Firstly, the causes of external wall leakage are introduced.
1. Analysis of common concrete perforated brick materials. According to the local actual situation in recent years, almost 100% of the external walls made of ordinary concrete perforated bricks have cracks and water seepage.
2. Brick is larger than solid clay brick, and masonry with less mortar joint has poor shear capacity, which is easy to cause horizontal cracks, step cracks and peripheral cracks in masonry due to horizontal force or other factors.
3. Brick has low water absorption and mortar hardens slowly. When the strength of brick is insufficient, early masonry displacement, looseness and cracking are caused by early formwork support and concrete pouring.
Brick is made of concrete, and its drying shrinkage is its characteristic. Its shrinkage is between 0.35 and 0.45 mm/m, which is greater than the linear thermal expansion coefficient of clay brick. The shrinkage of concrete tends to be stable after 180d, and the drying shrinkage of concrete increases the internal force of concrete, which is one of the reasons for wall cracking.
5. The thermal performance of brick is poor, and the expansion and contraction of roof has a great thrust on masonry, which is easy to produce splayed cracks.
Second, the external wall leakage maintenance company introduction
1, Shaoxing Xiu De Hao Wall Leakage Prevention Engineering Co., Ltd. is a special construction unit specializing in external wall cracks, leakage maintenance, paint renovation, safe delivery of billboards, ceramic tile paint renovation, external wall glass cleaning and boiler paint renovation. The development of the company is a history of development from scratch and from big to strong. The construction achievements are spread all over the country, inside and outside the Great Wall. With advanced technology and reliable quality assurance measures, the above projects have been highly praised by relevant owners. We are willing to contribute to the development of the construction industry with rich construction experience, first-class technology, first-class management, first-class products, first-class service and professional construction team for many years.
2. Xinyang Jinhualan Mining Co., Ltd. is a high-tech modern enterprise integrating R&D, production and sales of expanded perlite, vitrified beads, perlite insulation board and perlite filter aid.
3. Xiamen Diyou Home Technology Co., Ltd. sells and wholesales waterproof coatings, waterproof agents, leather care and furniture care, and enjoys a high status among consumers. The company has established long-term and stable cooperative relations with many retailers and agents.
Weifang BASF Waterproof Technology Co., Ltd. is an enterprise engaged in research and development, production, sales, construction and brand operation of waterproof materials. The company has advanced scientific research technology and experienced professional technicians, focusing on the technical research and development of waterproof materials, the research of waterproof construction projects and the design and operation supervision of waterproof projects; Its exposed waterproof materials are world-renowned and occupy a decisive position in the same industry in the world.
What are the causes of external wall leakage, and what are the maintenance companies for external wall leakage? Bian Xiao will introduce them here. I hope that through Bian Xiao's introduction, parents will not panic when there is water leakage on the external wall.