PSI - Issue 71

Dharmadas Bairagi et al. / Procedia Structural Integrity 71 (2025) 417–423

422

Modulus of Rupture in N/mm²

Breaking Strength

0 0.2 0.4 0.6 0.8 1

100 150 200 250

N/mm²

0 50

(N/mm²)

22 26 30 34 38

22 26 30 34 38

Bamboo Waste %

Bamboo Waste % BBC BBCST BBM

BBC BBCST BBM

Figure 5: MOR values for compositions

Figure 6: Breaking strength values for compositions

Thermal conductivity co-efficient (k) decrease as bamboo percentage in the matrix increases (fig 7). The lowest value of k was obtained at 38% bamboo fines composition for BBC and BBM both. However, all samples exhibit the thermal conductivity in the range suggested by SP41:1984.

Thermal Conductivity

0.070 0.080 0.090 0.100 0.110 0.120 0.130 0.140

0.129

0.117

0.113 0.110

0.105

0.101 0.104 0.103

0.094

(W/mk)

0.086

22

26

30

34

38

Bamboo Fine %

BBC BBM

Figure 7: Thermal Conductivity values for compositions

Water absorption was assessed to check the dimensional stability of bio-panels. R. D. Toledo Filho,et al. (2019) showed the initial sorptivity of bio-concrete containing bamboo chips is 0.463 g/cm².h0.5 which equal to 0.000077 g/mm²s0.5. Test result of panels indicates sorptivity value of S38, S30, S26 as 0.063 ,0.068 and 0.069g/mm²s0.5which are to higher side. Water absorption for 6-hour immersion was calculated as 53% for S26, 56% for S30 and 57% for S38. 4. Conclusion Insulating roofing panels are used to enhance the thermal efficiency of roof and improve energy conservation in buildings. In this study the panel developed with 26% and 30% bamboo fines achieved flexural breaking strength