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1.A Theoretical Review on Task-based Language Instruction

Author:Wang, YL

Source:PROCEEDINGS OF INTERNATIONAL SYMPOSIUM - EDUCATIONAL RESEARCH AND EDUCATIONAL TECHNOLOGY,2018,Vol.

Abstract:This essay presents a glimpse of the task-based language teaching mode (TBLT) as one of the most influential language teaching approaches in second language acquisition. After giving a clear definition of the approach, the essay explores the theoretical rationale for TBLT, first by introducing quite a few discoveries and hypothesis concerned to illustrate present understanding of the teaching methodology and then by comparing it with the traditional methods of language instruction based on presentation, practice and production (PPP). Then the essay analyses the factors that must be taken into account in designing efficient task-based lessons, factors such as the classification of tasks, thematic contents to be chosen, criteria for task difficulty, and effect depending on performance conditions. The essay also probes into some of the limitations and drawbacks of this approach. So the essay concludes by suggesting maintenance of a balanced application of integrative approaches so that TBLT can be complemented and enriched by other approaches.

2.Compressive and flexural strength of Ultra-High Performance Fibre Reinforced Concrete containing recycled rubber crumb

Author:Wang, X;Xia, J;Li, Y

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) has excellent mechanical properties and good durability. However, the embodied energy of UHPFRC is much higher than that of ordinary concrete due to the high usage of cement. In order to reduce the adverse environmental impact of utilizing UHPFRC, recycled rubber crumb is used as an additional component or as a replacement for fine aggregates. Cube specimens with two different mix design schemes were investigated during this study. The reduction of compressive strength was investigated. UHPFRC prisms were also cast and loaded in four point bending tests to check the reduction of flexural strength. The mixing procedure and temperature variation during the casting process was recorded. Some cube specimens were heat cured in hot water at 90 degree Celsius for forty-eight hours. Those cubes were tested following curing at around 7 days to obtain the early age strength, while other cubes are normally cured in water at around 20 degree Celsius with the prisms until 28 days.
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