Table 1
Mixing of the EVA PMCSAC mortar samples.
| Number of samples | CSAC (g) | Sand (g) | EVA content (%) | Water (g) | Water reducer (%) |
|---|---|---|---|---|---|
| A | 450 | 1,350 | 0 | 225 | 0.5 |
| B | 450 | 1,350 | 1.0 | 225 | 0.4 |
| C | 450 | 1,350 | 2.0 | 225 | 0.3 |
| D | 450 | 1,350 | 3.0 | 225 | 0.2 |
Figure 1
Preparation and curing of EVA PMCSAC mortar specimens.
Figure 2
Thermographic images of the start of the fire. Resistance to direct fire test and temperature were measured using an infrared thermometer.
Figure 3
UPV values of EVA PMCSAC mortars.
Table 2
Compressive and flexural strength analysis of EVA-enhanced CSAC mortars following direct fire exposure.
| Sample group | Mean compressive strength | Std. Dev. compressive | Confidence interval | Mean flexural strength | Std. Dev. flexural | Flexural confidence interval |
|---|---|---|---|---|---|---|
| 0% EVA (Control, Sample A) | 15.2585 | 2.2574 | (12.9605, 17.5565) | 4.228 | 0.5764 | (3.663, 4.793) |
| 1% EVA (Sample B) | 11.8875 | 2.7735 | (9.5886, 14.1864) | 3.2668 | 0.1638 | (3.2516, 3.2804) |
| 2% EVA (Sample C) | 13.1567 | 3.2475 | (10.4839, 15.8295) | 5.6865 | 0.8920 | (4.6680, 6.7040) |
| 3% EVA (Sample D) | 10.7400 | 3.3218 | (8.0790, 13.4010) | 3.3040 | 0.2213 | (3.2281, 3.3799) |
Figure 4
Flexural and compressive strength of the EVA PMCSAC mortars after direct fire exposure.
Figure 5
Thermal characteristics of the EVA PMCSAC mortars.
Figure 6
Water saturation of the EVA PMCSAC after direct fire exposure.
Figure 7
(a) Log differential intrusion volume in mL/g and (b) the cumulative intrusion volume.
Table 3
Summary of the MIP testing of EVA PMCSAC mortars.
| Group | Average values parameters | |||
|---|---|---|---|---|
| Total intrusion volume (mL/g) | Total pore area (m2/g) | Median pore diameter (nm) | Tortuosity (%) | |
| 0% EVA added | 0.147 | 10.87 | 13.22 | 3.00 |
| 1% EVA added | 0.170 | 9.26 | 13.36 | 3.48 |
| 2% EVA added | 0.171 | 10.69 | 11.36 | 17.20 |
| 3% EVA added | 0.170 | 9.39 | 10.36 | 3.72 |
Figure 8
SEM observations of different EVA PMCSAC mortars.