中文 English

Business News

News

Current location:Home>News Media>Business News

Quality control of cold recycling construction of old pavement
Release time:2017-6-14 10:06:54           Clicks:999

Quality control of cold recycling construction of old pavement

In recent years, China's highway development is very rapid, with the increasing traffic volume, a large number of highway is close to the design service life, the need for major repair or renovation, cold regeneration technology is the most suitable for the repair or renovation. Field cold recycling technology can not only save energy, reduce construction costs, but also more conducive to environmental protection. Combined with the reconstruction project of the Tang line, cold reclaimed pavement was used to treat the old pavement surface and the base layer, and good results were achieved. Cold recycling base refers to the original old pavement surface and base with special pavement recycling machine, crushing in a certain thickness, while adding new aggregates, binder of certain specifications and quantity of (cement), according to a certain proportion after mixing, shaping, rolling, restore to the road base or bottom the basic technical requirements of the construction process. Field cold recycling technology can not only save energy, reduce construction costs, but also more conducive to environmental protection. Below is in the Tang line reconstruction project site cold recycling technology analysis as follows:

1, recycling old situation

In the Tang line, the total length of the reconstruction project is 29.374km, of which the k0+000-k8+850 section is subjected to cold regeneration construction, and the width is 7m. The original pavement surface is 3cm asphalt macadam, the base is 15cm lime stabilized soil, and the cold recycling treatment of the old road depth is 18cm.

2 、 old road cold recycling construction quality control 2.1 test room to determine cold recycling construction technical indicators

In view of the fact that the present cold recycling test is not required by the state, the test shall be conducted in accordance with the highway geotechnical test regulations (JTJ051-93) and the highway engineering inorganic aggregate stabilized material test regulations (JTJ057-94).

(1) in the Tang line reconstruction project, cold recycling technology for the old pavement surface, the base for the regeneration of grass-roots level, the design strength of 1.5MPa. Through the analysis of existing materials, the method of adding adhesive (cement) is adopted to ensure the strength of the base.

(2) the proportion of cement to be chosen is 3%, 4%, 5% and 6%. The amount of cement is determined by compaction test and unconfined compressive strength test, and the test results are shown in table 1. Test results of compaction and unconfined compression strength table 1

(3) after the test room confirmed that cold recycled cement dosage 5%, the construction process, according to 6% control, 200m test section construction, the degree of compaction, strength and other indicators have reached the design requirements. 2.2 crushing, mixing and shaping of old road surface


More:
Up:My company cold recycling machine to Southeast Asia Construction
Next:400 cold recycling machines depart from Hefei

Contact Us

Address: No.2, Xuezhuang Road, Tangzhang Industrial Park, Tongshan District, Xuzhou, Jiangsu Province.

Tel: 0516-83098828

Mobile

Copyright © 2016 All Rights Reserved Copyright:Jiangsu Deli Heavy Industry Co., Ltd. 苏ICP备11000607号 Platform support: Technical support: