A multi-stage construction control method for emulsified asphalt cold recycled mixture

A technology of cold recycled mixture and emulsified asphalt, which is applied in the field of controlling the quality of the emulsified asphalt cold recycled layer and the construction progress of the overlying layer, and the construction control field of the emulsified asphalt cold recycled mixture, and can solve the problem that the cold recycled asphalt cannot be effectively controlled Problems such as construction quality and progress of the first floor, to achieve a reasonable effect of the control method

Active Publication Date: 2017-06-23
BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for controlling the construction of emulsified asphalt cold recycled mixture, which can effectively control the construction quality of emulsified asphalt cold recycled mixture, determine the time for paving the overlying layer, and solve the problem that the existing control methods cannot effectively control emulsification Problems of Construction Quality and Progress of Asphalt Cold Reclaimed Layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. Beijing-Shenyang Expressway Auxiliary Road Emulsified Asphalt Cold Recycling Project

[0027] Indoor calibration:

[0028] (1) Mix the emulsified asphalt cold recycled mixture according to the designed gradation, form 8 Marshall test pieces, and compact 50 times on both sides.

[0029] (2) Put the molded specimen into a ventilated oven at 60°C for 48 hours.

[0030] (3) Take 4 test pieces after the end of the health preservation, double-sided repair 25 times, and demould after cooling to room temperature. Refer to the test method described in JTG E20-T0706 of "Test Regulations for Asphalt and Mixtures in Highway Engineering" to test the bulk density of the specimen, denoted as ρ 3 =2.238g / cm 3 .

[0031] (4) Take another 4 specimens, cool to room temperature and demould, the gross bulk density of the specimens is ρ 2 =2.198g / cm 3 .

[0032] (5) Calculate the initial density ρ of the specimen according to the parameters of the undamaged specimen 1 .

...

Embodiment 2

[0038] Example 2. Pinggu Huaxi Road Project

[0039] Indoor calibration:

[0040] (1) Mix the emulsified asphalt cold recycled mixture according to the designed gradation, form 8 Marshall test pieces, and compact 50 times on both sides.

[0041] (2) Put the molded specimen into a ventilated oven at 60°C for 48 hours.

[0042] (3) Take 4 test pieces after the end of the health preservation, double-sided repair 25 times, and demould after cooling to room temperature. Refer to the test method described in JTG E20-T0706 of "Test Regulations for Asphalt and Mixtures in Highway Engineering" to test the bulk density of the specimen, denoted as ρ 3 =2.282g / cm 3 .

[0043] (4) Take another 4 specimens, cool to room temperature and demould, the gross bulk density of the specimens is ρ 2 =2.264g / cm 3 .

[0044] (5) Calculate the initial density ρ of the specimen according to the parameters of the undamaged specimen 1 .

[0045] ρ 1 =m / (πr 2 h) = 2.081g / cm 3

[0046] On-site de...

Embodiment 3G107

[0050] Example 3. G107 National Highway Overhaul Project

[0051] Indoor calibration:

[0052] (1) Mix the emulsified asphalt cold recycled mixture according to the designed gradation, form 8 Marshall test pieces, and compact 50 times on both sides.

[0053] (2) Put the molded specimen into a ventilated oven at 60°C for 48 hours.

[0054] (3) Take 4 test pieces after the end of the health preservation, double-sided repair 25 times, and demould after cooling to room temperature. Refer to the test method described in JTG E20-T0706 of "Test Regulations for Asphalt and Mixtures in Highway Engineering" to test the bulk density of the specimen, denoted as ρ 3 =2.266g / cm 3 .

[0055] (4) Take another 4 specimens, cool to room temperature and demould, the gross bulk density of the specimens is ρ 2 =2.219g / cm 3 .

[0056] (5) Calculate the initial density ρ of the specimen according to the parameters of the undamaged specimen 1 .

[0057] ρ 1 =m / (πr 2 h) = 2.189g / cm 3

[0...

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Abstract

The invention provides a multistage construction control method for a cold-reclaimed emulsified asphalt mixture. The method is characterized by comprising the following steps: indoor calibration, which includes the following sub-steps: (1) molding a specimen, (2) carrying out preservation, and (3) testing the density, and field detection, which includes the following sub-steps: (1) detecting the compactness after grinding is ended, (2) detecting the compactness after preservation is ended, and (3) detecting the compactness after an overlying layer is paved. According to the method provided by the invention, the quality of a cold-reclaimed layer of emulsified asphalt and the construction progress of the overlying layer can be controlled; and roads of Beijing-Shenyang side road overhauling engineering, Pingguhua west road engineering and the like employing the control method are good in service condition, which proves that the control method provided by the invention is reasonable, reliable and practical.

Description

technical field [0001] The invention relates to a method for controlling the construction of emulsified asphalt cold recycled mixture, especially a method for controlling the quality of emulsified asphalt cold recycled layer and the construction progress of an overlying layer, which belongs to the technical field of highway pavement construction control. Background technique [0002] The design service life of asphalt pavement is generally 8 to 15 years. From now on, about 10% of the asphalt pavement will enter the maintenance or reconstruction cycle every year, and the old asphalt mixture will reach millions of tons every year. If these waste asphalt pavement materials can be recovered and recycled, at least hundreds of millions of yuan in material expenses will be saved every year, and with the continuous construction of infrastructure, this figure is still growing at a rate of about 15% per year. [0003] The emulsified asphalt cold recycling technology is to mill, crush ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/42
CPCG01N33/42
Inventor 柳浩王真杨丽英董雨明李振佟禹徐世法索智许鹰金珊珊
Owner BEIJING MUNICIPAL ROAD & BRIDGE BUILDING MATERIALGRP
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