Test Methods for Very Low Slump Concrete
Very low slump concretes are typically too stiff to be measured with test methods that consider the ability of 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.
System and Method for Controlling Concrete Production
A system to monitor and control the quality of concrete throughout production based on rheological properties was recently developed and
System and Method for Controlling Concrete Production Read Post »
Tattersall Two-Point Workability Device
The Tattersall two-point device (Tattersall and Bloomer 1979; Cabrera and Hopkins 1984; Tattersall 1990; Tattersall 1991; Ferraris and Brower 2001;
Surface Settlement Test
The surface settlement test (Bartos, Sonebi, and Tamimi 2002) is used to assess the stability of concrete by measuring the
Soil Triaxial Test
The soil triaxial test (Ritchie 1962; Powers 1968) can be used to measure the resistance of concrete to shear stress.
Soil Direct Shear Test
The direct shear test used for soil (Powers 1968) can be performed with fresh concrete to assess the cohesive strength
Slump Flow Test
The simplest and most widely used test method for self-compacting concrete is the slump flow test (Kuroiwa et al. 1993;
Slump Test
The slump test is the most well-known and widely used test method to characterize the workability of fresh concrete. The
SLump Rate Machine (SLRM)
Like the modified slump test, the SLump Rate Machine (SLRM) introduces the variable of time to the standard slump test