Suarez-Riera Daniel, Lavagna Luca, Falliano Devid, Ferro Giuseppe Andrea, Pavese Matteo, Tulliani Jean-Marc, Restuccia Luciana
Department of Structural, Building and Geotechnical Engineering, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
Materials (Basel). 2025 Sep 8;18(17):4208. doi: 10.3390/ma18174208.
This study aimed to evaluate mortar performance by substituting part of standard sand with recycled fine aggregates sourced from concrete waste, aiming to assess mechanical properties and durability. Moreover, this study examined the use of crystallizing agents to understand their impact on mortar properties. Four mortar series were prepared with sand substitution percentages ranging from 25% to 100% while adhering to the diverse fraction proportions within the standardized sand particle size distribution. Mechanical results indicate that incorporating recycled concrete sand significantly enhances mechanical properties with respect to standard sand. The study showed the technical feasibility of producing mortars with up to 100% recycled fine concrete aggregate with enhanced compressive strength, albeit requiring higher superplasticizer dosages. The addition of crystallizing agents provided an increase in flexural strength in specific conditions, while they did not provide a significant improvement to compressive strength.
本研究旨在通过用来自混凝土废料的再生细骨料替代部分标准砂来评估砂浆性能，以评估其力学性能和耐久性。此外，本研究还考察了结晶剂的使用情况，以了解它们对砂浆性能的影响。制备了四个砂浆系列，砂替代率范围为25%至100%，同时遵循标准砂粒径分布内的不同级配比例。力学结果表明，与标准砂相比，掺入再生混凝土砂显著提高了力学性能。该研究表明，使用高达100%的再生细混凝土骨料生产砂浆具有技术可行性，其抗压强度有所提高，尽管需要更高剂量的高效减水剂。在特定条件下，添加结晶剂可提高抗折强度，但对抗压强度没有显著改善。
