1. Jhatial, A.A., Goh, W.I., Mo, K.H., Sohu, S., Bhatti, I.A.: Green and sustainable concrete—the potential utilization of rice husk ash and egg shells. Civil Eng. J. 5(1) (2019). www.CivileJournal.org
2. Zainudeen, N., Jeyamathan, J.: Cement and its effect on the environment: a case study in Sri Lanka. In: Proceedings from International Conference on Building Education and Research (BEAR), pp. 1408–1416 (2008). http://www.irbnet.de/daten/iconda/CIB11336.pdf
3. Sakai, E., Yamada, K., Ohta, A.: Molecular structure and dispersion adsorption mechanisms of comb-type superplasticizers used in Japan. J. Adv. Concr. Technol. 1(1), 16–25 (2003)
4. Okonkwo, U.N., Odiong, I.C., Akpabio, E.E.: The effects of eggshell ash on strength properties of cement-stabilized lateritic. Int. J. Sustainable Construction Eng. Technol. 3(1), 18–25. ISSN: 2180-3242
5. Afizah Asman, N.S., Dullah, S., Lynn Ayog, J., Amaludin, A., Amaludin, H., Lim, C.H., Baharum, A.: Mechanical properties of concrete using eggshell ash and rice husk ash as partial replacement of cement. MATEC Web Conf. 103, 4–9 (2017). https://doi.org/10.1051/matecconf/201710301002