页岩烧结砖没有放射性，具有良好的透水性、保水性，是清洁安全的环保产品。
The tile sintered from shale is a clean and safe environmental product with good water permeability and water locking performance without radioactivity.
研究结果表明：用煤矸石和适量固化剂制成的非烧结砖经过28d自然养护后，其质量和放射性均符合国家有关标准。
The practice show that quality and radioactivity of the product, which is made by gangue and some condensing agent, can meet related national regulation after 28 days' natural maintenance.
目的测定居室内装饰彩釉砖的放射性水平并制定其限值。
Objective to lay down the radiological limits to glazed tiles decorated in houses.
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