This work reports the utilization of natural Pisha sandstone (PS) as a new precursor to manufacture a novel alkali-activated cement. The rheological properties, compressive strength, drying shrinkage, hydration properties, CO₂ emission and energy consumption of the alkali-activated uncalcined Pisha sandstone cement composites (AUPC) were investigated. AUPC mortar containing 1.0 wt% of sodium hexametaphosphate and 0.2 wt% of ligneous calcium sulfonate as plasticizers showed similar rheological properties to those of ordinary Portland cement (OPC) mortar. The compressive strength of AUPC could reach 52.7 MPa after curing at 80 °C for 12 h. The increase of activator concentration (up to 4 mol/L) and the extending of curing time (up to 12 h) significantly increased the hydration of feldspar, montmorillonite and blended slag in AUPC. This resulted in the formation of more low Al/Si ratio aluminosilicate gels, calcium silicate hydrate (C-S-H) gels, and calcium alumina silicate hydrate (C-A-S-H) gels. When the concentration of NaOH and the curing time exceeded 4 mol/L and 12 h respectively, the porosity of AUPC increased, thereby lowering the compressive strength. The 90-day drying shrinkage of the AUPC with 4 mol/L NaOH activator increased from 1.68 to 3.04 mm/m when the water-to-binder ratio increased from 0.25 to 0.45. The total CO₂ emissions and energy consumption for producing AUPC were estimated to be much lower than producing OPC.

这项工作报告了利用天然 Pisha 砂岩 (PS) 作为制造新型碱活化水泥的新前体。流变性能、抗压强度、干燥收缩率、水化性能、CO ₂研究了碱活化未煅烧 Pisha 砂岩水泥复合材料 (AUPC) 的排放和能耗。含有 1.0 wt% 六偏磷酸钠和 0.2 wt% 木质磺酸钙作为增塑剂的 AUPC 砂浆显示出与普通硅酸盐水泥 (OPC) 砂浆相似的流变性能。AUPC在80°C固化12小时后的抗压强度可达52.7 MPa。活化剂浓度的增加（高达 4 mol/L）和固化时间的延长（高达 12 h）显着增加了 AUPC 中长石、蒙脱石和混合渣的水化作用。这导致形成更多的低铝硅比铝硅酸盐凝胶、水合硅酸钙 (CSH) 凝胶和水合硅酸钙铝 (CASH) 凝胶。当NaOH浓度和固化时间分别超过4 mol/L和12 h时，AUPC的孔隙率增加，从而降低抗压强度。当水胶比从 0.25 增加到 0.45 时，含有 4 mol/L NaOH 活化剂的 AUPC 的 90 天干燥收缩率从 1.68 增加到 3.04 mm/m。总二氧化碳₂生产 AUPC 的排放和能源消耗估计远低于生产 OPC。