This study is the first attempt to investigate the possibility of incorporating nano-activated carbon (nAC), prepared from residual biomass of olive trees, on the properties of alkali-activated slag (AAS) pastes. After suitable preparation of nAC, it was added into AAS pastes at various levels starting from 0.5 to 3.5, by weight. The results of workability, compressive strength, total porosity and drying shrinkage were measured. Different techniques such as X-ray diffraction (XRD), thermogravimetric analysis (TGA) and its derivative (DTG), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) were used to identify the hydration products and the microstructural development of the AAS pastes with/without nAC. The results showed a negative effect of nAC on the workability of the mixtures. The incorporation of 1.5% nAC showed the highest compressive strength, the lowest total porosity and drying shrinkage. The incorporation of 3.5% nAC led to a reduction in the compressive strength and an increase in the total porosity and drying shrinkage. It can be concluded that the incorporation of suitable ratios of nAC can be beneficially used to resolve one of the main problems of AAS (i.e. drying shrinkage). Thus, the addition of nAC could enhance the probability of utilizing AAS as a good alternative to Portland cement.

这项研究是首次尝试研究将由橄榄树的残留生物量制备的纳米活性炭（nAC）掺入碱活化矿渣（AAS）浆料的性能的可能性。适当制备nAC后，将其按重量从0.5到3.5的各种含量添加到AAS浆料中。测量了可加工性，抗压强度，总孔隙率和干燥收缩率的结果。使用各种技术（例如X射线衍射（XRD），热重分析（TGA）及其衍生物（DTG），傅里叶变换红外（FTIR）光谱和扫描电子显微镜（SEM）来鉴定水合产物有/无nAC的AAS糊的微观结构发展。结果表明，nAC对混合物的可加工性有负面影响。掺入1.5％的nAC表现出最高的抗压强度，最低的总孔隙率和干燥收缩率。掺入3.5％的nAC导致抗压强度降低，总孔隙率和干燥收缩率增加。可以得出结论，适当比例的nAC的掺入可以有益地用于解决AAS的主要问题之一（即干燥收缩）。因此，添加nAC可以提高利用AAS替代波特兰水泥的可能性。