In-situ And Precast Concrete Processes And Uses
In construction engineering there are different ways in which concrete(in-situ or precast concrete) is being prepared for use at job sites.
This is because every job site do not require the same technique and methods. The in-situ concrete is mostly used for smaller construction jobs at site due to it nature.
On the other hand the precast concrete is preferable for larger construction projects because of it quality, efficiency, durability and economic nature.
To understand the concept of in-situ and precast concrete one will need to know the meaning, processes, advantages and their uses over each other.
MEANING AND PROCESSES OF IN-SITU CONCRETE
This can still be refereed to as Site Cast Concrete. it is the type of concrete work that does not require much quality control process.
The preparation of in-situ concrete is done at the construction site base on their mix ratio and poured in to reinforce concrete form work at jobs site. it is mostly suitable for smaller construction jobs.
MEANING AND PROCESSES OF PRE-CAST CONCRETE
As oppose to the the in-situ concrete, this type of concrete preparation requires strict adherence to quality control process. it is being prepared base on their concrete mix design and not concrete mix ratio. Want to know more on concrete mix ratio click here.
The process involves preparing the concrete in a more controlled environment, pouring the concrete in preferred reinforce mold shapes and sizes and allowing it to gain maximum strength before taking it to the site for assemble. it is mostly suitable for larger construction jobs.
ADVANTAGES AND DISADVANTAGES OF PRECAST CONCRETE OVER IN-SITU CONCRETE
The in-situ concrete is more cost friendly when use in smaller construction but can be very cost ineffective when used for larger construction projects. This is because cost of labour and materials for larger jobs will be too high to procure.
On the other hand the precast concrete will not be cost friendly for smaller construction jobs but will be very cost friendly for larger construction jobs. This is because the cost of procurement on materials and time requirement for smaller jobs will be enough to complete the whole job.
The in-situ concrete does not need to be carried about from one point to the other and this makes it easier to handle small construction job projects.
While the precast concrete will need mechanical means to fix the concrete into position and this will lead to high cost if used in smaller construction projects.
The preparation of in-situ concrete is controlled by variable factors like temperature change, humidity,wind etc. which can greatly affect the maximum required strength of concrete and can result to poor concrete work.
For the precast concrete the preparation is always done in a more controlled environment and cognizance is always taking into account for its maximum strength before taking it to construction site for assembling.
The in-situ concrete requires lots of concrete form works and labourer at job site which can increase cost of buying and re buying of materials at different level of the work process and also cost of hiring of labourer to complete the work process at job site.
While the precast concrete requires less labour and no form work material to assemble it at construction site.
For the in-situ concrete there is always the tendency to waste materials during pouring of concrete into form works since it is always done by unskilled labourer and in an uncontrolled environment.
While the precast concrete tend to minimize concrete waste to the barest minimum since it is always done by skilled workers and in a more controlled way by using mechanical means.
For the in-situ concrete, during construction, the weather condition plays a very negative role in reducing the rate of time to complete the construction process because during raining period all in-situ construction works tends to slow down if not put to halt.
While for the precast concrete, during construction the weather condition do not really play much role in the rate of delivery period since all precast construction works that are carry out during raining period can easily be assembled without rain affecting the process.
USES OF IN-SITU CONCRETE AND PRECAST CONCRETE
The both concrete methods are suitable for use in construction works projects. The preferred one to use at any particular site will largely depends on the nature, type, sizes and accuracy of the projects.
If you are embarking on a small scale building project considering adopting the in-situ concrete methods since it is always cheaper to implement for small scale projects.
On the other hand if you are embarking on a large scale projects you can adopt the precast concrete method for more efficient, durability and uniformity of the work project.
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