How to deal with cracks in the main body of the exterior wall
Cracks in the main body of exterior walls are a common problem in construction, which not only affects the appearance, but may also threaten structural safety. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the causes, treatment methods and preventive measures of exterior wall cracking, and provide structured data for reference.
1. Common causes of exterior wall cracks
| Reason type | Specific instructions |
|---|---|
| material shrinkage | Cracks caused by shrinkage of cement mortar or concrete during drying |
| temperature change | Thermal expansion and contraction cause uneven stress in wall materials |
| foundation settlement | Uneven settlement of foundation causes wall cracking |
| Construction technology | Irregular construction, inadequate maintenance, etc. |
| external force | Caused by external forces such as earthquakes and impacts |
2. How to deal with cracks in exterior walls
Depending on the type and severity of the crack, treatments vary:
| Crack type | Treatment method | Applicable scenarios |
|---|---|---|
| surface cracks | 1. Clean cracks 2. Fill with elastic sealant 3. Surface repair | Non-structural cracks with width <0.2mm |
| structural cracks | 1. Professional testing and evaluation 2. Structural reinforcement 3. Epoxy resin injection | Penetrating cracks with width >0.3mm |
| active cracks | 1. Install expansion joints 2. Fill with flexible materials | Cracks that continue to move due to temperature changes |
3. Detailed explanation of processing steps
1.Crack detection and assessment
Use crack width gauges and other tools to measure the width, depth and direction of cracks to determine whether they affect structural safety.
2.surface treatment
Remove any loose parts around the cracks and clean away dust with a wire brush, using high-pressure air if necessary.
3.fill repair
Choose the appropriate filling material based on the type of crack:
| Material type | Features | Applicable to cracks |
|---|---|---|
| Elastomeric sealant | Good flexibility and strong weather resistance | surface cracks |
| Epoxy resin | High strength and strong bonding force | structural cracks |
| Polyurethane grouting material | Good fluidity and strong waterproofing | water seepage cracks |
4.surface modification
After the filling material has solidified, polishing, coloring and other treatments are performed to restore the appearance consistency.
4. Preventive measures
1.design stage
Set up expansion joints reasonably and use materials with good crack resistance.
2.construction stage
Strictly control construction quality and do maintenance work well.
3.Use stage
Perform regular inspections and maintenance, and deal with minor cracks in a timely manner.
5. Professional advice
For severe exterior wall cracking problems, it is recommended to:
| situation | Recommended actions |
|---|---|
| Crack width＞2mm | Contact a professional testing agency immediately |
| Cracks continue to grow | Conduct structural safety assessment |
| Accompanied by water seepage | Prioritize waterproofing issues |
6. Latest industry trends
According to hot spot monitoring across the entire network in the past 10 days, there are the following new trends in the field of exterior wall repair:
1. The application of new nano-repair materials has increased, and the repair effect has increased by 30%.
2. Drone crack detection technology is gradually becoming more popular, and detection efficiency has increased by 5 times.
3. Intelligent monitoring systems are beginning to be applied to large buildings, which can provide real-time warning of crack expansion.
Conclusion
The problem of cracking in exterior walls requires targeted measures based on specific circumstances. Minor cracks can be dealt with by yourself, but for serious problems be sure to seek professional help. Regular inspection and timely maintenance are effective ways to prevent cracking.
check the details
check the details
en
