article · Journal of Materials Research and Technology
This research investigates the performance of sustainable high-strength concrete that incorporates recycled concrete debris as a total replacement for coarse aggregate, combined with industrial waste replacing 50 percent and 75 percent of Ordinary Portland cement. Across 25 formulations, researchers assessed binary, ternary, and quaternary blends incorporating fly ash, ground-granulated blast-furnace slag, and silica fume, alongside nanosilica additions ranging from 0 to 5 percent. Evaluations covered workability, mechanical strength, and transport properties. The results showed that concrete containing 75 percent quaternary blends and 3 percent nanosilica achieved enhanced mechanical performance at 28 and 91 days. The optimal balance occurred with 50 percent quaternary cement replacement and 3 percent nanosilica, which recorded a compressive strength of 80.7 MPa, flexural strength of 10.09 MPa, and significantly reduced water and chloride permeability at 28 days.
Concrete manufacturing is a major source of carbon emissions and consumes vast quantities of natural stone. Demonstrating that structural high-strength concrete can be produced using entirely recycled aggregates and up to 75 percent industrial by-products offers a practical method to divert waste from landfills and reduce cement reliance, while still meeting demanding engineering requirements.
The work provides tested formulation ratios that concrete producers and building contractors could use to manufacture low-carbon, high-strength structural elements. Because the findings are based on laboratory batching and testing of specimens, the technology sits at an applied testing stage and requires scaled field validation and regional standard qualification before commercial implementation.
AI-generated from the published abstract. Always read the original work before citing.
This research aims to study the effect of adding nanosilica (NS) on the properties of sustainable high-strength concrete (SHSC). The SHSC was produced using recycled aggregates from concrete debris as a 100% alternative to coarse aggregate, and industrial waste was used as supplementary cementitious materials at 50% and 75% of Ordinary Portland cement (OPC) weight. A total of 25 mixes, including control mix (The first mix was made as the reference by using only cement without replacement materals), binary mixes (OPC and fly ash (FA)), ternary mixes (OPC, FA and ground-granulated blast-furnace slag (GGBS)) and quaternary mixes (OPC, FA, GBFS and silica fume (SF)) were developed. The dosage of NS was 0%, 1%, 3% and 5% by binder ratio. The fresh properties of SHSC were evaluated by slump test, and the mechanical properties were assessed by testing the compressive strength, splitting tensile strength, flexural strength and modulus of elasticity. The transport properties were evaluated by water permeability, water sorptivity and chloride permeability tests. Results showed that compared with the reference mixture, the SHSC containing 75% of the quaternary blends with 3% NS achieved enhanced mechanical properties at 28 and 91 days, indicating that this mixture can achieve the highest sustainability performance. The SHSC mixture containing 3% NS and 50% quaternary mixtures achieved the highest performance of 80.7, 6.46 and 10.09 MPa for compressive strength, split tensile strength and flexural strength, respectively, at 28 days. This SHSC mixture also achieved water permeability; chloride permeability was 2.54 × 10−11 (cm/sec) and 1370 coulombs at 28 days.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.jmrt.2023.05.050
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
