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研究了不同细度与掺量的沸石对赤泥水泥砂浆水化28d强度及放射性的影响。结果表明,利用沸石来取代砂可以有效屏蔽赤泥水泥砂浆的放射性,但同时会影响到砂浆的28d抗压、抗折强度;当粒度相同时,屏蔽物沸石的掺量越高,放射性的屏蔽效果越好;当掺量相同时,屏蔽物沸石的粒度越小,放射性的屏蔽效果越好。当0.2mm以下沸石取代砂量达到15%时,放射性屏蔽率高达22.7%,此时试块的内照射指数为0.15,外照射指数为0.24,放射性总比活度降低为210.3Bq/kg。
The effects of zeolites with different fineness and dosage on the strength and radioactivity of red mud mortar during 28 days of hydration were studied. The results show that the use of zeolite to replace sand can effectively shield the radioactivity of red mud cement mortar, but at the same time it will affect the 28d compressive strength and flexural strength of mortar. When the particle size is the same, the higher the content of zeolite, The better the effect; when the same dosage, the smaller the particle size of the zeolite zeolite, the better the radioactive shielding effect. When the amount of zeolite to replace zeolite below 0.2mm to replace 15%, the radioactive shielding rate as high as 22.7%, the test block internal irradiation index of 0.15, external irradiation index of 0.24, radioactive total activity was reduced to 210.3Bq / kg.