What are the application of cement blanket in construction industry?

Cement blanket is a kind of soft cloth impregnated with cement, which will react with water and harden into a very thin waterproof and fireproof durable concrete layer. The cement blanket is made of 3D fiber matrix woven with polyethylene and polypropylene filament, and contains dry concrete mixture with special formula. The main chemical components of calcium aluminate cement are Al2O3, Cao, SiO2 and Fe2O3. The bottom of the canvas is covered with polyvinyl chloride (PVC) backing to ensure that the cement blanket is completely waterproof. During site construction, there is no need for any concrete mixing equipment on site, as long as the cement blanket is simply watered or soaked in water to make it hydrated. After solidification, the fiber can strengthen the concrete and prevent cracking. At present, the cement blanket is 10 mm thick.

This looks like a normal thin gray blanket. But after pouring water, it will quickly become a hard layer of concrete! In fact, it combines traditional cement and textile fiber technology, and integrates impermeable and multifunctional concrete powder into the fiber skeleton. It has the characteristics of water-proof, moisture-proof, fire-proof and durable, and completely solves the problem of concrete cracking. It combines the toughness of textiles with the life and strength of concrete. If you want to lay the cement, just place it in the place where you are going to lay the cement and water it to solidify. Its lightness and toughness allow it to adapt to any terrain. You can also cut the size according to your needs.

The new cement blanket can not only save 90% material, but also shorten 60% construction period. The cement blanket has been valued at over 100 million yuan. Even in the United States, it is being purchased in large quantities and widely used. With the existence of fiber skeleton and the uniformity of concrete powder, this material will not crack after solidification and has a long service life. Cement blanket like cloth storage, transportation, laying up is also very convenient. The advantage of 2 cement blanket is that the construction is convenient, but the disadvantage is that the bending strength is low and the construction requirements are strict. Concrete canvas usually looks like an ordinary blanket.

Hanji cement blanket laying construction

1. Preparatory work

First of all, planning and measurement should be carried out to ensure a certain slope, so that the water can flow smoothly from the upper end to the lower end; second, after the construction site is cleaned and leveled, the construction line is set according to the design drawing, and the drainage slope is retested.

2. Excavation

The construction line shall be set up according to the design requirements, both sides of the ditch shall be leveled, and there shall be no empty soil and cavity on the slope surface of the ditch. To tamp the water damaged parts, in addition to the debris and gravel in the slope, if necessary, use Panax notoginseng lime soil compaction treatment, or grouting reinforcement after sealing, which requires that the treated parts have good stability!

3. Laying

The material can be laid vertically and horizontally. Please make sure that the base is smooth, otherwise it will affect the appearance quality!

4. Joint treatment

1. A pit with a width of 10 cm and a depth of one time of the cement blanket shall be excavated horizontally at the overlapped position of two adjacent cement blankets, and the joint of cement blanket at the overlapping place shall be put into place and flattened.

2. Press the upper cement blanket on the lower cement blanket along the water flow direction, and the overlapping position shall not be less than 10cm.

3. Apply sealant evenly at the joint.

4. Fix two pieces of cement blanket with Φ 5 * 38mm stainless steel screws.

5. Ditch edge treatment

Fix the edge of the material on the edge of the ditch with rivets, and fix the overlapped part with rivets. After fixing, cover the edge with soil

6. Water curing

Before watering, it is necessary to check and accept the whole laying before watering. Watering can only be carried out after it is qualified! Water 9kg per square meter (the thickness is calculated as 10 mm) should be thoroughly watered, and no less watering is allowed. Water should be evenly sprinkled from the edge to the middle. The best way is to spray the water with the flow rate of 4000ml / min until the color of the cement blanket becomes dark. Do not use high pressure water column! When the temperature is less than or equal to 5 ℃, insulation measures shall be taken; when the average temperature of day and night is higher than 30 ℃, the surface shall be covered with plastic film or geotextile and other materials to keep it moist, and the watering curing time shall not be less than 3 days