Reaching a height of 634 meters, the Tokyo Sky Tree is not only the highest broadcasting tower in the world, but also the second tallest building after the Burj Khalifa in Dubai, which stands at roughly 830 meters. Tokyo’s landmark project with its central concrete pillar was built within only 6 months. The short construction time was achieved by continuous concrete slipform casting. Sika’s concrete superplasticizers assured high flowability during concrete filling and fast initial strength development for accelerated de-molding. The superplasticizers employed in Tokyo are high-performance formulations. To complement the established product range, Sika has now developed a bio-based version of its concrete superplasticizers.

BIO-BASED SIKA® ViscoCrete® SOON TO BE LAUNCHED

The new technology contains polymers produced mainly with renewable raw materials, being the first of its kind in the construction industry. Polymers, the main component in superplasticizers, are added to concrete to influence properties such as workability, setting time and durability in a favorable way, depending on the desired application. This eco-friendly innovation is in line with one of Sika's stated corporate goals of sustainable product development. Bio-based ViscoCrete® was launched end of 2013 in India and will be introduced in North America and in Europe in 2014.

RENEWABLE VEGETABLE SUBSTANCES IN PLACE OF OIL-BASED RAW MATERIALS

The key components of standard concrete admixtures are polymeric components chemically produced from oil-based raw materials. In the newly developed product, over 80 percent of the oil-based raw materials have been replaced by renewable vegetable substances left as waste from sugar production. In addition to the ecological benefits, bio-based ViscoCrete® also enhances concrete properties, including a substantial water reduction and robust behavior in fresh concrete.

CO₂ emissions of Concrete down by 20% through use of Concrete Admixtures

Even if concrete admixtures make up only a low 2-6 kg per cubic meter of concrete, they play a vital part in enhancing the concrete's sustainability. Superplasticizers can reduce the overall binder content in concrete as well as the water component, while maintaining the product features. In addition, the clinker content in cement can be decreased by using alternative cementitious materials. This brings down the energy consumption and carbon footprint of concrete by more than 20 percent over its complete life cycle.

RENEWABLE VEGETABLE SUBSTANCES IN PLACE OF OIL-BASED RAW MATERIALS

The key components of standard concrete admixtures are polymeric components chemically produced from oil-based raw materials. In the newly developed product, over 80 percent of the oil-based raw materials have been replaced by renewable vegetable substances left as waste from sugar production. In addition to the ecological benefits, bio-based ViscoCrete® also enhances concrete properties, including a substantial water reduction and robust behavior in fresh concrete.