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 […]
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.
Instead of using one single-point test to measure workability, multiple single-point tests can be performed. For instance, ACI 309.1R-93 describes […]
The penetration test for segregation (Bartos, Sonebi, and Tamimi 2002; Bui, Akkaya, and Shah 2002) measures the penetration resistance of
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 »
The ViscoCorder is a single-point device used in Germany to measure the consistency of fresh mortar. Banfill (1990) modified the
The setting time of concrete, mortar, or paste can be measured as an indication of workability (Ferraris 1999). One of
The mini-slump test, which was originally developed by Kantro (1980) and later modified by Zhor and Bremner (1998), measures the
The mini-flow test (Zhor and Bremner 1998) is a variation of the mini-slump test described in the above subsection. The
The turning tube viscometer (Hopkins and Cabrera 1985; Ferraris 1999) is based on the same principle as the moving sphere