PSI - Issue 42

771 3

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

Nomenclature HPC

high-performance concrete HPFRC high-performance fibre reinforced concrete TRM textile reinforce mortar

2. Experimental program 2.1. Test specimens and experimental setup In-house coated carbon textile fibre was used in this research; the corresponding mesh sizes are shown in Error! Reference source not found. . The property of dry carbon textile represented in Table 1

Fig 1. Mesh size of textile.

Table 1. Property of the carbon textile.

Material

Weight [g/m 2 ]

Nominal thicknesses [mm]

Tensile Strength [MPa]

Young’s Modulus [GPa]

Axial Stiffness [N/mm]

Carbon

220

0.062

4800

225

13.95

Single lap quasi-static test was conducted, using a single lap shear experimental setup (Fig 2. Test setup, a) test setup details, b) actual test setup.

) The investigated parameter was the mortar matrix with constant bond length of 150mm. The specimens were masonry wallets comprising five clay bricks with individual dimensions of 215 x 102.5 x 65 mm. The joint thickness was 10mm in all cases. The total height of the prism was 365 mm. The bonded area had a width equal to 120mm. The bonded area was positioned at a 25 mm distance from the wallet edges to prevent any undesirable edge effects. The thickness of the TRM layer was approximately 6 mm. A 1:4 cement to sand ratio mortar was used for the joint mortar mix. The amount of water was defined by trial mixes until the desired workability was achieved and was equal to 0.25 Table 2. Four strengthening mortars was used in this study namely M1, M2, M3 and M4. The M1 and M2 mortars represent the same ready-mix mortar with different water/mortar ratios of 0.23 and 0.18 respectively. Whereas M3 and M4 are two types of high-performance in-house made cementation matrices. The main differences of the matrix are of 1% basalt fibres presence. A mix of basalt fibres is used to increase the flexural property of the mortar. The property of both mortar joints and the