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Showing posts with label Construction Demolition. Show all posts
Showing posts with label Construction Demolition. Show all posts

Wednesday, January 30, 2019

Details about low cost housing

Low Cost Housing is gaining popularity in recent times. This type of housing is based on productive budgeting and useful methods which facilitate decreasing the construction cost through the application of locally obtainable materials together with superior skills and technology devoid of comprising the strength, performance and longevity of the structure.

The low cost housing is performed by managing all the resources perfectly. The cost reduction is possible by suspending finishing works or utilizing them in phases.

Building Cost - The building construction cost is segregated as follow:

Building material cost : 65 to 70 %

Labour cost : 65 to 70 %

In low cost housing, building material cost is reduced due to application of the locally obtainable materials. Besides, the labour cost is also decreased by correctly making the time schedule of the work. The cost is decreased with the selection of more efficient material or by a superior design.

The cost can be decreased in the following areas :-

1) Minimize the plinth area with the use of thinner wall concept. As for instance 15 cms thick solid concrete block wall.
2) The locally obtainable material should be employed in a untraditional form like soil cement blocks instead of burnt brick.
3) Apply energy efficient materials so that less energy is consumed, as for instance, concrete block instead of burnt brick.
4) Apply eco-friendly materials in place of traditional building constituents, as for instance R.C.C. Door and window frames instead of wooden frames.
5) Plan in advance each constituent of a house and streamline the design method for minimizing the size of the constituent in the building.

6) By planning every constituent of a house the wastage of materials caused by demolition of the unplanned component of the house is bypassed.
7) Each constituent of the house should be verified whether if it’s necessary, if it is unnecessary, then that constituent should not be applied.


Details about low cost housing

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Published By
Rajib Dey
www.constructioncost.co
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Thursday, January 3, 2019

Different types of rock drilling tools

Drilling alias boring , is easily performed with specialized equipment known as rock drills. The following types of drills are generally found :

a. The hydraulic drills
b. Electric motor drills
c. Pneumatic rock drills


The above types of tools are utilized in different types of projects like soil nailing, micro-pile, mining and tunneling job sites. The hydraulic drills are mostly recognized due to their light weight and capacity to operate on hard rocks devoid of utilizing a large compressor.

Parts of a Rock Drill: All types of rock drills contain a standard design that is basically a combination of exchangeable attachments. A standard rock drill comprises of the following sections:

1. Drill bit: It refers to the tip of the rock drill that initially touches with the ground throughout a boring operation.
2. Drill stem: It stands for the long frame that enters the ground throughout boring whose end houses the drill bit.
3. Drill rod: It belongs to the empty section of the drill stem that attaches the motor of the rig to the drill bit. The drill rod transmits the cutting force to the drill bit to allow the rock drill to enter into the ground.
4. Carbide bits: These belong to special types of drill bits which are found in rotary and percussive drilling containing carbide tungsten coated onto them at an angle.


How Rock Drills Work: All through soil nailing, micropile, mining or tunneling operations, rock drills enter the earth either by rotating or making incessant impact blows.

Rotary drills are activated by cutting and flushing out rock fragments, whereas percussive drilling splits rocks by making impact blows. Some contractors prefer to join both methods which are suitable for operations on medium to hard rocks.

The method of drilling is based on the type of hole a contractor plans to bore into the ground. The two mostly recognized holes are the cored holes and the open holes. Cored holes contain an opening whose diameter is preset beforehand prior to start of an operation. In this case, cored holes need a stem with exterior tubes to rotate the drill bit.

Alternatively, open holes do not contain predetermined diameter. The drill bit enters straight into the ground throughout an operation. The three main types of drill bits generally exist which are used in boring open holes. These range from rock roller bits, wing bits and down-the-hole hammers.

Rock roller bits alias tricone bits, contain teeth-like steel cones. These cones cut and flush rock fragments outsides via the drill rod. Wing bits alias drag bits, are built with carbide tungsten and effective for soft ground surfaces. Air core hammers contain three protruding blades that cut rock throughout an operation and apply compressed air to flush out fragments on the surface.

Different types of rock drilling tools

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Published By
Rajib Dey
www.constructioncost.co
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