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High-modulus asphalt pavement construction method based on heavy traffic

A technology of asphalt pavement and construction method, applied in the field of pavement construction, can solve the problems of inaccurate results, human damage, discomfort of construction personnel, etc., and achieve the effects of accurate measurement results, reduced workload, and improved comfort

Active Publication Date: 2021-10-29
CHINA COMM NORTH ROAD & BRIDGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the process of rolling asphalt mixture, the temperature of asphalt mixture in the rolling process is mainly judged comprehensively by observing the color, compaction and coating uniformity of the asphalt mixture with the naked eye, but the above-mentioned judgment methods are often The results are inaccurate, making it impossible for construction personnel to clearly grasp the real temperature of the asphalt mixture during rolling;
[0005] Or the construction personnel use the plug-in metal detector to measure the temperature of the asphalt mixture during the rolling process. Although this method can accurately measure the temperature of the asphalt mixture during rolling, the measurement position and the The measurement frequency cannot be guaranteed, and the installation and construction requirements cannot be standardized to strictly implement the temperature measurement work;
[0006] Since the temperature of the asphalt mixture that has just been paved is very high (above 100 degrees), the manual insertion measurement method makes the construction workers suffer from high temperature, and the gas generated by the volatilization of the asphalt mixture also has a greater impact on the human body. Damage, long-term exposure to this environment can easily cause discomfort to construction workers;

Method used

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  • High-modulus asphalt pavement construction method based on heavy traffic
  • High-modulus asphalt pavement construction method based on heavy traffic
  • High-modulus asphalt pavement construction method based on heavy traffic

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, this embodiment provides a high modulus asphalt pavement construction method based on heavy-duty traffic, including the following steps:

[0037] Step 1: According to the technical requirements of the design, dry mix the corresponding amount and proportion of coarse aggregate, fine aggregate, filler and high modulus agent, keep the dry mixing temperature at 175°-185° and the dry mixing time for 10-15s ;

[0038] Step 2: Add liquid asphalt to the dry-mixed aggregate and stir for 45-53s within the range of 165°-175°;

[0039] The third step: paving at a temperature of 155°-160° by a paver;

[0040] Step 4: Follow the road roller for rolling after the paver and ensure that the temperature inside the asphalt mixture during rolling is not lower than 150°;

[0041] Note: When the road roller is rolling the asphalt mixture, it should maintain a uniform speed for rolling

Embodiment 2

[0042] Embodiment 2, on the basis of Embodiment 1, the rolling temperature of the asphalt mixture in the fourth step of the above-mentioned embodiment is measured by an insertion thermometer with a metal detection needle;

[0043] Note: When the metal probe is inserted into the measurement, mechanical equipment should be used instead of manual measurement to avoid the high temperature of the asphalt mixture and its volatilized pungent gas from causing damage to the construction personnel's body;

[0044] Moreover, during the rolling process of the asphalt mixture by the road roller, the temperature of the asphalt mixture should be periodically measured at a certain frequency, so that the construction personnel can grasp the internal temperature of the asphalt mixture in real time during the rolling process, so as to facilitate The construction conditions shall be adjusted accordingly (considering the insulation treatment of the asphalt mixture during transportation and the cont...

Embodiment 3

[0045] Embodiment 3, this embodiment provides an implementation of measuring the internal temperature of asphalt mixture, specifically as follows:

[0046] as attached figure 1 As shown, the rolling roller 1 is included and the rolling roller 1 is driven by the road roller (the overall view of the road roller is not shown here, it is the prior art), the improvement of this embodiment is that, as attached figure 2 As shown in , we have a detachable semicircular plate 2 on the lateral side of the rolling roller 1 (the semicircular plate 2 is fixed and installed coaxially with the rolling roller 1) and the semicircular plate 2 is slid along its radial direction. Elastically connected measuring frame 3, on the semicircular plate 2, an active plate 5 is installed along its radial direction, and an active spring 6 is connected between the active plate 5 and the semicircular plate 2, as attached image 3 As shown, the active plate 5 drives the driven plate 7 which is slidably insta...

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Abstract

The invention relates to a high-modulus asphalt pavement construction method based on heavy traffic. The problem that the temperature in an asphalt mixture during rolling cannot be measured efficiently and accurately during construction of an existing high-modulus asphalt pavement is effectively solved. According to the technical scheme, the method comprises the following steps: in the process that a road roller rolls a paved asphalt mixture, walking of a steel wheel of the road roller is utilized to drive a temperature measuring device to synchronously and automatically measure the temperature of the asphalt mixture at fixed frequency intervals, in the measuring process, a temperature measuring device can be pulled out after staying in the asphalt mixture for a certain time, and thus the measuring result is more accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of pavement construction, and in particular relates to a high-modulus asphalt pavement construction method based on heavy-duty traffic. Background technique [0002] At present, high modulus asphalt mixture is mainly mixed with high modulus agent in the process of mixing the mixture to improve the modulus of asphalt mixture, which can improve the fatigue resistance and impact resistance of the road surface, and reduce the road surface under the heavy pressure of vehicles. The amount of deformation, thereby reducing the damage to the asphalt pavement, thereby improving the overall strength performance of the pavement. Therefore, in some busy roads with many vehicles, high-modulus asphalt mixtures are often used for pavement pavement to deal with heavy traffic tasks. conditions, thereby prolonging the service life of the road; [0003] The construction of high modulus asphalt mixture covers asphalt mixture mi...

Claims

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Application Information

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IPC IPC(8): E01C19/48E01C19/23E01C19/00
CPCE01C19/4826E01C19/236E01C19/48E01C19/00
Inventor 张志强陈冬段鑫明翟新瑞
Owner CHINA COMM NORTH ROAD & BRIDGE