Unlock instant, AI-driven research and patent intelligence for your innovation.

High-adhesion concrete interface adhesion method

A technology of interface bonding and concrete, which is applied in the direction of building maintenance, construction, coating, etc., can solve the problems of high cost, uneven dispersion, high price, etc., and achieve improved compactness, less dosage, and improved tensile bonding The effect of intensity

Pending Publication Date: 2022-04-01
四川省川铁枕梁工程有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its micro-nano-scale sheet structure, the application of G / GO in cement concrete needs to solve the problem of uneven dispersion, and G / GO is expensive, and the cost of directly mixing it into concrete or mortar is extremely high
These problems limit the large-scale addition of G / GO to concrete.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-adhesion concrete interface adhesion method
  • High-adhesion concrete interface adhesion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Carry out chiseling treatment on the surface of old C50 concrete, the chisel depth is 15mm, and remove floating ash, mortar or other stains on the surface.

[0025] To the surface of gained old concrete, evenly spray graphene oxide (GO) dispersion liquid, spraying density is 20g / m 2 , the composition of the dispersion liquid is: single-layer graphene oxide, the concentration is 2.0 mg / L, and the dispersant is cetyltrimethylammonium bromide with a concentration of 0.1 g / L.

[0026] After the pretreatment interface is basically dry, the adhesive mortar is covered on the obtained old concrete pretreatment adhesive surface, so that the old concrete and the adhesive mortar are closely combined. After the curing of the bonding mortar is completed, the bonding process of the bonding mortar and the old concrete is completed.

[0027] The mixing ratio of bonding mortar is shown in Table 1

[0028] Table 1 Adhesive mortar mix ratio (km / m 3 )

[0029]

Embodiment 2

[0030] Embodiment 2: to the surface of gained old concrete, evenly spray monolayer graphene (G) dispersion liquid, spray density is 50g / m 2 . Others are the same as in Example 1.

Embodiment 3

[0031] Embodiment 3: to the surface of gained old concrete, evenly spray monolayer graphene oxide dispersion liquid, spraying density is 50g / m 2 . Others are the same as in Example 1.

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

No PUM Login to View More

Abstract

The invention discloses a high-adhesion concrete interface adhesion method which comprises the following steps: firstly, chiseling a concrete interface, and then spraying graphene or graphene oxide dispersion liquid (hereinafter referred to as G / GO) serving as an auxiliary interface adhesion material on the surface of old concrete to form a pretreated adhesion surface; and finally, the pretreated bonding surface is covered with bonding mortar, so that the old concrete is tightly combined with the bonding mortar layer. The invention aims to attract more C-S-H generated by hydration of cement mortar to grow around the G / GO under the template action of the G / GO to form a very strong interface action and increase the compactness of a bonding interface between concrete and bonding mortar. The method overcomes the defect that the dispersion difficulty is high when the G / GO is conventionally mixed into the mortar, is simple and easy to operate, does not need to be repeatedly sprayed, is low in G / GO consumption and good in economy, does not need to consider the problem of uneven dispersion, and remarkably improves the interface bonding force of the bonding mortar and the concrete.

Description

technical field [0001] The invention relates to the technical field of bonding between concrete and mortar, in particular to a method for improving the bond strength of bonded mortar by G / GO pretreatment of the concrete interface. Background technique [0002] The cement mortar repair method used in the traditional concrete surface repair has the problems of low bonding strength and easy hollowing and falling off the interface. In order to improve the tensile bonding ability of the bonding mortar and the old concrete, the silicate The cement-based mortar is modified, such as polyvinyl acetate emulsion or redispersible latex powder, which increases the bonding strength between the cement mortar and the concrete base. [0003] In recent years, there have been many studies on the application of graphene and its derivatives in cement concrete. Studies have found that G / GO is a nanomaterial containing a large number of hydroxyl and carboxyl functional groups. These functional gro...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02C09D1/00C04B41/65
Inventor 杨奉源王艾文陈洪宇陈嘉琨
Owner 四川省川铁枕梁工程有限公司