Kesikidou Fotini, Matamadiotou Ioanna, Stefanidou Maria
Laboratory of Building Materials, Aristotle University of Thessaloniki, 54635 Thessaloniki, Greece.
Materials (Basel). 2024 Sep 11;17(18):4461. doi: 10.3390/ma17184461.
Lime mortars are considered the most compatible material for monuments and historic buildings, and they are widely used in restoration works. A key factor determining the mechanical and physical properties of lime mortars is carbonation, which provides strength and hardness. This paper indicates the properties gained in lime mortars produced by Ca(OH) and CaO reinforced with different bio-fibers (hemp and lavender) when exposed to the natural environment and in accelerated carbonation. At 90 and 180 days of manufacture, the mechanical and physical properties of the produced composites have been tested. The results show that the carbonation reaction works faster in the case of hot lime mortars, increasing their compressive strength by up to 3.5 times. Hemp-reinforced mortars led to an enhancement in strength by up to 30%, highlighting the significance of bio-fibers in facilitating CO diffusion. This was also verified by the thermogravimetric analysis and the determination of the carbon content of the samples. Optimal mechanical properties were observed in mixtures containing quicklime and hemp fibers when conditioned with 3% CO at the tested ages.
石灰砂浆被认为是用于古迹和历史建筑的最兼容材料，并且它们广泛应用于修复工程。决定石灰砂浆机械和物理性能的一个关键因素是碳化作用，它能提供强度和硬度。本文指出了由Ca(OH)和CaO并用不同生物纤维（大麻和薰衣草）增强制成的石灰砂浆在暴露于自然环境和加速碳化时所获得的性能。在制造后的90天和180天，对所生产复合材料的机械和物理性能进行了测试。结果表明，对于热石灰砂浆，碳化反应进行得更快，其抗压强度提高了高达3.5倍。大麻增强砂浆使强度提高了高达30%，突出了生物纤维在促进CO扩散方面的重要性。热重分析和样品碳含量的测定也证实了这一点。在测试龄期用3% CO进行养护时，在含有生石灰和大麻纤维的混合物中观察到了最佳机械性能。
