Printed concrete column against the sky, School 08, Doha

Printed on site
in Qatar

Walls and columns printed on site in 20 mm layers by GGI's certified crew. The printer follows a toolpath drawn from the design, so curved walls need no moulds.

3D concrete printing
at GGI

3D concrete printing is our newest line. We operate our own printers with our own certified crew, and the same team hands the walls over.

2Printers at
School 08

≥ 35 MPaCompressive strength
at 28 days

30 minFrom arrival
to printing

6 mMaximum
print height

How a wall
is printed

Concrete is pumped to a nozzle and laid down in 20 mm layers along a toolpath drawn from the design.

Printer, pump
and crew

Our printer is built in France and improved in Qatar by GGI's R&D team. It runs on tracks, stands on deployable legs without a foundation or gantry, and drives itself to the next room.

The printer from behind, legs deployed, on the roof slab at School 08

2,700 kgWeight

13.8 mReach diameter

160 mm/sMaximum speed

0.85 mFolded width

Reach	13.8 m diameter at 3.85 m height
Print height	Up to 6 m, at reduced reach
Set-up	30 min to unfold and print
Foundation	None: deployable legs level the machine
Moving on	Folds and drives itself to the next room; craned onto the slab for upper floors
Folded	0.85 m wide, 1.99 m tall; fits a 20-ft container
Pump	Automatic mixer-pump, 15 m hose; water added at the pump
Crew	Operators trained and certified by the manufacturer in France

Dry mix

Factory-blended, delivered to site in jumbo bags.

Mixer-pump

The mixer-pump adds the water on site.

Hose

Pumped along the arm, through 15 m of hose.

Nozzle

Extruded layer by layer, shaped by the toolpath.

The printing
mix

The mix is pre-blended and delivered in jumbo bags. It reaches 10 MPa in one day, so work on the wall continues the next day, and 35 MPa at 28 days.

Property	Value	What it means
Compressive strength, 1 day	≥ 10 MPa	Work on the wall continues the next day
Compressive strength, 28 days	≥ 35 MPa	Structural-concrete range; 7 to 10 times AAC
Tensile splitting, 28 days	≥ 3.5 MPa	Walls still need steel reinforcement
Density	1,900–2,100 kg/m³	A little lighter than ordinary concrete
Thermal conductivity	1.8–2.0 W/(m·K)	Insulation comes from filled wall cavities
Shrinkage	≤ 0.7 mm/m	Joints with AAC walls are detailed for movement

Nozzle printing a test wall during operator training

How a project
runs

Six steps, run by one GGI team from the first site review to handover.

01
Site and design review
We confirm the plot, access and ground, and adapt the design for printing.
02
Print plan
Machine positions, print order and material quantities are fixed before we mobilise.
03
Approvals
Submission drawings and position layouts come from the same plan.
04
Mobilise
Printer, mixer-pump, dry mix and a certified crew arrive; the printer unfolds in 30 minutes.
05
Print
Walls rise position by position; steel, lintels and service channels go in as they rise.
06
Hand over
Cavities are insulated and the printed walls are ready for the next trades.

Trained and certified
in France

Every GGI printer runs with its own certified crew. Three operators completed the manufacturer's certification training at the factory in France in March 2026, then printed School 08.

3GGI operators
certified

2Training courses
in France, 2026

2Operators
per printer

30 minTo unfold
and print

01
Certification training
Machine, pump, print planning, start-up, cleaning and error codes, assessed by the manufacturer.
02
Trained at the factory
Two courses at the manufacturer's factory in France, 11 to 13 March and 22 to 28 March 2026.
03
On site in Qatar
The same operators set up, printed and handed over the printed walls at School 08.

GGI trainees with a printer at the certification training in France

GGI operator at the printer controls on the roof slab

What we
print

Six applications, all printed with the same machine, material and crew. Each has its own brochure, sent on request. The villa, majlis, heritage, defence and municipal images are design concepts.

01 Education

Schools with printed outer walls and AAC inside, delivered at School 08 of Ashghal's PPP programme.
02 Villas

G+1 villas with printed outer walls and AAC inside, in four printed finishes with optional sculpted elements.
03 Majlis

Curved printed walls and a glazed front: Desert Rose, Pavilion, Arabesque or Modern.
04 Heritage

Design concepts based on landmarks in Qatar and Saudi Arabia, reworked as printed buildings for new uses.
05 Defence

Blast walls, bunkers, guard posts and barriers for armed forces and critical infrastructure.
06 Municipality

Benches, bin enclosures, bus shelters and shade for municipalities, printed in Qatar.