Demolition of buildings (Demolition Melbourne)  has become commonplace, as buildings have collapsed due to natural causes such as earthquakes and human factors, such as labor shortages, and a wider phenomenon has begun to emerge. Recently, two large buildings in the city of Kiambu have collapsed, and Haiti is currently experiencing a strong earthquake.

Local authorities did not implement building codes in Haiti’s 2010 [Rie’s 7.0] and China-Sichuan-2008 seismic design factors [size 7.9 because earthquakes cannot kill humans, so disasters are widely attributed to disasters. .. only poorly designed buildings can do this.

Well-designed buildings have good seismic load factors and can withstand any typical earthquake without dying. In areas with unstable earthquakes, the seismic load factor must be high and the government has the responsibility to ensure that these building codes are respected by appropriate local authorities. For example, the seismic load factor of Nakuru in the Rift Valley should be higher than Nairobi.

Demolition Melbourne- Demolition method

If people are still trapped inside a building, it is important to carefully choose the method of removal so as not to harm the trapped person. During the earthquake in Haiti, only about 70 people were alive and more than 100,000 died. These data show that a quick response to the release of trapped people in collapsed buildings is very helpful in saving lives. The method chosen must be implemented very quickly, inexpensive and does not require special manpower.

  1. Pneumatic and hydraulic circuit breakers

These apply to the removal of pavements, roads and reinforced concrete slabs. They can be mounted on a backhoe or hand shovel. Factors such as the size of the hammer and the strength of the reinforced concrete will determine the speed at which the work will be removed. The main disadvantage of this method is that it requires specialized machines, skilled labor and produces noise, dust and vibration.

  1. Pressure explosion: mechanical bursting and chemical bursting

There are two types of pressure explosions: mechanical explosions and chemical explosions.

Mechanical explosion: In this method, a hydraulically operated splitter is inserted into the hole of the concrete slab and the slab is forced to rupture.

Chemical explosion: In this method, the cracking agent is mixed with cold water to form a grout, and the grout is poured into a hole previously drilled in the concrete. It undergoes a chemical reaction [hydration] and begins to expand, applying a pressure greater than 500 kg / cm2, which is much stronger than the tensile strength of concrete. Drill holes along the required crack line. These holes are typically about 2 cm wide and spaced about 10 to 20 cm apart. This pressure destroys the concrete after a certain period of time, usually between 6 hours and 24 hours.

The cracking time depends on the ratio of chemicals, added water and ambient temperature. The higher the dose and temperature, the faster the cracking. The advantage of this method is that it does not require machines, skilled labor, and no noise or dust. The disadvantage is the risk of an explosion hole in the first 3 hours, because if the chemical is explosive, such as CRACK-AG, the chemical reaction.

Other non-explosive substances such as BETONAMIT CHEMICAL BURSTING will operate without explosion hazard.

In the case of earthquakes such as the Port of Taimung, Haiti or the Kiambu disaster in Kenya, this method is very effective, because in both cases, the financial capacity to transport heavy machinery is not high because of the storage

  1. Dismantling

This is done by cutting the concrete element and then removing it with a shovel or crane. This method is useful for removing a portion of a building because it does not structurally affect the remaining structure.

When the concrete members are cut and then removed with a crane, the complete concrete structure can be removed with minimal noise, dust and impact on the surrounding structure.