Fluvial sediments need to be periodically dredged from waterways. At the same time, the building sector has to find high-volume alternatives to the extraction of non-renewable mineral resources. In this context, recent research has shown the benefit of reusing calcined sediments as supplementary cementitious materials. On a different note, this study examines the hydration and performance of blends of calcined fluvial sediment with low amounts (10 to 30 wt%) of hydrated lime with the aim of keeping the carbon footprint of the binder the lowest as possible. The effect of different curing conditions (moist curing at 20 °C or 50 °C and dry curing at 65%RH) is studied on compressive strength, reaction kinetics (fixed lime by TGA and heat of hydration), reaction products (XRD), microstructure (SEM) and porosity (MIP). The outcomes of the study revealed that heat curing for 3 days and 10 wt% of lime results in satisfactory strength development for the design of bio-based concretes (compressive strength of 9 MPa). Furthermore, the highest compressive strength of 17.5 MPa was achieved at 110 days at 20 °C for the mix with 20 wt% of lime. The amount of unreacted lime was found to be the highest for the mix including 30 wt% of lime for which the degree of reaction of lime at 90 days was around 0.7 for both curing temperatures. Under dry curing, a large part of the initially available lime was carbonated and some reaction products underwent carbonation leading to very low strength by 110 days.

河流沉积物需要定期从水道中疏浚。与此同时，建筑行业必须寻找大量替代开采不可再生矿产资源的方法。在这种情况下，最近的研究表明，再利用煅烧沉积物作为补充胶凝材料的好处。另一方面，本研究检查了煅烧河流沉积物与少量（10 至 30 wt%）熟石灰的混合物的水合作用和性能，目的是使粘合剂的碳足迹尽可能低。研究了不同固化条件（20°C 或 50°C 湿固化和 65%RH 干固化）对抗压强度、反应动力学（TGA 固化石灰和水化热）、反应产物 (XRD)、微观结构 (SEM) 和孔隙率 (MIP)。研究结果表明，热固化 3 天和 10 wt% 的石灰可以为生物基混凝土的设计（抗压强度为 9 MPa）带来令人满意的强度发展。此外，对于与 20 wt% 的石灰的混合物，在 20 °C 下 110 天达到了 17.5 MPa 的最高抗压强度。发现未反应石灰的量对于包括 30 wt% 石灰的混合物是最高的，对于这两种固化温度，石灰在 90 天的反应程度约为 0.7。在干固化下，大部分初始可用的石灰被碳化，一些反应产物经历碳化，导致 110 天的强度非常低。对于与 20 wt% 的石灰的混合物，在 20 °C 下 110 天达到了 17.5 MPa 的最高抗压强度。发现未反应石灰的量对于包括 30 wt% 石灰的混合物是最高的，对于这两种固化温度，石灰在 90 天的反应程度约为 0.7。在干固化下，大部分初始可用的石灰被碳化，一些反应产物经历碳化，导致 110 天的强度非常低。对于与 20 wt% 的石灰的混合物，在 20 °C 下 110 天达到了 17.5 MPa 的最高抗压强度。发现未反应石灰的量对于包括 30 wt% 石灰的混合物是最高的，对于这两种固化温度，石灰在 90 天的反应程度约为 0.7。在干固化下，大部分初始可用的石灰被碳化，一些反应产物经历碳化，导致 110 天的强度非常低。