How to Mix Concrete by Mixture Machine

If the quantity of concrete is not much enough to do with ready mix and is not less enough to do with hand mixing then mixture machine is used to mixing concrete. It is convenience to use mixture machine for mixing small quantity of concrete. Producing concrete with mixture machine is much faster than hand mixing. Normally the capacity of mixture machine is 4 to 9 cubic feet of concrete. Mixture machine can be bought or rented.
Below are the steps of mixing concrete by machine-
  • Arrange and stake all required tools and materials such as concrete ingredients, bucket, shovel and measuring can before starting the machine.
  • Keep a drum of water near mixture machine.
  • Clean the excessive dust from aggregate with water. Maximum 3% dust by volume is allowable.
  • Measure the coarse aggregates and fine aggregates by a can equivalent to volume of a bag of cement.
  • Make sure the form work which you are going to fill with concrete is properly supported and leakage-proof.
  • Make sure the path between mixture machine and pouring place is easy accessible.
  • Add half of required material (aggregates) of a batch.

Concrete mixture machine

  • Add small amount of water in drum.
  • Then add a bag of cement. It is better to make the batch for a bag.
  • Add remaining aggregates as per required proportion in the drum of mixture machine.
  • Decide what should be your water-cement ratio and measure the water bucket for how many bucket of water will need for a bag of cement. Thoroughly add required quantity of water. You can control water quantity by measuring slump.
  • Mix the concrete ingredients not less than two minutes after all materials are in the drum.
  • Gradually add the remaining water and keep checking if the concrete mix is uniform or not.

Your Turn:
What size of mixture machine do you use?
How many bag/bags of cement do you mix in a batch?
Read More
// // 1 comment

How to plaster on surface

Plaster is a mixture of sand and cement with water. 1:4 or 1:6 ratio of cement-sand is mixed for making plastering mortar. 1:4 cement-sand mortar is used for plastering masonry surface and 1:6 cement-sand mortar is used for RCC surface plastering. The thickness of plaster on surface is ranging from 12mm to 25mm depending on the surface condition.

Purpose of plastering:
Plaster is used for covering the rough surface of RCC and masonry work to obtain a smooth, even, regular, clean and durable surface and with the object of improving the resistance of the surface to rain water penetration and atmospheric influences.

Read More
// // Leave a Comment

Types of Rock

It is very important for an engineer, a contractor and may be an architect to become conversant thoroughly with different types of building materials, their properties and their uses for different purposes. The correct uses of materials result in better structural strength, functional efficiency and esthetic appearance.
Building stones are obtained from rocks occurring in nature.
So, as a part of a series of different types of building materials, their properties and purposes of their uses, today I’m going to share the types of rock.
Read More