高级检索
闫旭,周梦辉,张丽,等. 聚丙烯纤维加筋增强钢渣混合土性能的研究[J]. 安徽工业大学学报(自然科学版),xxxx,x(x):x-xx. doi: 10.12415/j.issn.1671-7872.23177
引用本文: 闫旭,周梦辉,张丽,等. 聚丙烯纤维加筋增强钢渣混合土性能的研究[J]. 安徽工业大学学报(自然科学版),xxxx,x(x):x-xx. doi: 10.12415/j.issn.1671-7872.23177
YAN Xu, ZHOU Menghui, ZHANG Li, HUANG Wei. A Study of the Performance of Polypropylene Fiber Reinforced Steel Slag Mixed Soil[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.23177
Citation: YAN Xu, ZHOU Menghui, ZHANG Li, HUANG Wei. A Study of the Performance of Polypropylene Fiber Reinforced Steel Slag Mixed Soil[J]. Journal of Anhui University of Technology(Natural Science). DOI: 10.12415/j.issn.1671-7872.23177

聚丙烯纤维加筋增强钢渣混合土性能的研究

A Study of the Performance of Polypropylene Fiber Reinforced Steel Slag Mixed Soil

  • 摘要: 为进一步改善钢渣混合土的综合性能,在钢渣混合土中掺入韧性良好的聚丙烯纤维,制备纤维加筋钢渣混合土,研究纤维长度、掺量对钢渣混合土无侧限抗压强度、干缩、抗冻等性能的影响,并采用扫描电镜表征分析加筋对受冻试件微观形貌的影响。结果表明:纤维加筋能有效改善钢渣混合土的抗压、干缩及抗冻性能,加筋纤维长度12 mm、掺量0.25%时综合性能相对最优。加筋试件延性变好,抗压强度提升可达16.74%;失水量有所增大,但干缩系数减小可达37.51%;受冻后质量损失率下降、残余强度比提升可达6.33%,其微观形貌相对完整,故表现出更好的抗干缩和抗冻性能。聚丙烯纤维与基体间有效黏结提供的界面摩擦力及其在基体内形成的立体网状结构是钢渣混合土性能增强的重要基础。

     

    Abstract: To further improve the comprehensive performance of steel slag mixed soil, in the steel slag mixed soil with good toughness of polypropylene fibers, the preparation of fiber reinforced steel slag mixed soil, the study of fiber length, dosage on the steel slag mixed soil unconfined compressive strength, dry shrinkage, freezing, and other properties, and the use of scanning electron microscope characterization analysis of the effect of reinforcement on the frozen specimen microscopic morphology. The results show that fiber reinforcement can effectively improve the compressive, dry shrinkage, and frost resistance of steel slag mixed soil, and the comprehensive performance is relatively optimal when the length of reinforcing fiber is 12 mm and the dosage is 0.25%. The ductility of the reinforced specimen becomes better, and the compressive strength increases up to 16.74%; the water loss increases, but the dry shrinkage coefficient decreases up to 37.51%; the mass loss rate decreases after freezing, and the residual strength ratio improves up to 6.33%, and its micro-morphology is relatively intact, so it exhibits better resistance to dry shrinkage and freezing performance. The interfacial friction provided by the effective bonding between polypropylene fibers and the matrix and the three-dimensional mesh structure formed in the matrix is the important basis for the performance enhancement of the steel slag mixed soil.

     

/

返回文章
返回