土木外文翻译--浅析高性能混凝土的应用-建筑结构(编辑修改稿)

土木外文翻译--浅析高性能混凝土的应用-建筑结构(编辑修改稿)内容摘要：

ng capacity of pavement, extend service life, or thinning the thickness of pavement to reduce the project cost. d. Highperformance durability of concrete pavement Highperformance concrete pavement main feature is a sufficient durability, resistant to climatic and environmental effects of longterm damage to ensure that the design of pavement and within the concrete can work properly. e. High deformation characteristics of concrete pavement (1) Shrinkage Road panel surface area of great evaporation, shrinkage may be caused by Tao panel surface of shrinkage cracks, the need to increase conservation. (2) The flexural modulus of elasticity Highperformance pavement concrete flexural elastic modulus E, by measurement, one for , 2 grade , 3 grade . Intensity of three highperformance pavement concrete mix, the aggregate amount of less coarse aggregate maximum particle diameter is smaller. f. The application of Application of highperformance pavement concrete yield significant benefits: 潍坊学院本科毕业设计外文文献及译文 5 (1) increase pavement strength。 (2) extend the pavement service life。 (3) reducing the project cost。 g. Applications (1) in the . about 70% of the road pavement using highperformance concrete: one in North Dakota, 1988 and 1989 in the summer, with 20200m3 of concrete paving thickness of 200 mm of the surface, its watercement ratio of , cement consumption 100 Kg/m3, fly ash 220 Kg/m3。 the road Texas demonstration project has successfully adopted this new material. (2) The QinghaiTibet railway construction project fully promote the use of h. Conclusion Three intensity levels of highperformance pavement concrete is extremely good quality, cost of materials basically does not increase or increased marginally, for the different requirements of the project choose to use, the construction of lowmaintenance longlife pavement, road, its social, economic benefits are enormous, and worth promoting and continued research to promote the country39。 s airports cement concrete pavement construction and road pavement engineering is entering a new stage of development to meet the growing demand for aviation and transportation needs. Marine Concrete Structures Durability of hydraulic structures to enhance port study and propose technical and economic rational, easy to promote the use of a new marine engineering highperformance concrete Span bridges, undersea tunnels and offshore oil platforms, is an instance of this application. Such as: a, Shantou, Hong Kong outside the Deepwater Channel Regulation Project。 b Lingdingyang Pearl River Estuary Deepwater Channel Regulation Project。 c, Qingdao, Ningbo Beilun and other ports that can berth 200,000ton class built tankers and ore ships deepwater berths Free Vibration of Selfpacting Concrete Due to vibrationfree selfpacting concrete has a very good work, making the concrete filling, pactness, uniformity has been significantly improved, being a new concrete technology, progress is listed as a family of high performance concrete. Vibrationfree selfpacting concrete is the first study from Japan over the last decade to develop and put into a modern concrete engineering technology. Since vibrationfree selfpacting concrete in engineering applications can be made to improve concrete quality, 潍坊学院本科毕业设计外文文献及译文 6 improve concrete construction operations, to support the construction noise and improve labor productivity, speed up the construction cost reduction and other technical and economic effect, in recent years have given the world great pay attention to. Japan is expected by 2020 there will be 1 / 2 works with the free vibration of concrete selfpacting concrete pouring. As the name suggests, vibrationfree selfpacting concrete is poured concrete, when selfgravity alone without any external force tamping to achieve selfpacting, selfleveling of a concrete. Vibrationfree Selfpacting concrete should have three characteristics: (1) Mobility。 (2) Good stability does not disintegrate。 (3) Reinforcement and templates in any gap, with a good through capacity, does not produce blocking. According to the requirements of these three characteristics, vibrationfree preparation of selfpacting concrete principles and methods section are as follows: Fresh concrete phase is a particle suspended solids, the continuous medium is a cement paste, which is liquid and Concrete Aggregates, pared with solidphase. All the particles in suspension, mobility and particle balance between segregation is necessary. Free vibration of fresh selfpacting concrete in the absence of external force to be real concrete formwork to give full fill all the gaps and achieve the pact, more importantly, to both good fluidity and stability. In order to obtain high mobility, we must。