Method for preparing tubular pile concrete by using industrial and mining solid wastes

Abstract

The invention relates to a method for preparing tubular pile concrete by using industrial and mining solid wastes, and belongs to the technical field of concrete tubular piles, the tubular pile concrete specifically comprises the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand and a water reducing agent, and the mixing ratio of the cement to the water to the mineral powder to the fly ash to the coal gangue to the washed sand to the water reducing agent is 365-503: 154: 42-59: 21-30: 903-996: 738-814: 8.13-12.43; cement, coal gangue and washed sand are mixed in proportion, then water, a water reducing agent, fly ash and mineral powder are added and stirred evenly to form the tubular pile concrete, the process is simple, the industrial and mining solid waste is adopted to replace gravel, and the production cost can be greatly reduced.

Description

Technical Field

[0001] The invention relates to a method for preparing pipe pile concrete by utilizing industrial and mining solid waste, and belongs to the technical field of concrete pipe piles. Background Art

[0002] Currently, existing municipal water conservancy concrete components, such as paving bricks, road slabs, and canals, typically require a concrete strength of C30. Crushed stone, as a coarse aggregate in concrete, accounts for 40%-50% of the total. Therefore, choosing pipe piles with appropriate strength and low cost is more suitable to meet market demand. Coal gangue, as an industrial waste, has potential for utilization and is significantly lower in cost than other aggregates such as crushed stone. However, the mix design for its application in these components is not yet mature. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides a method for preparing pipe pile concrete using industrial and mining solid waste. The process is simple and industrial and mining solid waste is used instead of crushed stone, which can greatly reduce production costs.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is a method for preparing pipe pile concrete using industrial and mining solid waste, comprising the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand and water reducer, wherein the mixing ratio of the cement, water, mineral powder, fly ash, coal gangue, washed sand and water reducer is 365-503:154:42-59:21-30:903-996:738-814:8.13-12.43; Mix cement, coal gangue and washed sand in proportion, then add water, water reducing agent, fly ash and mineral powder and stir evenly to form pipe pile concrete.

[0005] Preferably, the preparation method of the coal gangue is: selecting coal gangue with a particle size range of 1-25 mm, washing and drying it, and crushing it, and the crushing value is not greater than 20%.

[0006] Preferably, the washed sand is medium-coarse sand with a fineness modulus between 2.3 and 3.0.

[0007] Preferably, the activity index of the mineral powder is 78% after 7 days and 98% after 28 days.

[0008] Preferably, the fly ash has a fineness of 27% and a loss on ignition of 2.9%.

[0009] Preferably, the water reducer is a polycarboxylic acid water reducer with a water reduction rate of 30%.

[0010] Compared with existing technologies, this invention has the following technical benefits: Through a scientifically designed mix ratio, it fully utilizes coal gangue, a mining waste, to effectively replace crushed stone. As an inexpensive alternative material, its widespread use not only reduces concrete production costs but also enables resource recycling, meeting the requirements of energy conservation, emission reduction, and green development. DETAILED DESCRIPTION

[0011] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0012] A method for preparing pipe pile concrete using industrial and mining solid waste comprises the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand, and a water reducer, wherein the mixing ratio of the cement, water, mineral powder, fly ash, coal gangue, washed sand, and water reducer is 365:154:42:21:996:738:8.13; the cement, coal gangue, and washed sand are mixed according to a certain proportion, and then water, a water reducer, fly ash, and mineral powder are added and stirred uniformly to form the pipe pile concrete.

[0013] The coal gangue used is selected from a particle size range of 1-25mm, cleaned, dried, and crushed to a maximum crushing value of 20%. The washed sand is medium-coarse sand with a fineness modulus between 2.3 and 3.0. The activity index of the mineral powder is 78% after 7 days and 98% after 28 days. The fly ash has a fineness of 27% and a loss on ignition of 2.9%. A polycarboxylate superplasticizer is used as the water reducer, with a water reduction rate of 30%. Example 2

[0014] A method for preparing pipe pile concrete using industrial and mining solid waste comprises the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand, and a water reducer, wherein the mixing ratio of the cement, water, mineral powder, fly ash, coal gangue, washed sand, and water reducer is 422:154:50:25:957:783:9.94; the cement, coal gangue, and washed sand are mixed according to a certain proportion, and then water, a water reducer, fly ash, and mineral powder are added and stirred uniformly to form the pipe pile concrete.

[0015] The coal gangue used is selected from a particle size range of 1-25mm, cleaned, dried, and crushed to a maximum crushing value of 20%. The washed sand is medium-coarse sand with a fineness modulus between 2.3 and 3.0. The activity index of the mineral powder is 78% after 7 days and 98% after 28 days. The fly ash has a fineness of 27% and a loss on ignition of 2.9%. A polycarboxylate superplasticizer is used as the water reducer, with a water reduction rate of 30%. Example 3

[0016] A method for preparing pipe pile concrete using industrial and mining solid waste comprises the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand, and a water reducer, wherein the mixing ratio of the cement, water, mineral powder, fly ash, coal gangue, washed sand, and water reducer is 503:154:59:30:903:738:12.43. The cement, coal gangue, and washed sand are mixed according to a certain proportion, and then water, a water reducer, fly ash, and mineral powder are added and stirred uniformly to form the pipe pile concrete.

[0017] The coal gangue used is selected from a particle size range of 1-25mm, cleaned, dried, and crushed to a maximum crushing value of 20%. The washed sand is medium-coarse sand with a fineness modulus between 2.3 and 3.0. The activity index of the mineral powder is 78% after 7 days and 98% after 28 days. The fly ash has a fineness of 27% and a loss on ignition of 2.9%. A polycarboxylate superplasticizer is used as the water reducer, with a water reduction rate of 30%.

[0018] The test blocks were subjected to compression tests for the above three embodiments, and the test results are as follows:

[0019] Experiments have shown that after adopting the above mix ratio, the concrete strength can eventually reach more than 30Mpa, which fully meets the production requirements.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A method for preparing pipe pile concrete using industrial and mining solid waste, characterized in that : comprising the following components: cement, water, mineral powder, fly ash, coal gangue, washed sand and water reducing agent, wherein the mixing ratio of the cement, water, mineral powder, fly ash, coal gangue, washed sand and water reducing agent is 365-503:154:42-59:21-30:903-996:738-814:8.13-12.43; Mix cement, coal gangue and washed sand in proportion, then add water, water reducing agent, fly ash and mineral powder and stir evenly to form pipe pile concrete.

2. The method for preparing pipe pile concrete using industrial and mining solid waste according to claim 1, characterized in that: The preparation method of the coal gangue is as follows: coal gangue with a particle size range of 1-25 mm is selected, and after cleaning and drying, the coal gangue is crushed, and the crushing value is not greater than 20%.

3. The method for preparing pipe pile concrete using industrial and mining solid waste according to claim 1, characterized in that: The washed sand is medium-coarse sand with a fineness modulus between 2.3 and 3.

0.

4. The method for preparing pipe pile concrete using industrial and mining solid waste according to claim 1, characterized in that: The activity index of the mineral powder is 78% after 7 days and 98% after 28 days.

5. The method for preparing pipe pile concrete using industrial and mining solid waste according to claim 1, characterized in that: The fly ash has a fineness of 27% and a loss on ignition of 2.9%.

6. The method for preparing pipe pile concrete using industrial and mining solid waste according to claim 1, characterized in that: The water reducing agent is a polycarboxylic acid water reducing agent with a water reducing rate of 30%.

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