7A-Slump of Hydraulic-Cement Concrete

7A-Slump of Hydraulic-Cement Concrete - American University...

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American University of Sharjah College of Engineering Department of Civil Engineering Instructor: Arshi Faridi E-mail : [email protected] Course: CVE 202 Experiment #: 7A Slump of Hydraulic-Cement Concrete Purpose: To determine the slump of hydraulic-cement concrete, both in laboratory and in the field, according to ASTM C143-98. Background: This test method is considered applicable to plastic concrete having coarse aggregate up to 37.5 mm in size. Since the long-term properties of hardened concrete: strength, volume stability, and durability are seriously affected by its degree of compaction, it is vital that the workability of the fresh concrete be such that the concrete can be properly compacted. The strict definition of workability is the amount of useful internal work necessary to produce full compaction. Workability of concrete depends on many factors, such as the shape, size, grading and the surface texture of aggregates, water/cement ratio and the air content of concrete . Unfortunately, there is not acceptable test, which will measure directly the workability as defined earlier. However, other tests (Table 1) are used widely to give a measure of workability. One of these
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