It is respectfully stated that I have been working with the XYZ company for 8 years. XYZ is a construction-based company that provides services to various people through the construction of houses, buildings, offices, malls, roads, highways, etc. It is a huge company with hundreds of employees and is capable of handling more than three projects at a time.
All the laborers are provided with basic lessons before taking on a project so that the work of every labor is similar and can be replaced. The whole team of laborers is divided into several short teams led by managers and can work on separate projects. I joined the company as a laborer and later was promoted to higher ranks due to my passion and determination to work.
I have been working as an assistant to the manager and take care of all the matters related to the project in the absence of the manager i.e., handling labor, checking the material, managing inventory, and also handling the budget.
I believe I have gained enough experience and knowledge to be promoted to the rank of a manager as I have been an assistant for 3 years. My managers never had any problem with me in any field and I have the ability to lead a team. Recently, the company signed a road construction project with the government, and I would like to lead that project. I have already designed a proposal for the venture and attached it with the letter to seek tour approval.
Introduction
Construction is the art of forming structures or organizations from scratch. In general, it constitutes the process of making buildings, houses, bridges, offices, and others. It typically starts with the planning, design, and financing and continues till the point where it is completed and ready to use.
The process of repair and maintenance also falls under the category of construction. Road construction is the phenomenon of building newer roads on soil or repairing the damages to old roads that may occur due to various reasons i.e., accumulation of rainwater, poor drainage system, low quality of material used for construction, and others. These roads are used for the movement of vehicles and covering distances.
Methods of road construction have evolved a lot since the first method of road construction. Initially, roads were constructed by using timber and stone and mostly for military purposes but later, with the advancement of technology, new techniques were developed to reduce labor work and involve more machinery.
The construction techniques were improved by the study of stone thickness, road traffic, and alignment for developing stones to align in a compact design and cover with smaller stones to produce a solid layer on top. Currently, roads are constructed with asphalt or concrete to produce a sturdy structure.
Types
Various methods of road construction have evolved in recent years and there is a need for employing a method that is durable and cost-effective. Surface material used for road construction depends on various factors i.e., traffic on the road, weather conditions, and weight load.
The need of the hour is to optimize the materials of road construction that are currently being used and replace them with environment-friendly, better performing, and cheap materials.
Five different types of road construction are mentioned below,
- Bituminous road: Bituminous surface treatment is preferred for low-traffic roads and can also be used as a sealing coat on asphalt concrete pavement. These roads require specialized machinery for construction and are mostly found in urban areas.
- White topping roads: White topping is the covering of Portland cement concrete on existing asphalt pavement. Depending on the thickness of the concrete layer and its bonding with asphalt substrate, it can be divided into several types. An overlay is added to restore or enhance the ability of the road to carry more load in high-traffic areas.
- Polymeric Fibre roads: Polyester or polypropylene are normally used as polymeric fibers. There are mostly used because of their no risk of corrosion and Cost-effectiveness.
- Gravel road: For applying gravel, the ground is dug for several feet and is filled with large stones in a compact form. It is followed by successive layers of smaller stones until it gives the form of a hard, compacted, and durable surface.
- Composite pavement road: It is composed of Portland cement concrete subaltern with asphalt. These are not used for new road construction processes but rather to rehabilitate the damaged roads.
Process
Roads are an important part of infrastructural development when we talk about the progress and development of communities as well as the nation. The success of a country is based on the roads it has developed over the years because it eases the commute of people and also foreigners to visit the place. The process of road construction is provided below,
- The surface is prepared for road construction by removing potholes or rust.
- On a clean surface, the base course layer or material is laid down. Its thickness ranges from 100 to 150 millimeters.
- A tack coat of asphalt concrete is applied to the base course layer.
- Premix is prepared in a mixer with a temperature-controlled environment. Bitumen is heated for up to 155-177⁰C and the temperature of the aggregate does not exceed a difference of 14⁰C from the binder.
- This hot mixture is collected by the transporter and carried to the location.
- It is spread in desired thickness at a controlled temperature by a mechanical paver.
- Controlling temperature is essential for compaction mixing resulting in the strength of pavement structure.
- The surface is then rolled over by rollers to get the desired thickness and achieve compaction
- Professionals evaluate the quality by checking aggregate grading, the temperature of aggregate, and the temperature of the paving mixture.
- The finished surface is checked for quality assurance.
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