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
Hong Kong Applied Science and Technology Research Institute (ASTRI)

Hong Kong Applied Science and Technology Research Institute (ASTRI) is founded in 2000 by the Government of the Hong Kong Special Administrative Region. As Hong Kong’s largest government-funded research and development centre, ASTRI is a key force and super connector driving innovation and technology advancement in Hong Kong, the Greater Bay Area, and the global innovation ecosystem. This role is strengthened through its merger with Nano and Advanced Materials Institute (NAMI).

Committed to bringing high impact research from lab to market, ASTRI advances interdisciplinary, market driven R&D that delivers practical innovations for industry and meaningful benefits for society.

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