What are the precautions for cement blanket maintenance?

Hanji cement blanket post-maintenance and precautions

1. This material is used in the central region of my country, with a design life of more than 50 years. In order to extend the life, it is recommended to maintain the material every 5-10 years. Brushing a layer of cement slurry on the surface of the material cement blanket can effectively extend the life of the material.

2. After the strength of the material reaches 10.0MPa, it can bear the load of personnel and light construction machinery.

3. After the material is poured into water, it must not be knocked or pulled until the final strength is formed; sharp objects must not be used to knock on the material.

Cement blanket is a soft cloth impregnated with cement. It will hydrate in water and harden into a thin waterproof and fireproof durable concrete layer. The new cement blanket uses a three-dimensional fiber composite structure (3Dfibrematrix) woven from polyethylene and polypropylene filaments, and contains a specially formulated dry concrete mix (Dryconcretemix). The main chemical components of calcium aluminate cement are Al2O3, CaO, SiO2, Fe2O3. The bottom surface of the canvas is covered with polyvinyl chloride (PVC) lining to ensure that the cement blanket is completely waterproof. During on-site construction, there is no need for any concrete mixing equipment on site, as long as the concrete blanket is simply watered or immersed in water to cause hydration reaction. After setting, the fibers act to strengthen the concrete and prevent cracking. Currently, cement blankets have a thickness of 10 mm.

In fact, the new cement blanket is a combination of traditional cement and textile fiber technology, and the anti-seepage and multi-functional concrete powder is integrated into the fiber skeleton. It has the characteristics of waterproof, moisture-proof, fireproof and durable, and it also completely solves the problem of concrete cracking. It can be widely used in the fields of railway, highway, water conservancy, and agricultural irrigation. The most important thing is that the cement blanket can not only save 90% of the material, but also shorten the construction period by 60%.