# Effect of Calined Marble Powder and Magnetized Water on the Performance of Cement-Based Composites
## 2 Experimental Details
### Preparation of Mortar Mixtures and Test Procedures  
Cement-based composites were prepared in accordance with EN 196-1 [27]. The water-to-binder ratio in the mixtures was kept constant at 0.5. The amounts of water, binder, and sand used were 225 g, 450 g, and 1350 g, respectively. RMP and CMP were substituted for PC at rates of 5%, 10%, 15%, 20%, and 25%. The mixture of compositions and codes of the cement-based composites are presented in Table 2. After the materials were mixed in a mixer, the mortar mixtures were placed into molds measuring 40 \(\times\) 40 \(\times\) 160 mm in two layers. Each layer was shaken on a vibration table to remove air bubbles from the mortar. The samples were demolded after 24 h and cured in a water pool at a temperature of 20 \(\pm\) 1 \({}^{\circ}\)C for 3, 7, and 28 days. Figure 2: Schematic view of the magnetized water generating mechanism. The setting times of cement pastes containing RMP and CMP, prepared with both TW and MW, were measured following the EN 196-3 [29] standard. The flow diameters of the fresh mortars were assessed according to the EN 12350-5 [30] standard. This test was performed using a flow table apparatus. At the conclusion of the experiment, the flow diameter of the mortar was measured in both directions, and the average of these two values was calculated. The samples, cured for 3, 7, and 28 days, were then tested for flexural and compressive strength at the end of the curing periods. The flexural and compressive strength tests were performed on samples measuring 40 \(\times\) 40 \(\times\) 160 mm, in accordance with the EN 196-1 [27] standard. The flexural strength test was conducted on three samples, and the average of the results was taken as the final flexural strength. After the flexural strength test, the samples were split into two equal parts, and compressive strength tests were performed on these halves. The average of six samples was taken as the final compressive strength. The physical properties of the mortar samples that completed the 28-day curing period, including unit volume weight, water absorption, and porosity ratio, were determined in accordance with the EN 12390-7 [31] standard. Measurements were performed on three samples, and the average of these results was taken as the final value. One of the most commonly used non-destructive testing methods to evaluate the quality of cement-based composites is the measurement of ultrasonic wave propagation velocity [32,33]. The _UPV_ test on the samples was conducted using a Proceq Pundit Lab+ device with an accuracy of 0.10 s, in accordance with the EN 12504-4 [34] standard. The classification of concrete quality based on _UPV_ velocity is shown in Table 3[35,36]. Figure 3 illustrates the flowchart of the mixture design and testing procedures conducted within the scope of the study. After 28 days of curing period, microstructural analysis of R0/TW (Ref), R20/TW, C0/MW (Ref), and C20/MW-coded mortars were performed by scanning electron microscopy (SEM). Zeiss EVO 40 XP SEM device was used for microstructure analysis.