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Sika develops recycling process for concrete

March 03/2021

MOSCOW (MRC) -- Sika, a producer of construction chemicals, says it has developed a recycling process for old concrete, said Chemweek.

The technology breaks old concrete down into gravel, sand, and limestone in a process that binds about 60 kilograms (kg) of carbon dioxide (CO2) per metric ton of crushed concrete demolition waste. The company says the development will make a significant contribution to reducing the ecological footprint of the construction industry.

"In the five largest EU countries alone, roughly 300 million [metric tons] of old concrete are generated every year. With complete recycling of these materials, up to 15 million metric tons of CO2 emissions can be captured, says Paul Schuler, CEO of Sika.

About 2530% of all waste generated in the EU is construction demolition waste materials, many of which could be recycled, according to the European Commission. Sika says that recycling these materials is particularly crucial in dense urban areas, because this is where most old concrete accumulates.

Comparative testing of Sikas process has demonstrated that new concrete containing recycled content performs similarly to an all-new product, the company says. Further process optimization can be achieved through the development of additional chemical additives, Sika says.

"We are already developing complementary chemical additives and quality enhancers, and are pushing the industrialization of our new technology, says Frank Hoefflin, CTO at Sika.

As MRC informed earlier, Sika commissioned a manufacturing facility in Dubai, United Arab Emirates (UAE), which produces epoxy resins aimed at flooring solutions. Sika has decided to invest in the expansion of its manufacturing facilities at the Dubai site in order to increase flexibility in production, shorten delivery times, optimize cost structures, and reduce inventories.

We remind that Russia's output of chemical products rose in November 2020 by 9.5% year on year. At the same time, production of basic chemicals increased in the first eleven months of 2020 by 6.6% year on year, according to Rosstat's data. According to the Federal State Statistics Service of the Russian Federation, polymers in primary form accounted for the greatest increase in the January-November 2020 output. November production of polymers in primary form rose to 896,000 tonnes from 852,000 tonnes in October. Overall output of polymers in primary form totalled 9,240,000 tonnes over the stated period, up by 17.1%  year on year.

Sika is a specialty chemicals company with a leading position in the development and production of systems and products for bonding, sealing, damping, reinforcing, and protecting in the building sector and motor vehicle industry. Sika has subsidiaries in 101 countries around the world and manufactures in over 200 factories. Its more than 20,000 employees generated annual sales of CHF 7.09 billion in 2018.
Author:Anna Larionova
Tags:construction, Polistirolbeton, Sika.
Category:General News
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