Self-Compacting Backfill Material

Overview

NAMI's self-compacting backfill material is a highly productive, economical, safe and reliable material for pavement, utility trenches and slope works. Over 30 projects totaling 10,000m³ have been completed using this material.

  • Self-Compacting Backfill Material 0
  • Self-Compacting Backfill Material 1
Commercialisation opportunities
Non-exclusive licensing
Problem addressed

Conventional soil-based backfilling which requires layer-by-layer soil compaction is time-consuming and causes serious disruption to traffic.

Innovation
  • Contrary to conventional soil-based backfilling which requires time consuming layer-by-layer soil compaction, NAMI's backfill material can continuously be pumped into the trench, improving productivity and pavement quality. 
  • NAMI's backfill is supplied as a ready-mix material and delivered directly to the worksite in concrete trucks, or as pre-bagged dry-mix to be mixed on-site. 
  • It can be discharged directly into the excavated area or pumped over distances to areas otherwise not accessible by ready-mix concrete truck.
Key impact
  • Fast construction: shorten construction time from days to hours
  • High thermal conductivity: ideal for road with underground utilities
  • Effective backfill quality control: suitable for complex excavation sites due to high-flowability
  • Eco-friendly material: use up to 85% recycled construction waste
Award
  • Silver Medal at the “2019 Geneva International Exhibition of Inventions”
Application
  • Utility installations
  • Pavement repairs
  • Geotechnical works
  • Void filling
Nano and Advanced Materials Institute (NAMI)

As a Materials Expert, Nano and Advanced Materials Institute (NAMI) has a strong portfolio of innovative technologies to support and collaborate with the industry, offering frontier-applied research on advanced materials as well as technology transfer for commercialization success.

NAMI, incorporated in 2006, is designated by the Innovation and Technology Commission of the Hong Kong Government as a Research and Development Center for nanotechnology and advanced materials. NAMI undertakes and provides support for market-driven research in nanotechnology and advanced materials, and strives for commercialization of the technologies to benefit the industry and the society at large, as well as re-industrialization to promote the economic growth and sustainability of Hong Kong.

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