ArticlesBlog

Salt and Pepper for Concrete

Salt and Pepper for Concrete


As one of Sika’s Key Markets Segments we now present: CONCRETE The increasing world population, with urbanization and megacities creates a higher demand for infrastructure and refurbishment solutions. Sika provides solutions for concrete, cement and mortars that enhance specific properties of concrete. To meet this great demand of High Performance products for the building sector, Sika keeps developing solutions to improve Concrete DURABILITY, SETTING PROPERTIES, and WORKABILITY for a sustainable world. Let’s look into WORKABILITY. With our technology we help to bridge distances and save money. Be it in urban areas with congested traffic or in remote areas with long transportation times. Even in very hot or very cold climate zones. With our technology we can modify the workability time from minutes to hours. Or the opposite: We can increase the speed from days to hours. One such exemplary project for Workability is the Lakhta Tower with a height of 462 meters, soon to be Europe’s tallest building. The task of firmly anchoring the Lakhta Tower posed particular challenges for the foundations. The tower itself is mounted on 264 piles that were drilled as deep as 82 meters below ground level. In order to support this structure a 3.6-meter thick foundation slab was poured in a single seamless operation. Drawing on Sika’s know-how and a specific formulation of Sika®ViscoCrete®, Sika®Retarder and
Sika®Antisol®, a concrete was developed that matched the specifications exactly. This guaranteed the necessary constancy of the concrete’s pump, flow,
and curing properties, and provided a setting time of 8 to 10 hours. The ready-mixed concrete was manufactured in 13 different plants and transported to the construction site in a total of 2,540 deliveries. Thanks to Sika, the concrete could be poured in one continuous 50-hour period to form a solid, uniform foundation. This feat even earned an entry in the Guinness World Records. Another success factor for Sika is the sprayed concrete for tunneling and mining. In our case: the early or final strength – requested by our customers. We can reduce the high early strength from minutes to seconds. In mining, Sika tackles the growing demand for underground rock support that can be quickly installed with its Sika® Sigunit® and Fiber technologies. Rapid mine development is reinforced by a close collaboration between Sika and its mining partners – further supporting best practice in mining across the globe. Long service life is achieved with the application of a well-defined, engineered system. We prove the durability of our solutions every day with the Gotthard Tunnel in the Swiss Alps where Sika’s success story started more than 100 years ago. Thin construction, high rise buildings, wide span of bridges or architectural concrete – all these applications ask for high performance or ultra-high performance concrete for durability and very high strength. Waterview Connection is the largest road project ever undertaken in New Zealand. To build this enormous Motorway ring route around the city of Auckland, 24’000 watertight pre-cast concrete segments were used – made of concrete with specialty superplasticizer Sika® ViscoCrete® admixture. Each of the precast elements weighs up to 10.2 tons. Sika has a worldwide network of 20 Global Technology Centers which take the lead in long-term research programs and the development of new innovative solutions. To meet local markets’ specific needs and requirements, new products and systems are also developed across the 18 Regional Technology Centers. As the world is becoming more complex and the alternative use of cementitious materials is on the rise, there is also an increased need for our admixtures. We strive to replace cement partly and work with recycled aggregates to produce sustainable concrete. We are continuing to search for better, more energy-efficient and environmentally friendly products. And every day we strive to provide better solutions and find answers to the next questions.

Comment here