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Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof

一种沥青混凝土、确定方法的技术，应用在高模量沥青混凝土组成的确定领域，能够解决不适用、沥青混合料空隙率低等问题，达到节约工程造价、易于工程操作和质量控制的效果

Active Publication Date: 2012-06-20
RES INST OF HIGHWAY MINIST OF TRANSPORT +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the design method adopted by foreign high modulus asphalt concrete is not suitable for coarse-grained asphalt mixture with a maximum nominal particle size greater than 19mm, and its design idea is to choose continuous gradation and higher binder dosage, the designed The porosity of asphalt mixture is low, and it is not suitable for the heavy-duty traffic in my country

Method used

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  • Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof
  • Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof
  • Composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and determination method thereof

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Embodiment approach

[0056] A certain expressway is in hot summer zone (1-1) and humid zone, and it is proposed to use skeleton embedded extrusion type coarse-grained high modulus asphalt concrete HMAC25, then according to the content of the present invention, the specific implementation is as follows:

[0057] Step 1: Identify Raw Materials

[0058] According to the actual situation of the project, choose two types of asphalt with a penetration degree: one is Pen40 / 60 asphalt which meets the relevant requirements in the current "Technical Specifications for Road Asphalt Pavement Construction" (JTG F40-2004) and the penetration degree is not greater than 30 Pen20 / 30 low-grade hard asphalt, and coarse aggregate, fine aggregate and filler with a maximum nominal particle size of not less than 26.5mm are used as raw materials for preparing high modulus asphalt concrete.

[0059] Step 2: Determine the Design Grading Curve

[0060] According to the design of HMAC25 high modulus asphalt concrete, the ma...

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Abstract

The invention relates to a composition of skeleton interlocking coarse grain-type high-modulus asphalt concrete and a determination method thereof and belongs to the field of road engineering design. The concrete contains No. AH-30 low-grade hard asphalt as cementing material having a needle penetration degree of equal to or less than 30 and coarse aggregates having maximum nominal particle size of not less than 26.5 mm. The gradation curve is designed based on the design concept of coarse aggregate gap gradation, and the optimum oil-stone ratio is determined based on the mix design of asphalt mixture in the closest state. The concrete is a novel asphalt concrete material which is good in deformation resistance and load-carrying capability and has technical reliability and economic rationality, and can form the closest skeleton interlocking structure. The high temperature stability of the asphalt mixture is greatly improved, and the mechanical property of the asphalt mixture is enhanced as well. The strength is increased by more than 50% as compared with the common asphalt mixture, and the dynamic complex modulus is increased by more than 30% as compared with the similar foreign products. Therefore, the asphalt concrete has excellent road performances.

Description

【Technical field】 [0001] The present invention relates to a composition of high-quality asphalt concrete used in road engineering and its determination method, in particular to the use of low-grade hard asphalt with a penetration of about 30 (0.1 mm) and a high-modulus high-modulus asphalt with a maximum nominal particle size of not less than 26.5 mm. Determination of the composition of asphalt concrete, including its gradation composition, determination of the optimum asphalt ratio and road performance verification requirements. 【Background technique】 [0002] High modulus asphalt concrete mainly uses low-grade hard asphalt as the cementing material, relying on the high viscosity, high stiffness and low temperature sensitivity of low-grade asphalt to provide excellent high-temperature stability and high modulus for the formed asphalt mixture. When it is used in the middle and lower layers of asphalt pavement, it can improve the anti-rutting ability of the entire pavement st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC08L95/00C04B26/26C04B2111/0075C08L2555/10C04B20/0096
Inventor 王旭东傅琴周兴业陈智杰张蕾柳浩郭朝阳肖倩
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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