Converting construction and demolition waste (CDW) into secondary raw materials is one of the priorities of environmental policy and circular economy strategy. This study analysed the variation in eco-efficient paste reactivity with OPC replacement ratio (5% to 10%) and hydration time (2 d, 28 d and 90 d). Three types of CDW were explored: two (calcareous and siliceous) consisting of fine (<5 mm) concrete waste and one in laminated glass (<40 mm). Further to the mineralogical phases identified at the aforementioned percentages, the four materials, i.e., the three types of CDW-blended cements and the OPC reference, were similarly reactive. The primary hydration products, C-S-H gels, C₄AH₁₃ and C₄AcH₁₁, ettringite and portlandite, were the same as observed in OPC hydration. These findings attest to the scientific viability recycling such CDWs as mineral additions in eco-cement manufacture and consequently eliminating the need for stockpiling these materials at recycling/storage plants.

将建筑和拆除废物 (CDW) 转化为二次原材料是环境政策和循环经济战略的优先事项之一。本研究分析了生态高效浆料反应性随 OPC 替代率（5% 至 10%）和水合时间（2 天、28 天和 90 天）的变化。研究了三种类型的 CDW：两种（钙质和硅质）由细 (<5 毫米) 混凝土废料和一种夹层玻璃 (<40 毫米) 组成。除了以上述百分比确定的矿物相之外，四种材料，即三种类型的 CDW 混合水泥和 OPC 参考，具有类似的反应性。主要水合产物，CSH 凝胶，C ₄ AH ₁₃和 C ₄ AcH ₁₁、钙矾石和硅酸盐与在 OPC 水合中观察到的相同。这些发现证明了在生态水泥制造中回收此类 CDW 作为矿物添加物的科学可行性，从而消除了在回收/储存工厂储存这些材料的需要。