Erüz, A. OrhunÖzkul, M. HulusiAkalın, ÖzlemMaraşlı, Muhammed2025-03-092025-03-0920252662-3161https://doi.org/10.1007/978-3-031-72955-3_62https://hdl.handle.net/20.500.12662/4987Heavy-weight concretes are known for their high unit weight inherited from the aggregates and developed mainly for radiation shielding. Therefore, minimal porosity besides the high unit weight is a desired property. Numerous particle-packing theories were put forward to decrease the porosity by an ideal reference curve; modified Andreassen model based on the size distribution of ingredients to adjust the fineness. This research investigates the effect of the mentioned method on heavy-weight mortars. Cement, micro and nano silica combinations, and their polymer additive mixtures were used as binders in the specimens, along with barite and finely ground magnetite aggregates. In this work, the aggregate size limit selected 3 mm and the fineness factor of q was chosen as 0.22 and 0.25, depending on the mixture. To achieve a self-levelling consistency, the w/c ratio was kept constant at 0.40, and a superplasticizer was added to maintain the workability. Consecutively, the specimens were examined for unit weight, compressive strength, and capillary water absorption. The collected results were analyzed, and the difference between groups was compared according to their composition. © The Author(s) 2025.eninfo:eu-repo/semantics/closedAccessHeavy-weight MortarParticle-Packing TheoryPolymer-modified Heavy-weight MortarBook Part10.1007/978-3-031-72955-3_622-s2.0-85210559644610Q460361