Hong Kong-Developed Lightweight Concrete First Applied to Yuen Long Highway Embankment
On.cc · 1 SOURCESabout 2 hours ago2 MIN
Summary
A locally developed high-ductility lightweight engineered cementitious composite (LD-ECC) has been used for the first time in Hong Kong on an embankment along a branch road connecting the Sha Tin Highway interchange to the Yuen Long Highway. The innovative material, weighing only about a quarter of traditional concrete, offers superior compressive strength and self-healing capabilities for micro-cracks. The Civil Engineering and Development Department reports that the new construction approach has halved the project timeline and cut direct building costs by 20 percent .
Key Points
- The LD-ECC embankment is located on the branch road from the Sha Tin Highway interchange in Yuen Long to the Yuen Long Highway, marking Hong Kong's first use of this innovative construction material .
- The material's weight and density are approximately one-quarter of traditional concrete, while its compressive strength exceeds conventional concrete .
- Engineers used 400mm by 400mm LD-ECC prefabricated panels as permanent formwork, filled with LD-ECC in a lightweight filling method, replacing traditional reinforced concrete construction .
- Civil Engineer Kwok Tsz-ho from the Civil Engineering and Development Department stated that prefabricated LD-ECC pieces are relatively lightweight, reducing workers' exposure to heavy material handling risks .
- The new method eliminates complex processes including falsework erection, formwork installation, and steel reinforcement fixing, simplifying construction procedures significantly .
Why It Matters
This pioneering application demonstrates Hong Kong's capacity for construction innovation, with the Construction Research and Innovation Institute allocated HK$100 million in the Budget to support multiple research initiatives. The institute has launched over 45 innovative projects since its establishment two years ago, projected to save the construction industry HK$3.1 billion annually. Technical guidelines for LD-ECC are expected to be published in the second quarter of next year to facilitate broader industry adoption .
This pioneering application demonstrates Hong Kong's capacity for construction innovation, with the Construction Research and Innovation Institute allocated HK$100 million in the Budget to support multiple research initiatives. The institute has launched over 45 innovative projects since its establishment two years ago, projected to save the construction industry HK$3.1 billion annually. Technical guidelines for LD-ECC are expected to be published in the second quarter of next year to facilitate broader industry adoption .