Title: Techniques to Improve Strength of Polymer Concrete Made with Wet Aggregate
Author(s): D. W. Fowler, A. H. Meyer,
and D. R. Paul
Publication: Symposium Paper
Appears on pages(s): 107-122
Keywords: aggregates; bonding; chemical compounds; coatings;
compressive strength; fibers; methyl methacrylate; moisture con-tent;
polymer concrete; repairs; water content.
Potential solutions for improving the strength of poly-mer concrete made with wet aggregate have been investigated in re-search performed for the U.S. Air Force to develop rapid repair methods. Chemical additives, aggregate treatment, and addition of fibers have been evaluated." Moisture contents used in the re-search ranged up to 7 percent, with the maximum values usually 4 to 5 percent. No chemical additives for monomer were identified which provide significant strength increases. Aggregate treatments con-sisted of coated aggregate and moisture absorptive additives for wet aggregate. Aggregates coated with a silane coupling agent pro-vided very good strength even when the moisture content was in ex-cess of 4 percent. Several types of fibers were investigated; hooked steel fibers were found to provide the greatest strength. It was found that the addition of approximately 5 weight percent steel fibers provided good strength increases and ductility.