PSI - Issue 23

Aneta Nowak-Michta et al. / Procedia Structural Integrity 23 (2019) 77–82 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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2.5. Tests results

The test results of concrete mixes are given in the Table 3, and the average tests results of concretes are shown in the Table 4.

Table 3. Test results of concrete mixes. Property/symbol S1

S2 70

S3

S4

SN1

SN2 110 2515

SN3 180 2543

SN4 210 2570

Slump (mm) Density (kg/m 3 )

30

170 2613

210 2610

10

2567

2593

2470

Vp (%)

2.9

1.7

1.2

1.4

6.0

4.6

3.8

2.7

Table 4. Test results of concretes. Property/symbol S1

S2

S3

S4

SN1 49.3 2511 4.66 43.46 0.122 2.50

SN2 49.5 2498 3.61 39.98 0.149 1.69

SN3 52.5 2501 3.95 31.47 0.181 1.84

SN4 56.0 2525 3.66 17.45 0.338 1.00

f c (MPa) D (kg/m 3 ) α (mm -1 ) L (mm) A 300 (%) A (%)

51.7 2532 3.36 16.09 0.382 0.88

58.6 2586 2.61 12.03 0.573 0.55

59.0 2556 2.62 11.89 0.585 0.43

59.0 2567 1.76 10.30 0.820 0.23

Figure 1 shows the average D in the NAEC and AEC, while in Figure 2 the average f c in the NAEC and AEC. The densities of NAEC are in the range of 2532-2586 kg/m 3 , while the densities of AEC are lower and range from 2498 to 2525 kg/m 3 (Fig.1). The compressive strength (f c ) of the control concrete (S1) was 51.7MPa; the remaining NAEC had comparable strengths of 58.6-59.0 MPa. Strength of AEC without SP (SN1) was 49.3 MPa and increased as SP content increased in the range of 49.5-56.0 MPa (Fig.2).

Fig. 1. D in NAEC and AEC.

Fig. 2. f c in NAEC and AEC.

3. Analysis of test results

Density indicators (I D ) and strength change (  f c ) in NAEC and AEC are presented in Fig. 3 and 4, respectively. I D and  f c were calculated using formulas (1) and (2) in relation to the density and compressive strength of the control concrete, marked with the symbol S1 (without AEA and without SP).