This study proposes the application of basalt powder (BP) as a supplementary cementitious material (SCM) in cement formulations for Carbon Capture and Storage (CCS) wells. From experimental results, we identified that the BP can be characterized as a filled-pozzolanic SCM, presenting low pozzolanic activity, large inert fraction, and particle size significantly smaller than class G cement. Formulations with low basalt powder (≤ 0.5 wt.%) content presented the greatest potential for application in CCS wells since they are more resistant to CO₂ degradation, showing low porosity and suitable mechanical properties, as evidenced in carbonation tests. Due to basalt powder characteristics, we conclude that the increase in the chemical resistance of the cement formulation with low BP content is due to the reduction of both the porosity and permeability as a result of filling of empty spaces and the refinement of the porous cement network, allied to the low reduction of the alkaline reserve of portlandite. The combination of these features increases the material's resistance to fluid intrusion, reduces the progress of the CO₂ degradation front, and preserves the cement matrix's ability to delay the reaction of acid gases.

这项研究提出了将玄武岩粉（BP）作为补充胶凝材料（SCM）在碳捕集与封存（CCS）井的水泥配方中的应用。从实验结果中，我们确定了BP可以表征为填充的火山灰SCM，具有较低的火山灰活性，较大的惰性分数和明显小于G级水泥的粒径。玄武岩粉含量低（≤0.5 wt。％）的配方具有更强的CO ₂抵抗力，因此在CCS井中具有最大的应用潜力碳化测试表明，这种材料分解后显示出低孔隙率和合适的机械性能。由于玄武岩粉末的特性，我们得出结论，低BP含量的水泥配方的耐化学性的提高是由于空洞的填充和多孔水泥网的细化导致孔隙率和渗透率的降低，这与减少波特兰石的碱性储量有关。这些特征的组合增加了材料对流体侵入的抵抗力，减少了CO ₂降解前沿的进程，并保留了水泥基体延迟酸性气体反应的能力。