The “greening effect” refers to hardened concrete containing Granulated Blast-Furnace Slag (GBFS) that displays a vivid blue-green color after removal of formwork. This temporary coloration effect, which fades within a few days to weeks, has raised concerns about its potential impact on the environment. Three types of leaching tests were conducted to assess different potential release scenarios: a sprinkling test, a static monolith tank test and a batch test on crushed samples. Slag content was linked to a higher release of sulfur anions in the leachates, in the form of sulfides, thiosulfates and sulfates. Most of these anions came from the GBFS, where sulfur is mainly in the form of sulfides with thiosulfates and sulfates as the main products of sulfide oxidation. Sulfate levels, however, were lower than threshold limit values for both inert waste and alternate materials reused in road construction. Moreover, no chromium, or other hazardous metals, were detected in the leachates.

“绿化效果”是指包含粒状高炉矿渣（GBFS）的硬化混凝土，在去除模板后，其呈现生动的蓝绿色。这种暂时的着色效果会在几天到几周内消失，这引起了人们对其潜在环境影响的担忧。进行了三种类型的浸出测试，以评估不同的潜在释放方案：洒水测试，静态整料罐测试和压碎样品的分批测试。矿渣含量与浸出液中硫阴离子的更高释放有关，硫离子以硫化物，硫代硫酸盐和硫酸盐的形式存在。这些阴离子大多数来自GBFS，其中硫主要以硫化物的形式存在，硫代硫酸盐和硫酸盐是硫化物氧化的主要产物。但是，硫酸盐含量 均低于惰性废物和在道路建设中重复使用的替代材料的阈值限值。此外，在渗滤液中未检测到铬或其他有害金属。