The rise in industrialization and infrastructural development is increasing leading to a constant need for construction materials; however, some of these materials continue to pose a problem to the concerned environments. There is a need to search for materials that will reduce environmental degradation and ensure sustainability. Natural pozzolanic materials possess certain characteristics such that their use in mortar and cement production could reduce the emission of carbon dioxide (CO₂) due to the transformation of limestone (CaCO₃) into lime for production of Portland cements. Colossal deposits of volcanic pozzolan outcrop in the Njimbouot II locality and the characterization of those materials is vital in deciphering their suitability in cement production as a construction material for sustainable development. Grinding is the only treatment performed on pozzolans in order to increase their specific surface area and reactivity. The rate of substitution of cement with pozzolan in the samples varied from 0%, 10%, and 15% to 25%. Mechanical tests were carried out after 7, 28 and 90 days on mortar specimens (4נ4 16 cm³). Results revealed the presence of amorphous phases. The activity index obtained was approximately 75% and the lapilli and volcanic ash in this area are classified as pozzolans (classification ASTM C618). Regardless of the rate of substitution, the mechanical proprieties of mortars are observed to increase with age. The compressive strength values changed from 33.72 to 52.5 MPa while the flexural strength evolved from 5.62 to 8.29 MPa revealing that the Njimbouot II Pozzolan are advantageous in the manufacture of ecological cements.

工业化和基础设施发展的兴起日益增长，导致对建筑材料的不断需求。然而，这些材料中的一些继续对相关环境造成问题。需要寻找可以减少环境退化并确保可持续性的材料。天然火山灰材料具有使得它们在砂浆和水泥生产中使用可以减少二氧化碳的（CO排放某些特性₂）由于石灰石的转化，碳酸钙（CaCO ₃）制成石灰，以生产波特兰水泥。恩吉姆布特二世地区火山火山灰露头的大量沉积物以及这些材料的特性对于破译它们在水泥生产中作为可持续发展的建筑材料的适用性至关重要。研磨是对火山灰进行的唯一处理，以增加其比表面积和反应性。样品中火山灰对水泥的替代率从0％，10％和15％到25％不等。在7、28和90天后对灰浆样本（4נ4 16 cm ³）。结果表明存在非晶相。获得的活性指数约为75％，该区域的青金石和火山灰归类为火山灰（分类为ASTM C618）。无论取代率如何，观察到砂浆的机械性能会随着使用时间的增长而增加。抗压强度值从33.72 MPa变为52.5 MPa，而抗折强度从5.62 MPa变为8.29 MPa，这表明Njimbouot II Pozzolan在生产生态水泥方面具有优势。