Optimal regime in slip form concreting

Rising Experiment of Slip Form System Using Surface Wave Velocity

“…(b) present the relation between the surface wave velocity and the compressive strength for MIX 1 and MIX 2. The surface wave velocity corresponding to the stripping strength (larger than 0.2 MPa) suggested by Reichverger and Jaegermann [1] is seen to range between about 600 m/s and 1300 m/s. Accordingly, it can be stated that the slip form system shall be risen with respect to the surface wave velocities of Fig.…”

“…Through a more systematic study, Reichverger and Jaegermann [1] suggested appropriate removal strengths of the slip form by means of various tests under the assumptions that "the concrete placed in the form must be sufficiently fresh for easy shifting of the form, the concrete exposed outside the form must have sufficient strength to resist the pressure of the overlying concrete without any damage, and the surface of the casting must be amenable to floating after stripping considering the construction quality." Based upon experimental results, these authors reported that, for stripping at strength of about 0.2 to 0.3 MPa, concrete experienced small deformation, developed 100% of its strength at 28 days, and offered easy surface Rising Experiment of Slip Form System Using Surface Wave Velocity…”

“…The extent of bonding and the capacity of concrete to develop sufficient strength in a long-term can be evaluated by compressive strength test [1]. Following, this study performs concurrently surface wave measurement test, penetration resistance test [2], and compressive strength test [3] so as to identify the relationship between the surface wave velocity, the initial setting time and the compressive strength of concrete.…”

A Study on the Quality Control of Concrete during the Slip Form Erection of Pylon

“…In terms of the strength, concrete should also secure a compressive strength of minimum 0.2 MPa as reported by Reichverger and Jaegermann (1980). Accordingly, this study sets the compressive strength of 0.2 MPa as criterion for the slip-up of the slip form so that concrete can secure self-supporting capacity and long-term strength when exposed by the lifting of the slip form.…”

“…The eventual self-supporting capacity of concrete can be evaluated by measuring the early setting time corresponding to a penetration resistance of 3.5 MPa when conducting penetration resistance test according to the rule specified by KS F 2436 [9]. Besides, in terms of the strength, Reichverger and Jaegermann (1980) reported from their experimental results that, when stripping was done with a concrete strength of approximately 0.2 -0.3 MPa, concrete developed 100% of its strength at 28 days with small deformations and that surface treatment could be conducted easily to manage the construction quality [10]. However, the application of such criteria for the removal strength requires knowledge of the compressive strength data for all concretes placed continuously.…”