Detect whether the road surface is waterlogged in the microcontroller

Compaction test detection method: Compaction is the construction quality of subgrade pavement.

One of the key indicators of the test is to characterize the compactness after on-site compaction, the higher the degree of compaction, the greater the compactness, and the better the overall performance of the material. Therefore, in the construction of subgrade pavement, the rolling process has become a key process of construction quality control. 1. Standard density (maximum dry density) is determined by the standard density (maximum dry density) obtained by the laboratory test as the basis for the evaluation of compaction.

Therefore, the standard density (maximum dry density) should be determined by scientific principle, high data importance, easy operation, and the test conditions should be close to the actual compaction conditions. In recent years, vibration compaction, large-scale Marshall compaction, etc., which have gradually attracted attention, are based on the test conditions in consideration of the widespread use of vibrating rollers for rolling and forming in the current construction.

The result of the line improvement. Due to the different types of road construction materials, the test methods for determining the standard density (maximum dry density) in the room are also different. (A) subgrade soil maximum dry density determination test method according to the subgrade soil category and nature of the different, subgrade soil maximum dry density test method mainly includes compaction method, vibrating table method and surface vibration compactor method, compaction test is the main method of determining the maximum dry density of subgrade soil in China, through the test of the compaction curve, determine the best water content and maximum dry density.

According to the different compaction work, it can be divided into heavy and light compaction, the principle and basic law of the two tests are similar, but the compaction work of the heavy compaction test is doubled. According to the water content of the collected soil samples, it is divided into wet soil method and dry soil method; According to whether the soil can be reused, it is also divided into two types, that is, the soil can be reused and cannot be reused. According to the specific requirements of the project, according to the provisions of the compaction test method, select the light or heavy test method; According to the nature of the soil, the dry soil method or the wet soil method should be selected, the wet soil method should be used for the high water content soil, and the dry soil method should be selected for the non-high water content soil; Specimens can be reused, except for those that are easily crushable.

Both the shaking table method and the surface vibration compactor method use the vibration method to determine the maximum dry density of soil. The former is that the whole soil sample is subjected to vertical vibration at the same time, while the latter is the vibration transmission from the surface of the soil body vertically downward. The results show that the results of the maximum dry density test of the two methods are basically the same for the non-cohesive free-draining soil, but the test equipment and operation of the former are more complicated, and the latter is relatively easy and closer to the actual situation of on-site vibration rolling.

Therefore, it can be used according to the ownership of the test equipment, but it is recommended to give priority to the surface vibration compactor method. The existing research results at home and abroad show that for non-cohesive free-draining soils such as sand, eggs, boulders and rockfills, it is unanimously accepted that the vibration method is used instead of the ordinary compaction method. Therefore, it is recommended to use the vibration method to determine the maximum dry density of non-cohesive free-draining soil.

The standard density of the pavement base material (maximum dry density) determines the test method of the pavement base layer.

It should include two types of semi-rigid base and flexible base, of which the flexible base mainly includes the granular base represented by graded gravel and asphalt.

This kind of non-contact measurement is difficult, and using a camera to shoot AI image recognition in real time may be a more reliable solution.