Assessment of strength and abrasion resistance of elasto-plastic fiber reinforced concrete using geopolymer based recycled aggregates

Authors : Abdelaziz Y MOHAMED, Orhan CANPOLAT, Mukhallad Mohammed Mawlood ALMASHHADANI

Pages : 244-248

Doi:10.35208/ert.938010

View : 33 | Download : 14

Publication Date : 2021-09-30

Article Type : Research Paper

Abstract :Recycled aggregates and geopolymer binders are green materials contributing to the sustainability of the planet. We investigated the performance of geopolymer concrete using recycled aggregates insert ignore into journalissuearticles values(fly ash insert ignore into journalissuearticles values(FA); and ground granulated blast furnace slag insert ignore into journalissuearticles values(GGBS);); related to their mechanical properties. Geopolymer concrete were prepared by mixing 50% low calcium fly ash, 50% GGBS, sodium hydroxide and sodium silicate solution, Coarse aggregate insert ignore into journalissuearticles values(Natural coarse aggregate, Recycled coarse aggregate);, Fine aggregate insert ignore into journalissuearticles values(Crushed Sand, Riverbed Sand); and elastoplastic fibers. Recycled aggregate used was obtained locally from Istanbul, Turkey. To explore the efficiency of recycled aggregate, during the production of geopolymer concrete, partial replacement of recycled coarse aggregate with natural aggregate was made in 10, 20, 30, and 40%. To compare the results, geopolymer concrete containing 100% natural aggregates was made. Since concrete gains strength with time after casting, On Day-28 and Day-90, the compressive strength, split tensile strength, and flexural strength of those geopolymer based concrete were examined. Results of the test showed that the compressive strength of 28 and 90 days w.r.t. different ratios was 26.8, 25.3, 24.2, 23.1, 23 MPa, and 30.2, 28.1, 27.0, 25.2, 25.0, 23.0 Mpa respectively, while split tensile strength was 1.9, 1.5, 1.5, 1.4, 1.4 MPa and 2.0, 1.9, 1.9, 1.6, 1.5 MPa respectively, and the ultimate flexural strength of tested beams were in the range of 3.53 to 4.54 MPa. Although the general performance of the produced samples was showing a decrement with the increasing ratio of recycle aggregates, the obtained results indicated that using recycled aggregate is up to some extent of 30% is beneficial in terms of strength.
Keywords : Abrasion properties, Geopolymer concrete, Recycled aggregate, Elasto plastic fibers, Splitting tensile strength, Sustainability