Research Article

Mechanical Properties and Strength Grading of Engineered Bamboo Composites in China

Table 3

Summary of experimental results and characteristic values for EBC.

EBC1EBC2EBC3EBC4EBC5EBC6EBC7EBC8EBC9

ρ (g/cm3)1.31 (0.04)1.31 (0.06)1.23 (0.06)0.98 (0.06)1.14 (0.05)0.68 (0.04)0.65 (0.04)0.67 (0.02)0.70 (0.05)
Mcmean (%)5.30 (0.04)5.75 (0.07)7.56 (0.06)7.26 (0.05)9.18 (0.06)8.38 (0.04)7.52 (0.03)7.59 (0.04)7.07 (0.06)

Compression
fc,0,mean (MPa)112.89 (0.08)119.04 (0.08)99.29 (0.04)66.72 (0.11)101.95 (0.06)59.44 (0.07)55.93 (0.09)59.36 (0.08)69.22 (0.06)
fc,90,mean (MPa)46.15 (0.11)51.19 (0.18)47.64 (0.12)27.09 (0.19)35.54 (0.20)15.1 (0.21)16.08 (0.12)15.24 (0.13)16.37 (0.08)
fc,0,k (MPa)97.66102.7391.4953.4490.2451.7946.9450.9461.50
fc,90,k (MPa)46.1551.1947.6418.1335.5415.1016.0815.2416.37
Ec,0,mean (GPa)19.48 (0.08)17.43 (0.10)15.37 (0.05)12.52 (0.10)16.82 (0.10)13.03 (0.07)10.45 (0.09)11.61 (0.08)12.87 (0.06)
Ec,90,mean (GPa)4.04 (0.16)4.53 (0.20)3.88 (0.10)2.77 (0.16)3.44 (0.12)1.87 (0.23)1.87 (0.13)2.19 (0.22)2.01 (0.10)

Tension
ft,0,mean (MPa)141.73 (0.24)130.60 (0.20)133.19 (0.13)99.91 (0.33)125.86 (0.20)127.71 (0.10)124.25 (0.24)103.71 (0.18)117.05 (0.19)
ft,90,mean (MPa)5.2 (0.22)7.29 (0.15)9.38 (0.21)2.52 (0.31)3.14 (0.34)4.30 (0.18)5.03 (0.11)5.45 (0.31)6.79 (0.18)
ft,0,k (MPa)81.1583.86103.5539.8981.0689.8971.3870.0580.38
ft,90,k (MPa)3.155.595.851.171.112.843.922.374.46
Et,0,mean (GPa)19.11 (0.10)16.58 (0.12)14.48 (0.09)14.02 (0.22)16.96 (0.15)13.19 (0.13)12.82 (0.22)9.82 (0.17)11.56 (0.16)
Et,90,mean (GPa)3.22 (0.26)8.98 (0.26)7.09 (0.25)1.06 (0.22)1.44 (0.25)3.7 (0.24)8.43 (0.26)3.74 (0.25)6.51 (0.26)

Shear
fs,0,mean (MPa)19.9 (0.19)16.1 5 (0.24)18.79 (0.16)9.01 (0.29)10.69 (0.26)15.44 (0.17)10.36 (0.28)14.6 (0.17)11.89 (0.20)
fs,90,mean (MPa)26.11 (0.23)40.35 (0.15)34.45 (0.12)20.77 (0.16)32.63 (0.15)18.49 (0.12)21.68 (0.17)17.87 (0.13)12.83 (0.20)
fs,0,k (MPa)12.778.8812.544.055.1910.754.899.698.16
fs,90,k (MPa)15.4429.4827.2814.4423.9214.6315.1713.688.24
Gs,0,mean (GPa)5.13 (0.13)4.22 (0.12)4.45 (0.10)2.17 (0.15)3.80 (0.10)2.62 (0.14)2.35 (0.15)2.95 (0.11)2.58 (0.10)
Gs,90,mean (GPa)5.8 (0.12)5.03 (0.15)4.62 (0.16)2.77 (0.17)4.45 (0.12)2.99 (0.13)2.86 (0.17)3.06 (0.15)2.54 (0.09)

Note. The coefficient of variation is shown in parentheses.