Hardening cement soil temporarily built on construction site and preparation method of hardening cement soil

Abstract

The invention discloses hardened cement soil temporarily built on a construction site and a preparation method thereof, and belongs to the field of building construction. According to the cement soil technology, earthwork excavated on site is matched with cement and stone powder in a certain proportion, and the cement soil material with certain strength is manufactured in a site mixing mode. According to the cement soil technology, the use amount of on-site temporary construction concrete can be effectively reduced, the generation amount of construction waste is reduced, in addition, the technology is simple and convenient, the cost is reduced, meanwhile, on-site large-area hardening can be achieved, and the on-site safe and civilized construction image is improved. The form of on-site mixing of earthwork, cement and stone powder is adopted, compared with commercial concrete, the cost is lower, and the concrete can be directly used for backfilling after being broken in the later period.

Description

Technical Field

[0001] The invention belongs to the field of building construction, and is particularly related to a cement soil technology used for temporary hardening at a construction site. Background Art

[0002] The traditional construction site uses commercial concrete for temporary site hardening, which is very expensive. After the construction of the later project is completed, the temporary project will generate a large amount of construction waste that needs to be transported out, which is costly and not environmentally friendly. Therefore, there is an urgent need for a temporary construction hardening cement soil technology that can reduce costs and can harden a large area on site. Summary of the invention

[0003] In view of the existing problems, the present invention aims to provide a cement soil for temporary hardening at a construction site and a preparation method thereof.

[0004] To this end, the present invention adopts the following technical scheme: a method for preparing cement soil for temporary construction and hardening at a construction site, which uses soil excavated on site as the main material, mixes a certain proportion of cement and stone powder, and mixes them on site to make a cement soil material with strength.

[0005] The mix ratio of the cement soil material is calculated by weight ratio, cement: silty sand: water: stone powder = 1:2.452:0.5:3.770, where the cement variety is selected as PO42.5. During implementation, according to the area and thickness of the site to be hardened, the required amount of various materials is calculated according to this mix ratio to ensure that the performance of the cement soil material meets the hardening requirements.

[0006] According to the area and thickness of the site to be hardened, the required amount of various materials is calculated according to the mix ratio of the cement soil material; when the volume is small, manual mixing can be used, and when the volume is large, an excavator is used for mixing; first, cement, stone powder, and silty sand are evenly mixed according to the amount of the mix ratio, and then the mixed materials are spread to the area planned to be hardened according to the construction plan, and rolled flat; then, according to the amount of water in the mix ratio, water is evenly spread on the cement soil material.

[0007] When preparing raw materials, stone powder and silty sand must not contain garbage or other materials that affect mixing and strength; control the moisture content of the soil, which should generally be lumpy when held in the hand and fall to the ground; prepare cement grades according to the mix ratio; use tap water for mixing.

[0008] The cement soil technology is used for hardening temporary sites with low ground strength requirements, such as temporary material yards at construction sites, internal and external scaffolding foundations, and bare soil in construction interval areas.

[0009] The present invention can achieve the following beneficial effects: 1. The present invention uses the earth excavated on site to mix a certain proportion of cement and stone powder, and produces cement soil materials with a certain strength through on-site mixing. The cement soil formed by the mixing of the present invention can be used for hardening temporary sites with low ground strength requirements such as temporary material yards at construction sites, internal and external frame foundations, and bare soil in construction interval areas. The present invention can effectively reduce the use of temporary concrete on site and reduce the amount of construction waste generated. The process is simple and cost-effective, and large-scale hardening can be achieved on site, thereby improving the image of safe and civilized construction on site.

[0010] 2. The present invention uses earth excavated on site as the main material of cement soil, which reduces the amount of earth transported outside and reduces the material cost. The present invention adopts the form of mixing earth with cement and stone powder on site, which is lower in cost than commercial concrete, and can be directly used as backfill after being broken later, reducing the amount of construction waste generated. For areas with large areas such as material yards and bare soil in construction intervals, the use of cement soil can effectively reduce the impact of dust, which is conducive to environmentally friendly construction. DETAILED DESCRIPTION

[0011] The specific implementation modes of the present invention are described in detail below. The described embodiments are only for illustration and explanation of the present invention and do not constitute the sole limitation of the present invention.

[0012] Embodiment 1:

[0013] The earth excavated on site is mixed with a certain proportion of cement and stone powder to produce cement soil materials with a certain strength through on-site mixing.

[0014] The cement-soil mix ratio is:

[0015] Table 1: Cement mix ratio Table 1

[0016] Material Name cement Silty sand water Stone powder Variety specifications PO42.5 Silty sand water Stone powder <![CDATA[Material consumption (kg / m 3 )]]> 660 1722 165 0 Weight Ratio 1 2.61 0.25 0

[0017] During the actual implementation on site, the amount of various materials required is calculated according to the area and thickness of the site to be hardened and the cement-soil mix ratio table. When the volume is small, manual mixing can be used, and when the volume is large, an excavator can be used.

[0018] Prepare raw materials such as cement, stone powder, silty sand and soil in advance. The requirements are as follows:

[0019] 1. Stone powder and silty sand shall not contain garbage or other materials that affect mixing and strength;

[0020] 2. Control the moisture content of the soil. The soil should be held in a ball and then fall to the ground;

[0021] 3. Prepare cement grade according to cement-soil mix ratio table;

[0022] 4. Use tap water for mixing;

[0023] After the materials are prepared, first mix the cement, stone powder, and silty sand evenly according to the amount specified in the cement-soil mix ratio table, then spread the mixed materials to the planned hardening area according to the construction plan and roll them flat. Sprinkle water evenly on the cement-soil material according to the amount of water specified in the cement-soil mix ratio table.

[0024] Note: 1. Cement soil should not be constructed on rainy days;

[0025] 2. Mix all kinds of materials evenly first, spread them to the area to be hardened and then add water;

[0026] Embodiment 2:

[0027] The earth excavated on site is mixed with a certain proportion of cement and stone powder to produce cement soil materials with a certain strength through on-site mixing.

[0028] The cement-soil mix ratio is:

[0029] Table 2: Cement mix ratio Table 2

[0030] Material Name cement Silty sand water Stone powder Variety specifications PO42.5 Silty sand water Stone powder <![CDATA[Material consumption (kg / m 3 )]]> 330 1431 165 622 Weight Ratio 1 4.34 0.5 1.88

[0031] During the actual implementation on site, the amount of various materials required is calculated according to the area and thickness of the site to be hardened and the cement-soil mix ratio table. When the volume is small, manual mixing can be used, and when the volume is large, an excavator can be used.

[0032] Prepare raw materials such as cement, stone powder, silty sand and soil in advance. The requirements are as follows:

[0033] 1. Stone powder and silty sand shall not contain garbage or other materials that affect mixing and strength;

[0034] 2. Control the moisture content of the soil. The soil should be held in a ball and then fall to the ground;

[0035] 3. Prepare cement grade according to cement-soil mix ratio table;

[0036] 4. Use tap water for mixing;

[0037] After the materials are prepared, first mix the cement, stone powder, and silty sand evenly according to the amount specified in the cement-soil mix ratio table, then spread the mixed materials to the planned hardening area according to the construction plan and roll them flat. Sprinkle water evenly on the cement-soil material according to the amount of water specified in the cement-soil mix ratio table.

[0038] Note: 1. Cement soil should not be constructed on rainy days;

[0039] 2. Mix all kinds of materials evenly first, spread them to the area to be hardened and then add water;

[0040] Embodiment 3:

[0041] The earth excavated on site is mixed with a certain proportion of cement and stone powder to produce cement soil materials with a certain strength through on-site mixing.

[0042] The cement-soil mix ratio is:

[0043] Table 3: Cement mix ratio Table 3

[0044] Material Name cement Silty sand water Stone powder Variety specifications PO42.5 Silty sand water Stone powder <![CDATA[Material consumption (kg / m 3 )]]> 330 809 165 1244 Weight Ratio 1 2.45 0.5 3.77

[0045] During the actual implementation on site, the amount of various materials required is calculated according to the area and thickness of the site to be hardened and the cement-soil mix ratio table. When the volume is small, manual mixing can be used, and when the volume is large, an excavator can be used.

[0046] Prepare raw materials such as cement, stone powder, silty sand and soil in advance. The requirements are as follows:

[0047] 1. Stone powder and silty sand shall not contain garbage or other materials that affect mixing and strength;

[0048] 2. Control the moisture content of the soil. The soil should be held in a ball and then fall to the ground;

[0049] 3. Prepare cement grade according to cement-soil mix ratio table;

[0050] 4. Use tap water for mixing;

[0051] After the materials are prepared, first mix the cement, stone powder, and silty sand evenly according to the amount specified in the cement-soil mix ratio table, then spread the mixed materials to the planned hardening area according to the construction plan and roll them flat. Sprinkle water evenly on the cement-soil material according to the amount of water specified in the cement-soil mix ratio table.

[0052] Note: 1. Cement soil should not be constructed on rainy days;

[0053] 2. Mix all kinds of materials evenly first, spread them to the area to be hardened and then add water;

[0054] Embodiment 4:

[0055] The earth excavated on site is mixed with a certain proportion of cement and stone powder to produce cement soil materials with a certain strength through on-site mixing.

[0056] The cement-soil mix ratio is:

[0057] Table 4: Cement-soil mix ratio Table 4

[0058]

[0059]

[0060] During the actual implementation on site, the amount of various materials required is calculated according to the area and thickness of the site to be hardened and the cement-soil mix ratio table. When the volume is small, manual mixing can be used, and when the volume is large, an excavator can be used.

[0061] Prepare raw materials such as cement, stone powder, silty sand and soil in advance. The requirements are as follows:

[0062] 1. Stone powder and silty sand shall not contain garbage or other materials that affect mixing and strength;

[0063] 2. Control the moisture content of the soil. The soil should be held in a ball and then fall to the ground;

[0064] 3. Prepare cement grade according to cement-soil mix ratio table;

[0065] 4. Use tap water for mixing;

[0066] After the materials are prepared, first mix the cement, stone powder, and silty sand evenly according to the amount specified in the cement-soil mix ratio table, then spread the mixed materials to the planned hardening area according to the construction plan and roll them flat. Sprinkle water evenly on the cement-soil material according to the amount of water specified in the cement-soil mix ratio table.

[0067] Note: 1. Cement soil should not be constructed on rainy days;

[0068] 2. Mix all kinds of materials evenly first, spread them to the area to be hardened and then add water;

[0069] The cement soil prepared in Examples 1-4 was subjected to a compressive performance comparison test according to the "Standard for Test Methods for Physical and Mechanical Properties of Concrete" GB / T50081-2019, and the cement soil test blocks were evaluated based on their compressive strength. The higher the strength, the better the molding effect.

[0070] The concrete mix ratio adopts the engineering C20 concrete mix ratio, as shown in the following table

[0071] Table 5: C20 concrete mix proportion

[0072] Material Name cement sand water Stone Variety specifications PO42.5 sand water Stone <![CDATA[Material consumption (kg / m 3 )]]> 330 809 165 1244 Weight Ratio 1 2.452 0.5 3.770

[0073] The effects of different cement-soil ratios on strength are listed in the table below.

[0074] Table 6: Effect of different mix ratios of cement soil on molding strength

[0075]

[0076]

[0077] As can be seen from Table 6, by mixing cement, stone powder and silty sand according to the mix ratio of Example 2, the strength of C20 concrete can basically reach 73.5%, which can basically meet the hardening of temporary sites with low ground strength requirements such as temporary material yards, internal and external frame foundations, and bare soil in construction interval areas at the construction site.

[0078] The construction of cement soil materials should be avoided on rainy days, and all kinds of materials should be mixed evenly first, spread to the area to be hardened, and then add water.

[0079] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing cement soil for temporary construction hardening at a construction site, characterized in that: The earth excavated on site is used as the main material, mixed with a certain proportion of cement and stone powder, and then mixed on site to produce a strong cement-soil material.

2. The preparation method according to claim 1, characterized in that: The mix ratio of the cement-soil material is calculated by weight as follows: cement: silty sand: water: stone powder = 1:2.452:0.5:3.770, wherein the cement variety is PO42.

5.

3. The preparation method according to claim 2, characterized in that: According to the area and thickness of the site to be hardened, the required amount of various materials is calculated according to the mix ratio of the cement soil material; when the volume is large, an excavator is used for mixing, and after the cement, stone powder and silty sand are evenly mixed according to the amount of the mix ratio, the mixed materials are spread to the area planned to be hardened according to the construction plan, and rolled flat; then, according to the amount of water in the mix ratio, water is evenly spread on the cement soil material.

4. The preparation method according to claim 3, characterized in that: When preparing raw materials, it is required that stone powder and silty sand must not contain garbage materials that affect mixing and strength; the moisture content of the soil must be controlled; the cement grade must be prepared according to the stated mix ratio; and tap water must be used for mixing.

5. The preparation method according to claim 4, characterized in that: The cement soil is used for temporary material storage yards at construction sites, internal and external frame foundations, and temporary hardening of bare soil in construction interval areas that have low ground strength requirements.

6. Cement soil prepared according to any one of the preparation methods of claims 1 to 5.

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