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Within the construction market, the choice and utilizing of building formwork has always been the top priority of project quality and value control. Lately, plastic formwork has develop into more and more necessary in the construction market.

Plastic building formworks have sure advantages. Firstly, it has the characteristics of waterproof, corrosion resistance, acid resistance and alkali resistance, and are especially suitable to be used in underground and humid environments. The plastic formwork has high strength, strong toughness, strong impact resistance, strong elasticity, and isn’t straightforward to be deformed, thereby tremendously improving the reusable of the formworks.

Secondly, the plastic formwork has all specifications, light weight, light and straightforward to dismantle the mold, safe and reliable construction operation and handling, low labor intensity and high development efficiency. The plastic formwork can be utilized collectively with varied wood boards such as wood (bamboo) plywood.

After testing, the normal utilizing of plastic formwork can attain more than 30 occasions, which can enormously reduce the development value, and the used formwork panels will be recycled, which is beneficial to the development of the formwork rental business. The plastic formwork does not should be coated with a release agent during use, and is simple to clean by just water, therefore, the cleaning and maintenance prices of the forms are reduced. The surface of the plastic formwork is smooth, and it has good peeling property from concrete so is simple to demould. It will probably greatly speed up the construction progress, shorten the development interval and assist to realize honest-faced concrete. In case of damage, the plastic formwork can recover, regenerate and reduce the air pollution of waste to the environment.

Plastic building formworks even have certain disadvantages. It’s a newer in the concrete forms industry, a robust representative of the new building concrete formwork, however because it is a new form of building formwork, there are still some deficiencies compared to the steel building formwork and the wooden building formwork.

First, the static bending strength and static bending modulus of ordinary plastic building formworks are small compared with different formworks. The domestic applied plastic building formworks are lower in strength than bamboo (wood) one, and likewise lower than foreign ones equivalent to GMT building formworks. The load-bearing of plastic building formwork is comparatively low. The reason why it has a comparatively low carrying capacity is because a lot of the plastic building formworks are mainly in the form of flat panels, which are mainly utilized to the roof and floor slabs, , so just controlling the spacing between the secondary beams can meet the construction requirements. Due to this fact, if a plastic building formwork is to be utilized to a wall column formwork, its power must be high. The plastic building formwork is designed with a rib itself on the back of the formwork panels, which vastly enhances the power of the formwork for wall formwork.

Second, the thermal growth and contraction coefficient of ordinary plastic building formworks is larger than that of steel and wood, because plastic building formworks are greatly affected by temperature. The data shows that at high temperatures, the 3m long formwork might be stretched from 3mm to 4mm. If the development is laid in the summer night, the middle part of the formwork will be arched at noon. Therefore, plastic building formwork makes use of ABS plastic raw materials, which effectively reduces the coefficient of thermal enlargement and contraction.

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