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Early-strength cement-based grouting material as well as preparation method and application thereof

An early-strength cement, cement-based technology, applied in infrastructure engineering, construction, etc., can solve the problems of reducing the early strength of cement and soil, low early strength of cement and soil, etc. Effect

Pending Publication Date: 2022-04-15
宁波中淳高科股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the bearing effect of static drilling and rooting piles is severely tested in soils with high organic matter content, mainly due to the low early strength of cement soil around the piles.
Because soil with high organic matter content is acidic, and cement hydration requires an alkaline environment, so cement soil with high organic matter content will inhibit cement hydration, thereby reducing the early strength of cement soil around the pile body

Method used

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  • Early-strength cement-based grouting material as well as preparation method and application thereof
  • Early-strength cement-based grouting material as well as preparation method and application thereof

Examples

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preparation example Construction

[0027] In the present invention, a kind of preparation method of early-strength cement-based grouting material comprises:

[0028] Put the mineral powder and fly ash into a high-speed pulverizer after mixing them first, and grind for 30 minutes. The grinding method is: grind for 5 minutes and stop for 1 minute to obtain mineral powder-fly ash micropowder (material A). The speed of the high-speed pulverizer is 5200r / min, and the fineness of the output is less than 6um.

[0029] Then dry the natural gypsum powder and salt mud in a constant temperature oven at 105°C for 5 hours, and then grind the natural gypsum powder and salt mud in a pulverizer until the fineness is less than 10um.

[0030] Then, the finely ground mineral powder—fly ash micropowder (A material), gypsum powder, salt mud, and slaked lime are mixed, hydrated, aged, calcined, and ground to prepare B material, and the mixture (B material) is finely ground. The degree is less than 10um.

[0031] Finally, mix P.042...

Embodiment 1

[0041] Mix 40 parts of mineral powder and 10 parts of fly ash into a high-speed pulverizer and grind for 30 minutes. The grinding method is: grind for 5 minutes and stop for 1 minute to obtain mineral powder—fly ash fine powder (material A) , the speed of the high-speed pulverizer is 5200r / min, and the fineness of the output is less than 6um.

[0042] Dry 8 parts of natural gypsum powder and 2 parts of salt mud in a constant temperature oven at 105°C for 5 hours, and grind them with a pulverizer until the fineness is less than 10um.

[0043] The ground mineral powder-fly ash micropowder (A material), gypsum powder and salt mud, 8 parts of slaked lime are mixed, hydrated, aged, calcined, and ground to prepare material B, and the mixture ( Material B) The fineness is less than 10um.

[0044] Mix and stir 28 parts of cement, material B, and 4 parts of solid sodium silicate to obtain material C, and mix material C according to the water-cement ratio of 1.0 to obtain early-strengt...

Embodiment 2

[0047] Mix 38 parts of mineral powder and 10 parts of fly ash into a high-speed pulverizer, and grind for 30 minutes. The grinding method is: grind for 5 minutes and stop for 1 minute to obtain mineral powder—fly ash fine powder (material A) , the speed of the high-speed pulverizer is 5200r / min, and the fineness of the output is less than 6um.

[0048] Dry 4 parts of natural gypsum powder and 6 parts of salt mud in a constant temperature oven at 105°C for 5 hours, and grind them with a pulverizer until the fineness is less than 10um.

[0049] The ground mineral powder-fly ash micropowder (A material), gypsum powder and salt mud, 4 parts of slaked lime are mixed, hydrated, aged, calcined, and pulverized to prepare material B, and the mixture ( Material B) The fineness is less than 10um.

[0050] Mix and stir 25 parts of cement, material B, and 6 parts of solid sodium silicate to obtain material C, and mix material C according to the water-cement ratio of 1.0 to obtain early-st...

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Abstract

The invention discloses an early-strength cement-based grouting material as well as a preparation method and application thereof. The invention provides an early-strength cement-based grouting material. The early-strength cement-based grouting material is prepared from the following components in parts by weight: 80-100 parts of water, 25-40 parts of P.042.5 cement, 38-53 parts of mineral powder, 1-10 parts of fly ash, 4-8 parts of natural gypsum powder, 4-8 parts of slaked lime, 3-6 parts of solid sodium silicate and 2-6 parts of salty mud. According to the early-strength cement-based grouting material, mineral powder, coal ash, natural gypsum powder, solid sodium silicate, salty mud and other admixtures are added, an alkaline environment is provided for cement hydration of the cement-based grouting material, and therefore the early strength of cement soil around a pile body is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an early-strength cement-based grouting material and its preparation method and application. Background technique [0002] With the large-scale and rapid development of my country's infrastructure construction, large-scale buildings such as high-rise buildings are gradually increasing, which requires extremely high bearing capacity of pile foundations. In order to solve this problem, in recent years, due to its strong bearing capacity, no soil squeezing effect, no noise pollution, and small amount of slurry return, the application range of static drilled rooted piles has gradually expanded. Due to the special construction technology of static drilling and rooting, it mainly relies on the cement soil formed by the uniform mixing of surrounding mud and injected cement slurry to provide side friction resistance, and disperse the force borne by static drilling and rooting ...

Claims

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Application Information

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IPC IPC(8): C04B28/04E02D15/04C04B111/70
Inventor 孙元田张日红舒健健明维陈克伟严天龙
Owner 宁波中淳高科股份有限公司
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