Li Yongyu, Zhang Hongxue, Huang Guodong, Cui Yi, Feng Jiacheng, Zhang Yuting, Li Dawei, Zhu Jielei
School of Civil Engineering and Construction, Anhui University of Science and Technology, Huainan 232001, China.
School of Mechanics and Optoelectronic Physics, Anhui University of Science and Technology, Huainan 232001, China.
Polymers (Basel). 2022 May 30;14(11):2222. doi: 10.3390/polym14112222.
A self-foaming alkali-activated lightweight material was prepared by the pretreatment of municipal solid waste incineration bottom ash (BA). The low weight could be achieved without adding a foaming agent by using the low-density and self-foaming expansion characteristics of BA in combination with a strong alkali. The effects of BA, liquid sodium silicate (LSS), and calcium hydroxide (CH) on dry and wet densities, as well as water absorption, are discussed. The results show that increasing the BA content can significantly improve the foaming effect and reduce the dry and wet densities of specimens. However, it also leads to a sudden decrease in compressive strength and a significant increase in water absorption. LSS and CH can significantly improve the ability to seal bubbles by accelerating condensation, and they further reduce dry and wet densities without significantly improving water absorption. It is most effective at BA, LSS, and CH contents of 60, 20, and 2%, respectively.
通过对城市固体废弃物焚烧底灰（BA）进行预处理，制备了一种自发泡碱激发轻质材料。利用BA的低密度和自发泡膨胀特性，结合强碱，无需添加发泡剂即可实现低重量。讨论了BA、液体硅酸钠（LSS）和氢氧化钙（CH）对干密度、湿密度以及吸水率的影响。结果表明，增加BA含量可显著提高发泡效果，并降低试件的干密度和湿密度。然而，这也会导致抗压强度突然下降以及吸水率显著增加。LSS和CH可通过加速凝结显著提高封闭气泡的能力，它们进一步降低了干密度和湿密度，而不会显著提高吸水率。当BA、LSS和CH的含量分别为60%、20%和2%时最为有效。
