Settlement Column Segregation Test
The settlement column segregation test (Bartos, Sonebi, and Tamimi 2002) measures the degree of segregation that occurs in a concrete […]
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.
Rotational Rheometers
Many attempts have been made to adapt traditional rotational rheometers to measure concrete. Rotational rheometers for concrete apply shear stress
Ring Penetration Test
The ring penetration test (Wong et al. 2000) consists of a steel ring that is allowed to sink under its
Proctor Test
The proctor test used for soils can also be used for lean, dry concrete mixes (Juvas 1994; Bartos, Sonebi, and
Powers and Wiler Plastometer
The recording plastometer (Powers 1968; Wong et al. 2000) developed by Powers and Wiler appears to be the first attempt
Powers Remolding Test
The Powers remolding test (Powers 1968; Scanlon 1994; Wong et al. 2000) is similar to the Vebe consistometer. The test
Penetration Test for Segregation
The penetration test for segregation (Bartos, Sonebi, and Tamimi 2002; Bui, Akkaya, and Shah 2002) measures the penetration resistance of
Multiple Single-Point Tests
Instead of using one single-point test to measure workability, multiple single-point tests can be performed. For instance, ACI 309.1R-93 describes
Moving Sphere Viscometer
The moving sphere viscometer (Powers 1968; Wong et al. 2000) uses the principle of Stokes law to measure the viscosity