch mixed material that is chopped is 18%-
25%.
Compared with prior art, the present invention has the advantages that following have：
Design method provided by the invention is easy to operate, cost-effective, avoids dispersion test and determines water-permeating pitch mixed material
Bitumen aggregate ratio it is cumbersome, reasonably determine the dosage of pitch, ensure that the properties of asphalt, reduce mix-design rank
The blindness and workload of section, significantly improve engineering efficiency.
Description of the drawings
Fig. 1 is the bitumen aggregate ratio and leakage analysis losing of the water-permeating pitch mixed material for the chopped basalt fibre for mixing different length
Relation curve (a 0mm, b 3mm, c 3mm, d 6mm, e 9mm).
Fig. 2 is that (a is for the water-permeating pitch mixed material Marshall index comparison diagram of the chopped basalt fibre for mixing different length
Marshall stability, b are flow valuve).
Fig. 3 is the chopped basalt fibre water-permeating pitch mixed material voidage of different length and connectivity gap rate contrast test.
Specific implementation mode
With reference to specific embodiment to a kind of best oilstone of basalt fibre water-permeating pitch mixed material of the present invention
It is described further than determining method.
Step 1: raw material and grading selection：
Pitch selects high adhered modification pitch (asphalt content is that bitumen aggregate ratio is multiplied by total mineral aggregate quality), thickness gather materials for Zhenjiang it is profound
The total 3920g of Wu Yan, miberal powder are the levigate Zhenjiang limestone of 80g, the chopped basalt fibre of Jiangsu sky dragon that basalt fibre is selected,
Total mineral aggregate (thickness is gathered materials and miberal powder summation) is 4000g.
Gather materials as follows with the whole grading limit of filler：
Step 2: determining initial bitumen aggregate ratio：
Initial bitumen aggregate ratio is determined according to mineral aggregate adsorption asphalt membrane thickness.
Step 3: optimum oil-stone ratio determines：
The dosage of first determining chopped basalt fibre is 0.3wt% (the 0.3% of mineral aggregate) and 0, then determines that incorporation is chopped profound
Military rock fibre length is respectively (0mm, 3mm, 6mm, 9mm, 12mm), respectively to the permeable drip of basalt fibre of incorporation different length
Green mixture carries out Xie Lunbao wax deposition volumes, if initial oilstone ratio is x, then with x-1.5, x-1.0, x-0.5, x, x+0.5, x+
1.0, x+1.5 is that abscissa value makees graph of relation, x- is taken on curve using its corresponding leakage analysis losing value as ordinate value
1.0 and x+1.0, two coordinate points make tangent line as point of contact, and the abscissa value of the point of intersection of tangents is optimum oil-stone ratio.
Step 4: index verification：
Marshall Test is carried out to adding the basalt fibre water-permeating pitch mixed material that is chopped, with asphalt highway construction skill
Art code requirement is compared, and the mix design detection of asphalt is carried out.
Embodiment：
Step 1: raw material and grading selection：
The gradation design of water-permeating pitch mixed material PAC-13 is with reference to CJJ/T 190-2012《Asphalt paving technology is advised
Journey》The mineral aggregate gradation range of middle defined is designed.The chopped basalt fibre PAC-13 pervious asphalts mixing of determining incorporation
The formate gradation composition table of material is as follows.
Each sieve pore percent of pass of PAC-13 water-permeating pitch mixed material gradings
Step 2: determining initial bitumen aggregate ratio：
The initial bitumen aggregate ratio of water-permeating pitch mixed material PAC-13 is determined with reference to CJJ/T 190-2012《Asphalt paving
Technical regulation》The mineral aggregate adsorption asphalt membrane thickness of middle defined is designed, and initial bitumen aggregate ratio is 4.5%.
Step 3: optimum oil-stone ratio determines：
It first determines that the dosage of chopped basalt fibre is 0.3%, then determines that mixing the basalt fibre length that is chopped is respectively
(0mm, 3mm, 6mm, 9mm, 12mm) is respectively oilstone with 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5% and 6.0%
Than the basalt fibre water-permeating pitch mixed material to mixing different length carries out Xie Lunbao wax deposition volumes, determines its analysis leakage respectively
Penalty values, then with 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5% and 6.0% for abscissa point, with its corresponding analysis
Leakage penalty values are ordinate value, then draw the relation curve of bitumen aggregate ratio and leakage analysis losing, and it is 3.5% He that abscissa is taken on curve
The tangent line of 2 points of 5.5% works, intersection point abscissa are optimum oil-stone ratio, bitumen aggregate ratio is respectively 4.6%, 4.8%, 4.8%,
4.9%, 4.95%, the bitumen aggregate ratio of different fibre lengths and the relation curve of leakage analysis losing are as shown in Figure 1.
Asphalt type
Step 4: index verification：
Marshall Test is carried out to adding the basalt fibre water-permeating pitch mixed material that is chopped, with asphalt highway construction skill
Art code requirement is compared, and the mix design detection of asphalt is carried out, and test result is as shown in Figure 2.
As seen from Figure 1, leakage analysis losing increases with the increase of bitumen aggregate ratio, mix the basalt fibre length of being chopped be 0mm,
The chopped basalt fibre water-permeating pitch mixed material optimum oil-stone ratio of 3mm, 6mm, 9mm, 12mm is respectively 4.6%, 4.8%,
4.8%, 4.9%, 4.95%.The optimum oil-stone ratio of basalt fibre water-permeating pitch mixed material in conclusion incorporation is chopped, with
It mixes the increase for the basalt fibre length that is chopped and improves.
Such as Fig. 2, five kinds of water-permeating pitch mixed material Marshall stability sizes are followed successively by：A5>A4>A3>A2>A1,5 kinds permeable
Asphalt flow valuve size is followed successively by：A1>A3>A4>A2>A5 improves pervious asphalt with the incorporation of chopped basalt fibre
The stability and flow valuve of mixture, and meet specification.
As seen from Figure 3,5 kinds of water-permeating pitch mixed material voidage sizes are followed successively by：A3>A4>A1>A2>A5, connectivity gap rate
Size is followed successively by：A3>A4>A1>A2>A5.On the whole, with the incorporation of chopped basalt fibre, improve pervious asphalt mixing
The stability and flow valuve of material, improve water-permeating pitch mixed material mechanical property it is high temperatures can increase, and meet specification, match
Composition and division in a proportion design is completed.
The present invention is described by way of example above, but the present invention is not limited to above-mentioned specific embodiment, all to be based on
Any changes or modifications that the present invention is done belong to the scope of protection of present invention.
Claims (4)
1. the design method of basalt fibre water-permeating pitch mixed material match ratio, which is characterized in that include the following steps：
Step 1: raw material and grading selection：
Pitch selects high adhered modification pitch, thickness to gather materials for basalt, and miberal powder is levigate limestone, what basalt fibre was selected
Be chopped basalt fibre；
Whole grading limit of gathering materials is as follows：
Step 2: determining initial bitumen aggregate ratio：
Initial bitumen aggregate ratio is determined according to mineral aggregate adsorption asphalt membrane thickness；
Step 3: optimum oil-stone ratio determines：
The dosage and length of chopped basalt fibre are determined, if initial oilstone ratio is x, with x-1.5, x-1.0, x-0.5, x, x+
0.5, x+1.0, x+1.5 be bitumen aggregate ratio, respectively to mix different length chopped basalt fibre water-permeating pitch mixed material into
Row Xie Lunbao wax deposition volumes, then using x-1.5, x-1.0, x-0.5, x, x+0.5, x+1.0, x+1.5 as abscissa value, it is corresponding with it
Leakage analysis losing value be ordinate value, make graph of relation, taken on curve arbitrary two near two coordinate points of x-1.0 and x+1.0
Point makees tangent line as point of contact, and the abscissa value of the point of intersection of tangents is optimum oil-stone ratio；
Step 4: mix-design index verification：
Marshall Test is carried out to adulterating the basalt fibre water-permeating pitch mixed material that is chopped, is advised with asphalt highway construction technology
Model requires to be compared, and carries out the mix design detection of asphalt.
2. design method as described in claim 1, which is characterized in that in step 1, thickness is gathered materials for Zhenjiang basalt, miberal powder
For levigate Zhenjiang limestone, basalt fibre selects the chopped basalt fibre of Jiangsu sky dragon.
3. design method as described in claim 1, which is characterized in that in step 3, x-1.0 and x+1.0 two are taken on curve
Coordinate points make tangent line as point of contact.
4. design method as described in claim 1, which is characterized in that in step 4, adulterate the permeable drip of basalt fibre that is chopped
The voidage of green mixture is 18%-25%.
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| CN201810371371.9A CN108643002B (en) | 2018-04-24 | 2018-04-24 | Design method of basalt fiber permeable asphalt mixture mixing ratio |
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| CN201810371371.9A CN108643002B (en) | 2018-04-24 | 2018-04-24 | Design method of basalt fiber permeable asphalt mixture mixing ratio |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243685A (en) * | 2020-02-28 | 2020-06-05 | 南通大学 | Design method for mix proportion of pervious asphalt concrete mixture |
| CN111892335A (en) * | 2020-07-07 | 2020-11-06 | 东南大学 | Drainage asphalt mixture optimal design method based on composition mechanism |
| CN112557244A (en) * | 2020-11-21 | 2021-03-26 | 扬州大学 | Method for evaluating dispersion uniformity of basalt fibers in asphalt mixture |
| CN115078089A (en) * | 2022-06-09 | 2022-09-20 | 长沙理工大学 | Porous asphalt mixture grading method with improved mechanical properties |
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2018
- 2018-04-24 CN CN201810371371.9A patent/CN108643002B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243685A (en) * | 2020-02-28 | 2020-06-05 | 南通大学 | Design method for mix proportion of pervious asphalt concrete mixture |
| CN111892335A (en) * | 2020-07-07 | 2020-11-06 | 东南大学 | Drainage asphalt mixture optimal design method based on composition mechanism |
| CN112557244A (en) * | 2020-11-21 | 2021-03-26 | 扬州大学 | Method for evaluating dispersion uniformity of basalt fibers in asphalt mixture |
| CN112557244B (en) * | 2020-11-21 | 2023-10-27 | 扬州大学 | Method for evaluating dispersion uniformity of basalt fibers in asphalt mixture |
| CN115078089A (en) * | 2022-06-09 | 2022-09-20 | 长沙理工大学 | Porous asphalt mixture grading method with improved mechanical properties |
| CN115078089B (en) * | 2022-06-09 | 2023-07-07 | 长沙理工大学 | Porous asphalt mixture grading method with improved mechanical properties |
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