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A kind of reinforcing material for pavement base course and preparation method thereof

A technology for reinforcing materials and pavement base, which is applied in the field of road construction materials and its preparation, can solve the problems of long maintenance period, high price and high cost, and achieve good anti-rutting performance, good water stability and good life cycle Effect

Active Publication Date: 2021-06-22
贵州省都匀公路管理局 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires a longer maintenance period, which also requires a longer period of construction traffic control, which has a great impact on local traffic, and even causes the maintenance measures to be unguaranteed.
In addition, as the number of loads increases, reflective cracks in the overlay structure will still occur, and the effect is often palliative rather than the root cause
[0005] For excavating the semi-rigid base, although the reflective cracks of the pavement structure can be improved by using asphalt-stabilized macadam base, the cost of improving the performance of asphalt is high, especially as the base material of lower layers, it is expensive to modify asphalt , lack of practicality

Method used

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  • A kind of reinforcing material for pavement base course and preparation method thereof
  • A kind of reinforcing material for pavement base course and preparation method thereof
  • A kind of reinforcing material for pavement base course and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The bitumen used in this example is No. 50 bitumen, and the properties of the bitumen such as penetration, softening point, dynamic viscosity at 60°C, and ductility at 15°C were tested. Measured: penetration 40.5 mm; softening point 52°C; dynamic viscosity 220pas at 60°C; ductility 110cm at 15°C. Therefore, the No. 50 asphalt meets the performance requirements of the asphalt required for making reinforcing materials.

[0036] The corresponding mixture of the reinforcing material in this embodiment is weighed according to the following parts by mass:

[0037] Above-mentioned No. 50 asphalt gets 3.5 mass parts;

[0038] 1 part by mass of cement;

[0039] 98 parts by mass of limestone;

[0040] 1 part by mass of limestone powder.

[0041] The above-mentioned limestone mineral material is composed of synthetic graded aggregates as shown in Table 1, which are in accordance with the reinforcing material of the present invention Synthetic grading requirements for mineral ...

Embodiment 2

[0054] The bitumen used in this example is No. 30 bitumen, and the properties of the bitumen such as penetration, softening point, dynamic viscosity at 60°C, and ductility at 15°C were tested. Measured: penetration 30.5 mm; softening point 65°C; dynamic viscosity 280pas at 60°C; ductility 102cm at 15°C. Therefore, the No. 30 asphalt meets the performance requirements of asphalt for making reinforcing materials.

[0055] The corresponding mixture of the reinforcing material in this embodiment is weighed according to the following parts by mass (each part by mass is 1 kg):

[0056] 3.75 parts by mass of above-mentioned No. 30 asphalt, namely 3.75 kilograms;

[0057] Cement gets 1.5 parts by mass;

[0058] 97 parts by mass of limestone;

[0059] 2 parts by mass of limestone powder.

[0060] The above-mentioned limestone ore materials are composed of synthetic graded aggregates as shown in Table 2, which are in accordance with the reinforcing material of the present invention. ...

Embodiment 3

[0073] The bitumen used in this example is No. 50 bitumen, and the properties of the bitumen such as penetration, softening point, dynamic viscosity at 60°C, and ductility at 15°C were tested. Measured: the penetration is 48 mm; the softening point is 56°C; the dynamic viscosity is 290pas at 60°C; the ductility at 15°C is 120cm. Therefore, the No. 50 asphalt meets the performance requirements of the asphalt required for making reinforcing materials.

[0074] The corresponding mixture of the reinforcing material in this embodiment is weighed according to the following parts by mass:

[0075] Above-mentioned No. 50 asphalt 4.0 mass parts;

[0076] 1.75 parts by mass of cement;

[0077] 95 parts by mass of basalt;

[0078] 3 parts by mass of basalt rock powder.

[0079] The above-mentioned limestone mineral materials are synthetically graded aggregates as shown in Table 3 formed by particle size grades of 0~5mm (that is, particle size<5mm), 5~-10mm, 10~-20mm, and 20~-31.5mm, ...

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Abstract

The invention relates to a reinforcing material used for pavement bases and a preparation method thereof. The corresponding mixture of the reinforcing material includes 3.5-4.5 parts by mass of low-grade asphalt, 1.0-2.0 parts by mass of cement, and 95.0-98.0 parts by mass of ore material, 1.0-3.0 parts of quality mineral powder; among them: the penetration of low-grade asphalt is 20-60mm, the softening point is 49-100°C, the dynamic viscosity at 60°C is 200-400pas, and the ductility at 15°C is 100-200cm. There are corresponding requirements for grading, and there are relevant requirements for the dynamic stability, residual stability, and freeze-thaw splitting strength ratio of the reinforcing material specimen; the preparation method has specific heating and heat preservation requirements for the component materials and intermediate materials. temperature setting. Therefore, through the setting of material-related performance indicators, combined with the synthetic gradation of mineral materials and the control of temperature during the preparation process, the reinforcing material not only has good anti-rutting performance, but also has a relatively low price. At the same time, through relevant performance tests on the test pieces, it is ensured that the products meet the performance requirements of the design.

Description

Technical field: [0001] The invention relates to road construction materials and a preparation method thereof, in particular to a reinforcing material for pavement bases and a preparation method thereof Background technique: [0002] At present, with the increase of highway traffic volume, the increase of automobile axle load and the increase of global warming and disastrous weather, the occurrence rate of highway rutting also increases, which brings great difficulties to road maintenance units. [0003] The asphalt pavement structure is mainly a combination of asphalt concrete surface and semi-rigid base, many of which are two-way single-lane pavement. The method used in the maintenance and repair process is basically milling and resurfacing. The commonly used reinforcement methods are: excavation of semi-rigid base, including full excavation or excavation; or directly paving cement on the old asphalt pavement After stabilizing the aggregates, lay a layer of hot mix asphal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/72
CPCC04B26/26C04B2111/0075C04B2111/72C04B2201/20C04B14/28C04B7/00C04B14/14
Inventor 宋庆红王永维姜鸿白明举严贤贵韦武举周乐业马倩纵瑾瑜封晓桃吕晟王仁辉李锋
Owner 贵州省都匀公路管理局
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