Compressive Strength of Hardened Concrete Using Schmidt Hammer

5. Results:
Compressive Strength of Concrete Structures
Using Schmidt Hammer

DATA AND CALCULATION SHEET

Sample Identification: R14 floor

Description:

Sample age at test: Element type:

Application Direction | | | | Rebound number readings | 26 | 29 | 24 | 32 | 26 | | 31 | 32 | 34 | 22 | 30 | Average Rebound Number | (1) 29 | Estimated compressive strength (MPa) | (2) 28 MPa |

Compressive Strength of Cube Concrete Specimens

DATA AND CALCULATION SHEET

Sample Identification: R14 cube

Description:

Sample | 1 | Width (mm) | 103.5 | 99.3 | Depth (mm) | 99.4 | 101.1 | Average Width W (mm) | (3) 101.4 | Average Depth D (mm) | (4) 100.3 | Cross section area A (mm2) = WxD | (5) 1.017×104 | Height L (mm) | 100.1 | Sample mass (kg) | 2.39 | Density (kg/m3) | (6) 2.35×103 | Compression failure load F (kN) | 208.8 | Compressive strength (MPa) | (7) 2.053×101 |

Compressive _ Strength  F A

Remarks:

Tested by:

Date:

-calculations:
1- average=1Ni=1Nxi = 26+29+24+32+26+31+32+34+22+3010 =29
2-

3- ωavg= 103.5+99.32 4- davg = 99.4+101.12 =101.4 mm = 100.3 mm
5- Area=ω×d 6- D= mV =101.4×100.3 =1.017×104 mm2 = 2.35 × 103 kg/m3
= 2.39kg(101.4mm×100.3mm×100.1mm)×1m3109mm3

7- compressive strngth= FA =208.8kN×103NkN1.017×104mm2×m2106mm2×MPa106Pa =2.053×101MPa

6. Discussion of Results:
-Non-Distractive