As the main mechanical tool in road construction, road roller is widely used in various road construction. Do you know how the moisture content of soil affects the compaction process of the roller? Next, Jinan roller rental manufacturer will explain to you.
In the process of compaction, the water content of soil or material plays a very important role in the compactness that can be achieved. The work of hammering or rolling needs to overcome the internal friction resistance and cohesion between the soil particles, so that the soil particles can move and close to each other. The internal friction resistance and cohesion of soil increase with the compactness. When the water content of soil is small, the internal friction resistance between soil particles is large. After compaction to a certain degree, a certain compaction work can no longer overcome the resistance of soil, and the dry density obtained by compaction is small.
When the water content of the soil increases gradually, the water plays a lubricating role between the soil particles, which reduces the internal friction resistance of the soil. Therefore, the same compaction work can obtain larger dry density. In this process, the volume of air in the unit soil gradually decreases, while the volume of solid and water gradually increases. When the water content of soil continues to increase beyond a certain limit.
Although the internal friction resistance of soil is still decreasing, the volume of air in unit soil has been reduced to a minimum, while the volume of water is increasing. Because water is incompressible, the dry density of soil decreases gradually under the same compaction work.
Such a close relationship between dry density and water content of soil forms a hump-shaped compaction curve. Therefore. Fine grain VII, natural gravel soil, laterite gravel, graded gravel, graded gravel, lime stabilized soil, cement stabilized soil and other pavement materials can be compacted to large dry density only under certain water content.
At the construction site, it is difficult to achieve high compactness by rolling the soil or graded aggregate with too small water content with a certain roller; If the moisture content of the soil exceeds the optimum value, it is also difficult to achieve greater compaction. Therefore, in the special arid and humid areas, when appropriate measures cannot be taken or cannot be taken, the requirements for compactness should not be reduced in actual construction. Come to our website for more relevant content http://www.ycgjglcl.com Ask!