Quick Facts:

Type of project:
Offshore Windfarm Installation
Offshore Dafeng region, Yancheng City, Jiangsu province, China
NaX® Q110 and Q140
Project date:
June – July 2018

In Q2 2018 Nautec performed Offshore Jacket Installation grouting using NaX® Q110 HPC (High Performance Cementitious) grout at Dafeng H3# 300MW Offshore Windfarm Substation, a project owned by State Power Investment Corporation (SPIC), off the coast of Yancheng City, Jiangsu Province, China.

This was the second offshore renewable-related subsea jacket installation carried out by Nautec in Chinese waters. The first project being Binhai North Phase 2, also owned by SPIC, was completed by our team in April 2017.

The grouting team used 110 tons of NaX® Q110 HPC grout materials for the installation services and completed the grouting operation in 4 accumulated days, with an actual grouting time of 36 hours, notwithstanding delays due to bad weather and leaking seals.


  • Renewable Energy
  • Subsea Jacket Installation
  • Offshore Grouting Services
  • Supply of HPC Materials


  • Supply of grouting materials
  • Technical expertise & manpower for grouting operation in cooperation with Chinese local company, Zhuhai Ruimiao Company.

Client Benefits

  • NaX® Q110 HPC grout, part of Nautec’s proprietary High Performace Cementitious grout product range, has been developed specifically for annulus grouting in offshore structures. A rapid strength development ensures high early-age strength.
  • The project required moderate grout compressive strength of 80 MPa before subsequent installation of topside module onto jacket structure could be carried out. This was achieved within 3 days after grouting at 20°C.
  • The team used a simplified grouting spread, which eliminated the need for a crane, by having mixers placed directly on deck to facilitate loading of grout bags using forklift and then lifted over pump using forklift.
  • The grouting services were completed ahead of schedule for the installation of the topside module despite some bad weather days and leaking rubber seals.

Click here to read the project case history.