Ha, S K; Jang, J G; Park, S H and Lee, H K (2015) Advanced spray multiple layup process for quality control of sprayed FRP composites used to retrofit concrete structures. Journal of Construction Engineering and Management, 141(1): 04014060, ISSN 0733-9364
Abstract
Thus far, the typical spray layup process for fabricating sprayed fiber-reinforced polymer (FRP) composites has entirely depended on the know-how and experience of skilled operators in the marine and commercial composite industry. However, there are some limitations on quality control of these retrofit materials by a typical spray layup process, which are as follows: a limited range of fiber loadings in volume and partial defects by the inconsistent thickness of the layer. To overcome these limitations, this study proposes an advanced spray multiple layup process based on a modified gun-calibration technique in conjunction with spray technical skills proposed by the American Composites Manufactures Association. In detail, practical spray skills were adopted to maintain a consistent thickness of the retrofit materials. An advanced gun-calibration technique was suggested to control the various volume fractions of the fibers. Then, following the proposed spray multiple layup process, sprayed FRP laminates were fabricated. Finally, quantitative tests measuring the thickness, volume fraction of the fibers, and mechanical properties of the final laminates were conducted to assess the feasibility of the proposed process as a quality-control method for retrofit materials.
| Item Type: | Article |
|---|---|
| Index terms: | quality control, thickness, control method, mechanical property, composite, concrete structure, loading, technical skill |
| Subjects: | construction operations, material properties and characteristics, professional development, project delivery, materials science, structural engineering, monitoring and control |
| Topics: | Site Management, Business Strategy, Engineering Principles, Quality Management, Construction Materials, Information Management |
| Descriptive scope: | 2 PC |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here