Xiong Yuanliang, Wang Shiquan, Ma Liguo, Wang Tingcong, Zhou Manling, Hu Zhongshuai, Wang Zhenyu
School of Civil Engineering, Yantai University, Yantai 264005, China.
Lunan High Speed Railway Co., Ltd., Jinan 250000, China.
Materials (Basel). 2025 Jul 15;18(14):3320. doi: 10.3390/ma18143320.
In this study, sodium hydroxide and calcium hydroxide are employed as activators to enhance the properties of foam concrete with hybrid alkali-activated cementitious material as the base mix. The effect of the activators on the properties of foam concrete is studied. The experimental results reveal that the presence of sodium hydroxide can also enhance the hydration rate of the base mix and increase the density of the pore wall in foamed concrete, thus enhancing the compressive strength of foamed concrete. Meanwhile, the addition of excessive sodium hydroxide may introduce too much water and increase the settlement of foamed concrete, thus resulting in a coarse and uneven pore structure. The settlement of the foam concrete with calcium hydroxide as an activator can be significantly increased, which is more related to the settlement of the matrix. The presence of calcium hydroxide could enhance dense pore walls, thus increasing the compressive strength and lowering water absorption.
在本研究中，氢氧化钠和氢氧化钙被用作活化剂，以增强以混合碱激发胶凝材料为基础混合料的泡沫混凝土的性能。研究了活化剂对泡沫混凝土性能的影响。实验结果表明，氢氧化钠的存在还可以提高基础混合料的水化速率，并增加泡沫混凝土中孔壁的密度，从而提高泡沫混凝土的抗压强度。同时，添加过量的氢氧化钠可能会引入过多的水分并增加泡沫混凝土的沉降，从而导致孔结构粗糙且不均匀。以氢氧化钙作为活化剂的泡沫混凝土的沉降会显著增加，这与基体的沉降关系更大。氢氧化钙的存在可以增强致密的孔壁，从而提高抗压强度并降低吸水率。
