Slump Test

‫ﻣﺆﻣﻦ ﺗﻮﻓﻴﻖ اﺣﻤﺪ اﻟﻌﺘﻮم‬

‫1‬

‫‪ATOOMUS‬‬

Workability: Workability:

Workability of concrete generally implies the ease with which mix can be handled from the mixer to its finally compacted shape. the measurements of the workability Of fresh concrete is of importance in assisting the practicability of compacting the mix and also in maintaining consistency throughout the job. In addition , workability testes are often used as an indirect check on the water content and therefore on the water/cement ratio of concrete. Workability should be distinguished from consistency which term as used in concrete practice, relates to the degree of wetness of concrete. On the other hand, consistency has to do with the force flow relationship alone. A job starts with the mix just right cement and aggregate are measured, the right amount of water is add, and mixing is then carried out for the given time. A batch of concrete wetter than the rest will mean the batch of concrete that is weaker and less durable in the finished job . a job batch that is too dry will lead to difficulties in placing, compacting and finishing .

‫ﻣﺆﻣﻦ ﺗﻮﻓﻴﻖ اﺣﻤﺪ اﻟﻌﺘﻮم‬ 2 ATOOMUS

There are five tests widely used for the determination of the fresh concrete workability : 1. Slump test. 2. Compacting factor test. 3. Vebe consistometer test. 4. Flow test.

Slump test Slump test

Objective:

To calculate the slump value, and to know more about the workability, and fresh concrete .

Introduction:

The slump test is used vary often In concrete work. It is easily performed at a job site and is useful in detecting variations in mixes of given properties. The slump test cone is placed on a smooth , level surface with the smaller opening at the top. It is filled in three layers of equal volume , each of , which is compacted 25 times with a standard rod having a hemispherical tip . the rod is then struck off, and the cone is slowly lifted and set beside the unsupported concrete.

‫ﻣﺆﻣﻦ ﺗﻮﻓﻴﻖ اﺣﻤﺪ اﻟﻌﺘﻮم‬ 3 ATOOMUS

The...