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Posts published in “Concrete Workability”

Since the early 20th century, the concrete industry has recognized the need to monitor concrete workability to ensure that concrete can be properly placed and can achieve adequate hardened strength. A myriad of test procedures for determining workability have been developed for research, mix proportioning, and field use. The vast majority of these test methods have never found any use beyond one or two initial studies. With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance. Even with the increase in knowledge of concrete rheology, the slump test remains the predominately used test method for measuring concrete workability.

ViscoCorder

The ViscoCorder is a single-point device used in Germany to measure the consistency of fresh mortar. Banfill (1990) modified the test to measure both the…

Vicat Needle Test

The setting time of concrete, mortar, or paste can be measured as an indication of workability (Ferraris 1999). One of the most common tests is…

Mini-Flow Test

The mini-flow test (Zhor and Bremner 1998) is a variation of the mini-slump test described in the above subsection. The plexiglass sheet used in the…

Mini-Slump Test

The mini-slump test, which was originally developed by Kantro (1980) and later modified by Zhor and Bremner (1998), measures the consistency of cement paste. The…

Turning Tube Viscometer

The turning tube viscometer (Hopkins and Cabrera 1985; Ferraris 1999) is based on the same principle as the moving sphere viscometer—namely, Stoke’s Law—but is only…

Wuerpel Device

The Wuerpel device (Maultzsch 1990) measures the consistency of mortars by applying a shear force to a mortar specimen and measuring deformation energy. The apparatus…

Flow Cone Test

Several versions of a funnel test are used to measure the workability of pastes and grouts. These devices differ in dimensions and intended uses; however,…

Penetration Test for Segregation

The penetration test for segregation (Bartos, Sonebi, and Tamimi 2002; Bui, Akkaya, and Shah 2002) measures the penetration resistance of highly fluid and self-compacting concretes.…