The effects of metakaolin (MK) and basalt fiber (BF) on the performance of gypsum-based composites were investigated. BFs 6 and 12 mm long were used in concentrations of up to 0.8 wt.%. Mechanical tests were conducted on both dry and water-saturated specimens. It was found that their flexural and compressive strengths increased with content of BFs to 0.6%. However, the mechanical and durability properties worsened with fiber addition up to 0.8%. The samples with the 6-mm-long BFs showed better properties than those with the 12-mm-long ones. The addition of MK improved the shrinkage behavior of the composites, which could hinder an early formation of cracks in them.

中文翻译：

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偏高岭土和硅砂制备的玄武岩纤维增强石膏基复合材料的材料特性

研究了偏高岭土（MK）和玄武岩纤维（BF）对石膏基复合材料性能的影响。6 和 12 毫米长的高炉以高达 0.8 重量％的浓度使用。机械测试在干燥和水饱和的试样上进行。发现它们的弯曲和压缩强度随着BFs含量增加到0.6%而增加。然而，当纤维添加量高达 0.8% 时，机械和耐久性性能变差。具有 6 毫米长 BF 的样品比具有 12 毫米长的样品表现出更好的性能。MK 的添加改善了复合材料的收缩行为，这可能会阻碍其早期形成裂纹。