CN1164684C - Diatomite modified asphalt - Google Patents
Diatomite modified asphalt Download PDFInfo
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- CN1164684C CN1164684C CNB011087005A CN01108700A CN1164684C CN 1164684 C CN1164684 C CN 1164684C CN B011087005 A CNB011087005 A CN B011087005A CN 01108700 A CN01108700 A CN 01108700A CN 1164684 C CN1164684 C CN 1164684C
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- asphalt
- diatomite
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- road surface
- modified asphalt
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Abstract
The present invention provides diatomite modified asphalt which is characterized in that the diatomite modified asphalt is composed of the ingredients in the following weight percentages of 75% to 92% of asphalt, and 8% to 25% diatomite. The present invention solves the technical problems that the asphalt road is softened to cause ruts, convex parts, looseness, and water pits, easily has cracks in cold winters, etc. The present invention enables the asphalt road to have high and stable high-temperature performance and low-temperature performance, high ageing resistance and high water stability. Meanwhile, the harmful gas generated by the volatilization of the heated asphalt is effectively reduced in order to reduce the environmental pollution caused by the asphalt. The present invention can simplify the road surface construction, increase the mechanized construction degree, and reduce the cost, and enables the anti-fatigue life of the road surface to be prolonged by 50%. The flatness of the road surface can be kept for a long time, and thus, the road surface has good anti-skid performance and high cost performance. Thus, the present invention is the new road surface material for roads.
Description
The present invention relates to a kind of pitch, especially a kind ofly contain diatomaceous modifying asphalt.
Along with high speed development of national economy, communications and transportation also develops towards the direction of high speed, heavy duty, big flow, and this not only requires highway subgrade solid, firm, but also requires highway pavement to possess performances such as wear-resisting, high temperature resistant, not softening, smooth, smooth.On high grade highway pavement, use maximum bituminous pavements that remains at present.Owing to be subjected to the restriction of pitch self performance, it is bituminous high and low temperature unstable properties, under the intensive solar radiation, pitch is softening easily, pitch after softening is very easily taken away by automotive wheel, make the sand of highway pavement, the effect that stone loses binding agent, thereby produce rut, gather around bag, loose and swag; Be prone to slight crack in the winter of cold, had a strong impact on the work-ing life of highway.People attempt in pitch to add some and can improve the additive of asphalt performance for this reason, are intended to remedy the original performance deficiency of pitch.But because existing asphalt modifier costs an arm and a leg, strengthened investments in highway building, made cost be higher than existing level far away, be not suitable for large-scale promotion application.Therefore, be necessary prior art is improved.
The objective of the invention is to overcome the deficiency of prior art, provide that a kind of superior performance, cost are low, the diatomite modified asphalt of long service life, easy construction.
Diatomite modified asphalt of the present invention is made of the component of following weight percent:
Pitch 75-92%, diatomite 8-25%.
Noncrystal silicon-dioxide (sio in the described diatomite
2) content is greater than 70%, loss on ignition is less than 5%, and specific surface area is greater than 12m
2/ ml, little ring algae accounts for 80%, diatom particle diameter 10-20mm, PH 6-8, tight bulk density 0.3g/cm3 ± 0.1, granularity is less than 35 μ m.
Diatomite modified asphalt of the present invention makes by following processing method: after pitch and diatomite mixing, under 110-180 ℃ of temperature, stirred 5-30 minute, promptly get the diatomite modified asphalt product behind the naturally cooling.During use this product once more after the heat fused, is sneaked into other highway construction raw material, and construct by prior art and to get final product.
The present invention compared with prior art has following advantage and effect: because diatomite is that a kind of interior tissue is complete, porous crack and contain the small opal of crystal water, its specific surface area is big, has extremely strong adsorptive power, and it is high temperature resistant, so after pitch mixes, decapacitation makes bituminous pavement have higher more steady high and low temperature performance and higher ageing resistance, outside the water stability energy, the obnoxious flavour that volatilization produces in the time of can also effectively reducing the pitch heating, thus the pitch pollution on the environment alleviated.Use the present invention can simplify pavement construction, improve the mechanized construction degree, reduce cost, and make the anti-fatigue life on road surface improve 50%, and can keep evenness of road surface for a long time, make it to have non-skid property preferably, higher performance, therefore, real is ideal highway ground surface material of new generation.
Table 1, table 2, table 3 are the present invention's diatomite modified asphalt and other bituminous performance synopsis.
Below in conjunction with specific embodiment the present invention is further described, is not limited in this but hold within the present invention.
Embodiment 1
Get Maoming and heavily hand over AH-90
#Pitch 170 grams, put into heated and stirred container internal heating and be stirred to 170 ℃, equably drop in pitch less than the diatomite of 35 μ m 30 gram particle degree, in 140-150 ℃ temperature range, stirred 5 minutes, progressively reduce rotating speed afterwards, the bubble in the pitch is discharged fully, naturally cool to room temperature, promptly get the diatomite modified asphalt product, its performance sees Table 1.
Embodiment 2
Get Maoming and heavily hand over AH-90
#Pitch 184 grams, put into heated and stirred container internal heating and be stirred to 180 ℃, equably drop in pitch less than the diatomite of 35 μ m 16 gram particle degree, in 140-150 ℃ temperature range, stirred 15 minutes, progressively reduce rotating speed afterwards, bubble in the pitch is discharged fully, naturally cool to room temperature, promptly get the diatomite modified asphalt product.
Embodiment 3
Get Maoming and heavily hand over AH-90
#Pitch 150 grams, put into heated and stirred container internal heating and be stirred to 110 ℃, equably drop in pitch less than the diatomite of 35 μ m 50 gram particle degree, in 140-150 ℃ temperature range, stirred 30 minutes, progressively reduce rotating speed afterwards, bubble in the pitch is discharged fully, naturally cool to room temperature, promptly get the diatomite modified asphalt product.
Modified asphalt technology index determining result
Table 1
| Asphalt variety | Maoming AH-90 # | Diatomite RR-300 modifying asphalts | The APAO modification | The shoddy modification | |
| Penetration degree (100g.5s, l/10mm) | 30℃ | 165 | 137.8 | 132 | 185.8 |
| 25℃ | 95.8 | 84.5 | 75.3 | 128.3 | |
| 15℃ | 26.5 | 27.5 | 26 | 49.5 | |
| PI | -1.8256 | -1.0448 | -1.0314 | 0.2215 | |
| T 800℃ | 42.6 | 46.1 | 46.8 | 46.0 | |
| T 12℃ | -10.3 | -14.1 | -13.4 | -26.9 | |
| Ductility (cm) | 15℃ | ＞150 | 52.5 | 71.8 | 35.5 |
| 10℃ | 108.3 | 34.1 | 25.2 | 25.0 | |
| 5℃ | 14.5 | 8.1 | 9 | 18.0 | |
| Softening temperature, ℃ | 46.3 | 49.5 | 51.3 | 51.3 | |
| Kinetic viscosity (Pa.s, 135 ℃) | 0.28 | 0.65 | 0.44 | 0.89 | |
| Thin film heating test (163,5h) | Mass loss, % | 0.037 | 0.023 | 0.015 | 0.108 |
| Penetration ratio, % | 67.9 | 78.11 | 72.8 | 87.3 | |
| 5 ℃ of ductilities (cm) | 8.8 | 5.5 | 5.7 | 17.8 | |
The modified asphalt mixture test-results
Table 2
| Asphalt variety | Maoming AH-90 # | Diatomite RR-300 modifying asphalts | The APAO modification | The shoddy modification | ||
| 60 ℃ of wheel tracking test DS (inferior/mm) | 181.5 | 267.9 | 269.5 | 430.2 | ||
| Low-temperature performance | 0℃ | Load (KN) | 5.065 | 5.995 | 5.485 | 5.270 |
| Strain (μ ε) | 3857 | 4168 | 5574 | 6447 | ||
| Energy (J) | 0.6163 | 0.5493 | 1.133 | 1.290 | ||
| -5℃ | Load (KN) | 4.316 | 5.335 | 5.287 | 5.49 | |
| Strain (μ ε) | 4119 | 5633 | 2800 | 3625 | ||
| Energy (J) | 0.384 | 0.738 | 0.448 | 0.561 | ||
| -10℃ | Load (KN) | 3.334 | 5.766 | 5.287 | 5.133 | |
| Strain (μ ε) | 2623 | 3517 | 2962 | 3234 | ||
| Energy (J) | 0.195 | 0.428 | 0.3265 | 0.343 | ||
| Water stability | Residual stability (%) | 91.6 | 101 | 92.1 | 97.8 | |
| The freeze thawing cleavage strength is than (%) | 78.8 | 94.6 | 84 | 95 | ||
| 20 ℃ of flexural tensile strengths of normal temperature, (MPa) | 2.676 | 2.69 | ||||
Asphalt mixture fatigue testing result (20 ℃) before and after the modification
Table 3
Claims (2)
1, a kind of diatomite modified asphalt is characterized in that it is made of the component of following weight percent: pitch 75-92%, diatomite 8-25%.
2, diatomite modified asphalt according to claim 1 is characterized in that the noncrystal silicon-dioxide (sio in the described diatomite
2) content is greater than 70%, loss on ignition is less than 5%, and specific surface area is greater than 12m
2/ ml, little ring algae accounts for 80%, diatom particle diameter 10-20mm, PH6-8, tight bulk density 0.3g/cm3 ± 0.1, granularity is less than 35 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011087005A CN1164684C (en) | 2001-08-02 | 2001-08-02 | Diatomite modified asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011087005A CN1164684C (en) | 2001-08-02 | 2001-08-02 | Diatomite modified asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1400251A CN1400251A (en) | 2003-03-05 |
| CN1164684C true CN1164684C (en) | 2004-09-01 |
Family
ID=4657495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011087005A Expired - Fee Related CN1164684C (en) | 2001-08-02 | 2001-08-02 | Diatomite modified asphalt |
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| CN (1) | CN1164684C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301289C (en) * | 2005-01-21 | 2007-02-21 | 云南大学 | Asphalt modifier for bituminous concrete pavement and method for preparing same |
| CN101845229B (en) * | 2010-05-20 | 2011-11-02 | 李滢 | Waste clay asphalt modifier and production method thereof |
| CN103964754B (en) * | 2014-05-12 | 2015-11-18 | 桂林理工大学 | Improve the preparation method of the silicon modified asphalt compound of damp-heat area bituminous pavement property |
| CN105907115B (en) * | 2016-06-29 | 2019-07-19 | 四川宏辉科技有限公司 | A kind of diatomite asphalt mixed material modifier and modified asphalt mixture |
| CN107100052A (en) * | 2017-06-23 | 2017-08-29 | 云南新同程建设集团有限公司 | It is a kind of to strengthen the construction method of bituminous paving intensity |
| CN107698990B (en) * | 2017-09-30 | 2020-09-01 | 湖南科技大学 | Ceramic polished brick powder modified asphalt prepared from industrial waste residues and preparation method thereof |
| CN110079101A (en) * | 2018-01-26 | 2019-08-02 | 上海交通大学 | A kind of modified pitch for seasonal frost region bituminous pavement |
| CN110079102A (en) * | 2018-01-26 | 2019-08-02 | 上海交通大学 | A kind of modified pitch for high temperature heavy load area |
| CN110054438B (en) * | 2019-04-12 | 2021-08-20 | 重庆市市政设计研究院有限公司 | High-performance modified asphalt, preparation method thereof and asphalt concrete |
| CN113105160A (en) * | 2021-03-05 | 2021-07-13 | 同济大学 | Asphalt pavement material for purifying road runoff pollution and preparation method and application thereof |
| CN115584202A (en) * | 2022-09-28 | 2023-01-10 | 沥宏新材料科技(上海)有限公司 | Silicon modified asphalt fog sealing layer material and preparation method thereof |
-
2001
- 2001-08-02 CN CNB011087005A patent/CN1164684C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1400251A (en) | 2003-03-05 |
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