高度超過800米、多達160層的迪拜塔(Burj Dubai)拔地而起，直沖云霄。這座全世界最高的建筑物于2010年1月4日建成揭幕。巴斯夫的混凝土外加劑Glenium SKY幫助迪拜塔創(chuàng)造了全球建筑物高度的新紀錄。迪拜塔輕松超越了位于臺灣的臺北101大樓 -- 臺北國際金融中心，使這座高509米、共101層的大廈從此退居世界第二位。
迪拜塔的施工為期五年，其令人炫目的高度以及極端的氣候條件，給混凝土外加劑帶來了特殊的挑戰(zhàn)：憑借巴斯夫的Glenium SKY品牌高性能混凝土外加劑，混凝土可以不間斷地泵送至600米的高度。迪拜塔的地基和上層結(jié)構(gòu)大約需要18萬立方米添加了Glenium 增塑劑的混凝土。巴斯夫化學建材業(yè)務(wù)部負責人敖云峰(Tilman Krauch)博士表示，“迪拜塔的建造是工程史上的杰作，我們很自豪能夠為這項工程的建成做出貢獻?！?/P>
巴斯夫提供的這種基于聚羧酸聚合物的混凝土外加劑具有卓越的流動性，可以防止混凝土在泵送過程中因高壓而分層離析。在施工現(xiàn)場，通過使用Glenium SKY可以輕松地處理混凝土，避免品質(zhì)受損。此外，Glenium SKY高性能外加劑可以提高混凝土的早硬強度。每一樓層澆筑的混凝土可以迅速達到足夠的穩(wěn)定性，使施工在短時間內(nèi)得以繼續(xù)。通過這種方式，Glenium SKY能夠確保建筑工作的快速進展。在迪拜，通常的施工進度為每周一層，而迪拜塔的施工超越了這種進度，達到每周兩層。
建造這座世界第一高樓時還需面臨的更多挑戰(zhàn)是迪拜的氣候條件：這里的氣溫冬季低至10°C，夏季則高達50°C，且晝夜溫差常常達到20°C。盡管如此，Glenium SKY的優(yōu)異性能以及現(xiàn)場巴斯夫團隊的專業(yè)技術(shù)確保了混凝土一貫的高品質(zhì)。
另外，迪拜塔的超常高度給混凝土結(jié)構(gòu)帶來了極大的壓強。為了防止這座摩天大樓坍塌，Glenium SKY使混凝土的耐壓強度高達80N/mm2。這相當于一輛小汽車的重量施加在一個大腳趾上的壓強。高耐壓強度可以使混凝土結(jié)構(gòu)擁有長久的使用壽命，從而確保迪拜塔的可持續(xù)使用。
巴斯夫化學建材服務(wù)中國市場長達20年，作為業(yè)內(nèi)倍受信賴的合作伙伴，巴斯夫為眾多著名項目作出了貢獻，其中包括廣州西塔、臺北101、杭州灣大橋、三峽大壩和中國高速鐵路等。
附英文版：
Rising more than 800 meters to 160 stories, the Burj Dubai appears to touch the Dubai skies. On January 4, 2010, the tallest building in the world is opened. Glenium SKY concrete additives from BASF helped to achieve this new world record in altitude. The Burj Dubai comfortably exceeds the Taipeh International Financial Centre in Taiwan, which boasts a height of 509 meters and 101 stories, relegating it to second in global ranking.
With a construction period of five years, dizzying heights and extreme climate conditions, the Burj Dubai presented a very special challenge to the concrete plasticizer: With the high-performance concrete plasticizer from BASF sold under the brand name Glenium SKY it was possible to pump the concrete up to an altitude of 600 meters without interruption. The foundations and the superstructure of the Burj Dubai required approximately 180,000 m3 concrete with Glenium plasticizer. “The construction of Burj Dubai is an engineering master piece. We are proud that we could contribute to the success of this project,” said Dr. Tilman Krauch, Head of Construction Chemicals division of BASF.
The concrete additives, which are based on polycarboxylate ether polymers, ensure great flowability and, during the pumping process, they are able to prevent segregation in spite of the high pressure used. On site, it was easy to process the concrete without quality loss due to Glenium SKY. In addition, Glenium SKY super-plasticizers improve the concrete’s early strength. The concrete cast to build a new story quickly reaches sufficient stability so that construction work can be continued after a short while. This way, Glenium SKY helped to ensure that building work progressed quickly. With two stories built per week, the building speed exceeded
the usual Dubai standard of one story a week.
Further challenges that had to be met when constructing the tallest building in the world were the climate conditions in Dubai: Here, the temperatures not only fluctuate between 10°C in winter and 50°C in summer but the temperature difference between day and night can easily reach 20°C. Glenium SKY and the expertise of the BASF team on site, however, made sure that the concrete was of a consistently high quality.
In addition, the enormous height of the Burj Dubai causes extreme pressure in the concrete structure. To prevent the skyscraper from collapsing, Glenium SKY lends the concrete a compressive strength of up to 80 N/mm2. This equals the entire weight of a small car resting on a space as small as the big toe. The great strength gives the concrete structure a long lifespan and ensures the sustainable use of the tower.
With a strong presence in China for 20 years, BASF’s Construction Chemicals has been recognized as a reliable partner in the industry and has contributed to many prestigious projects including Guangzhou West Tower, Taipei 101, Hangzhou Bay Bridge, Three Gorges Dam and China High-speed Railway.
