Use of recycled fine aggregates for Control Low Strength Materials (CLSMs) production

• Self-compacting and flowable adequate Controlled Low Strength Materials made with recycled fine aggregates were designed.
• Fresh and hardened state properties of CLSM were defined and evaluated according to standards.
• Adequate mix proportions of CLSM made with raw and recycled aggregates were determined in order to its application.
• The use of high percentage of recycled fine aggregate in CLSM were validated.

It is known that 50% of recycled aggregate is fine aggregate, however its use is still limited. In this research work the use of recycled fine aggregates for Controlled Low Strength Materials (CLSMs) production was analysed. Self-compacting and flowable CLSM material was composed of cement, fine aggregates, water and an air-entrained admixture. Adequate mix proportions of CLSM material produced with recycled fine aggregates were validated according to the minimum requirements of ASTM and the results obtained by CLSM produced with natural fine aggregates. Bleeding and penetration resistance for fresh state and density, porosity and absorption in hardened strength of optimum mix proportions of all CLSM mixtures with recycled aggregates were also validated.