Panax notoginseng ash soil uses quicklime or hydrated lime?

1. The process of quicklime becoming mature lime:

ca0+h20->ca(oh)2+

The volume increased by 1 3 times, the apparent density, 630kg of quicklime per cubic meter.

Then it is calculated that 1m3 of quicklime is produced.

Quicklime is used in the ash soil.

Quicklime. The optimal volume ratio of lime to soil is 3 7, commonly known as Panax notoginseng ash. The lime used in the ash soil is best to use finely ground quicklime powder, or the ash is poured with an appropriate amount of water, and it is placed for 24 hours to form powdered slaked lime.

The ash soil with high compaction has high strength and good water stability. The compactness can be controlled by dry bulk density.

The compressive strength of the 28-day-old soil can reach about MPa, and the compressive strength of the 200 300-year-old soil can be as high as 8 10 MPa.

The deformation modulus of Panax notoginseng ash soil, whether made of sub-clay or clay, is 10 15 MPa after 48 hours of immersion after 7 days of indoor curing, and 32 40 MPa after 48 hours of water immersion for 28 days.

Panax notoginseng ash has strong strength after rolling and compacting, and can resist dynamic load and earth pressure as a part of the roadbed or pavement, and can also play a role in preventing seepage.

Physical and mechanical properties of ash soil: Soil and lime are the two basic components that make up ash soil. Clayey soils have fine particles and high activity, so their strength is higher than that of sandy soils. In general, the strength of the ash prepared with cohesive soil is 1 2 times higher than that of the sandy soil.

Lime and soil must be sifted. The particle size of the soil shall not be greater than 15 mm; The ash particles must not be larger than 5 mm. It must be mixed evenly and the optimal moisture content must be controlled as the moisture content standard of the ash soil.

Before the ash goes down into the foundation groove, the bottom of the foundation groove should be rammed once, and then the mixed ash should be poured into the groove according to the designated place, but the ash shall not flow into the groove along the groove.

When the ash is rammed manually, the first layer is 25 centimeters of virtual soil, the second layer is 22 centimeters, the subsequent layers are 21 centimeters, and they are all 15 centimeters after tamping. The use of frog ramming whiskers to pave 20-25 cm of soil.

Tamping is the key to ensuring the quality of the ash foundation. In the past, wooden rammers and iron kilns were used for construction tools. When ramming, it is required that the ramming nest and the kiln flower are overlapping with each other. The number of times of ramming is subject to the value specified in the specification for the dry bulk density of the ash.

After the tamping is completed, it should be covered in time to prevent sun and rain.

The strength of ash increases with the increase of ash content within a certain range. However, when the limit is exceeded, the strength of the ash will be reduced. This is because slaked lime will separate water during calcification, which increases the plasticity of slaked lime.

Precautions for the construction of Panax notoginseng ash filling.

1.In the construction, the original record should be carefully made, the accumulation of data should be carefully carried out, and the deformation observation should be carefully carried out in the construction of the roadbed, and the construction should be controlled and guided.

2.Pay attention to weather changes during construction, and make arrangements and preparations for construction work in the rainy season in advance. The filler of the roadbed filling on the same day should be paved and rolled on the same day.

3.After the Panax notoginseng ash is filled to the design height, the slope is cleaned according to the width of the roadbed, the thickness and slope of the reserved slope soil, and the excess filler is cleaned and transported away, so that the slope is neat and beautiful. Slope renovation should be combined with slope protection, timely construction of drainage system, and ensure that the ditch drainage is smooth.

You are talking about a kind of foundation treatment, Panax notoginseng ash is a slow chemical change process with the accumulation of time will gradually change to rock, compared to pile foundation, sand and gravel foundation is much more economical.

The volume ratio of quicklime cubes and earthwork in the panax notoginseng ash soil per cubic meter is 3 7, so it is commonly known as notoginseng ash soil according to this ratio.

Quota dosage: tons of lime, tons of clay.

However, from the perspective of fixed consumption, 3:7 ash per cubic meter contains tons of lime and tons of clay, which is about equal to 3 7 =. From this point of view, it should actually be the weight ratio.

Production process. The original lime production process was to lay limestone and fuel (wood) in layers, and then calcined for a week. In modern times, mechanized and semi-mechanized vertical kilns, rotary kilns, boiling furnaces and other equipment are used for production.

The calcination time is also shortened correspondingly, and it only takes 2 to 4 hours to produce lime with rotary kiln, which can improve the production efficiency by more than 5 times compared with vertical kiln production. In addition, there are processes and equipment with significant energy-saving effects, such as cross-flow type, double-slope type, oil-fired circular vertical kiln and short-rotary kiln with preheater, and the fuel has also been expanded to coal, coke, heavy oil or liquefied gas.

Quicklime cubes in notoginseng ash soil per cubic meter, earthwork. The optimal volume ratio of lime to soil is 3 7, commonly known as Panax notoginseng ash. Panax notoginseng ash refers to the volume ratio, and the self-weight of quicklime powder is calculated by 12kn m3; The dead weight of the clay is calculated as 16kn m3.

In 1 cubic meter of Panax notoginseng ash, 360kg of white ash (quicklime powder) and 1120kg of clay. Quota dosage: tons of lime, tons of clay.

However, from the perspective of quota consumption, the loss of 3:7 tons of lime and clay per cubic meter of stuffy rubber cover is about equal to 3 7 =. From this point of view, it should actually be the weight ratio.

Question 1: What is Panax notoginseng ash? Panax notoginseng ash is used as a foundation cushion, which is made by mixing a certain amount of lime and soil for curing and tamping, and its strength grows slowly over time, and the building ash soil is the volume ratio. Municipal road ash is the mass ratio.

Question 2: What is the use of Panax notoginseng ash soil Panax notoginseng ash has strong strength after rolling and compacting, as a part of the roadbed or pavement, it can resist dynamic load and earth pressure, and can also play a role in preventing seepage.

Question 3: What kind of ash is Panax notoginseng ash The existing cohesive soil in the site is used. Lime is made of hydrated lime powder, and the lime grade shall not be less than the grade, requiring the same origin, the same variety, and the same specification, every 200t is a batch, and 200t is not sold roughly.

After selecting the qualified soil and lime, do a 3:7 ash compaction test, and the inspection quantity is inspected once every 2000m3 (heavy compaction), so as to carry out construction quality control. In particular, the control of water content is a key link, combined with the parameters of the ash compaction test report, the water content is generally controlled at 20% 23%, and the maximum is not more than 24%.

Before construction, according to the characteristics of the project, the design compaction coefficient, the type of soil material, the construction conditions, etc., the soil moisture content control rock regulation range, the thickness of the paved soil and the tamping and rolling variables and other parameters should be reasonably determined.

Question 4: What is 3:7 Gray Soil 3 is white lime 7 is Soil.

Question 5: What is the need for Panax notoginseng ash backfill original ground treatment and foundation treatment. That is, to dig out the unqualified soil or silt and replace it with notoginseng ash.

Question 6: Is this the dust of Sanqi? Hello, Panax notoginseng ash refers to lime and soil in accordance with 3:

7 proportions of mixed building materials, generally do not contain stones. At the same time, there are twenty-eight gray soils and four or six gray soils, so the difference is not big and generally cannot be seen. Thank you!

Summary. Hello, no, no, Panax notoginseng ash is calculated by volume, that is, one cubic of Panax notoginseng ash contains dry lime cubic <>

Hello, no, no, Panax notoginseng ash is calculated by volume, that is, one cubic of Panax notoginseng ash contains dry lime cubic <>

Panax notoginseng ash can be replaced with concrete. The strength of Panax notoginseng ash itself is not as high as that of concrete, and the concrete soil can completely replace the Panax notoginseng ash soil. The design of the ash itself is to reduce the cost, and the design strength of the ash can be achieved, and if it is concrete, the cost is too high.

But remember that concrete can replace Panax notoginseng ash, but Panax notoginseng ash cannot replace concrete.