Compound high polymer soil stabilizer

Abstract

The invention discloses a compound high polymer soil stabilizer, and relates to the technical field of soil stabilizers. The concrete comprises the following raw materials: Portland cement, polyacrylamide, calcium chloride, calcium sulfate, sodium carbonate, calcium lignosulphonate, sodium lignosulphonate, a formaldehyde condensate of sulfonated acetone, polyvinyl butyral, 3-aminopropyltrialkoxysilane, modified water glass, polyvinylpyrrolidone, water and an expanding agent. According to the compound high polymer soil stabilizer, the water glass is modified, the aging speed of the water glass is delayed, the soil stabilizer can be stored for a long time, the modified water glass is longer in bonding time compared with common water glass, and the curing effect of the soil stabilizer is further improved; therefore, the compressive strength of the solidified soil is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil stabilizers, and particularly to a compound polymer soil stabilizer. Background Art

[0002] In engineering construction, due to limited natural resources, the existing sand and gravel materials can no longer meet the growing needs of engineering construction. At the same time, the exploitation of sand and gravel will also cause serious damage to the natural environment, resulting in a decline in the quality of the social living environment. In engineering construction, if the inexpensive and widely available soil can be fully and effectively utilized as an engineering material, it is possible to save the consumption of sand and gravel, reduce the engineering cost, while reducing the damage to natural resources, protecting the ecological environment, and improving the quality of social survival while ensuring engineering construction. A soil stabilizer is an engineering material that can quickly and significantly change the physical and chemical properties of soil and make the soil have engineering characteristics. The soil stabilized by the soil stabilizer uses the locally available soil as the main building material, and can use waste soil, muck, construction waste, etc. as the main aggregate, and add a certain amount of soil stabilizer to change the physical and chemical properties of the waste soil, muck, and construction waste, so that it can be reused as a building material. Its mining and processing are relatively easy, without long-distance transportation, saving transportation costs, and moreover, saving resources and protecting the environment. Therefore, the technology of using soil stabilizer to reinforce soil is of great significance both technically and economically.

[0003] However, the existing soil stabilizers have limitations such as poor compressive strength of curing and long curing time. For this reason, we have proposed a compound polymer soil stabilizer. Summary of the Invention

[0004] The present invention provides a compound polymer soil stabilizer, which solves the problems raised in the above background art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A compound polymer soil stabilizer, comprising the following raw materials: portland cement, polyacrylamide, calcium chloride, calcium sulfate, sodium carbonate, calcium lignosulfonate, sodium lignosulfonate, sulfonated acetone formaldehyde condensate, polyvinyl butyral, 3-aminopropyltrialkoxysilane, modified sodium silicate, polyvinylpyrrolidone, water and an expanding agent;

[0006] The contents of the above raw materials are as follows: 8-12 parts of portland cement, 5-8 parts of polyacrylamide, 10-15 parts of calcium chloride, 10-15 parts of calcium sulfate, 20-25 parts of sodium carbonate, 10-15 parts of calcium lignosulfonate, 8-12 parts of sodium lignosulfonate, 2-5 parts of sulfonated acetone formaldehyde condensate, 2-3.5 parts of polyvinyl butyral, 3-4 parts of 3-aminopropyltrialkoxysilane, 3-4 parts of modified sodium silicate, 2.5-3 parts of polyvinylpyrrolidone, 40-60 parts of water, and 5-10 parts of expansion agent;

[0007] The specific preparation method of the above compound high-polymer soil stabilizer includes the following steps:

[0008] Weigh each component;

[0009] Fully mix portland cement, calcium chloride, calcium sulfate, sodium carbonate and polyvinyl butyral evenly to form a solid base;

[0010] Fully mix polyacrylamide, calcium lignosulfonate, calcium lignosulfonate and polyvinylpyrrolidone evenly, add them to water to form an aqueous solution, and sequentially add sodium silicate, sulfonated acetone formaldehyde condensate and 3-aminopropyltrialkoxysilane to the aqueous solution, and mix them evenly to form a liquid base;

[0011] Add the solid base to the liquid base, stir and mix evenly, and then add the expansion agent and mix evenly to form a compound high-polymer soil stabilizer.

[0012] Preferably, the modified sodium silicate is sodium silicate heated at 40-45 °C.

[0013] Preferably, the modified sodium silicate is a mixture of potassium metasilicate and sodium silicate.

[0014] Preferably, the potassium metasilicate accounts for 25-30% of the weight of the modified sodium silicate.

[0015] Preferably, the quality of the portland cement accounts for 70% of the total quality, and the portland cement is PO42.5 ordinary portland cement or PII52.5 portland cement.

[0016] Preferably, the calcium chloride, calcium sulfate, sodium carbonate and portland cement are all granular with the same particle size, and the specific surface areas of the calcium chloride, calcium sulfate, sodium carbonate and portland cement are all 300-400m 2 / kg.

[0017] Preferably, the expansion agent is one or more of calcium aluminate sulfate, gypsum, sodium dodecyl sulfate, and ammonium lauryl sulfate, and the gypsum is desulfurized gypsum.

[0018] The present invention has the following beneficial effects:

[0019] 1. The compound high-polymer soil solidifying agent modifies sodium silicate to delay its aging rate, enabling the soil solidifying agent to be stored for a longer time. Moreover, compared with ordinary sodium silicate, the modified sodium silicate has a longer bonding time, further enhancing the solidifying effect of the soil solidifying agent, thereby significantly increasing the compressive strength of the solidified soil.

[0020] 2. The compound high-polymer soil solidifying agent forms a wrapped bonding structure, resulting in better bonding effect, providing sufficient strength for corresponding road surfaces or buildings, reducing the burden on the road surface, improving the usage condition of the road surface, being less affected by natural environments such as frost and humidity, being able to extend the service life of roads or buildings, and saving maintenance costs. Detailed implementation manners

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention provides a compound high-polymer soil solidifying agent, which includes the following raw materials: portland cement, polyacrylamide, calcium chloride, calcium sulfate, sodium carbonate, calcium lignosulfonate, sodium lignosulfonate, formaldehyde condensate of sulfonated acetone, polyvinyl butyral, 3-aminopropyltrialkoxysilane, modified sodium silicate, polyvinylpyrrolidone, water and an expanding agent;

[0023] The contents of the above raw materials are as follows: 8 - 12 parts of portland cement, 5 - 8 parts of polyacrylamide, 10 - 15 parts of calcium chloride, 10 - 15 parts of calcium sulfate, 20 - 25 parts of sodium carbonate, 10 - 15 parts of calcium lignosulfonate, 8 - 12 parts of sodium lignosulfonate, 2 - 5 parts of formaldehyde condensate of sulfonated acetone, 2 - 3.5 parts of polyvinyl butyral, 3 - 4 parts of 3-aminopropyltrialkoxysilane, 3 - 4 parts of modified sodium silicate, 2.5 - 3 parts of polyvinylpyrrolidone, 40 - 60 parts of water, and 5 - 10 parts of an expanding agent;

[0024] Among them: The modified sodium silicate can be sodium silicate heated at 40 - 45 °C or a mixture of potassium metasilicate and sodium silicate. And when the modified sodium silicate is a mixture of potassium metasilicate and sodium silicate, potassium metasilicate accounts for 25 - 30% of the weight of the modified sodium silicate. Through the setting of the modified sodium silicate, when the solidifying agent is used, through the polycondensation reaction of silicic acid in the sodium silicate solution, relatively large-sized polysilicic acid colloid particles can be generated to achieve the effect of reducing the bonding strength of sodium silicate. And by heating to modify sodium silicate, the duration of its bonding can be extended, further increasing the compressive strength of soil solidification.

[0025] The mass of portland cement accounts for 70% of the total mass. The portland cement is PO42.5 ordinary portland cement or PII52.5 portland cement. Calcium chloride, calcium sulfate, sodium carbonate and portland cement are all granular with the same particle size. The specific surface areas of calcium chloride, calcium sulfate, sodium carbonate and portland cement are all 300 - 400 m 2 / kg, which is convenient for the mixing of solid raw materials and liquid raw materials.

[0026] The expansive agent is one or several of calcium aluminate sulfate, gypsum, sodium dodecyl sulfate, ammonium lauryl sulfate, and the gypsum is desulfurized gypsum. Through the setting of the expansive agent, when the soil stabilizer is used, the expansive agent can stimulate the activity of the stabilizer, fill the soil gaps, increase the volume stability of the solidified soil, reduce the porosity of the solidified soil, and improve the compressive performance of the solidified soil.

[0027] The specific preparation method of the above compound polymer soil stabilizer includes the following steps:

[0028] Weigh each component;

[0029] Fully mix portland cement, calcium chloride, calcium sulfate, sodium carbonate and polyvinyl butyral evenly to form a solid base;

[0030] Fully mix polyacrylamide, calcium lignosulfonate, calcium lignosulfonate and polyvinylpyrrolidone evenly, add them into water to form an aqueous solution, and then successively add sodium silicate, formaldehyde condensate of sulfonated acetone and 3-aminopropyltrialkoxysilane into the aqueous solution, and fully mix them evenly to form a liquid base;

[0031] Add the solid base into the liquid base, stir and mix evenly, and then add the expansive agent and mix evenly to form a compound polymer soil stabilizer.

[0032] When the prepared compound polymer soil stabilizer is used, its mass is 17% - 21% of the mass of the soil. The soil stabilizer is directly and evenly sprayed on the soil, and then the stabilizer and the soil to be solidified are evenly mixed by construction machinery or manually, and then compacted. The compound polymer soil stabilizer forms a wrapped structure on the surface of soil particles through the organic components, and further consolidates the overall strength and water stability of the soil under the cooperation of the inorganic components. Its polyvinyl butyral molecule has good cold resistance and impact resistance, and is easy to adhere to various different surfaces, showing good bonding force, and cooperates with calcium lignosulfonate, 3-aminopropyltrialkoxysilane, and polyvinylpyrrolidone molecules to enable it to form a good and stable structure with bonding force.

[0033] In summary, the compound polymer soil stabilizer forms a wrapped bonding structure, which results in a good forming effect and better bonding effect. It further improves the compressive strength of soil solidification. By modifying sodium silicate, the bonding time of sodium silicate is extended, so that its bonding time is long, thereby prolonging the service life of roads or buildings and saving maintenance costs.

[0034] In the description of the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite polymer soil solidifier, characterized in that: The raw materials include: silicate cement, polyacrylamide, calcium chloride, calcium sulfate, sodium carbonate, calcium lignin sulfonate, sodium lignin sulfonate, formaldehyde condensate of sulfonated acetone, polyvinyl butyral, 3-aminopropyltrialkoxysilane, modified water glass, polyvinyl pyrrolidone, water and expansion agent; The contents of the above raw materials are as follows: 8-12 parts of silicate cement, 5-8 parts of polyacrylamide, 10-15 parts of calcium chloride, 10-15 parts of calcium sulfate, 20-25 parts of sodium carbonate, 10-15 parts of calcium lignin sulfonate, 8-12 parts of sodium lignin sulfonate, 2-5 parts of formaldehyde condensate of sulfonated acetone, 2-3.5 parts of polyvinyl butyral, 3-4 parts of 3-aminopropyl trialkoxy silane, 3-4 parts of modified water glass, 2.5-3 parts of polyvinyl pyrrolidone, 40-60 parts of water, and 5-10 parts of expansion agent; The specific preparation method of the composite polymer soil solidifying agent comprises the following steps: Weigh each component; Mix silicate cement, calcium chloride, calcium sulfate, sodium carbonate and polyvinyl butyral thoroughly and evenly to form a solid base; The polyacrylamide, calcium lignin sulfonate, calcium lignin sulfonate and polyvinyl pyrrolidone are fully mixed and added into water to prepare an aqueous solution, water glass, formaldehyde condensate of sulfonated acetone and 3-aminopropyltrialkoxysilane are added into the aqueous solution in sequence, and the mixture is fully mixed to prepare a liquid base; Add the solid base into the liquid base, stir and mix evenly, then add the expansion agent and mix evenly to form a composite polymer soil solidifier.

2. A composite polymer soil solidifying agent according to claim 1, characterized in that: The modified water glass is water glass heated at 40-45°C.

3. The composite polymer soil solidifying agent according to claim 1, characterized in that: The modified water glass is a mixture of potassium metasilicate and water glass.

4. A composite polymer soil solidifying agent according to claim 3, characterized in that: The potassium metasilicate accounts for 25-30% of the weight of the modified water glass.

5. The composite polymer soil solidifying agent according to claim 1, characterized in that: The mass of the silicate cement accounts for 70% of the total mass, and the silicate cement is PO42.5 ordinary silicate cement or PII52.5 silicate cement.

6. The composite polymer soil solidifying agent according to claim 1, characterized in that: The calcium chloride, calcium sulfate, sodium carbonate and silicate cement are all in the form of particles with the same particle size, and the specific surface areas of the calcium chloride, calcium sulfate, sodium carbonate and silicate cement are all 300-400m 2 / kg.

7. The composite polymer soil solidifying agent according to claim 1, characterized in that: The expansion agent is one or more of calcium aluminum sulfate, gypsum, sodium lauryl sulfate, and fatty alcohol ammonium sulfate, and the gypsum is desulfurized gypsum.