A method for quickly judging whether hot mix asphalt mixture can be implemented in winter

Abstract

The invention relates to a method for quickly judging whether hot-mix asphalt mixture can be implemented in winter. S01 adopts hot-mix warm-press technology to conduct asphalt mixture paving test, and obtains the time required for the entire process of asphalt mixture; S02 records the time required for the asphalt mixture. The amount of warm mix agent, the initial temperature value and the final temperature value before the test; S03 refers to the pavement design standard, the amount of warm mix agent recorded in the test, the initial temperature value, the final temperature value and the required time, and the corresponding temperature value and wind speed value, and express the obtained temperature value and wind speed value on the coordinate axis to obtain a three-color map; S04 according to the actual weather conditions, obtain the weather temperature parameters and wind speed parameters on the test day, and compare the Corresponding temperature value and wind speed value, determine whether it can be implemented. The present invention can judge whether it can be implemented through numerical comparison, which not only facilitates the organization and management of the construction unit, but also precisely controls the construction progress and improves the winter construction management level.

Description

technical field [0001] The invention relates to the technical field of winter implementation of asphalt pavement, in particular to a method for quickly judging whether a hot asphalt mixture can be implemented in winter. Background technique [0002] According to the "Construction Regulations for Winter Construction of Construction Engineering (JGJ 104-2011)" and the statistics of local meteorological data for many years, when the daily average outdoor temperature is stable below 5°C for 5 consecutive days, the winter construction period will begin. The purpose of national regulations defining winter construction is to ensure the quality of winter engineering construction, and for our road paving operations, the requirements are more stringent. "Code for Construction and Quality Acceptance of Urban Road Engineering" (CJJ1-2008) stipulates that "conventional hot-mix asphalt paving construction shall not be carried out when the temperature is lower than 10°C". The reason why t...

AI Technical Summary

Problems solved by technology

The reason why the national regulations have such strict restrictions on the construction period in winter is that improper construction in winter is more likely to cause various diseases and seriously affect the quality of the project.

For example, using conventional technology to pave roads in winter will make it difficult for the asphalt pavement to be compacted, resulting in problems such as insufficient compaction and water seepage, which in turn will cause a series of early diseases

[0003] However, in actual engineering construction, due to factors such as the construction period, it is inevitable to carry out asphalt mixture paving operations in winter. In order to ensure the construction quality, special winter construction technical measures and management measures are required, such as: strengthening construction management, Measures such as increasing three temperatures (production temperature, factory temperature and construction temperature), heat preservation covering transportation, "three quick and two timely", namely "quick unloading, quick flattening, quick pressing" and "timely rolling and timely forming", but these The measures still have some disadvantages, such as: increasing the discharge temperature of the mixture will inevitably accelerate the aging of the asphalt, causing early damage such as cracks, and accelerating the speed of rolling and paving is not conducive to construction quality control, etc.

In addition, when the weather conditions are too harsh, construction cannot be carried out even if corresponding technical and management measures are taken; Normal construction is possible. At present, there is no clear boundary for reference in the industry, which leads to extremely unfavorable management of asphalt pavement construction in winter

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