Mitigation of workplace radon gas concentration using high-performance epoxy resin coating

The indoor radon gas released from concrete was measured using a 0.65 × 0.65 × 0.65 m fabricated concrete slab room, simulating a workplace. The indoor radon gas concentration was monitored, and the remediation method was examined. Radon concentrations were monitored using Radon Monitor Model 1023 from Sun Nuclear. Results show that average radon concentrations reached 111 Bq.m–3 before remediation, beyond the World Health Organization’s acceptable limit of 100 Bq.m–3. Hence, two layers of high-performance waterborne epoxy resin TRU-GLAZE-WB 4030 coating were applied, reducing the radon concentration average to an acceptable level of 14.8 Bq.m–3. Interestingly, the indoor radon concentrations were measured two months after applying the remediation and were found to be stable and within acceptable levels.