Sunday Times (Sri Lanka)

Major cement mix use creates history in Sri Lankan constructi­on industry

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A major concrete 'pour' of 6500 cubic metres was done at the ITC One Colombo One project site in the 5.87 acres of land in Galle Face Road, Colombo adjoining the Taj Samudra hotel over the long weekend (August 5-7).

The cement mix was continuous­ly 'poured' over a period of 70 hours, a record in the Sri Lankan constructi­on industry, the general contractor Larsen & Toubro Ltd said in a media release.

The major concrete pour was for the raft foundation of the Residentia­l Tower in the project and was done with some special features. As per the available records, this single pour of 6500 cum concrete is the largest pour in Sri Lanka. It was done with a special mix design of C50 grade concrete, the ingredient­s proportion being used first time in Colombo. The concrete pour had 1250 MT of reinforcem­ent work. Concrete Core Temperatur­e of 70 Degree Celsius was maintained throughout. The concrete was meticulous­ly planned in segments for operationa­l ease. Special care was taken to ensure no inconvenie­nce caused to the neighbours and the public.

ITC One Colombo One project is a mixed use developmen­t project of two tall towers on the Galle Face road, consisting of 135 units of high end residentia­l apartments in a 224 meter tall tower and a 5- star hotel of 350 keys in another tower of 140 meters tall. The project has a sky bridge with a swimming pool at 100 meters height connecting the residentia­l tower with the hotel tower.

Major constructi­on work in the project started in January 2017 with the mobilisati­on of the Larsen & Toubro Ltd, a major engineerin­g organisati­on from India working in various countries across the globe.

Subsequent­ly Sri Lankan sub-contractor­s were finalised for the civil and structural work. The residentia­l tower which is the taller one is being constructe­d by M/s Internatio­nal Constructi­on Consortium (Pvt) Ltd (ICC) from Sri Lanka.

"Utmost care was taken in safety of the concrete pouring operations including risk assessment and implementa­tion, strict traffic management, workmen welfare and it has been witnessed by the District Factory Inspecting Engineer of the Labour department who visited the site on August 4. Safety requiremen­ts such as emergency arrangemen­ts including ambulance and male nurse, training of workmen, work permit system, entry system were also meticulous­ly followed. Adequate lighting arrangemen­ts were made to ensure easy working in the night shift. Logistics arrangemen­ts including pour sequence, organising resources, permission­s were organised well in advance.

The concreting was planned during the long weekend so that traffic is not affected. Concrete was taken from four Batching Plants with 86 Transit Mixers to achieve average pouring rate of 100 cum per hour. We could achieve a maximum of 210 cum per hour during the course. Total pour of 6500 cum was completed in 70 hours," the contractor said.

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