沥青混合料用纤维性能分析

Performance analysis on the fibers of a bituminous concrete mixture

试验对比分析了木质素纤维、腈纶纤维、聚酯类纤维和矿物纤维四种常见的沥青混凝土路用纤维的性能.研究表明,纤维能显著改善沥青混凝土的材料性能,但不同纤维的性能及其改善作用存在较大的差异.腈纶纤维对改善沥青混凝土的高温性能、低温性能、水稳定性效果最好,其次为聚酯纤维,木质素纤维的最差.矿物纤维虽然有天然的性能优势,但在混合料中的性能却表现一般,因此,路用纤维的选择必须结合其在沥青混合料中的性能综合确定.

This experiment analyzed the road function properties of four familiar types of fibers in bituminous concrete, which are lignin fibers, acryhc fibers, polyester fibers and mineral fibers. The fibers can notably enhance the performance of bituminous concrete, but the function of fibers and the degrees of enhancement have big differences. The acrylic fibers can best enhance high temperature function, low temperature function and water stability properties of bituminous concrete, and the polyester fibers and hgnin films can respectively less and lest enhance the above properties. Alqthough mineral fibers have a natural function advan- tage, their function performances are common in the mixture. So the choice of fibers used for roads must be considered comprehensively combined with their function in a bituminous mixture.