Skip to main content

PLACING OF CONCRETE AND ITS MIXING

 There are some skills that are need to be gained by site engineer, contractor and mistry as well as the site supervisor. They must be aware and conquer about the cure of concrete. There are some certain issues which are to be faced during placing of concrete. 

       (a) First of all the reinforcement should be checked whether the nominal cover or clear cover is given or not. Otherwise this will lead to the rusting of reinforcement which will caused due to its atmospheric effect when water or muddy soil will enter into the pores or voids of the concrete. 

      (b) The next typical thing is that the shuttering should be checked whether it is straight or not or according to the drawing is given or not, max. end to end distance is provided or not. Because after pouring the concrete it will not be possible to adjust or remake it. Therefore all things should be checked before placing of concrete. 

      (c) The most important thing is that, the vibrator must be their at the site. Without vibrator the placing of concrete is of no use. It will lead to honeycomb like structures and failure of concrete. Therefore after placing of concrete upto the brim level the vibrator must be used. 

HOW  TO  MIX  THE  CONCRETE

One of the most important thing is that the workers dosen't know how to mix the concrete. They think that they are the most experts in mixing the concrete but can't identify the ratio in what order to mix. For PCC the ratio is 1:3:6 and for RCC the ratio is 1:1.5:3 and above this is also given but the given ratio is for building works or dam works. 

But before doing any concreting work first of all cube test should be done. It should be in the ratio 1:1.5:3. It is placed in the cube mould and after that it is taken in the lab for testing. 


Moreover the further placing of concrete is to be done in a systematic manner or lucent manner. Otherwise there will be faulty in any case of concreting work. Be careful with mistry, contractor and supervisor. They think themselves to be the best because of experience in all this type of works. But the main technical term of this work is dosen't known by them. Neither they know the use of vibrator nor the mixing of aggregates as per w/c ratio. 

Comments

Popular posts from this blog

How to edit grid systems in Etabs

 Okk in the last blog I had discussed about Etabs for beginners. You have got at least some ideas about it. If you have not seen it then click here . But here I am going to discuss how you will edit Grids/Columns in Etabs. As I had said by clicking on "Modify/Show Grid Systems" option a new dialog box appears, their you can edit anything. But you can also do it by different way. On the left side in grid dimensions (plan) you can see that two options are available. One is "Uniform Grid Spacing" and the other is "Custom Grid Spacing". Click on the "Custom Grid Spacing" and you see that Edit Grid Data option is available. Just click on that, and you can edit it as you want by giving the required dimensions in X-axis and Y-axis only. Ok whatever be lets come to the topic. If you have done it like as I have shown earlier then follow those steps. And the one who were new to this blog this is just for that. That's why I underlined with BLUE line an...

MACHINES USED AT CONSTRUCTION SITES

 The most commonly used machine at any construction site is JCB where it's technical name is Backhoe. It is the most common and widely used machine in any construction project whether its big or small project. It becomes easier and makes the work faster for the companies at any time of interval.    All other machines such as Transit Mixer, Concrete Mixer, Roller etc are also used in any kind of road project or building project. Transit Mixer is used for large large building projects, bridge projects, some kind of road projects etc. whereas concrete mixer is for small building projects. Roller is used for road project and bridge project for its elevation.  For any building project the most commonly used machines are concrete mixer, transit mixer, concrete pump, bar bending machine, needle vibrator, water pump and many more. All these machinery works make the work easier and faster. Otherwise if the work is done with labourers it will take more time and less efficient ...

Importing AutoCAD into Revit

So today in this blog I am going to explain how I made an AutoCAD 2D plan and then imported it into Revit software. So you read this blog from starting to end, then only you'll understand clearly.  This is all basic and not any crisscross idea or ruthless situation. It's very simple. First you do all the basic steps in AutoCAD, and you know what is that. Going to Format, set up the units and bla, bla, bla. After that making all these set-up you start with the drawing plan. You yourself have created a idea "how my drawing plan will look like" or "how will I make it?" But before going into complex, first you make a simple drawing plan, like this    First you make the lines and after that create the room size and area of your own. You are exclusively expert in that. This is the first and foremost drawing plan you have to make. And the rest you know how to make it. All boundary lines, room shape and size, passage, staircase etc. you know it very well.  Now you g...