The relationship between the liquid plastic limit and the optimal moisture content

The liquid limit and the plastic limit are a relatively fixed value, the best moisture content is a relative value, which has a lot to do with the compaction function, the larger the compaction function, the lower the optimal moisture content, but its value is generally near the plastic limit, which is slightly larger than the plastic limit.

Cement stabilized soil mix ratio, aggregate gradation after the mix is good to do 3 cement dosage mix ratio compaction, such as, the 3 mix ratio compaction, as if the cement less, the maximum dry density is smaller, the best moisture content is smaller, no matter how the mix ratio changes, always to keep the water-cement ratio consistent, the same as the cement is the less the cement must be smaller, the same maximum dry density is smaller.

Summary. The plasticity index is calculated by ip= l- p, where: ip - plasticity index, accurate to; l - liquid limit (%)p - plastic limit (%)3, liquid index calculation il=( p) (l- p) where:

IL - liquid index, accurate to; - Natural moisture content (%)L——Liquid limit (%)P——Plastic limit (%)

How to calculate the moisture content of the specimen when the liquid limit and plastic limit are calculated in the joint experiment and the plastic limit.

When calculating the plastic limit index.

The plasticity index is calculated as ip= l- p, and the cavity is this: ip - plasticity index, accurate to; l - liquid limit (%)p - plastic limit (%)3, liquid index calculation of acacia il=( p) (l- p) where: il - liquid index, accurate hunger; - Natural moisture content (%)L——Liquid limit (%)P——Plastic limit (%)

Calculate the male shouting circular ip=wl-wp; IL = w-WP Plastic Index, IL Liquid Index Limb Sun, Zheng Hunger Collapse WP (%) plastic limit, WL (%) liquid limit, W (%) natural water content.

Natural moisture content formula doesn't have?

Good dear, I'll check it out here.

Dear, you can calculate according to this publicity: the formula for calculating the moisture content: weigh the wet soil, record the data, and then dry the soil sample and record the data.

Wet soil quality - dry soil quality = water quality, water quality dry soil quality * 100% = moisture content. The formula for calculating the actual wet density is: the total mass of the ring knife and the soil - the quality of the ring knife = the high quality of the wet soil in the ring knife, and the quality of the wet soil The volume of the ring knife = the density of the wet soil.

Calculation method of ring knife volume: the inner diameter and inner height of the ring knife should be measured with the ruler exciton, and the area of the bottom circle * the height of the ring knife = the inner volume of the ring containing the spike ruler knife. Actual honey calculation formula:

Dry density = wet density (1 + moisture content). The formula for calculating the degree of compaction: degree of compaction = actual dry density The maximum dry density of the soil sample * 100%.

1. Liquid limit refers to the plasticity of cohesive soil.

The boundary moisture content between the state and the flow state, that is, the upper limit moisture content of the plastic state, is expressed in wl and is measured as a percentage. When the moisture content of the soil increases beyond the liquid limit, the soil changes from a plastic state to a flowing state, and there is almost no bonding force between the soil particles.

2. Plastic limit The boundary moisture content of cohesive soil between the plastic state and the semi-solid state, that is, the lower limit moisture content of the plastic state. Expressed in WP, in percentages. When the moisture content of the soil decreases below the plastic limit, the soil changes from a plastic state to a semi-solid (hard) state and loses its plasticity.

The liquid limit is the upper limit of the moisture content of fine-grained soil in a plastic state.

The plastic limit is the lower limit moisture content of fine-grained soil in a plastic state.

The boundary water content of the soil from the plastic state to the flowing state is called the liquid limit.

Liquid index = (natural moisture content of soil plastic limited water content) plasticity index.

The physical state of the soil can be judged according to the liquid index, and the smaller the liquid index of the soil, the harder the soil.

The plastic limit refers to the boundary moisture content (WP) of the soil when it transitions from a plastic state to a semi-solid state.

Liquid limit, liquid index (not called liquid limit index), plastic limit and plasticity index are the main indicators to evaluate cohesive soil in soil mechanics.

The same kind of cohesive soil is in solid, semi-solid, plastic state and flow state respectively with its different water content.

The boundary water content of soil from semi-solid to plastic state is called plastic limit; The boundary water content from the plastic state to the flow state is called the liquid limit. Both the plastic and liquid limits of the soil can be obtained by experiments.

Specific definitions of liquid limit and plastic limit The purpose of the test is as follows: Fine-grained soil (soil with a particle size smaller than and an organic matter content of no more than 5% of the total mass of the sample) is in a flowing state, a plastic state, a semi-solid state and a solid state due to different moisture content. The liquid limit is the upper moisture content of the fine-grained soil in a plastic state, and the plastic limit is the lower limit moisture content of the fine-grained soil in a plastic state.

This test is to determine the liquid limit and plastic limit moisture content of fine-grained soil, which is used to calculate the plasticity index and liquid index of soil, and provides a basis for dividing the engineering category of soil and determining the state of soil.

The specific definition of the antenna station represents a different operation, one is liquid, and the other is Suxian.