October 2019

Mohammad Anas Wahaj | 24 oct 2019

Concrete is a preferred material, second-most used (about 22 billion ton annually), in the building and construction industry. But, it is also second-largest emitter of Carbon dioxide, as cement manufacturing accounts for 5-7% of annual emissions. According to Lucy Rodgers of BBC News, 'If the cement industry were a country, it would be the third-largest emitter in the world - behind China and the US.' In order to meet the requirements of the 2015 Paris Climate Agreement, annual cement emissions must fall by 16% by 2030. This situation brings concrete at the cusp of innovation, encouraging architects and scientists to experiment with concrete and help evolve its greener variants. Most innovations in this regard focus on reduction of cement in the concrete mix. MIT researchers developed an experimental method of manufacturing cement while eliminating CO2 emissions. Researchers at Lancaster University in the UK unveiled a novel approach of using nanoplatelets extracted from carrots and root vegetables to enhance concrete mixes. Dr. Sandra Manso-Blanco's approach of 'bioreceptive concrete' has structural concrete layered with materials to encourage the growth of CO2-absorbing moss and lichen. Another alternative mixture becoming mainstream in construction is GFRC (Glass Fiber Reinforced Concrete). The material consists of a mortar made of concrete, sand, alkali-resistant glass fiber and water. Plasticity is one of the main qualities of GFRC, enabling the molding of thinner and thus lighter façade pieces. Another novel approach to concrete used by Zaha Hadid Architects is 3D-knitted shell. Termed as KnitCandela, it is inspired by Spanish-Mexican architect and engineer Felix Candela's inventive concrete shell structures. The knitted fabric for KnitCandela was developed at ETH Zurich. ETH Zurich has been at the forefront of a number of innovations concerning concrete. With the intention of maximizing available space and avoiding steep construction costs, researchers from ETH Zurich's Department of Architecture have devised a concrete floor slab that with a thickness of a mere 2 cm, remains load-bearing and simultaneously sustainable. The institute also showcased the potential of robotically 3D printed concrete. Read on...

ArchDaily: What is the Future of Concrete in Architecture?
Author: Niall Patrick Walsh

Mohammad Anas Wahaj | 24 oct 2019

Christopher Charles Benninger, India-based US architect and author of the book 'Letters to a Young Architect', while speaking at a World Habitat Day event in Kochi (Kerala, India) advocates that Indian students should not go to US to study architecture citing higher cost incurred and subsequent settling there, but instead, they should spend 8-9 months travelling across India to see the country's traditional architectural marvels and the materials used for their construction. He suggests that architects should make use of the local climate, materials and labour force. V. Sunil Kumar, founder and MD of Asset Homes, says, 'Among the economically-backward people of India, there is a dearth of 2.5 crore homes while lower income group also lacks 3 crore houses.' Read on...

The Hindu: 'Architecture should be rooted to local culture'
Author: NA