Construction sites

Cement types

Gravel classes

Origin of sand

Quantity of water

Mixing of concrete

Latitude

Longitude

Shipyard 0: Sample Control sample

CEM II 42.5R

5/10 et 12.5/25

Crushed

Variable

Manual

-

-

Shipyard 1

CEM II 42.5

3.15/ 12.5

Congo River

Variable

Manual

4˚17'44.0"S

15˚14'35.7"E

Shipyard 2

CEM II 42.5R

5/25

Concassé

Variable

Manual

4˚17'02.8"S

15˚15'20.6"E

Shipyard 3

CEM II 32.5R

5/16 et 12.5/25

Congo River

Variable

Manual

4˚17'41.1"S

15˚15'20.5"E

Shipyard 4

CEM II 32.5R

5/31.5

Congo River

Variable

Manual + adjuvant

4˚14'55.3’’S

15˚16'23.5"E

Shipyard 5

CEM II 42.5R

5/31.5

Djiri quarry

Variable

Manual

4˚14'56.4"S

15˚16'13.8"E

Shipyard 6

CEM II 42.5R

5/25

Congo River

Variable

Manual

4˚14'57.1"S

15˚16'13.5"E

Shipyard 7

CEM II 42.5R

5/25

Djiri quarry

Variable

concrete mixer

4˚15'29.0"S

15˚15'54.4"E

Shipyard 8

CEM II 42.5R

3.15/10 et 12.5/25

Congo River

Variable

concrete mixer + adjuvant

4˚16'28.5"S

15˚17'10.1"E