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Cement admixture, and cement composition and concrete containing the cement admixture

A technology of cement admixture and cement composition, applied in the field of cement admixture, can solve the problems of prolonging the construction period of the structure and increasing the cost, and achieve the effects of excellent self-healing, maintaining water-stopping performance and good water-stopping performance.

Inactive Publication Date: 2011-01-19
安台浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the above-mentioned countermeasures such as repairing, waterproofing, and water-stopping construction will inevitably increase the cost or prolong the construction period of the structure, so it is desirable to omit as much as possible.

Method used

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  • Cement admixture, and cement composition and concrete containing the cement admixture
  • Cement admixture, and cement composition and concrete containing the cement admixture
  • Cement admixture, and cement composition and concrete containing the cement admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] The following examples illustrate the present invention in more detail, but the present invention is not limited by these examples.

[0044] [Evaluation of self-healing property based on cement composition]

[0045] (Preparation of cement composition: samples No.1-18)

[0046] Each component shown in the following Table 1 was mixed, and the cement composition of sample No. 1-18 was prepared. In addition, each component in following Table 1 is as follows. In addition, the unit of the numerical value in a table|surface is the weight% of the said component in the cement composition whole quantity.

[0047] OPC: Ordinary Portland Cement

[0048] CSA: calcium sulfoaluminate, DENKA CSA#20

[0049] Na-Ben: Na-bentonite, HOJUN (Super clay)

[0050] Talc: Nippon Talc Co., Ltd., general purpose talc (SSS)

[0051] Fly ash: Jpec Co., Ltd., class II fly ash

[0052] (Evaluation)

[0053] First, water was mixed with each of the above-mentioned cement compositions of Sample N...

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Abstract

Disclosed is a cement admixture that can realize the production of a concrete which has satisfactory self-curing properties and can maintain good self-curing properties for a long period of time. The cement admixture comprises an expanding material and an alumina silicate having swelling properties. The cement admixture is combined with cement to provide a cement composition. The cement composition is mixed with water and an aggregate to provide a concrete having excellent self-curing properties.

Description

technical field [0001] The present invention relates to a cement admixture, a cement composition containing the cement admixture and concrete. Background technique [0002] Concrete used to construct structures contains cement, water, aggregates, etc., and has the property of curing through hydration reactions. The cured concrete tends to be prone to cracks due to volume changes due to stress, temperature changes, drying, and the like. When such cracks occur, water is likely to penetrate through the concrete, causing water leakage and the like, and furthermore, the durability of the structure is reduced, and the appearance is deteriorated. In addition, for example, even in the case of an underground structure, cracks cause a problem of water leakage. In this case, since repairing the cracks is difficult, the cost becomes high. In the past, fillers were injected to repair cracks, or concrete was waterproofed and water-stopped, so that even if cracks occurred, the structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B14/04C04B14/10C04B22/06C04B22/08C04B22/10C04B22/16C04B24/26C04B28/02C04B103/60C04B111/20
CPCY10S106/04C04B28/02Y02W30/91C04B14/10C04B22/008C04B14/041C04B14/042C04B14/104C04B14/26C04B14/366C04B18/08C04B22/064C04B22/066C04B22/10C04B2103/302
Inventor 岸利治安台浩细田晓小林薰
Owner 安台浩
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