对于再生混凝土,目前主要研究单掺纤维进行再生混凝土的性能增强研究,而对于再生纤维,尤其是混杂再生纤维进行性能增强的研究少有涉及。基于废旧轮胎中所剥离出的钢纤维及尼龙纤维,通过27组共81个试块的基本力学性能试验,探讨再生纤维对普通再生混凝土基本力学性能的影响。分析不同掺量再生纤维对不同取代率再生混凝土抗压、抗拉及变形性能的影响,结果表明,再生纤维能够有效地增强各取代率下普通再生混凝土的劈裂抗拉强度、抗折强度、延性及抗裂性能,但对于抗压强度略有降低,其再生纤维的掺量优化还有待于进一步研究。

For enhanced performance of recycled aggregate concrete , researches are mainly on single fiber recycled aggregate concrete , which are rarely involved in hybrid renewable fiber on performance enhancement .Based on recycled steel fiber and nylon fiber from waste tires in the stripping , through 27 groups of 81 specimens , it was studied the basic mechanical properties and investigated the effect of recycled fiber on the basic mechanical properties of recycled aggregate concrete .Through the test it was analyzed the effect of different content of the recycled hybrid fiber to replace rate , tensile & compressive strength and deformation performance of the recycled aggregate concrete with different replacement rate , the results show that the recycled steel fiber can effectively enhance the splitting tensile strength , flexural strength , ductility and crack resistance of the recycled aggregate concrete with all replacement rates .But for the compressive strength decreased slightly .The c

再生纤维素纤维以可再生、可生物降解的天然纤维素为原料，它的研究和开发对充分利用纤维素资源和促进纤维行业的可持续发展具有重要意义。离子液体和碱溶液溶剂体系对纤维素具有独特的溶解性能，为再生纤维素纤维的制备提供了新方法。这种新型的再生纤维素纤维具有制备过程简单、对环境无污染、纤维力学性能优异或生产成本低等优点，发展前景十分广阔。综述了离子液体法和碱溶液法再生纤维素纤维的最新研究进展，包括溶剂种类及其溶解能力、纤维素原料的性质与选择、纤维的制备方法和力学性能等，同时归纳和对比了各因素对新型再生纤维素纤维力学性能的影响。最后展望了两种新型再生纤维素纤维存在的挑战、未来发展趋势和工业化前景。

Research and development of regenerated cellulose fibers prepared from renewable and biodegradable natural cellulose is of great significance to making full use of cellulose resources and promoting sustainable development of fiber industry. Recently, novel regenerated cellulose fibers have been prepared from ionic liquids and alkaline solution systems due to their excellent solubility for cellulose. The preparation processes of these fibers are comparatively simple and cause less pollution than that of the traditional techniques. The fibers produced by the ionic liquids method have excellent mechanical properties, while the fibers produced by the alkaline solution method are comparatively inexpensive. The recent developments of novel regenerated cellulose fibers using ionic liquids and alkaline solution systems as solvents are reviewed, including types of solvents, selection of raw materials, preparation methods and mechanical properties of the fibers. The effects of various

为了提高再生混凝土的力学及抗裂性能,在再生混凝土中掺入聚丙烯纤维及钢纤维进行试验,对再生混凝土的强度及脆性、拉压比和弹强比等作了研究,结果表明,掺入混杂纤维可提高再生混凝土的抗压强度、劈拉强度,降低再生混凝土的脆性,提高抗裂性能。

To improve the mechanical properties and crack resistance of recycled concrete,this paper have a research on recycled concrete with polypropylene fiber and steel fibre and analyse the strength,brittleness,the proportion of tensile strength and compressive strength. Results show that adding hybrid fiber can improve compressive strength and splitting tensile strength and the anti-cracking performance of recycled concrete and can reduce the brittleness of recycled concrete.

对1根普通混凝土柱和3根再生混凝土柱模型进行低周反复荷载试验研究。再生混凝土柱分别为普通再生混凝土柱、含再生砖粒再生混凝土柱及硅粉和纤维增强的再生砖粒混凝土柱。通过试验对比分析了4根柱子的破坏形态、滞回特性、刚度退化、延性性能、能量耗散及其承载力,从而进行砖粒及硅粉和纤维增强的砖粒再生混凝土柱抗震性能的研究。研究表明:相对于普通混凝土柱,3根再生混凝土柱的抗震能力呈下降趋势。但是,掺入再生砖粒的再生混凝土的弹性模量和延性都明显下降,而硅粉和纤维的掺入可明显提高其弹性模量和延性性能。

Low-cycle loading tests were carried out for 1 common concrete column and 3 recycled concrete columns models.Recycled concrete columns were respectively ordinary regeneration concrete column , regenerated brick granules recycled concrete column , silicon powder and fiber reinforced regenerated brick granule recycled concrete column.Through the experiment comparison , it was analysed the failure modes , the hysteretic performance , degradation of rigidity , ductility, energy dissipation and the load capability of the 4 specimens.Based on which it was studied the seismic performance of the brick granules and silicon powder and fiber reinforced recycled concrete column.Research showed that compared with ordinary concrete column , the seismic resistance of 3 pieces of the regenerated concrete columns was decreased .But regenerated brick grains recycled concrete elastic modulus and ductility were significantly decreased , and silicon powder and fiber could obviously improve their elastic mo

随着生活水平的提高,人们对织物性能的要求越来越高。因此,许多科学家致力于新型纤维的开发,再生纤维素纤维在这样的环境下应运而生。采用几种常用的鉴别方法对各种再生纤维素纤维进行鉴别,并对它们的结构进行简单的分析。

With the improvement of living standards , people ’ s demands for the performance of fabric are getting higher and higher .Therefore , many scientists are committed to the development of new type fibers , and regenerated cellulose fibers are developed in such an environment .Several common identification methods were used for identifing these regenerated cellulose fibers , and their performances were simply compared.