A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Removal of delaminated concrete and cleaning the rust off the reinforcing bars using high-frequency forced pulsed waterjet
The contractual work described in this paper consisted of refurbishing the ceiling of an underground parking garage using forced pulsed waterjet technique. The task was quite difficult as there were innumerable gas and water pipes, fire sprinklers, communication cables, which needed to be protected against possible damage. The use of pulsed technique resulted in savings of dollars 200/m2 compared to the chipping and sandblasting techniques, which were used earlier. The following conclusions can be drawn from this brief, but intensive project: 1. The pulsed waterjet technique was found to be quite satisfactory, the actual jetting time being of the order of only 14 hours. 2. Dual-orifice rotating nozzle was found to be good for cleaning action, but not for removing large amounts concrete debris. 3. Single orifice non-rotating nozzle was found to be quite effective for removing large amounts of concrete debris, but not as effective for cleaning the rust. 4. The estimated rate of cleaning with the dual-orifice rotating nozzle was nearly equal to 11 m2/hr. 5. The estimated volume removal rate with the single non-rotating nozzle was 0.14 m3/hr. 6. Preliminary comparison with the data published in the literature showed that pulsed waterjet is significantly better for this application. 7. Over the duration of the project the pulsed waterjet machine performed without any major problems.
Removal of delaminated concrete and cleaning the rust off the reinforcing bars using high-frequency forced pulsed waterjet
The contractual work described in this paper consisted of refurbishing the ceiling of an underground parking garage using forced pulsed waterjet technique. The task was quite difficult as there were innumerable gas and water pipes, fire sprinklers, communication cables, which needed to be protected against possible damage. The use of pulsed technique resulted in savings of dollars 200/m2 compared to the chipping and sandblasting techniques, which were used earlier. The following conclusions can be drawn from this brief, but intensive project: 1. The pulsed waterjet technique was found to be quite satisfactory, the actual jetting time being of the order of only 14 hours. 2. Dual-orifice rotating nozzle was found to be good for cleaning action, but not for removing large amounts concrete debris. 3. Single orifice non-rotating nozzle was found to be quite effective for removing large amounts of concrete debris, but not as effective for cleaning the rust. 4. The estimated rate of cleaning with the dual-orifice rotating nozzle was nearly equal to 11 m2/hr. 5. The estimated volume removal rate with the single non-rotating nozzle was 0.14 m3/hr. 6. Preliminary comparison with the data published in the literature showed that pulsed waterjet is significantly better for this application. 7. Over the duration of the project the pulsed waterjet machine performed without any major problems.
Removal of delaminated concrete and cleaning the rust off the reinforcing bars using high-frequency forced pulsed waterjet
Entfernung von delaminiertem Beton und Rostreinigung der Stabbewehrung mit Hilfe von Hochfrequenzimpuls-Druckwasserstrahlen
Yan, W. (author) / Tieu, A. (author) / Ren, B. (author) / Vijay, M.M. (author) / Guruswami, G. (author)
2004
13 Seiten, 12 Bilder, 1 Tabelle, 27 Quellen
Conference paper
Storage medium
English
Removing rust from reinforcing bars
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Method and apparatus for prepping surfaces with a high-frequency forced pulsed waterjet
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Bond of concrete reinforcing bars
| Engineering Index Backfile | 1949
Tests of concrete-reinforcing bars
Engineering Index Backfile | 1949
Bond of concrete reinforcing bars
| Engineering Index Backfile | 1949