This paper investigates the effect of three different superplasticizers (SPs), Naphthalene (N), Melamine (M) and Polycarboxylate (PC), on the properties of one-part fly ash/slag geopolymer pastes activated by Ca(OH)₂/Na₂SO₄ powder combination. The flowability, setting time, and compressive strength of the achieved geopolymer pastes were assessed. It was found that the superplasticizers significantly improved the flowability, retarded the setting time, and increased the compressive strength of the one-part Ca(OH)₂/Na₂SO₄ geopolymer pastes. The most recommended superplasticizer was found to be polycarboxylate.

The use of polycarboxylate SP for decreasing the water content (i.e. w/b) in Ca(OH)₂/Na₂SO₄ geopolymer pastes has resulted in reducing the porosity and enhancing the compactness of the aluminosilicate gel, therefore, improved the compressive strength. It was found that the excessive use of polycarboxylate (i.e. 3%) for additional water reduction in Ca(OH)₂/Na₂SO₄ geopolymer pastes had an adverse effect; it extended the induction period and delayed the participation of reaction products, thus significantly prolonged the setting time.

Furthermore, a comparison between the achieved Ca(OH)₂/Na₂SO₄ geopolymer pastes and the conventional Na₂SiO₃-anhydrous one-part geopolymer pastes was carried out. It was found that Ca(OH)₂/Na₂SO₄ geopolymer exhibited significantly lower compressive strength, higher flowability and considerably longer setting time compared to Na₂SiO₃ geopolymer. Hence, such binder can be implemented as a green non-structural material.

本文研究了三种不同的高效减水剂（SP），萘（N），三聚氰胺（M）和聚羧酸盐（PC）对由Ca（OH）₂ / Na活化的粉煤灰/矿渣地质聚合物浆料的性能的影响₂ SO ₄粉末组合。评估了所获得的地质聚合物浆料的流动性，凝固时间和抗压强度。发现高效减水剂显着改善了单份Ca（OH）₂ / Na ₂ SO ₄地质聚合物浆料的流动性，延迟了凝固时间，并提高了其抗压强度。发现最推荐的高效减水剂是聚羧酸盐。

使用聚羧酸盐SP来降低Ca（OH）₂ / Na ₂ SO ₄地质聚合物浆料中的水含量（即w / b）导致降低了孔隙率并增强了铝硅酸盐凝胶的致密性，因此提高了抗压强度。发现在Ca（OH）₂ / Na ₂ SO ₄地质聚合物浆料中过量使用多羧酸盐（即3％）来进一步减少水分会产生不利影响。它延长了诱导期并延迟了反应产物的参与，从而大大延长了凝固时间。

此外，比较了所获得的Ca（OH）₂ / Na ₂ SO ₄地质聚合物浆料与常规的Na ₂ SiO _3-无水单组分地质聚合物浆料。发现与Na ₂ SiO ₃地质聚合物相比，Ca（OH）₂ / Na ₂ SO ₄地质聚合物表现出明显更低的抗压强度，更高的流动性和相当长的凝固时间。因此，这种粘合剂可以被实现为绿色非结构材料。