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Anti-dispersion intensifier for underwater cast-in-place pile concrete and using method thereof

An underwater pouring and concrete technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as broken piles, water wrapping, and difficulty in ensuring the quality of underwater cast-in-place piles

Active Publication Date: 2010-09-15
珠海市振业混凝土有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term practice has shown that even if the poured concrete is increased by two strength levels, the quality of the concrete for underwater pouring piles is still difficult to guarantee. broken pile

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The preparation method of the product of the present invention is as follows: weigh each component according to the aforementioned weight ratios, and mix polycarboxylate water reducer, hydroxyethyl methyl cellulose ether, starch ether, polyvinyl alcohol fiber, ultrafine slag powder, Sodium tripolyphosphate, sulfoaluminate cement clinker, and desulfurized gypsum are physically and mechanically mixed and stirred evenly to obtain this product.

[0054] In the present invention, the polycarboxylate water-reducer has good fluidization effect, and its presence helps to improve the fluidity of the concrete mixture, so that the concrete can be filled in the entire pre-drilled hole to the greatest extent after it is poured underwater Space, and compared with naphthalene-based water-reducers and lignosulfonate water-reducers, polycarboxylate-based water-reducers have better adaptability to viscosity-increasing components such as hydroxyethyl methyl cellulose ether and starch ether...

Embodiment 1

[0064] The anti-dispersion reinforcing agent for underwater pouring pile concrete is prepared according to the following weight ratio: polycarboxylate water reducer 100, hydroxyethyl methyl cellulose ether 40, starch ether 40, polyvinyl alcohol fiber 1600, ultrafine slag Powder 2000, sodium tripolyphosphate 20, sulfoaluminate cement clinker 800, desulfurized gypsum 400.

[0065] Adding the anti-dispersion reinforcing agent according to 8% of the mass of the cementitious material can make the slump of the concrete reach 24cm, the slump expansion reach 62cm, the fluidity can be maintained for 1 hour and 40 minutes without loss, and the water-land strength ratio can reach 90%. The 14-day expansion rate reaches 0.010%, and the impermeability level reaches P12.

Embodiment 2

[0067] The anti-dispersion reinforcing agent for underwater pouring pile concrete is prepared according to the following weight ratio: polycarboxylate water reducer 100, hydroxyethyl methyl cellulose ether 100, starch ether 70, polyvinyl alcohol fiber 1000, ultrafine slag Powder 5000, sodium tripolyphosphate 65, sulfoaluminate cement clinker 2500, desulfurized gypsum 2000.

[0068] Adding the anti-dispersion reinforcing agent according to 5% of the mass of the cementitious material can make the slump of the concrete reach 22cm, the slump expansion reach 55cm, the fluidity can be maintained for 1 hour and 30 minutes without loss, and the water-land strength ratio can reach 94%. The 14-day expansion rate reaches 0.020%, and the impermeability level reaches P14.

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Abstract

The invention discloses an anti-dispersion intensifier for underwater cast-in-place pile concrete, which comprises a polycarboxylic acid water reducer, hydroxyethyl methyl cellulose ether, starch ether, polyvinyl alcohol fiber, superfine ground slag, sodium tripolyphosphate, sulphoaluminate cement clinker and desulfurized gypsum. According to the technical scheme, when the product of the invention is added in underwater cast-in-place pile concrete during the preparation of the underwater cast-in-place pile concrete, the flocculability of the concrete is increased, the anti-dispersion performance is improved in a concrete casting process, the increase effect of the post strength of the concrete is obvious, the concrete has certain expansibility, the friction between the pile body and the soil is increased, and the bearing capacity of the pile body is improved.

Description

technical field [0001] The invention relates to an anti-dispersion reinforcing agent for underwater pouring pile concrete and a using method thereof. Background technique [0002] There are many designs of underwater cast-in-situ piles for foundation reinforcement in the southern region. The strength grade of concrete for underwater cast-in-place piles is generally C25-C40. The influence of groundwater flow is considered in the specific design. Generally, the design strength grade of concrete is generally raised by one grade. For example, the concrete for underwater cast-in-place piles of C25 is designed and prepared according to C30 on land . However, long-term practice has shown that even if the poured concrete is increased by two strength levels, the quality of the concrete for underwater pouring piles is still difficult to guarantee. Broken pile. According to the test of the applicant of the present invention, after the concrete with strength C50 prepared on land is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B2111/00362C04B2111/2038C04B40/0039Y02W30/91C04B7/32C04B11/264C04B16/0641C04B18/146C04B20/0076C04B22/16C04B24/2641C04B24/38C04B24/383C04B28/02C04B2103/302
Inventor 赵利华黄海燕韩强
Owner 珠海市振业混凝土有限公司
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