Why is the larger the liquid limit of the soil, the more unfavorable it is for construction? In laym

Because when the moisture content of the soil.

When the liquid limit is exceeded, the soil changes from a plastic state to a flowing state, and there is almost no binding force between the soil particles.

Cohesive soil due to water content.

It is divided into solid, plastic state and flow state, which is the consistency state of cohesive soil. The critical water content between different consistency states is called the boundary water content, and the boundary water content varies greatly with the clay content and mineral composition, which also reflects the significant differences in engineering geological properties.

Therefore, the boundary water content and the relationship between the boundary water content and the natural water content, i.e., the plasticity index.

and the liquid index, often used as a classification of soil and to determine the bearing capacity of the foundation.

important parameters.

Cohesive soils in their natural state have a certain structure. When disturbed by external factors, the cemented substances between soil particles, soil particles, ions, and water molecules.

The composition of the equilibrium system is destroyed, and the strength and compressibility of the soil are reduced. This effect of the structure of the soil on the strength is generally reflected by sensitivity.

The liquid limit index is the ratio of the difference between the natural water content and the plastic limit to the plasticity index. The larger the ratio, the smaller the numerator denominator in the ratio, the physical meaning is that this kind of soil must increase the large water content to enter the plastic state, and once it enters the plastic state, it will soon enter the flow plastic state, this process is very short, so the larger the liquid limit index, the softer the soil. The three indexes for judging high liquid confined soil in the project are:

Less than the particle content is greater than 50%, the liquid limit is greater than 50%, and the plasticity index is greater than 26. In addition to having the characteristics of water expansion and water loss contraction, the more important feature is that the compaction of high liquid limited soil is poor, and the compressibility of the soil after compaction is still large, the bearing capacity is poor, and there is obvious strain softening.

The liquid limit is the water content of the soil from the flow state to the plastic state, and the plastic limit is the water content of the soil from the plastic state to the solid state.

The difference between the liquid limit and the plastic limit. It is the plasticity index of the soil.

Once you know the definition, you can summarize it yourself. Why is the larger the liquid limit, the more unfavorable it is for construction?

The larger the liquid limit, the more water can be contained in the soil before it becomes liquid, and the greater the water content, the more unfavorable it is to the construction.

To put it simply, do you think thin mud is good for construction?