The material of water-stable layer is mainly composed of granular materials and mortar volume. The granular material is graded macadam, and the mortar volume includes water and cementitious materials, and consists of cement and mixed materials.

Lime fly ash soil is a mixture of lime, fly ash and soil in a certain proportion.

Lime soil is made of clay and lime mixed with water and compacted.

2. Different uses:

Cement stabilized layer is usually used in the base and subbase of high-speed, first-class and second-class highways, and is an ideal base material for advanced pavements.

Lime-fly-ash soil cannot be used at the grass-roots level in expressway; Other highway subbase can be used.

Lime soil is generally used less, mainly in the third and fourth grades and rural roads.

3. Different characteristics:

The initial strength of the water-stable layer is high, and the strength increases rapidly with age, so the strength is high, and the impermeability and frost resistance are good. Higher than other subgrade materials. After the water is stable, it is not muddy when it rains, and the surface is solid.

Lime-fly ash soil has high strength, although its early strength is low, its later strength is high. After a period of curing, its strength gradually increased, and finally a plate with good diffusion stress, good water stability and good frost resistance was formed.

There are active iron, aluminum, amorphous clay and humus deposits in the lime-soil profile; Above this layer is a bleaching layer; The soil is wet or moist; The texture is loam or sandy; It has Levin ion exchange capacity depending on pH value and low alkali content.

Extended data:

Action principle of water-stable layer:

Cement stabilized macadam takes graded macadam as aggregate, fills the gaps of aggregate with a certain amount of cementing material and sufficient mortar volume, and spreads and compacts according to the principle of embedding and squeezing. Its compactness is close to its compactness, and its strength mainly depends on the interlocking principle between crushed stones. At the same time, there is enough mortar volume to fill the gap of aggregate.

Lime fly ash and gravel are called lime fly ash gravel soil, lime fly ash and gravel are called lime fly ash gravel soil, lime fly ash soil and fine grained soil are called lime fly ash soil, and lime fly ash and industrial waste residue are called lime fly ash. Lime-fly ash stabilized soil is used in many highway constructions (especially high-grade highways), and improved soil is also widely used in the treatment of subgrade diseases by railway departments and in the construction of new lines.

References:

Baidu encyclopedia-water stable layer

References:

Baidu encyclopedia-lime soil

References:

Baidu encyclopedia-lime soil