In this study, the use of colemanite (C) and colemanite concentrator wastes (CW) in self-compacting concrete (SCC) mixtures was investigated. It is known that additives containing boron minerals have a retarding effect on cement hydration. From this viewpoint, boron minerals containing various concentrations of C and CW were used and their effects on fresh concrete properties were investigated. In this context, single point tests and rheometer tests were applied. In addition, the setting times and unit weights of the samples were measured, and the compressive strengths at 7, 28 and 90 days were determined. The hydration developments of the samples were investigated by TGA and SEM investigations. The use of C and CW generally negatively affected the compressive strength, while the use of 1% C provided a slightly higher strength than the reference at the end of 90 days. The degree of hydration data obtained using TGA and the microstructural investigations via SEM supported these results. As a result of fresh state tests, it has been observed that the use of C improves and maintains the fresh properties and rheological parameters of self-compacting concrete, while the use of CW generally had the opposite effect. It is thought that this is due to the negative effect of the clay minerals in CW's composition and the fact that the B₂O₃ amount in its content is less when compared to the C.

在这项研究中，研究了在自密实混凝土 (SCC) 混合物中使用硬硼钙石 (C) 和硬硼钙石选矿废料 (CW)。已知含有硼矿物的添加剂对水泥水化具有延缓作用。从这个角度来看，使用了含有不同浓度 C 和 CW 的硼矿物，并研究了它们对新拌混凝土性能的影响。在这种情况下，应用了单点测试和流变仪测试。此外，还测量了样品的凝结时间和单位重量，并测定了 7、28 和 90 天的抗压强度。通过 TGA 和 SEM 调查研究了样品的水合作用发展。C 和 CW 的使用通常会对抗压强度产生负面影响，而使用 1% C 在 90 天结束时提供的强度略高于参考。使用 TGA 获得的水合程度数据和通过 SEM 进行的微观结构研究支持这些结果。作为新鲜状态测试的结果，已经观察到使用 C 可以改善和保持自密实混凝土的新鲜性能和流变参数，而使用 CW 通常具有相反的效果。据认为，这是由于 CW 成分中粘土矿物的负面影响以及 B 据观察，C 的使用改善并保持了自密实混凝土的新鲜性能和流变参数，而 CW 的使用通常具有相反的效果。据认为，这是由于 CW 成分中粘土矿物的负面影响以及 B 据观察，C 的使用改善并保持了自密实混凝土的新鲜性能和流变参数，而 CW 的使用通常具有相反的效果。据认为，这是由于 CW 成分中粘土矿物的负面影响以及 B₂ O ₃的含量比C少。