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Average tensile strength and brittleness of concrete
| Properties | concretes | |||||
|---|---|---|---|---|---|---|
| B 058 | G 058 | D 058 | K 058 | Ż 058 | ||
| experimental values | ||||||
| splitting tensile strength | fctm,sp, MPa | 3.25 | 2.75 | 3.36 | 3.24 | 2.87 |
| axial tensile strength | fctm,ax, MPa | 2.93 | 2.48 | 3.02 | 2.92 | 2.58 |
| brittleness fctm,ax/fcm | 0.062 | 0.067 | 0.067 | 0.063 | 0.062 | |
| strength class | C40/50 | C30/37 | C40/50 | C40/50 | C35/45 | |
| axial tensile strength depending on the class according to EC2, MPa | 3.5 | 2.9 | 3.5 | 3.5 | 3.2 | |
| brittleness fctm,ax/fcm | 0.073 | 0.076 | 0.073 | 0.073 | 0.074 | |
Tests results of the applied coarse aggregates
| properties of aggregates | type and fraction of aggregate | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| basalt | granite | dolomite | quartzite | gravel | ||||||
| 2÷8 mm | 8÷16 mm | 2÷8 mm | 8÷16 mm | 2÷8 mm | 8÷16 mm | 2÷8 mm | 8÷16 mm | 2÷8 mm | 8÷16 mm | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| ACV, % | 3.9 | 4.0 | 14.5 | 15.3 | 6.6 | 7.0 | 6.5 | 4.3 | 6.1 | 5.9 |
| limit value according to PN-86/B-06712 | to 8% (brand 50) | to 16% (brand 20) | to 8% (brand 50) | to 12% (brand 30) | to 12% (brand 30) | |||||
| absorption by weight, % | 1.0 | 0.6 | 1.1 | 0.7 | 0.8 | 0.7 | 0.9 | 0.5 | 1.1 | 0.9 |
| limit value according to PN-86/B-06712 | to 0.8% | to 3.0% | to 2.0% | to 3.0% | to 1.0% | |||||
| content of irregular grains, % | 8.1 | 7.9 | 8.5 | 8.2 | 9.2 | 8.5 | 8.2 | 5.6 | 9.8 | 6.5 |
| limit value according to PN-86/B-06712 | to 10% | to 25% | to 10% | to 20% | to 20% | |||||
| content of mineral dust, % | 0.5 | 0.3 | 0.9 | 0.3 | 0.4 | 0.3 | 1.9 | 1.1 | 0.3 | 0.2 |
| limit value according to PN-86/B-06712 | to 1.0% | to 3.0% | to 1.5% | to 1.5% | to 1.5% | |||||
| bulk density, kg/dm3 | 3.00 | 2.64 | 2.81 | 2.66 | 2.66 | |||||
| specific density, kg/dm3 | 3.06 | 2.69 | 2.89 | 2.71 | 2.76 | |||||
| total porosity, % | 1.96 | 1.86 | 2.77 | 1.85 | 3.62 | |||||
Compressive strength, strain properties of concretes
| properties | concretes | ||||
|---|---|---|---|---|---|
| B 058 | G 058 | D 058 | K 058 | Ż 058 | |
| experimental values | |||||
| fcm,cyl MPa | 47.5 | 36.9 | 44.9 | 46.4 | 41.8 |
| strength class [20] | C40/50 | C30/37 | C40/50 | C40/50 | C35/45 |
| εc1m, ‰ | 2.22 | 2.48 | 2.10 | 2.65 | 2.12 |
| νcm | 0.20 | 0.18 | 0.21 | 0.17 | 0.20 |
| Ecm, GPa | 34.8 | 25.0 | 35.3 | 28.7 | 31.0 |
| standard values | |||||
| εc1,PN, ‰ | 2.30 | 2.20 | 2.30 | 2.30 | 2.25 |
| νcPN | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
| EcmPN, GPa | 42.0 | 32.0 | 35.0 | 35.0 | 34.0 |
Composition of concrete mixtures
| concrete components | concretes designation (type of coarse aggregate) | ||||
|---|---|---|---|---|---|
| B 058 (basalt) | G 058 (granite) | D 058 (dolomite) | K 058 (quartzite) | Ż 058 (gravel) | |
| cement, kg/m3 | 325 | ||||
| sand, kg/m3 | 676 | ||||
| coarse aggregate, kg/m3 | 1274 | 1166 | 1245 | 1175 | 1166 |
| water, kg/m3 | 189 | ||||
Properties of solid rocks [1], [2], [9]
| properties | type of rock | ||||
|---|---|---|---|---|---|
| basalt (Gracze) | granite (Graniczna) | dolomite (Laskowa Góra) | quartzite (Wiśniówka) | gravel (Suwałki) granite/limestone/ dolomite | |
| compression strength, MPa | 142.3 | 115.4 | 121.5 | 221.5 | 90-240/40-180/60-180 |
| density, kg/dm3 | 3.11 | 2.67 | 2.84 | 2.68 | 2.3-2.8/2.6-2.9/2.4-2.8 |
| porosity, % | 1.70 | 1.50 | 1.36 | 1.70 | ≤1.0/ ≤3.0/ ≤4.0 |
| absorption, % | 0.49 | 0.46 | 0.35 | 0.30 | 0.2-0.5/0.3-1.5/0.3-2.0 |
| cleavage | indistinct | very good | – | – | – |
| abrasion according to Böhme, cm | 0.21 | 0.18 | 0.47 | 0.13 | 0.1-0.3/0.2-2.0/0.3-1.4 |