L&T Construction, the construction arm of Larsen & Toubro, has successfully 3D printed a Ground plus one Building with reinforcement for the first time in India, the company said in a statement. With the country aggressively pursuing the objective of creating 60 million houses under the Housing for All by 2022 programme, this achievement will certainly give a huge fillip for the mass housing segment, it added.
3D printing is a process, in which the material is printed under computer control to build a 3-dimensional product, typically layer by layer. It is predominantly used in manufacturing industries to print rapid prototypes, complex shapes and small batch production. However, due to some inherent advantages 3D printing technology is also being used in construction nowadays. 3D printing will not only accelerate the pace of construction, but also significantly improve build quality.
The 3D printed building, which has a built up area of 700-sq.ft and is located at L&T Construction’s Kanchipuram facility, has been built with a special, in-house developed concrete mix using indigenously available regular construction materials. The building was printed with both vertical reinforcement bars and horizontal distributors using welded mesh, that satisfy provisions in the Indian Codes and optimise the cost of construction. Barring the horizontal slab members, the entire building structure was 3D printed ‘Cast in Situ’ at the job site in an ‘open to sky’ environment within 106 printing hours, using a fully automated 3D printer.
Earlier in November 2019, the team had 3D printed 240-sq.ft 1 BHK, in line with the typical EWS (Economically Weaker Sections) building layout to explore the feasibility of this innovative technology.