Skip to main content

Basic knowledge for CivilEngineering to know before entering into job



Follow this for more:

1.Common misconception is that all civil engineers will be site engineers which is wrong. There will be civil engineers in the following functions too.


  • Planning
  • Contracts  
  • Quantity survey
  • Tendering and bidding
  • Design
  • Quality Control,


2. When it comes to site execution,

Every civil engineer must know that the supervisors working under them are not their slaves.

We earn respect only when we show some respect to our juniors level engineers or supervisors.

When safety department in-charge says something, civil engineers need to follow to avoid any unwanted circumstances (like accidents or death in the site).

Don't waste the scrap. Recycle it and reuse it.

Ex: You can even use unwanted cut steel bars for barricading purpose.

3. When it comes to project execution,

Every civil engineer's ultimate aim should be completing the project within the stipulated time without any delay and within the specified budget

  • Minimum thickness of slab is 125 mm.
  • Water absorption should not be more than 15 %.
  • Dimension tolerance for cubes + – 2 mm.
  • Compressive strength of Bricks is 3.5 N /mm2
  • Maximum Free fall of concrete allowed is 1.50 m.
  • In soil filling as per IS code for every 100 sqm 3 sample for core cutting test should be taken.
  • Electrical conduits shall not run in column
  • Earth work excavation for basement above 3 m should be stepped form.
  • Any back filling shall be compacted 95% of dry density at the optimum moisture content and in layers not more than 200mm for filling above structure and 300 mm for no structure
  • A set of cube tests shall be carried out for each 30 cum of concrete / each levels of casting / each batch of cement.
  • Water cement ratio for different grades of concrete shall not exceed 0.45 for M20 and above and 0.50 For M10 / M15 contractor
  • For concrete grades M20 and above approved admixture shall be used as per mix design requirements.
  • Cement shall be stored in dry places on a raised platform about 200mm above floor level and 300mm away from walls. Bags to be stacked not more than 10 bags high in such a manner that it is adequately protected from moisture and contamination.
  • Samples from fresh concrete shall be taken and at least a set of 6 cubes of 150mm shall be prepared and cured. 3 Cubes each at 7 days and 28 days shall be tested for compressive strength. The test results should be submitted to engineer for approval. If results are unsatisfactory necessary action/rectification/remedial measures has to be exercised.


Water used for both mixing and curing shall be clean and free from injurious amounts of oils, acids, alkalies, salts, sugar and organic materials or other substances that may be deleterious to concrete or steel. The ph shall be generally between 6 and 8.
Cement shall be tested for its setting.

1. The initial setting time shall not be less than 30 minutes.
2. The final setting time shall not be more than 10 hours.

  • Slump IS 456 
  • Lightly reinforced 25 – 75 mm
  • Heavily reinforced 75 – 100 mm
  • Trench fill (insitu & Tremie) 100 – 150 mm (For Tremie no need of vibrator)
  • Curing Days Required 
  • Super Sulphate cement : 7 days
  • Ordinary Portland cement OPC : 10 days
  • Minerals and Admixture added cement : 14 days

There are many other things but I felt these are most important.
Labels:

Comments

Post a Comment

Popular posts from this blog

Hardy slab and where it use

  HARDY SLAB :- These kind of slabs are generally seen in Dubai and China. This  slab is constructed by hardy Bricks. Hardy bricks are hollow bricks and made up of concrete Hollow blocks are used to fill portions of the slab thickness it saves the  amount of concrete and hence the own weight of the slab is reduced. This kind of slab has a more thickness when compared with the conventional one. The thickness of hardy slab is 0.27m. The method of installing Hardy slab is different from normal  and it is clearly explained below: This is a one of the types of concrete slabs. The dimensions of Hardy brick is 40cm x 20cm x 20cm The process of execution is as follows: Step 1   : Formwork is arranged and then shutters are fixed on the formwork. Step 2  : Hardy blocks are placed on the shutter with one brick gap on the entire shutter. Step 3  : The gaps between the bricks are called as rib. Reinforcement is provided in a form of beam within the gap. Step 4  : After placing the
4 comments
Read more

About Dome,Pitch roof,Arches slab

Dome Slab:- These kind of slab is generally constructed in temples, Mosques, palaces etc. And Dome slab is built on conventional slab. Thickness of Dome slab is 0.15m. Domes are in semi circle and shuttering is done on conventional slab in dome shape and concrete is filled in shuttering forming dome shapes. This is a one of the types of concrete slabs. PITCH ROOF SLAB: Pitch roof is an inclined slab , generally constructed on resorts for a natural look. Compared to traditional roofing materials Tile-sheets used in pitch roof slab  are extreamely lightweight. This weight saving reduces the timber or steel structural requirements resulting in significant cost savings.Tile-sheets are tailor made for each project offering labour cost savings and reduced site wastage. And the thickness of slab is depends on the tiles we using it may be 2″-8″. This is a one of the types of concrete slabs. Advantages : 1. It sheds off rain water better. 2. It gives you internal storage or ro
Post a Comment
Read more

About slump cone test in concrete

Concrete Slump Test for Workability -Procedure and Results. Concrete slump test is to determine the workability or consistency of concrete mix prepared at the laboratory or the construction site during the progress of the work. Procedure for Concrete Slump Test: Clean the internal surface of the mould and apply oil. Place the mould on a smooth horizontal non- porous base plate. Fill the mould with the prepared concrete mix in 4 approximately equal layers. Tamp each layer with 25 strokes of the rounded end of the tamping rod in a uniform manner over the cross section of the mould. For the subsequent layers, the tamping should penetrate into the underlying layer. Remove the excess concrete and level the surface with a trowel. Clean away the mortar or water leaked out between the mould and the base plate. Raise the mould from the concrete immediately and slowly in vertical direction. Measure the slump as the difference between the height of the mould and that of height poin
1 comment
Read more