Biochar-containing cement composites have attracted increasing interest in recent years due to the possibility of reducing the environmental impact linked to cement. They can also improve the mechanical properties and the electrical conductivity of cement-based materials. One parameter that can affect the mechanical performance of biochar-containing cement composites is the morphology of the biochar. While it is reasonable to expect a different behaviour for different shapes (sheet-, sphere- or rod-shaped), a full understanding is yet to be achieved of the competing effects of aspect ratio, morphology and composition linked to the specific biochar source. This study shows that biochar can improve the mechanical properties of cement-based composites: 1 wt% of biochar improves compressive strength and flexural strength by 7% and 15%, respectively. The results presented in this study confirm that biochar has a positive effect on both the mechanical and environmental behaviour of cement-based materials.

中文翻译：

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生物炭形状对水泥基材料的影响

近年来，由于可以减少与水泥相关的环境影响，含生物炭的水泥复合材料引起了越来越多的关注。它们还可以改善水泥基材料的机械性能和导电性。可以影响含生物炭的水泥复合材料的力学性能的一个参数是生物炭的形态。虽然预期不同形状（片状、球状或棒状）的不同行为是合理的，但对于与特定生物炭来源相关的纵横比、形态和组成的竞争效应仍有待全面了解。该研究表明，生物炭可以改善水泥基复合材料的力学性能：1 wt% 的生物炭可将抗压强度和抗弯强度分别提高 7% 和 15%。