Concrete preparation process for enhancing durability of box culvert

Abstract

The invention discloses a concrete preparation process for enhancing the durability of a box culvert, which comprises the following steps: step 1, preparing raw materials: selecting high-grade and low-alkali-content cement, firm, wear-resistant and erosion-resistant aggregate and an admixture for improving the compactness and durability of the concrete, and simultaneously preparing the raw materials for later use; preparing a durability reinforcing agent capable of improving the impermeability, freezing resistance, sulfate erosion resistance and the like of the concrete; step 2, designing a mix proportion, determining an optimal mix proportion through a test according to engineering requirements and a use environment, and specifically mixing cement, aggregate, an admixture and a durability reinforcing agent in a weight ratio of 1: (2.5-3): (0.3-0.4): (0.1-0.2); the concrete prepared by the preparation method disclosed by the invention has excellent durability such as impermeability, freezing resistance and sulfate erosion resistance through specific component composition and a preparation process, and can effectively resist damage of factors such as environment, materials and construction to a concrete structure, so that the safety of a project is improved, and the service life of the project is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of box culverts, and in particular relates to a concrete preparation process for enhancing the durability of box culverts. Background Art

[0002] Box culverts are important structures in civil engineering and are widely used in highway, railway, water conservancy and other projects. However, due to factors such as environment, materials, and construction, the durability of box culverts is often affected, resulting in cracks, leakage and other problems, which seriously affect the safety and normal use of the project. Therefore, improving the durability of box culverts has become an important research topic in the field of civil engineering.

[0003] Based on this, a concrete preparation process is designed to enhance the durability of box culvert. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a concrete preparation process for enhancing the durability of box culverts, which effectively solves the problems raised in the above background.

[0005] To achieve the above object, the present invention provides the following technical solution: a concrete preparation process for enhancing the durability of a box culvert, comprising the following steps:

[0006] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0007] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1: 2.5-3: 0.3-0.4: 0.1-0.2;

[0008] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0009] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0010] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0011] Preferably, in step one, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0012] Preferably, in step 1, the aggregate consists of coarse aggregate and fine aggregate.

[0013] Preferably, the coarse aggregate is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0014] Preferably, in step one, the admixture includes silica fume, fly ash and slag powder.

[0015] Preferably, in step one, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent, and the specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The concrete prepared by the present invention has excellent durability such as impermeability, frost resistance, and sulfate corrosion resistance due to specific component composition and preparation process, and can effectively resist damage to the concrete structure caused by environmental, material, construction and other factors, thereby improving the safety and service life of the project. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] The present invention provides a concrete preparation process for enhancing the durability of a box culvert, comprising the following steps:

[0020] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0021] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1: 2.5-3: 0.3-0.4: 0.1-0.2;

[0022] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0023] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0024] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0025] In step 1 of this embodiment, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0026] In step 1 of this embodiment, the aggregate consists of coarse aggregate and fine aggregate.

[0027] The coarse aggregate in this embodiment is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0028] In step 1 of this embodiment, the admixture includes silica fume, fly ash, and slag powder.

[0029] In step one of this embodiment, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0030] Embodiment 1:

[0031] A concrete preparation process for enhancing the durability of a box culvert comprises the following steps:

[0032] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0033] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1:2.5:0.3:0.1;

[0034] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0035] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0036] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0037] In step 1 of this embodiment, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0038] In step 1 of this embodiment, the aggregate consists of coarse aggregate and fine aggregate.

[0039] The coarse aggregate in this embodiment is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0040] In step 1 of this embodiment, the admixture includes silica fume, fly ash, and slag powder.

[0041] In step one of this embodiment, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0042] Embodiment 2:

[0043] A concrete preparation process for enhancing the durability of a box culvert comprises the following steps:

[0044] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0045] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1:3:0.4:0.2;

[0046] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0047] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0048] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0049] In step 1 of this embodiment, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0050] In step 1 of this embodiment, the aggregate consists of coarse aggregate and fine aggregate.

[0051] The coarse aggregate in this embodiment is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0052] In step 1 of this embodiment, the admixture includes silica fume, fly ash, and slag powder.

[0053] In step one of this embodiment, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0054] Embodiment 3:

[0055] A concrete preparation process for enhancing the durability of a box culvert comprises the following steps:

[0056] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0057] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1:2.8:0.35:0.15;

[0058] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0059] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0060] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0061] In step 1 of this embodiment, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0062] In step 1 of this embodiment, the aggregate consists of coarse aggregate and fine aggregate.

[0063] The coarse aggregate in this embodiment is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0064] In step 1 of this embodiment, the admixture includes silica fume, fly ash, and slag powder.

[0065] In step one of this embodiment, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0066] Embodiment 4:

[0067] A concrete preparation process for enhancing the durability of a box culvert comprises the following steps:

[0068] Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance.

[0069] Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1:2.6:0.33:0.12;

[0070] Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete.

[0071] Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio;

[0072] Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

[0073] In step 1 of this embodiment, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

[0074] In step 1 of this embodiment, the aggregate consists of coarse aggregate and fine aggregate.

[0075] The coarse aggregate in this embodiment is one of pebbles and crushed stones, and the fine aggregate refers to one of natural sand and artificial sand.

[0076] In step 1 of this embodiment, the admixture includes silica fume, fly ash, and slag powder.

[0077] In step one of this embodiment, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.

[0078] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete preparation process for enhancing the durability of box culverts, characterized in that: The following steps are involved: Step 1: Prepare raw materials, select high-grade, low-alkali cement, strong, wear-resistant, and erosion-resistant aggregates, and admixtures that improve the density and durability of concrete. At the same time, prepare durability enhancers that improve the concrete's impermeability, frost resistance, and sulfate erosion resistance. Step 2: Mix ratio design. According to the engineering requirements and use environment, the best mix ratio is determined through experiments. The specific weight ratio is cement: aggregate: admixture: durability enhancer = 1: 2.5-3: 0.3-0.4: 0.1-0.2; Step 3: Mix and stir. Add cement, aggregates and admixtures into the mixer according to the mix ratio and stir them thoroughly to ensure that the raw materials are evenly mixed to ensure the quality of the concrete. Step 4: Adding a durability enhancer, during the stirring process, adding the durability enhancer according to a predetermined ratio; Step 5: Pouring and curing. Pour the mixed concrete into the box culvert mold and vibrate to ensure that the concrete is dense and free of voids. After pouring, use special curing methods such as moisturizing curing and steam curing.

2. A concrete preparation process for enhancing the durability of box culvert according to claim 1, characterized in that: In step 1, the high-grade, low-alkali cement is one of low-alkali silicate cement, low-alkali slag silicate cement, low-alkali pozzolanic silicate cement, and low-alkali fly ash silicate cement.

3. A concrete preparation process for enhancing the durability of box culvert according to claim 1, characterized in that: In step one, the aggregate consists of coarse aggregate and fine aggregate.

4. A concrete preparation process for enhancing the durability of box culvert according to claim 3, characterized in that: Coarse aggregate is one of pebbles and crushed stone, and fine aggregate refers to one of natural sand and artificial sand.

5. The concrete preparation process for enhancing the durability of box culvert according to claim 1, characterized in that: In step one, the admixtures include silica fume, fly ash and slag powder.

6. The concrete preparation process for enhancing the durability of box culvert according to claim 1, characterized in that: In step one, the durability enhancer includes a waterproofing agent, an antifreeze agent, and an anti-sulfate corrosion agent. The specific addition amount is 2% of the mass of the cement for the waterproofing agent, 3% of the mass of the cement for the antifreeze agent, and 1% of the mass of the cement for the anti-sulfate corrosion agent.