PSI - Issue 42

Makashev Kuanysh et al. / Procedia Structural Integrity 42 (2022) 769–776 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

773

5

a

b

Fig 2. Test setup, a) test setup details, b) actual test setup.

Table 3. Presentation of the specimens.

Specimen

Number of specimens

Type of mortar

Cl_150_(Co)M1 Cl_150_(Co)M2 Cl_150_(Co)M3 Cl_150_(Co)M4

3 2 3 3

M1 M2 M3 M4

The test specimens and their parameters presented in Table 3. The naming convention adopted is X_Y, where X corresponds to the textile fibre material (Cl-light carbon) and Y corresponds to the bonded length. The suffix 'co' represent the textile fibre material coated with epoxy resin. The total number of TRM configurations tested was 4. 3. Experimental result The bond-slip response curve of coated carbon is shown in Fig 3 and Fig 4. More detailed results are represented in Table 4. Furthermore, comparison between M1 and M2 are shown in Fig 3. The comparison in terms of four mortars is represented in Error! Reference source not found. . The picture Fig 5 presented the failure mode between different mortar matrices. Textile detachment occurred in the case of M1 mortar. In all specimens strengthened with M1 mortar the failure mode observed was detachment at the matrix-to-matrix interface. When the load was close to the maximum load, the cracks were formed at the edge of the bonded region followed by complete detachment of the textile from the mortar matrix Fig 5a. Textile slippage and partly detachment observed in case of M2 Fig 5b. The failure mode of M3 mortar manifested as slippage and crack initiation on matrix interface textile Fig 5c. Debonding at the matrix-to-substrate was the M4 matrix failure mode Fig 5d.