Advantages and Disadvantages of Plastic Building Formworks

Advantages and Disadvantages of Plastic Building Formworks

In the building market, the choice and utilizing of building formwork has always been the top priority of project quality and cost control. Lately, plastic formwork has develop into more and more essential in the building market.

Plastic building formworks have certain advantages. Firstly, it has the characteristics of waterproof, corrosion resistance, acid resistance and alkali resistance, and are especially suitable for use in underground and humid environments. The plastic formwork has high energy, strong toughness, robust impact resistance, strong elasticity, and isn’t simple to be deformed, thereby drastically 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 construction efficiency. The plastic formwork can be used together with varied wood boards equivalent to wood (bamboo) plywood.

After testing, the conventional using of plastic formwork can reach more than 30 occasions, which can significantly reduce the construction price, and the used formwork panels might be recycled, which is beneficial to the development of the formwork rental business. The plastic formwork doesn’t have to be coated with a launch agent throughout use, and is straightforward to clean by just water, therefore, the cleaning and maintenance costs of the forms are reduced. The surface of the plastic formwork is smooth, and it has good peeling property from concrete so is easy to demould. It may possibly tremendously speed up the development progress, shorten the construction period and assist to realize honest-faced concrete. In case of damage, the plastic formwork can recover, regenerate and reduce the pollution of waste to the environment.

Plastic building formworks even have sure disadvantages. It’s a newer in the concrete forms business, a powerful consultant of the new building concrete formwork, however because it is a new form of building formwork, there are still some deficiencies compared to the metal building formwork and the wooden building formwork.

First, the static bending power and static bending modulus of ordinary plastic building formworks are small compared with different formworks. The home utilized plastic building formworks are decrease in energy than bamboo (wood) one, and also decrease than overseas ones reminiscent of GMT building formworks. The load-bearing of plastic building formwork is comparatively low. The reason why it has a relatively low carrying capacity is because a lot of the plastic building formworks are mainly within the form of flat panels, which are mainly applied to the roof and floor slabs, , so just controlling the spacing between the secondary beams can meet the development requirements. Due to this fact, if a plastic building formwork is to be utilized to a wall column formwork, its energy must be high. The plastic building formwork is designed with a rib itself on the back of the formwork panels, which enormously 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 drastically affected by temperature. The data shows that at high temperatures, the 3m long formwork could be stretched from 3mm to 4mm. If the development is laid in the summer night, the center part of the formwork will be arched at noon. Due to this fact, plastic building formwork makes use of ABS plastic raw supplies, which successfully reduces the coefficient of thermal enlargement and contraction.

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