Page 9 - 2018 DIGITAL BROCHURE

Typical average values in MPa
Mortar Time periods Compressive strength Flexible strength

CHARACTERISTIC STRENgTHS 15 min 5 1
In accordance with AFNOR Standard 1 h 7 1.5
EN 196-1, using a standardised mix : 3 h 9 2
• Cement/sand ratio = 1/2 (Sand 1 day 16 3
complying with AFNOR Standard) ; 7 days 27 3.5
Water/cement ratio = 0.40
28 days 51 6
91 days 70 7
6 months 75 8
SHRINkAgE 1 year 83 9
In accordance with AFNOR Standard EN Steady increase in Compressive strength over 1 year and thereafter
196-1, using a standardised mix :
• Cement/sand ratio = 1/2 (Sand complying with AFNOR Standard) ; Water/cement ratio = 0.40.
• At end of set : demoulding and initial measurements taken.
• Shrinkage 300 - 500 μ measured between end of set and 28 days.

Cast concrete - CEBTP TESTS 3114/6/883
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On cast concrete: Cement content : 590 kg/m of concrete placed.
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Water/cement ratio = 0.39. Aggregate grading = 0/20 mm.
Setting retarded by addition of citric acid (0.6%) and plasticizer (1%). At 20°C, standard slump = 10.5 cm.
Compressive Strength
Time periods 3 h 24 h 7 days 28 days 90 days
Typical average values in MPa 12 15 20 39 57
Shrinkage : 323 μ at 28 days
SHOTCRETE

Compressive strength of a 10 x 10 cm cube
NATCEM Ambient (average strength of 3 cubes in MPa)
cement factor temp. °C
3 h 5 h 24 h 7 days 28 days 90 days
350 kg/m 3 25 9.5 n.m.* 21 n.m.* 39 n.m.*
450 kg/m 3 13 15.8 18.3 31 33.7 56.3 57.5
*n.m. : not measured
HEAT OF HyDRATION
Measured using a Langavant calorimeter in accordance with NF P15-436, modified as per NF P15-314, the
heat of hydration lies in the range : 70 - 150 J/g after 1 hr, or 17 - 36 cal/g after 1 hr.
SuITABILITy FOR FOOD INDuSTRy APPLICATIONS
NATCEM may be used in food industry facilities; it is fully endorsed by CREPEC Ville de Paris Approval 92
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MAT 036 of 04/05/93.
Result of relevant analyses : • Quick screening test : Satisfactory
• Test for cytotoxicity : Satisfactory
• Analytical fine screening test : Satisfactory
3 CEBTP = Centre d’Etudes pour le Batiment et let Travaux Publics (French Building Research Centre)
4 CRECEP = Centre de Recherche et de Controle des Eaux de Paris (Paris Water Research and Testing Unit)

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