Precautions for using high-strength road repair materials in highway pavement repair

Grouting material C60 equipment installation manufacturer spot Makino CGM foundation bolt secondary grouting material

For the selection and use of stone protection products, in addition to understanding product performance, the following points should also be noted: compatibility. Choose products that do not affect the color of the stone. If it is wet pasting construction, it is necessary to check whether it will affect the bonding strength between the stone and cement when processing the back of the stone. In the case of wet pasting construction, it is necessary to handle the back and side of the stone well, so it is important to focus on selecting protective agents with good waterproof effects. The selection of protective agents for ground stone should not only ensure the waterproof treatment of the back curtain and the surface, but also provide appropriate protective treatment for the front of the stone according to different usage environments. For some special places, such as hotels, it is necessary to choose products with good anti fouling performance, and for hotels, protective products with good anti fouling and anti oil effects. The construction process of short groove and through groove dry hanging method is basically the same as that of steel pin dry hanging method. The main difference between them is the groove form and hanging form of the board. In the short groove dry hanging method, two short flat grooves should be opened on the upper and lower edges of each stone slab, and the length of the short flat groove should not be less than 1mm. The groove should be within the effective length. The depth should not be less than 15mm; the groove width should be 6mm or 7mm. The groove width of the through groove dry hanging method stone slab should be 6mm or 7mm, and the groove should be polished to a 45 ° chamfer. The through slot type and short slot type are basically the same. The FZP anchor bolt with back bolt dry hanging method is designed according to the convex shape combined with anchoring function.

When high-strength road repair materials are applied to road surface repair, a lot of things need to be mixed in order to achieve strength. Although high-strength road repair materials have high strength, they are relatively brittle overall. In this case, it is recommended to add steel fiber high-strength road repair materials during the mixing process, which can produce buffering under huge pressure.  

Secondly, it is necessary to choose high-strength road repair materials that solidify quickly and reach strength within 2 hours, because during road repair, it is necessary to open to traffic in a short period of time.

Then, when selecting steel fibers, it is important to pay attention to the proportion of addition, which depends on different situations, such as high-strength road repair materials and steel

Please refer to the guidance of technical personnel from the grouting material manufacturer for the proportion of fibers.

Grouting material C60 equipment installation manufacturer spot Makino CGM foundation bolt secondary grouting material

The application of floating beads in insulation riser sleeves. Insulation riser sleeves are insulation products used in metallurgical industry casting. In the past, lightweight insulation materials such as expanded perlite and ceramic particles were used as aggregates in cement products, and fiber composite products were also used abroad. Recently, it has been discovered that floating beads have superior properties such as high temperature resistance, thermal insulation, and thermal insulation, so floating beads are chosen to produce insulation foam. Float bead insulation foam is a type of insulation product made from pure float beads as aggregates and water glass as cementitious material, through processes such as mixing, molding, and drying. Currently, multiple factories in China have used float beads to produce insulation foam, with more than 8 types of products in the series.

Steel fibers need to be added during the mixing process to ensure even mixing.

Cleaning the road surface:

1. The road surface needs to be cleaned thoroughly and there should be no debris

2. Need to carve out a certain height for grouting

3. Need maintenance, watering and moisturizing the road surface

4. After the road repair, it will be open to traffic in about 2 hours.

Engineering tests have shown that using composite material air ducts can save about 5-1cm in floor height compared to using galvanized iron sheet air ducts. The service life of galvanized iron sheet is easy to rust in humid environments, and another commonly used insulation material for galvanized iron sheet air ducts, glass fiber, is prone to become brittle after absorbing moisture. Therefore, the service life of galvanized iron sheet air ducts is only about 5 to 1 year. Due to the general service life of household air conditioning units being 15 to 2 years, if galvanized iron sheet air ducts are used, they need to be replaced during use, which can cause significant inconvenience to users. According to foreign experience, the service life of composite material ducts such as phenolic aluminum foil composite ducts is about 2 years, which is basically the same as the service life of household air conditioning units. Therefore, there is no need to replace the ducts during the entire use of household air conditioning.

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