2016
Cameron Highlands, Pahang, Malaysia

Tenaga Nasional Berhad (TNB) is the major power utility company involved in the generation, transmission and distribution of electricity through their hydropower plant in the Ulu Jelai District, State of Pahang in Malaysia. The latter involved the construction and operation of an accumulation reservoir hydropower plant with a total installed capacity of 382 MW and is estimated to generate average 374 GWh of electricity per annum.

Project Requirements

The main structures comprises:

  • 90 metres high RCC dam
  • Un-gated Spillway
  • Bottom outlet and hydro-mechanical accessories
  • Power intake tower;
  • Power water-way underground
  • Concrete lined surge shaft and surge tank
  • Underground powerhouse
  • Transformer chamber cavern
  • Surge chamber cavern
  • Water transfer tunnels (16 kilometres, excavated by TBM)
  • Tunnelling works (Headrace Tunnel, Tailrace Tunnel, Main Access Tunnel and Service Tunnels Approx. 10 km in total)
  • Switchyard
  • Generation Control Building
  • Access Road

Sika Solutions

The design of the RCC mixes took quite long time to define the proper mix for upstream RCC, downstream RCC, upper dam and lower dam ranging from high to low cementitious solutions with long setting times to ensure the bonding of the RCC layers. Plastiment® TM-21 retarder for RCC found an extensive use for RCC production.

More than 30 km of underground structures require a massive use of shotcrete technologies with alkali free shotcrete accelerators steel fibers reinforced even with site batching plant the complex internal logistic required long open time for the base concrete mixes.

Sigunit® L-53 AF MY was adopeted as best performing solution for shotcrete accelerator while Sika® ViscoCrete® SC 315 MY was able to ensure a 3 hours open time for shotcrete base mixes.
 

Products Used

Sigunit® L-53 MY
Sikament®-163 MY
SikaFibre® CHO 65/35 NB
Sika® ViscoCrete® SC-315 MY
Plastiment® TM-21
Sika Friazinc R
Sika MonoTop®-620 MY
SikaFuko® VT-1
Sika AnchorFix®-S
SikaGrout®-214

Sika® Latex
Sika® Antisol® A
Sika® Formol EX
Sika® Intraplast® Z
Sika® Rugasol® G
SikaFuko® Swell-1
Sikagard®-62 MY
Sikadur®-43/42
Sika® Waterbar O-25 M
SikaCrete® Gunite-103

Project Participants

Construction
JV TM-Salini

Sika Organizations
Sika Malaysia
Sika Services

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