Construction technology of super large anti-seepage concrete pool

Abstract

The present application relates to the field of sewage treatment, and specifically discloses a construction process for an ultra-large impermeable concrete pool, comprising the following steps: S1, construction measurement and layout; S2, paving and drainage; S3, foundation pit excavation; S4, concrete engineering; S5, installation of reinforced concrete drainage pipes; S6, backfilling; S4 concrete engineering is the use of impermeable concrete to cast the main body of the pool; the impermeable concrete is composed of the following raw materials in parts by weight: 960-1080 parts of coarse aggregate, 730-810 parts of fine aggregate, 320-440 parts of cementitious material, 39-51 parts of admixture, 150-200 parts of water, and 50-70 parts of curing material, wherein the curing material includes a densifier and an absorbing binder, and the weight ratio of the densifier and the absorbing binder is (2-3):(3-4). The construction process of the present application has the advantages of reducing chloride ion penetration and extending the life of the pool.

Description

Technical Field

[0001] The present application relates to the field of sewage treatment, and more specifically, to a construction process for an ultra-large impermeable concrete pool. Background Art

[0002] With the continuous increase in sewage generation and the continued deterioration of environmental problems, sewage treatment plants are shouldering an increasingly important responsibility, and ensuring the normal and stable operation of sewage treatment plants is becoming increasingly important. Facts have proven that the construction quality of sewage treatment plant supporting equipment and facilities has a crucial impact on the operation status of sewage treatment plants.

[0003] In the construction of large-scale sewage treatment plants, the pool structure is mostly made of reinforced concrete structure. The concrete structure is prone to durability failure due to the penetration of chloride ions. The concrete peels off and causes deep corrosion, which in turn creates cracks and causes leakage in the pool. Summary of the Invention

[0004] In order to reduce the adverse effects of chloride ion penetration on cement concrete structures, reduce crack formation, and extend the service life of the pool, the present application provides a construction process for an ultra-large impermeable concrete pool.

[0005] A construction process for an ultra-large impermeable concrete pool includes the following steps: S1, construction surveying and setting out; S2, paving and drainage; S3, foundation pit excavation; S4, concrete engineering; S5, installation of reinforced concrete drainage pipes; S6, backfilling;

[0006] S4 concrete engineering is to use anti-seepage concrete to pour the main body of the pool;

[0007] The anti-seepage concrete is composed of the following raw materials in parts by weight: 960-1080 parts of coarse aggregate, 730-810 parts of fine aggregate, 320-440 parts of cementitious material, 39-51 parts of admixture, 150-200 parts of water, and 50-70 parts of curing material. The curing material includes a densifier and an absorbing binder, and the weight ratio of the densifier to the absorbing binder is (2-3):(3-4).

[0008] By adopting the above technical solution, when the concrete is used for pouring a pool, the densifier effectively improves the density of the concrete, making it more difficult for chloride ions to penetrate into the concrete, thereby improving the concrete's resistance to chloride ions. When chloride ions penetrate into the concrete, the absorption binder combines with the chloride ions, thereby further reducing the chloride ions entering the concrete, effectively reducing the adverse effects of chloride ions on the concrete, reducing the formation of cracks, and extending the service life of the pool.

[0009] Preferably, the cementitious material includes cement and admixture, and the weight ratio of the cement to the admixture is (11-15):(5-7).

[0010] By adopting the above technical solution, cement and admixtures are used as cementitious materials, thereby reducing the amount of cement used and effectively reducing concrete cracking caused by hydration heat.

[0011] Preferably, the admixture includes mineral powder and fly ash, and the weight ratio of the mineral powder to the fly ash is 1:1.

[0012] By adopting the above technical solution, the addition of mineral powder and fly ash can reduce the amount of cement used and at the same time improve the strength of concrete.

[0013] Preferably, the admixture includes a pumping agent, an expansion agent and an air entraining agent, and the weight ratio of the pumping agent, the expansion agent and the air entraining agent is (2-3):(10-13):1.

[0014] By adopting the above technical solution, the pumping agent effectively improves the pumping performance of concrete, the air entraining agent allows the bubbles in the concrete to be discharged, thereby reducing the occurrence of cracks, and the expansive agent can compensate for the shrinkage of the concrete, thereby further reducing the occurrence of cracks.

[0015] Preferably, the densifier includes a filling resin, an inducer and a nucleating agent, and the weight ratio of the filling resin, the inducer and the nucleating agent is 7:1:2.

[0016] By adopting the above technical solution, the inducing agent and the nucleating agent are used to promote the crystallization and solidification of the filling resin, thereby improving the density of the concrete and effectively improving the concrete's resistance to chloride ion penetration.

[0017] Preferably, the inducer is dihydroxybenzoic acid, and the nucleating agent is Li4SiO4.

[0018] By adopting the above technical solution, dihydroxybenzoic acid is combined with lithium orthosilicate to promote the crystallization of the filling resin, thereby effectively improving the density of the concrete.

[0019] Preferably, the absorption binder includes an absorbent, a binder and a linker, and the weight ratio of the absorbent, the binder and the linker is 3:1:1.

[0020] By adopting the above technical solution, the absorbent is used as a carrier, and the binder is fixed to the absorbent through a connecting agent. When chloride ions penetrate into the concrete, the chloride ions are combined with the binder through the absorbent, thereby further limiting the penetration of chloride ions and reducing the corrosion damage of chloride ions to the concrete.

[0021] Preferably, the absorbent is boron nitride particles, the binder is aluminum chloride, and the linker is carboxymethyl guar gum.

[0022] By adopting the above technical solution, aluminum chloride is combined with boron nitride particles via carboxymethyl guar gum. The porous structure of the boron nitride particles themselves facilitates the entry of the carboxymethyl guar gum and aluminum chloride mixture. When chloride ions penetrate into the concrete, the chloride ions combine with the carboxymethyl guar gum and aluminum chloride mixture along the porous structure of the boron nitride particles, thereby absorbing and fixing the chloride ions and reducing further penetration of the chloride ions.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. Since this application uses a densifier to improve the density of concrete, it makes it more difficult for chloride ions to penetrate into the concrete. When the chloride ions further penetrate into the concrete, the chloride ions are absorbed by the absorption binder and solidified, further reducing the chloride ions penetrating into the concrete and extending the life of the concrete.

[0025] 2. In the present application, dihydroxybenzoic acid is combined with lithium orthosilicate to promote the crystallization of the filling resin and effectively improve the density of the concrete.

[0026] 3. In the present application, aluminum chloride is combined with boron nitride particles via carboxymethyl guar gum. The porous structure of the boron nitride particles facilitates the entry of the carboxymethyl guar gum and aluminum chloride mixture. When chloride ions penetrate into the concrete, the chloride ions combine with the carboxymethyl guar gum and aluminum chloride mixture along the porous structure of the boron nitride particles, thereby absorbing and fixing the chloride ions. DETAILED DESCRIPTION

[0027] In this application, the coarse aggregate is commercially available crushed stone with a particle size of 5-25 mm; the fine aggregate is commercially available medium sand; the water is drinking water; the pumping agent is FMY-1, commercially available; the expansion agent is SY-G, commercially available; the air-entraining agent is AE-1, commercially available; the fly ash is commercially available secondary fly ash; the mineral powder is commercially available S95 grade mineral powder; and the cement is commercially available P.O.42.5. The filling resin is commercially available water-based acrylic resin emulsion; the inducer is commercially available dihydroxybenzoic acid; the nucleating agent is commercially available Li4SiO4 powder with a particle size of 500 mesh; the absorbent is commercially available boron nitride particles with a particle size of 2 mm; the binder is commercially available aluminum chloride with a particle size of 200 mesh; and the linker is commercially available carboxymethyl guar gum.

[0028] The present application is further described in detail below with reference to the embodiments.

[0029] Preparation Example

[0030] Preparation Example 1

[0031] This preparation example discloses an absorbent binder, which is prepared by the following steps:

[0032] 10 kg of carboxymethyl guar gum was prepared into a 30% by weight carboxymethyl guar gum aqueous solution, 10 kg of aluminum chloride and 30 kg of boron nitride particles were stirred and mixed evenly, dried at 80° C., and crushed to a particle size of 1 mm, thereby preparing an absorption binder.

[0033] Preparation Example 2

[0034] This preparation example discloses an absorbent binder, which is prepared by the following steps:

[0035] 10 kg of carboxymethyl guar gum was prepared into a 30% by weight carboxymethyl guar gum aqueous solution and 10 kg of aluminum chloride, stirred and mixed evenly, dried at 80° C., and crushed to a particle size of 1 mm, thereby preparing an absorption binder.

[0036] Preparation Example 3

[0037] This preparation example discloses an absorbent binder, which is prepared by the following steps:

[0038] 10 kg of carboxymethyl guar gum was prepared into a 30% by weight carboxymethyl guar gum aqueous solution and 10 kg of boron nitride particles were stirred and mixed evenly, dried at 80° C., and crushed to a particle size of 1 mm, thereby preparing an absorption binder.

[0039] Preparation Example 4

[0040] This preparation example discloses an absorbent binder, which is prepared by the following steps:

[0041] 10 kg of aluminum chloride and 10 kg of boron nitride particles were stirred and mixed evenly, dried at 80° C., and crushed to a particle size of 1 mm, thereby preparing an absorption binder.

[0042] Example

[0043] Example 1

[0044] This embodiment discloses a construction process for an ultra-large impermeable concrete pool, which includes the following steps:

[0045] S1. Construction measurement and layout;

[0046] S2, paving drainage;

[0047] S3, excavation of foundation pit;

[0048] S4. Concrete engineering: Use impermeable concrete to pour the main body of the pool;

[0049] S5. Install reinforced concrete drainage pipes;

[0050] S6. Backfilling of earthwork.

[0051] Example 2

[0052] This embodiment discloses an impermeable concrete, which is prepared by the following steps:

[0053] 960 kg of coarse aggregate, 730 kg of fine aggregate, 220 kg of cement, 50 kg of mineral powder, and 50 kg of fly ash were stirred and mixed evenly, and then 150 kg of water, 6 kg of pumping agent, 30 kg of expansion agent, 3 kg of air entraining agent and 30 kg of the absorption binder prepared in Preparation Example 1 were added. At the same time, 14 kg of aqueous acrylic resin emulsion, 2 kg of dihydroxybenzoic acid and 4 kg of Li4SiO4 powder were stirred and mixed evenly and added thereto as a densifying agent. Finally, all the raw materials were stirred and mixed evenly to prepare anti-seepage concrete.

[0054] Example 3

[0055] This embodiment discloses an impermeable concrete, which is prepared by the following steps:

[0056] 1020kg of coarse aggregate, 770kg of fine aggregate, 260kg of cement, 63kg of mineral powder, and 63kg of fly ash were stirred and mixed evenly, and then 175kg of water, 8.4kg of pumping agent, 34kg of expansion agent, 3kg of air entraining agent and 35kg of the absorption binder prepared in Preparation Example 1 were added. At the same time, 17.5kg of aqueous acrylic resin emulsion, 2.5kg of dihydroxybenzoic acid and 5kg of Li4SiO4 powder were stirred and mixed evenly and added thereto as a compacting agent. Finally, all the raw materials were stirred and mixed evenly to prepare anti-seepage concrete.

[0057] Example 4

[0058] This embodiment discloses an impermeable concrete, which is prepared by the following steps:

[0059] 1080kg of coarse aggregate, 810kg of fine aggregate, 300kg of cement, 70kg of mineral powder, and 70kg of fly ash were stirred and mixed evenly, and then 200kg of water, 9kg of pumping agent, 39kg of expansion agent, 3kg of air entraining agent and 40kg of the absorption binder prepared in Preparation Example 1 were added. At the same time, 21kg of aqueous acrylic resin emulsion, 3kg of dihydroxybenzoic acid and 6kg of Li4SiO4 powder were stirred and mixed evenly and added thereto as a compacting agent. Finally, all the raw materials were stirred and mixed evenly to prepare anti-seepage concrete.

[0060] Example 5

[0061] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that the absorption binder is prepared in Preparation Example 2.

[0062] Example 6

[0063] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that the absorption binder is prepared in Preparation Example 3.

[0064] Example 7

[0065] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that the absorption binder is prepared in Preparation Example 4.

[0066] Example 8

[0067] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that 35 kg of carboxymethyl guar gum is used instead of the absorbing binder.

[0068] Example 9

[0069] This embodiment discloses an impermeable concrete, which differs from the embodiment 3 in that 35 kg of boron nitride particles are used instead of the absorbing binder.

[0070] Example 10

[0071] This embodiment discloses an anti-permeability concrete, which is different from the embodiment 3 in that 35 kg of aluminum chloride is used instead of the absorbing binder.

[0072] Example 11

[0073] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that no Li4SiO4 powder is added.

[0074] Example 12

[0075] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that no dihydroxybenzoic acid is added.

[0076] Example 13

[0077] This embodiment discloses an anti-seepage concrete, which is different from Example 3 in that no water-based acrylic resin emulsion is added.

[0078] Example 14

[0079] This embodiment discloses an anti-permeability concrete, which is different from Example 3 in that dihydroxybenzoic acid and Li4SiO4 powder are not added.

[0080] Example 15

[0081] This embodiment discloses an anti-permeability concrete, which differs from the embodiment 3 in that:

[0082] No water-based acrylic resin emulsion and Li4SiO4 powder were added.

[0083] Example 16

[0084] This embodiment discloses an anti-permeability concrete, which differs from the embodiment 3 in that:

[0085] No water-based acrylic resin emulsion and dihydroxybenzoic acid added.

[0086] Comparative Example

[0087] Comparative Example 1

[0088] This comparative example discloses an impermeable concrete, which differs from Example 3 in that:

[0089] No densifier added.

[0090] Comparative Example 2

[0091] This comparative example discloses an impermeable concrete, which differs from Example 3 in that:

[0092] No absorbent binders added.

[0093] Comparative Example 3

[0094] This comparative example discloses an impermeable concrete, which differs from Example 3 in that:

[0095] No densifying agents or absorbent binders added.

[0096] Performance testing

[0097] With reference to GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete", the compressive strength test of anti-seepage concrete was carried out.

[0098] With reference to GB / T50082-2009 "Standard for Test Methods for Long-term Performance and Durability of Ordinary Concrete", a chloride ion penetration resistance test was conducted on the anti-seepage concrete.

[0099] Table 1 Concrete performance test results

[0100]

[0101]

[0102] Combining Example 3 and Comparative Examples 1-3 with Table 1, it can be seen that the use of a densifier improves the density of the concrete, making it more difficult for chloride ions to penetrate into the concrete. When the chloride ions further penetrate into the concrete, the chloride ions are absorbed by the absorption binder and solidified, further reducing the chloride ions that penetrate into the concrete and extending the life of the concrete.

[0103] From Example 3, Examples 5-10, and Comparative Example 2, and from Table 1, it can be seen that when aluminum chloride is combined with boron nitride particles via carboxymethyl guar gum, the porous structure of the boron nitride particles facilitates the entry of the carboxymethyl guar gum and aluminum chloride mixture. When chloride ions penetrate into the concrete, the chloride ions are combined with the carboxymethyl guar gum and aluminum chloride mixture along the porous structure of the boron nitride particles, thereby absorbing and fixing the chloride ions and reducing further penetration of the chloride ions.

[0104] From Example 3, Examples 11-16, and Comparative Example 1 and Table 1, it can be seen that dihydroxybenzoic acid combines with lithium orthosilicate to promote the crystallization of the filling resin, effectively improve the density of the concrete, and effectively improve the concrete's resistance to chloride ion penetration.

[0105] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A construction process for an ultra-large impermeable concrete pool, characterized in that: The following steps are involved: S1. Construction surveying and setting out; S2. Paving and drainage; S3. Excavation of foundation pit; S4. Concrete engineering; S5. Installation of reinforced concrete drainage pipes; S6. Backfilling; S4 concrete engineering is to use anti-seepage concrete to pour the main body of the pool; The anti-seepage concrete is composed of the following raw materials in parts by weight: 960-1080 parts of coarse aggregate, 730-810 parts of fine aggregate, 320-440 parts of cementitious material, 39-51 parts of admixture, 150-200 parts of water, and 50-70 parts of curing material, wherein the curing material includes a densifier and an absorbing binder, and the weight ratio of the densifier to the absorbing binder is (2-3):(3-4); The densifier includes a filling resin, an inducer and a nucleating agent, wherein the weight ratio of the filling resin, the inducer and the nucleating agent is 7:1:2; the inducer is dihydroxybenzoic acid, and the nucleating agent is Li4SiO4; The absorption binder includes an absorbent, a binder and a connector, and the weight ratio of the absorbent, the binder and the connector is 3:1:1; the absorbent is boron nitride particles, the binder is aluminum chloride, and the connector is carboxymethyl guar gum.

2. The construction process of the super-large impermeable concrete pool according to claim 1 is characterized in that: The cementitious material comprises cement and admixture, and the weight ratio of the cement to the admixture is (11-15):(5-7).

3. The construction process of the super-large impermeable concrete pool according to claim 2 is characterized in that: The admixture includes mineral powder and fly ash, and the weight ratio of the mineral powder to the fly ash is 1:

1.

4. The construction process of the super-large impermeable concrete pool according to claim 1 is characterized in that: The admixture comprises a pumping agent, an expansion agent and an air entraining agent, and the weight ratio of the pumping agent, the expansion agent and the air entraining agent is (2-3):(10-13):1.

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