Slump Test

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. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction.

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 point of the specimen being tested.

Lightweight Concrete Blocks

Concrete Blocks especially the lightweight concrete blocks are high in demand. These are used to build homes and buildings. The business can be started at homes as it doesn’t need a person to take training from somewhere. It also doesn’t need a lot of money to start.

Lightweight concrete weights are 10-40 % less than the ordinary concretes available. The reason behind its huge demand for homes is it helps to keep the house warm and dry. In the past years two ideas were developed to manufacture light weight concrete blocks. These are aerated autoclave concrete and cellular lightweight concrete. Both have a common purpose which is adding air bubbles to mortar that would automatically lower its weight at the same time improves the quality of the product.

These blocks have excellent audio performance; can be used as effective sound barriers and to get other acoustic solutions. These are perfect for floor screens/roofing, dividing walls, and panel material in auditoriums. You can bring a concrete block machine at home. This machine is very affordable and requires nothing but a proper maintenance. The blocks manufactured from this machine are moisture resistant, strong, whether proof and fire proof.

Different shapes and sizes can also be made with the availability of different molds available with it. One of the advantageous part of Lightweight Concrete Block produced is it don’t require plaster and water resistant paint suffices. Today, there are ample of concrete machine manufacturers providing the machine at affordable prices. You just need to check and compare the specifications carefully. The specifications needs a great attention to ensure that the machine you are purchasing is according to your requirements and will bring the desirable results. So Computer Technology Articles

, don’t think too much. Just make a deep research on the internet about lightweight blocks and get benefited.

Source: ArticlesFactory

HowTo Grouting PVC pipe

Grouting pipe

1. Materials

Sika Grout, Cement and water.

2. How to use

Cutting concrete hole bigger than PVC pipe 60mm (Ex: If PVC pipe diameter 80mm, cut concrete hole to 140mm)
Install formwork below slab to hold.
Cleaning the hole by using cement mix water to clean it and then filling Sika Grout 214-11 surrounding PVC pipe.