Strengthening strips

Commercially available pultruded strips for strengthening existing stmctures consist of carbon or glass fibres, embedded in an epoxy or vinylester resin matrix. Most civil engineering applications make use of strengthening strips made of unidirectional carbon fibres in an epoxy matrix - CFRP strips (Fig. 

Table 9.5 Typical physical and mechanical properties of CFRP strengthening strips...

Demonstrations (a) Atomix (to show grain boundaries), (b) Model of dispersion strengthening. Take piece of PMMA sheet == 2.5 mm thick and = 7 cm square. Glue four PMMA strips of section =7X7 mm on top of the sheet to form a tray = 7 mm deep. Cut six = 7-mm lengths of an = 6-mm-diameter PMMA rod. Glue the ends of these to... 

Moreover, the presumptive evidence for malonaldehyde participation is strengthened by the fact that a polyamide strip... 

Two other filtration modules, which both formed part of automated radioimmunoassay systems, have been developed. - One of these, was based on conventional continuous flow techniques. At the filtration stage, a continuously moving strip of glass fiber filter paper was strengthened and wetted, the reaction mixture was filtered, and the precipitate was washed by two streams of buffer. The strip was dried and overlaid with cellulose adhesive tape before being counted as it passed between two end-window radioactivity detectors and wound onto a take-up spool. In the second system, glass fiber filter disks are mounted at intervals over perforated segments of a flexible plastic carrier tape. The contents of five... 

Polyolefine films are the most applicable, in which the high-density polymer layers fulfil the strengthening and barrier functions and a layer of low-density polyolefine contains a Cl [19,28,30]. For instance, in a strengthened multilayer Cortec VCI-126 film the outer layer is formed of LDPE with HOPE strips. The inner inhibited layer is made of LDPE. 

Externally bonded flexural reinforcement (EBFR) for the strengthening of concrete members using unstressed fibre reinforced polymer (FRP) strips... 

---