Stronger concrete needed to fix ‘basic mistake’ of defective MTR station columns: experts

Hong Kong’s railway operator can use high-strength concrete to rectify the structure of dozens of defective columns at a station under construction, an engineer and a construction sector leader have said, describing the shoddy work as a “basic mistake”.

Engineering sector lawmaker Aaron Bok Kwok-ming, deputy chairman of the Legislative Council’s railways subcommittee, said the contractor could fill the gaps with higher-strength concrete, such as non-shrink grout, to restore adequate structural support.