Flowcrete provided Isorete K-Screed for the construction of the impressive Hong Kong–Zhuhai–Macau Bridge (HZMB), which is the longest sea-crossing bridge in the world. 

The main aim of the $20 billion HZMB project is to connect the cities of Hong Kong, Zhuhai and Macau. The one-of-a-kind development includes a 55-kilometre (34 mile) bridge-tunnel system with three cable-stayed bridges, an undersea tunnel and four artificial islands.

Once operational, the mega bridge is expected to accommodate tens of thousands of passengers daily. To ensure that the Hong Kong Boundary Crossing Facility (HKBCF) would be able to withstand this heavy traffic flow, Flowcrete supplied 43,000 m2 of Isocrete K-Screed, which is a cementitious subfloor screed solution. 

General Manager of Flowcrete Hong Kong Francis King said that the company was honoured to be involved in supplying an essential part of the infrastructure for the HZMB project, which is "central to the Hong Kong government's plan to improve connectivity in the region." 

“The vast numbers of people that the crossing facility would have to accommodate on a daily basis meant that the floor in the HKBCF had to be as robust and reliable as possible. Isocrete K-Screed was ideal for this, as it has been specifically designed to rapidly provide a high-performance, long lasting screed layer for large and demanding construction projects.”

The HKBCF sits on top of 130 hectares of reclaimed land and acts as a multi-modal transportation hub for the western portion of the bridge’s Hong Kong side. A failure of the flooring in this area would result in safety and operational issues. 

Isocrete K-Screed is a cementitious screed system that produces a high-strength, early-drying screed. These properties allow for quicker screed application for large-scale developments without compromising vital structural and functional properties. 

The Isocrete K-Screed system was applied in a varying thickness from 75-150mm throughout the site. Areas of application included baggage handling area, maintenance facilities and the rooftop garden as well as in the clearance, customs and departure halls.