Givari, Farhan Ahmad (2025) Effect of thermal-mechanical treatment method on fine recycled concrete aggregate (frca) on frca physical properties and mechanical properties of recycled mortar / Farhan Ahmad Givari</p>. Diploma thesis, Universitas Negeri Malang.
Full text not available from this repository.Abstract
p The increasing amount of construction concrete waste and exploitation of natural aggregates has driven the need to utilize Recycled Concrete Aggregate (RCA) as an environmentally friendly material. However RCA has poor physical properties due to attached cement residues necessitating improvement methods such as thermal-mechanical treatment. The limited research on treatment methods for Fine Recycled Concrete Aggregate (FRCA) and its application in mortar has also motivated this study. This research aims to analyze the effect of this treatment method on the physical properties of FRCA and the mechanical properties of recycled mortar while determining the optimal FRCA substitution percentage in mortar mixtures. FRCA was obtained from laboratory concrete waste with 25 MPa strength crushed using a stone crusher. The thermal-mechanical treatment involved heating at 250 deg C for two hours and grinding in a Los Angeles machine for 500 rotations using 12 steel balls. FRCA s physical properties were tested including gradation bulk density specific gravity and water absorption. Meanwhile the mortar s mechanical properties were evaluated through compressive strength and flexural strength tests with FRCA substitution variations of 0% 25% 50% 75% and 100%. The results showed that thermal-mechanical treatment improved FRCA s physical properties including a reduction in water absorption from 6.06% to 5.39% and an increase in specific gravity from 2.40 to 2.44. In mortar testing 100% FRCA substitution yielded a compressive strength of 24.32 MPa (16.74% lower than normal mortar) while 50% TFRCA substitution achieved 28.40 MPa (only 2.77% lower). Flexural strength tended to decrease with the increasing FRCA or TFRCA substitution with the highest values at 25% substitution (6.37 MPa) for FRCA and 50% (5.96 MPa) for TFRCA. Thus thermal-mechanical treatment effectively improves FRCA s physical properties and produces recycled mortar with mechanical performance approaching normal mortar particularly at 50% TFRCA substitution. The findings are expected to contribute to the development of environmentally friendly construction materials utilizing concrete waste. /p
| Item Type: | Thesis (Diploma) |
|---|---|
| Divisions: | Fakultas Teknik (FT) > Departemen Teknik Sipil (TS) > S1 Teknik Sipil |
| Depositing User: | library UM |
| Date Deposited: | 04 Jun 2025 04:29 |
| Last Modified: | 09 Sep 2025 03:00 |
| URI: | http://repository.um.ac.id/id/eprint/425864 |
Actions (login required)
 |
View Item |