CCR201504摘要翻译.docx

1.Geopolymer concrete-filled pultruded composite beams – Concrete mix design and application地质聚合物钢管混凝土轻质复合梁-混凝土混合料配合比设计及应用Original Research ArticlePages 1-13Wahid Ferdous, Allan Manalo, Amar Khennane, Obada KayaliAbstractThe limited research on the geopolymer concrete mix design for targeting a specific strength is identified an obstacle for their effective design and wide use. In this paper, a mix design procedure has been proposed for fly-ash based geopolymer concrete and its use as infill hybrid composite beam is investigated. Then, the structural performance of geopolymer concrete filled hybrid composite beam is investigated to determine their possible application in civil infrastructure. Firstly, a detailed procedure of mix design for fly-ash based geopolymer concrete is presented. Secondly, three hybrid beams filled with geopolymer concrete were prepared and tested in a four-point bending setup to evaluate their flexural modulus and modulus of rupture. Numerical and analytical evaluation of the behaviour of hybrid beam were performed and results showed a good agreement with the experimental investigation. Thirdly, the suitability of the beam for a composite railway sleeper is evaluated and compared with existing timber and composite sleepers. Finally, the beams’ performance in a ballast railway track is analysed using Strand7 finite element simulation software and the results showed that the new concept of using geopolymer concrete as infill to pultruded composite section satisfied the stiffness and strength requirements for a railway sleeper.有限的研究表明，针对特定强度的地质聚合物混凝土混合料配合比设计被认为是一个障碍，使得这种聚合物不能得到高效的设计和广泛使用。本文结合设计过程提出了基于粉煤灰地质聚合物混凝土及其使用加密混合复合梁调查。然后,地质聚合物混凝土填充混合复合梁的结构性能研究,以确定其可能的在民用基础设施的应用。首先, 论述了基于粉煤灰地质聚合物混凝土的混合料配合比设计的详细过程。其次,试验中制备了三个以地质聚合物混凝土填充的混合梁；并通过四点弯曲测试来评估它们的弯曲模量和断裂模量；最后通过数值分析，得到混合梁的应力表现,结果表明与实验调查相符合。第三,对于这种复合梁对复合铁路轨枕梁的适用性进行了评估,并与现有的木材和复合枕梁进行了比较。最后,利用有限元仿真软件和分析对压载铁路轨道梁的性能进行了分析，结果表明,使用地质聚合物混凝土的新概念作为轻质复合加密部分满足铁路枕木的刚度和强度要求。2.Influence of relative humidity on del