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Mineral admixture for self-healing of cement-based material crack and preparation method and application of mineral admixture

A technology of mineral admixture and cement-based materials, applied in the field of building materials, can solve the problems of compatibility between self-repairing medium and concrete matrix, degradation of matrix structure performance, etc., and achieve low cost, high solution cost and remarkable effect Effect

Inactive Publication Date: 2013-05-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these new active self-healing methods are still unable to solve the problems of poor compatibility between the introduced self-healing medium and the concrete matrix, and the degradation of the structural performance of the matrix.

Method used

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  • Mineral admixture for self-healing of cement-based material crack and preparation method and application of mineral admixture
  • Mineral admixture for self-healing of cement-based material crack and preparation method and application of mineral admixture
  • Mineral admixture for self-healing of cement-based material crack and preparation method and application of mineral admixture

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Embodiment Construction

[0033] The technical solutions of the present invention are illustrated below through specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0034] The cement-based material crack self-healing mineral admixture of the following examples is composed of a silicon-based mineral component, a silicate mineral component, an expanded mineral component and a crystalline mineral component, and is stirred in a mixer for 3-10 minutes It is prepared by mixing evenly; according to the different widths of cracks to be healed, by adjusting the ratio of each raw material component, mineral admixtures with different components and effects can be obtained.

[0035] The components listed in each row in Table 1 are mixed together to prepare the cement composition (cement and mineral admixture, cement is P.O.52.5 cement) that the proportioning ratio is Ⅰ-Ⅲ, and then the wat...

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Abstract

The invention relates to a mineral admixture for self-healing of a cement-based material crack. The mineral admixture comprises the following components by weight percentage: 20-55% of silica-based mineral, 10-30% of silicate mineral, 30-60% of expansion mineral and 5-30% of crystal mineral. A preparation method comprises the steps of weighing the raw components, adding the weighed components into a stirrer, stirring for 3-10min until the components are mixed uniformly, and obtaining the mineral admixture. The mineral admixture is added into a cement-based material; when the cement-based material generates a crack, the mineral admixture generates an insoluble deposit in the cement-based material crack to fill and seal the cement-based material crack; and the self-healing of the cement-based material crack is realized.

Description

technical field [0001] The invention relates to a mineral admixture for self-healing of cracks in cement-based materials, a preparation method and application thereof, and belongs to the field of building materials. Background technique [0002] Cement-based materials, such as mortar, concrete, etc., due to their high brittleness, tend to crack during use under external loads or environmental effects, resulting in cracks of varying degrees. Many researches have proposed many concrete crack repair methods suitable for various environmental conditions, such as reinforcement repair, anchorage, bonding, pouring, and cathodic protection. These crack repair methods play an important role in improving the durability of concrete structures. However, these methods still have great limitations for the repair of cracks in concrete structures in water environments. Traditional repair methods are very uneconomical and in many cases even ineffective. These methods are mainly post-passiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C04B22/14C04B24/06C04B22/10
Inventor 蒋正武韩超周磊杨凯飞杨正宏
Owner TONGJI UNIV
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