A self-healing microcapsule concrete capable of fixing carbon dioxide

A technology of self-healing microcapsules and carbon dioxide, which is applied in the field of self-healing concrete, can solve problems such as becoming solid waste, environmental problems, and reduced adsorption efficiency of carbon dioxide solid adsorbents, and achieve the effect of reducing solid waste generation and emissions

Active Publication Date: 2020-06-30
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after multiple regeneration cycles, the adsorption efficiency of carbon dioxide solid adsorbent decreases
Eventually, a large amount of carbon dioxide solid adsorbents that adsorb carbon dioxide become solid waste, causing serious environmental problems

Method used

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  • A self-healing microcapsule concrete capable of fixing carbon dioxide
  • A self-healing microcapsule concrete capable of fixing carbon dioxide

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Embodiment Construction

[0022] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments of the present invention. The dimensions of the drawings are not to scale with the actual dimensions, and the dimensions of some components may be exaggerated in order to clearly show some features.

[0023] The purpose of the present invention is to provide a self-repairing microcapsule concrete capable of fixing carbon dioxide, which can realize self-repair function and reduce carbon dioxide solid adsorbent waste. Specifically, the self-healing microcapsule concrete of the present invention includes steel capsules dispersed in self-compacting concrete, and the steel capsules include brittle ceramic rings to break in time when stressed. In addition, the steel capsule includes a carbon dioxide solid adsorbent that has adsorbed carbon dioxide as a capsule core, and the carbon dioxide is separated from the carbon dio...

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Abstract

The invention relates to self-repairing microcapsule concrete capable of immobilizing carbon dioxide. The microcapsule concrete comprises self-compacting concrete and first steel capsules dispersed therein, wherein each of the first steel capsules comprises a first steel capsule wall, first capsule cores and first ceramic rings, each of the first capsule cores comprises a carbon dioxide adsorbent having absorbed carbon dioxide, and the first ceramic rings are arranged at the central part of the steel capsule. The fragile ceramic rings are timely broken with stress; after breakage of the ceramic rings, carbon dioxide diffuses from the steel capsules and reacts with free calcium ions in water to produce solid calcium carbonate which fills in cracks. The self-repairing microcapsule concrete has the beneficial effects that the self-repairing microcapsule concrete realizes an intelligent self-repairing function, converts carbon dioxide into calcium carbonate so as to reduce discharge of carbon dioxide, and can recover the solid carbon dioxide adsorbent and reduce generation of solid waste.

Description

technical field [0001] The invention relates to the technical field of self-repairing concrete. Specifically, the present invention relates to a self-healing microcapsule concrete capable of fixing carbon dioxide. Background technique [0002] Cracks in cement-based materials are the root cause of premature failure of building structures. The field has been working on developing concrete with self-healing functions. [0003] Chinese invention patent application 201210580233.4 discloses a composite capsule underground structure concrete self-repair system with built-in aerobic microorganisms. The basic idea is that when cracks appear in the concrete, the capsule will be broken to activate the dormant microorganisms, and the carbon dioxide released through microbial respiration and The free calcium ions in the water react to form solid calcium carbonate, thereby repairing and filling the cracks. But calcium hydroxide is slightly soluble in water, so free calcium ions are no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/00C04B22/00C04B22/06
CPCC04B40/0039C04B20/0028C04B2103/0078C04B22/064
Inventor 尚文涛
Owner SHANDONG JIANZHU UNIV
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