The present paper discusses experimental results obtained on several mortars prepared using a commercial type1 OPC cement, a commercial limestone aggregate with maximum particles dimension below 5 mm, superplasticizer and water. Different amounts of a waste silica sand, in form of loose powder, derived from the industrial production of refractory blocks, were added to the above basic components. Several additional samples were also prepared using same basic commercial components added by different amounts of a fine limestone filler. This latter set of compositions was used to prepare samples to be used as reference materials. Waste silica sand and fine limestone filler were used as received from their producer. During preparation, pastes containing silica sand showed better workability compared to all the other blended components. All hydrated materials displayed fair compressive strength and low water absorption after curing, but those containing silica sand showed the best mechanical performances due to their low residual porosity and to the pozzolanic reaction which could enable application for the production of structures in direct contact with water or aggressive environments such as sewers or tanks suitable for the containment of organic substances.

本文讨论了使用商用 1 型 OPC 水泥、最大颗粒尺寸低于 5 毫米的商用石灰石骨料、高效减水剂和水制备的几种砂浆的实验结果。将不同量的来自耐火块工业生产的松散粉末形式的废硅砂添加到上述基本组分中。还使用添加不同量的细石灰石填料的相同基本商业成分制备了几个附加样品。后一组组合物用于制备用作参考材料的样品。废硅砂和细石灰石填料按从生产商处收到的原样使用。在制备过程中，与所有其他混合组分相比，含有硅砂的糊剂表现出更好的可加工性。所有水合材料在固化后均表现出良好的抗压强度和低吸水率，但含有硅砂的材料由于其低残余孔隙率和火山灰反应而显示出最佳的机械性能，可用于生产直接与水接触的结构或腐蚀性环境，例如适合容纳有机物质的下水道或储罐。