A retarding water reducer for bored occlusal piles in subway

A technology of drilling occlusal piles and retarding water reducing agent, which is applied in the field of retarding water reducing agent, can solve the problem that the plastic preservation performance cannot meet the construction requirements of drilling occlusal piles, and the controllability of concrete setting time is not ideal and cannot be It is suitable for problems such as construction requirements of bored occlusal piles, and achieves the effects of good strength growth, low energy consumption and good adaptability

Inactive Publication Date: 2011-12-14
MAANSHAN CHINASEA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. CN101215116A discloses a retarded polycarboxylate water reducer, which uses polycarboxylate water reducer as the main component and has a certain air-entraining effect, but the retarded time of the product is longer At the same time, the plastic retention performance cannot meet the construction requirements of drilled occlusal piles; Chinese Patent Publication No. CN101549973A discloses a composite concrete high-efficiency water reducer. Air-entraining agent material composition, the product needs to be heated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A retarded water reducer for subway borehole occlusal piles is prepared, which mainly consists of naphthalene-based water reducer, fatty acid-based water reducer, hexametasorbitol, citric acid, maltodextrin, air-entraining components and Water composition; the mass percentage of each component is 25% of naphthalene-based water reducer, 20% of fatty acid-based water reducer, 2% of sodium hexametaphosphate, 4.0% of sorbitol, 4.5% of citric acid, 2% of maltodextrin, The air-entraining component is 0.2%, and the rest is water;

[0028] Naphthalene-based water reducer is a product of sulfonated industrial naphthalene. It is a LX-N model product sold by Ma'anshan Zhonghai New Material Co., Ltd. It is produced through sulfonation, condensation, and neutralization reactions of industrial naphthalene, sulfuric acid, formaldehyde, and sodium hydroxide. .

[0029] The fatty acid-based water reducer is the LX-Z model product sold by Ma'anshan Zhonghai New Material Co., Ltd.

[00...

Embodiment 2

[0036] Preparation of a retarded water reducer for subway borehole occlusal piles, which is mainly composed of naphthalene-based water reducer, fatty acid-based water reducer, hexametasorbitol, citric acid, maltodextrin, and air-entraining components The mass percentage of each component is 25% of naphthalene-based water-reducer, 20% of fatty acid-based water-reducer, 3.5% of sodium hexametaphosphate, 3.5% of sorbitol, 5.0% of citric acid, 3% of maltodextrin, air-entraining The composition is 0.2%, and the remaining ingredients are water; the preparation steps are the same as in Example 1, and the product is obtained, and the temperature during the preparation is 17 degrees Celsius. The product prepared in Example 2 is mixed with tap water, seal cement P042.5, Suzhou Runjian Ⅱ grade ash, Suzhou Runjian 5-25 crushed stone, Suzhou Runjian River sand medium sand, and S95, and the performance parameters of the test sample are:

[0037] Its performance parameter of the product that...

Embodiment 3

[0041] Preparation of a retarded water reducer for subway borehole occlusal piles, which is mainly composed of naphthalene-based water reducer, fatty acid-based water reducer, hexametasorbitol, citric acid, maltodextrin, and air-entraining components The mass percentage of each component is 25% of naphthalene-based water reducer, 20% of fatty acid-based water reducer, 4.5% of sodium hexametaphosphate, 3.5% of sorbitol, 5.5% of citric acid, 3% of maltodextrin, and air-entraining The composition is 0.2%, and the remaining ingredients are water; the preparation steps are the same as in Example 1, and the product is obtained, and the temperature during the preparation is 25 degrees Celsius. The product prepared in embodiment 3 is mixed with tap water, seal cement P042.5, Suzhou Runjian Ⅱ grade ash, Suzhou Runjian 5-25 crushed stone, Suzhou Runjian river sand medium sand, and S95, and the performance parameters of the test sample are:

[0042] Its performance parameter of the produ...

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PUM

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Abstract

The invention provides a retarding and water reducing agent for an occlusal pile of subway drilling, belonging to the field of retarding and water reducing agents. The retarding and water reducing agent mainly comprises the following components in percentage by mass: 15% to 25% of naphthalene series water reducing agent, 20% to 30% of fatty acid series water reducing agent, 2% to 6% of sodium hexametaphosphate, 3% to 5.5% of sorbitol, 4.5% to 6.0% of citric acid, 2% to 4.5% of maltodextrin, 0.2% of bleed air component and the balance of water. According to the invention, the coagulation time can be controlled freely to reach more than 72 hours through regulation of addition quantity and superposition action of various materials; and simultaneously, the steady increase of concrete intensity can be ensured and the product has good adaptability to various concrete materials.

Description

technical field [0001] The invention relates to a concrete retarding water reducer, in particular to a retarding water reducer for subway bored occlusal piles. Background technique [0002] Contemporary concrete mostly adopts commercial concrete and pumping construction technology. Commercial concrete is also called centralized mixing concrete, that is, the concrete mixed in the traditional on-site construction site is gathered to set up a mixing station, and the concrete mixed by it is transported to On the construction site, the pump truck is used to transport it to the construction level of the building (structure) through the pump pipe. Cement concrete has a setting time limit. Because the mixing station is far away from the construction site, it needs a certain transportation time. If the retarding treatment is not carried out, the concrete will harden and cannot be used even before it is transported to the construction site. When mixing concrete, it is necessary to ad...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/30
Inventor 佘祥海
Owner MAANSHAN CHINASEA NEW MATERIAL
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