A method for evaluating the self-healing effect of internal cracks in cement-based materials
A technology of cement-based materials and internal cracks, applied in geometric CAD, special data processing applications, etc., can solve problems such as insufficient accuracy, and achieve high accuracy, remarkable effect, and strong directness.
Active Publication Date: 2020-07-28
佛山市利宇达建材有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
There are many methods currently used to characterize the self-healing of cement-based materials, such as strength recovery rate, permeability coefficient and acoustic emission method, etc. However, these methods are all indirect evaluations of the self-healing ability of cement-based material cracks, and have the disadvantage of insufficient accuracy
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0068] The mineral admixture for the self-healing of cracks in cement-based materials in the following examples is composed of expansion mineral components and crystal nucleus mineral components, and the cement composition ratio is shown in Table 1.
[0069] 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 preparation ratio is I-II, and then the water that quality accounts for 30% of the cement composition Add the cement composition of the above-mentioned proportion Ⅰ-Ⅱ and stir it, and mold it in a mold of 70mm×70mm×70mm to obtain a cement-based material sample. Part of the sample needs to be prefabricated by the inserting method during the molding process. The length of the piece is 8cm, the thickness is 0.5mm, demoulding after 24 hours, after the crack is prefabricated, use a cutting machine to cut along the direction perpendicular to the crack, and use a signa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to an internal crack self-healing effect evaluation method for a cement-based material. The method comprises the following steps of (1) performing crack prefabricating and marking: prefabricating a crack by adopting an insertion method and / or a cutting method, and marking a cement-based material sample with the prefabricated crack; (2) performing curing: soaking the marked cement-based material sample with the prefabricated crack in water for curing; and (3) obtaining an internal crack healing area, an internal crack healing product surface coverage rate and / or a healingproduct volume of a marked position of the cured cement-based material sample, namely obtaining evaluation index data for representing a self-healing effect of the cement-based material, and obtaininga self-healing evaluation result of the corresponding cement-based material. Compared with the prior art, the internal crack self-healing effect of the cement-based material is directly evaluated bytesting the internal crack healing area, the internal crack healing product surface coverage rate and / or the internal crack healing product volume; and the method has the advantages of strong directness, high accuracy and high innovativeness.
Description
technical field [0001] The invention relates to an evaluation method, in particular to a method for evaluating the self-healing effect of internal cracks of cement-based materials. Background technique [0002] For concrete materials, whether it is a reinforced concrete structure or a concrete member with a large thickness, cracks caused by shrinkage and external loads are inevitable. The existence and continuous expansion of cracks are the reasons for the reduction of the strength of concrete structures. Although some microcracks have little effect on the strength, they will greatly increase the transmission performance of the structure, and can cause harmful substances to aggravate the damage to the structure, such as steel corrosion caused by chloride ions and carbon dioxide. The self-healing system of cement-based materials provides a new method for the repair of micro-cracks in the concrete matrix and effectively delays potential damage. A self-healing system will elim...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 蒋正武袁政成朱新平
Owner 佛山市利宇达建材有限公司