What exactly is it?

Concrete, as its name implies, is a kind of building material which is mixed and rammed by three materials, and there are different concretes in different regions. However, slaked lime is indispensable. Concrete exists in an era when there is no cement or cement, so it is wrong to say that there is cement in concrete.

There are a lot of "sub-clay" commonly known as "loess" and "red soil" in the geology of China. Where there is mud, the materials of Sanhe land are: mud, hydrated lime and sand. Its actual proportion depends on the sediment concentration of the soil. That is to say, if the sediment content in the soil is high, the amount of sand will decrease. Generally, hydrated lime accounts for 30%.

Cement, sand or young stone powder and pebble (mostly10,20 20cm)

The main ratio is: 1 (cement): 1 (sand or young stone powder): 2 (pebbles)-this ratio is the strongest, 1:2:4, 1:3:6.

Of course, there are more, those are professionally prepared.

Lime fly ash soil is an inorganic material mixed by lime and fly ash in a certain proportion. In recent twenty years, lime and fly ash have become more and more common to be added to natural fine-grained soil or clay as stabilizing materials, especially in subgrade construction of road engineering, which is mainly due to the large amount of subgrade filler, wide sources of lime and fly ash, low price, simple construction, good mechanical properties and water stability, and has become an important method to improve soil. Lime-fly ash stabilized soil is used in many highway constructions (especially high-grade highways) in China, and improved soil is also widely used in the treatment of subgrade diseases by railway departments and in the construction of new lines. At the same time, it should be noted that there are many and complicated factors affecting the strength and density of lime-fly ash soil. If you don't master it well, it will affect the quality and lead to failure. The purpose of this paper is to discuss the optimal selection and time effect of lime-fly ash soil ratio, and to provide theoretical basis for the application of lime-fly ash soil in loess foundation treatment.