Abstract
Guangxi Wuzhou City Ring Road Fudiankou Xijiang super large bridge CF60 concrete is a new multi-phase composite high-performance concrete, this paper for the Fudiankou Xijiang bridge structure and characteristics of the project, in accordance with the principle of local materials and technical specification requirements, combined with the site conditions of CF60 engineering high performance concrete component materials, proportion and the technical performance, quantify the main physical and mechanical performance index. Analysis main influencing factors of the technical indicators, reasonable adjustment of concrete mix design parameters, and the use of technical means of admixture and multi-function composite admixture of concrete, obtain the optimal proportion of good work, process, mechanical properties stability and durability of engineering properties, recommend and verification of concrete mix; to explore the CF60 high performance concrete Soil in the Fudiankou Xijiang bridge application technology, detection and tracking the quality of concrete construction, concrete structure during the construction of the key technology and control points is proposed, evaluation of CF60 high performance concrete in the actual engineering application effect and benefit to ensure engineering quality of bridge structure and service life, and super long span bridge engineering construction to provide basis and reference.
Highlights
Guangxi wuzhou of ring road Fudiankou Xijiang super large bridge is from 1 # main bridge [145 m + 270 m + 145 m of short tower cable-stayed bridge] + 2 # main bridge [131 m + 198 m + 131 m continuous rigid frame bridge] + approach bridge [11 × 40 m first supported the continuous T girder bridge], total length of 1474 m bridge
Fudiankou Xijiang super large bridge CF60 high performance concrete compared with ordinary concrete, it has more raw material variety, its uniformity, compactability to good, technical performance has improved significantly
CF60 concrete according to the principle of local materials and the requirements of technical specification, for a variety of raw materials, such as cement, coarse aggregate, fine aggregate, water, admixtures and admixtures etc., physical, chemical and mechanical properties of the test, reasonable choice
Summary
Guangxi wuzhou of ring road Fudiankou Xijiang super large bridge is from 1 # main bridge [145 m + 270 m + 145 m of short tower cable-stayed bridge] + 2 # main bridge [131 m + 198 m + 131 m continuous rigid frame bridge] + approach bridge [11 × 40 m first supported the continuous T girder bridge], total length of 1474 m bridge. The integral deck a total width of 28.5 meters, cantilever construction is used super wide and multiple trusses hanging basket, the largest cantilever segmental weight of 667 tons, wide and segment of hanging basket are domestic rare. This bridge uses CF60 high performance concrete, which is a new multi-phase composite high-quality concrete, is made of high-strength concrete, high-flow concrete is optimized, requires a good workability, process, mechanics, stability and durability and other engineering properties, the quality of its design and casting quality is important. This paper will focus elaborate CF60 high performance concrete mix optimization design and application technology
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