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Shrinkage inhibitor suitable for marine engineering ultra-high performance concrete

A shrinkage inhibitor, ultra-high performance technology, applied in the field of shrinkage inhibitor of marine ultra-high performance concrete, can solve problems such as poor compressive strength, reduce cracking sensitivity, improve mechanical properties and shrinkage compensation effect, Significant effect of mechanical properties and shrinkage compensation

Active Publication Date: 2020-12-29
CCCC SECOND HARBOR ENG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another purpose of the present invention is to provide a shrinkage inhibitor suitable for marine ultra-high performance concrete, so as to solve the technical problem that the shrinkage inhibitor in the prior art can improve the shrinkage performance of performance concrete and improve the compressive strength poorly

Method used

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  • Shrinkage inhibitor suitable for marine engineering ultra-high performance concrete
  • Shrinkage inhibitor suitable for marine engineering ultra-high performance concrete
  • Shrinkage inhibitor suitable for marine engineering ultra-high performance concrete

Examples

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preparation example Construction

[0027] The preparation steps of the toughening agent are as follows: soak the ball-milled porous carrier in the polymer emulsion for 48 hours, remove and drain, and then place it in a ventilated and cool place to dry naturally for 18-24 hours. Stir to prevent sticking together.

[0028] The polymer emulsion can form a polymer network structure inside the cement-based material, refine the internal pores of the cement-based material, thereby improving the flexibility of the cement-based material, improving its crack resistance and the ability to resist crack propagation. A common practice in engineering is to directly mix polymer emulsion into concrete or mortar to increase the flexibility of cement-based materials, or as a repair mortar for joint filling. Polyurethane can also be used, but the direct incorporation of polymer emulsion will affect The hydration of the cementitious material has a great influence on the strength. The introduction of the porous carrier into the ceme...

Embodiment and 7

[0030] Add the shrinkage inhibitor suitable for marine ultra-high performance concrete of the present invention to ultra-high performance concrete, conduct experiments, and perform performance tests. A total of 3 groups of embodiments and 7 groups of comparative examples are set:

Embodiment 1

[0032] Adopting the components and the mixing ratio of the shrinkage inhibitor suitable for marine ultra-high performance concrete of the present invention, the specific data are as shown in Table 1.

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Abstract

The invention discloses a shrinkage inhibitor suitable for maritime engineering ultra-high performance concrete. The shrinkage inhibitor comprises a composite expanding agent, a defoaming agent, a humidity compensation medium, sepiolite and a toughening agent, and is added in the preparation process of the maritime engineering ultra-high performance concrete. The composite expanding agent, the humidity compensation medium and the toughening agent are used for adaptively compensating shrinkage step by step in different hydration stages in the hardening process of the ultra-high-performance concrete, and are matched with the sepiolite and the defoaming agent, so that the mechanical property and shrinkage compensation effect of the ultra-high-performance concrete are remarkably improved, andmeanwhile, the toughness of the ultra-high-performance concrete is enhanced, and the cracking sensitivity is reduced, so that the ultra-high performance concrete can be suitable for manufacturing engineering structures for construction service in harsh and severe environments.

Description

technical field [0001] The invention relates to the technical field of concrete performance regulation. More specifically, the present invention relates to a shrinkage inhibitor suitable for marine ultra-high performance concrete. Background technique [0002] Ultra-high performance concrete is a new type of cement-based engineering material with ultra-high impermeability and mechanical properties. It has ultra-high strength, toughness and durability. It is the most creative cement-based engineering material in the past 30 years and has achieved a great leap in the performance of engineering materials. As civil engineers pay more and more attention to the durability design of concrete materials, the demand for marine engineering structures continues to increase, and the construction of cross-sea bridges is in full swing, ultra-high performance concrete with excellent durability has broad application prospects. [0003] However, due to the large amount of cementitious mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26
CPCC04B40/0039C04B2201/50C04B22/064C04B22/066C04B2103/50C04B22/0006C04B22/08C04B24/26
Inventor 张国志杨荣辉陈飞翔王敏郑和晖彭成明陈平巫兴发田飞代浩李刚刘力徐鑫肖林杨建平奉思东陈尚雷
Owner CCCC SECOND HARBOR ENG