Comparison of continuous and pulsing water jets for repair actions on road and bridge concrete

0376644 - ÚGN 2013 RIV LT eng J - Journal Article
Hlaváč, L. M. - Bodnárová, L. - Janurová, E. - Sitek, Libor
Comparison of continuous and pulsing water jets for repair actions on road and bridge concrete.
Baltic Journal of Road and Bridge Engineering. Roč. 7, č. 1 (2012), s. 53-59. ISSN 1822-427X. E-ISSN 1822-4288
R&D Projects: GA ČR(CZ) GA103/07/1662
Institutional research plan: CEZ:AV0Z30860518
Keywords : high-speed water jet technology * pulsating jet * rotating jets
Subject RIV: JQ - Machines ; Tools
Impact factor: 1.478, year: 2012
http://www.bjrbe.vgtu.lt/volumes/en/volume7/number1/08.php

Concrete samples with various erosion states simulating road or bridge damage were disintegrated by pure continuous water jets generated from pressure 380 MPa and by pulsating water jets generated from low pressure 30 MPa. The erosion states of samples were prepared applying several laboratory techniques simulating the concrete aging under the conditions corresponding to the use in practice. The influence of the erosion state on the disintegration rate was tested because water jet techniques are very effective in selective disintegration of damaged concrete without significant erosion of the unbroken concrete unlike pneumatic drills or other impacting machines usually used for such work. The comparison of both the depth of penetration and the ratio of volume disintegration regarding the input power is performed. All results are discussed regarding their application and further development of special routings.
Permanent Link: http://hdl.handle.net/11104/0208994