Materials selection for concrete overlays : the final report Page: 22
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Figure 2.8. Cleaning the surface with hydro cleaning equipment
If trucks or equipment need to drive on top of prepared the surface, tarps should be
placed to prevent any foreign materials falling on the surface [28]. The ultimate goal in surface
preparation is to achieve a well textured and clean surface to receive the concrete overlay.
2.5.4 Fiber Incorporation
For mixing purpose, both steel and synthetic fibers can be packaged in water-soluble bags
designed to break down in the mixer and allow the fibers to be evenly dispersed in the mixture
[24]. If not handled properly, remnants of the paper wrapper used to bundle the polyolefin fibers
may appear in the mixture. To avoid producing fiber balls and uncoated fibers, fibers can be
introduced into the mixture sooner; however, the mixing time should be slightly increased and
the batch size should be reduced. These procedures may help, but do not completely eliminate
the problem [24]. Figure 2.9 shows that blowing fiber into the mixing process to disperse fiber
evenly in the mixture.Figure 2.9. Blowing the fiber into the mixing truck
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Kim, Dong H.; Fowler, David W.; Ferron, Raissa P.; Trevino, Manuel M. & Whitney, David P. Materials selection for concrete overlays : the final report, report, July 2012; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth303706/m1/42/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.