In the first pouring of concrete on a project a Quality Engineer and a consultant representative should be present to supervise or to check the concrete delivered on site.

The following Standards are also referred to in this guide: AS 1012 Methods of testing concrete AS 2758.1 Aggregate and rock for engineering purposes Part 1 Concrete aggregate. Slump is a measure of concrete consistency or fluidity.

Best Practices Guidelines for Concrete Construction The Best Practices Guidelines for Concrete Construction has been developed by the Ontario General Contractors Association (OGCA) and the Ready Mixed Concrete Association of Ontario (RMCAO) with the assistance of industry stakeholders.

Workability: The concrete mix workability is the property that determines the mix capacity to be placed and consolidate properly, allowing to finish a product without segregation.

Concrete Slump Test.

Figure-3: Types of Concrete Slump Test Results.

It is also critical in measuring the workability of the concrete and lets you know the composition of the mix.

About Concrete: Guides & Advice.

These are: True slump: In a true slump concrete just subsides shortly and more or less maintain the mould shape.

Long delivery, waiting, and unloading times, for example, can decrease slump. One of the critical tests to analyze the quality of concrete is the “Concrete Slump Test”. The concrete slump test is an on-the-spot test to determine the consistency as well as workability of fresh concrete.
This test is conducted to establish the consistency of fresh concrete and to find out its flow.

The concrete slump can be classified according to the nature of concrete fall. This characteristic is measured in terms of slump, the higher slump values, the more manageable, and greater mobility will be obtained.

This type of slump is most desirable. Four-inch (4”) slump is very common with normal weight concrete and is a good average slump for pumping.

Testing For Concrete Slump. Concrete doesn't have to dry out to harden, which is why you can pour concrete structure underwater.

Several methods and techniques are available, the choice depending mainly on the workability of the mixture, placing conditions, and degree of air removal desired. The test is carried out in accordance with BS EN 12350-2, Testing fresh concrete. Looking for some guidance or advice about readymix concrete (pre-mixed concrete)?

The measurement is taken between the top of the cone and the top of the concrete after the cone has been removed as shown in figure-1. Consistency: This property determines the mobility and slump of the concrete mix. Types of Concrete Slump. Find Out More.

Concrete Workability Guide. Slump test. Guide for Consolidation of Concrete Reported by ACI Committee 309 ACI 309R-05 Consolidation is the process of removing entrapped air from freshly placed concrete.


Slump adjustment is a fact of life for concrete contractors, but they should follow these guidelines for its use Variations in slump between trucks can be the result of many factors.


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