An experimental investigation was carried out to evaluate the performance of (к)-carrageenan as a novel viscosity-modifying admixture (VMA) in cement-based materials. The effect of different dosages of (к)-carrageenan and their combinations with two different high-range water-reducer (HRWR) types on rheology, forced bleeding, hydration kinetics, and compressive strength of cement suspensions was evaluated. Welan gum was also used for comparison purposes due to its thickening and binding properties. The use of (к)-carrageenan led to higher yield stress and plastic viscosity, shear-thinning response, and greater resistance to forced bleeding compared to the reference mixture. However, when used in combination with HRWR, the suspensions exhibited linear Bingham behavior, lower yield stress, plastic viscosity, and forced bleeding. In the case of cement hydration kinetics, the use of (κ)-carrageenan prolonged the dormant period, regardless of the HRWR type. The mixture containing 0.5% of (к)-carrageenan showed the highest compressive strength.

进行了一项实验研究，以评估 (к)-角叉菜胶作为水泥基材料中新型粘度调节剂 (VMA) 的性能。评估了不同剂量的 (к)-角叉菜胶及其与两种不同的高效减水剂 (HRWR) 类型的组合对水泥悬浮液的流变学、强制泌水、水化动力学和抗压强度的影响。由于其增稠和粘合特性，韦兰胶也用于比较目的。与参考混合物相比，(к)-角叉菜胶的使用导致更高的屈服应力和塑性粘度、剪切稀化响应和更大的强制出血阻力。然而，当与 HRWR 结合使用时，悬浮液表现出线性宾汉行为、较低的屈服应力、塑性粘度和强制泌水。在水泥水化动力学的情况下，无论 HRWR 类型如何，（κ）-角叉菜胶的使用都会延长休眠期。含有 0.5% (к)-角叉菜胶的混合物表现出最高的抗压强度。