Сoncrete shuttering systems – is an effective formwork product that saves the time and money of a building contractor.
Concrete shuttering systems – the process of creating forms into which concrete is poured to create ready-made concrete structures. Widely used in large residential and industrial projects.
Concrete shuttering systems: types, construction, order of removal.
In modern construction use 2 types of formwork: removable and non-removable. More removable formwork is common. It is made of plywood, wood, steel and aluminum.
The plywood used for concreting should be waterproof, to avoid distortion, cracking and rotting, while supporting concrete. Wide sheets of plywood are used to produce a flat, smooth surface after the concrete has set. Plywood is easy to work, give it different forms. Universal material. Reuse is possible if it is not damaged. Store plywood in a cool, dry place. Clean thoroughly after use. An alternative option for plywood is wood.
The fixed form of concrete formwork is made of steel or aluminum. It consists of long sections that can be folded together and secured with steel pins. This type of formwork is simple and easy to install, durable.
At cost more than plywood, bulky, and heavy. When a large number of forms may be difficult to transport due to the large weight.
Concrete shuttering systems performs the main task – to keep viscous concrete in place during solidification.
This means that the formwork must be integral, so that concrete does not flow out through the gaps and air gaps will not turn out. Often the bottom of the concrete formwork is placed in the ground to prevent concrete from leaking. If you can not prikopat, the bottom should be strengthened and weighted.
Concrete shuttering systems and its construction.
1. Preparing the mother.
2. Collecting and fastening formwork.
3. Cleaning and processing.
The order of removal.
Parts and connections are arranged in such a way as to facilitate removal, to prevent damage to the concrete and the formwork panels.
The engineer controls the entire process of removing the formwork to monitor the quality of concrete (free of defects in size and shape).
Separation of forms to be made without pressing scrap to concrete. Only wooden wedges.
The lower beams are removed only after removing their support.
Warm weather and the rapid hardening of concrete contribute to the rapid removal of the formwork.
Before removing all formwork gradually weakened, so as not to give a heavy load on the concrete.
Concrete shuttering systems and factors affecting the time of removal:
1. Concrete class. The higher the grade, the faster the rate of hardening.
2. Brand and type of cement. Fast setting cement has a high strength gain in a short period.
3. Temperature. The higher the temperature of the concrete itself during installation and the ambient temperature, the faster the strength is achieved.
4. The size of the concrete element.