玄武岩织物和钢纤维复合增强碱激发矿渣板受高温作用后的性能研究

来源 :第二届中国国际复合材料科技大会 (CCCM-2) | 被引量 : 0次 | 上传用户:hwcf
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  织物和短切纤维复合增强是一种高效、新颖的增强技术,能大幅提升基体的弯曲性能和韧性。本文研究了不同温度和保温时间对玄武岩织物和钢纤维复合增强碱激发矿渣板受高温作用后力学性能与微结构的影响。研究表明其弯曲性能和质量损失在高温作用后大幅下降,尤其经过800℃的高温作用后,试件的初裂弯曲强度和极限弯曲强度仅为对照组的10%-19%。随着保温时间的延长,板的弯曲强度和韧性下降较快。通过对基体X射线衍射、扫描电镜和能谱的测试分析,进一步研究了其经过高温作用后的物相变化和微结构损伤。微结构测试结果表明碱激发矿渣砂浆基体的劣化是玄武岩织物和钢纤维复合增强碱激发矿渣砂浆板经过高温作用后弯曲性能降低的主要原因。
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