伊斯坦布尔萨比哈Gökcen国际机场混凝土跑道的夜间更新

M. Bäuml, Jakob Melchior, Felicia Constandopoulos
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摘要

在过去的几年里,新的快速硬化混凝土被开发出来。它们不仅以其高的早期强度脱颖而出,在凝结后90分钟就超过20mpa,而且在新混凝土性能和凝结性能方面也可以根据施工现场的需要进行调整。这允许使用传统方法放置快速硬化混凝土,并优化施工程序,以便在非常短的关闭窗口期间进行更新。经过多年的使用,伊斯坦布尔萨比哈Gökcen国际机场的单跑道需要大规模的更新,因为中心线周围的高磨损区域严重损坏。但是,由于它是机场唯一的跑道,关闭几个星期来进行更新是不可能的。由于深夜和清晨的航班,每晚只关闭5个小时,这对快速硬化的混凝土、施工现场的物流和混凝土的长期耐久性提出了额外的要求。本文介绍了Sabiha Gökcen机场的逐步夜间更新,这是有史以来最大的涉及快速硬化混凝土的项目。在2018年3月至9月期间的117个晚上,每天晚上最多更换5块跑道(94平方米),总面积为8700平方米。由于最新一代的快速硬化水泥,这种不影响常规机场运营的大面积应用成为可能,本文向项目业主、设计工程师和承包商展示了这些可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Over-night Renewals of the Concrete Runway at Sabiha Gökcen International Airport Istanbul
Over the last couple of years, new rapid-hardening concretes were developed. They do not only stand out by their high early strength, in excess of 20 MPa already 90 minutes after setting, but are also adjustable to the needs of the construction site in regards to fresh concrete properties and setting behavior. This allows the rapid-hardening concrete to be placed using traditional means and the construction program to be optimized in order to perform the renewals during very short closure windows. After many years of usage, the single runway at Sabiha Gökcen International Airport Istanbul was in need of large-scale renewals due to severe damages in the high wear areas around the centerline. But, with it being the only runway at the airport, closing it for multiple weeks to perform the renewal was not an option. The nightly closure of only 5 hours, due to late-evening and early-morning flights, placed additional demands on the rapid-hardening concrete, the logistics of the construction site and the concrete's long-term durability for a permanent solution. This article presents the step-by-step over-night renewals at Sabiha Gökcen Airport, which is the largest project ever performed involving rapid-hardening concrete. Each night up to 5 slabs (94 m2) of the runway were replaced for a total area of 8700 m2 over 117 nights between March and September 2018. Such large area applications without affecting regular airport operations are possible thanks to the latest generation of rapid-hardening cement and this article shows these possibilities to project owners, design engineers, and contractors.
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