Abstract
The mortar board was prepared with the content of reduced iron powder, thickness and shielding fabric as variables. The results showed that appropriate content of reduced iron powder could improve the shielding efficiency of mortar, and the peak shielding efficiency of 10mm thick specimens with a dosage of 300kg/m3 reached 16.9db and the 20mm-thick specimens reached 17.1db. The 10mm-thick specimens with shielding fabric reached 73.5db, and the 20mm-thick specimens reached 59.3db
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