Faculty of Engineering and Architecture, Department of Civil Engineering, Kastamonu University, Kuzeykent, Kastamonu, Turkey.
Environ Monit Assess. 2019 Aug 12;191(9):560. doi: 10.1007/s10661-019-7741-4.
The possibility of disposing of fly ash (FA) and blast furnace slag (BFS), which are environmental wastes, by using them as substitutes in portland cement was examined in this study. Portland cement (CEM I), FA, BFS, CEN standard sand, and water were used in the production of mortars. Blended cements were obtained by substituting FA, BFS, and a mixture of FA and BFS (FABFS) at 5.0%, 10.0%, 15.0%, and 20.0% ratios in portland cement. Physical (Blaine area, density, initial and final setting time, and fineness), mechanical (flexural strength and compressive strength), radiation permeability (determination of linear absorption coefficient) and high-temperature experiments were performed on the FA, BFS, and FABFS samples. Mortar prism samples with a size of 40 × 40 × 160 mm were obtained using these cements. The samples were exposed to five temperatures: 20, 150, 300, 700, and 900 °C. Mortar samples kept at 20 °C were used as references. A total of 390 samples were studied under air cooling (spontaneous cooling at 20 ± 2 °C in laboratory environment). After the mortar samples reached at room temperature, flexural strength and compressive strength tests were carried out on the 28th and 90th days. The test results showed that FA, BFS, and FABFS can be used as pozzolanic additives in cement mortars both alone and together and can be applied in buildings with a high risk of fire up to certain temperature values. The sample with the highest linear absorption coefficient was the FABFS sample, and as the sample with the lowest radiation permeability, it was determined to be appropriate for use in buildings that are exposed to radiation effects.
本研究探讨了利用粉煤灰（FA）和高炉矿渣（BFS）作为波特兰水泥替代物来处理这些环境废物的可能性。在生产砂浆时，使用了波特兰水泥（CEM I）、FA、BFS、CEN 标准砂和水。通过在波特兰水泥中以 5.0%、10.0%、15.0%和 20.0%的比例替代 FA、BFS 和 FA 和 BFS 的混合物（FABFS），获得了掺合水泥。对 FA、BFS 和 FABFS 样品进行了物理性能（比表面积、密度、初凝和终凝时间、细度）、机械性能（弯曲强度和抗压强度）、辐射渗透性（线性吸收系数的测定）和高温实验。使用这些水泥获得了尺寸为 40×40×160mm 的砂浆棱柱体样品。将这些样品暴露在五个温度下：20、150、300、700 和 900°C。将保持在 20°C 的砂浆样品用作参考。在空气冷却下（在实验室环境中 20±2°C 下自然冷却）共研究了 390 个样品。在砂浆样品达到室温后，在第 28 天和第 90 天进行了弯曲强度和抗压强度测试。测试结果表明，FA、BFS 和 FABFS 可以单独或组合用作水泥砂浆的火山灰添加剂，并且可以在一定温度范围内应用于火灾风险较高的建筑物中。线性吸收系数最高的样品是 FABFS 样品，而作为辐射渗透性最低的样品，它被确定适合用于暴露在辐射影响下的建筑物。
