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A platform for research: civil engineering, architecture and urbanism
Application of recycled concrete aggregates for stabilization of clay reinforced with recycled tire polymer fibers and glass fibers
Graphical abstract Display Omitted
Highlights RTPF and RCA have been used for clay reinforcement/stabilization. The strength of clay-fiber-RCA composites is significantly higher than clay. Porosity/volume relations have been explored for clay-fiber-RCA composites. Composites with 0.5%RTPF and 10%RCA are suited as subbase of flexible pavements.
Abstract The application of recycled materials for soil improvement is advantageous from the viewpoint of lowering construction costs, preventing depletion of natural resources, and reducing environmental pollutions. This experimental study investigates the application of recycled concrete aggregates to enhance the strength properties of clay soil reinforced with recycled tire polymer fibers and glass fibers. Unconfined compression and indirect tensile tests were performed on composite soils comprising clay reinforced with 0.5 % fibers and stabilized with 5 %, 10 % and 15 % recycled concrete aggregates. Laboratory findings elaborated that the increase in the RCA content and curing time would significantly improve the unconfined compressive and tensile strengths as compared to the clay. Moreover, the approximate ratio of tensile to compressive strength is a constant value for the composite soils, irrespective of fiber type, RCA amount and curing duration. Concerning the practical implications, the clay reinforced with 0.5 % fibers and stabilized with 10 % recycled concrete aggregates is strong enough after 28 days of curing to fulfill the strength requirements of subbase layers in both flexible and rigid pavements.
Application of recycled concrete aggregates for stabilization of clay reinforced with recycled tire polymer fibers and glass fibers
Graphical abstract Display Omitted
Highlights RTPF and RCA have been used for clay reinforcement/stabilization. The strength of clay-fiber-RCA composites is significantly higher than clay. Porosity/volume relations have been explored for clay-fiber-RCA composites. Composites with 0.5%RTPF and 10%RCA are suited as subbase of flexible pavements.
Abstract The application of recycled materials for soil improvement is advantageous from the viewpoint of lowering construction costs, preventing depletion of natural resources, and reducing environmental pollutions. This experimental study investigates the application of recycled concrete aggregates to enhance the strength properties of clay soil reinforced with recycled tire polymer fibers and glass fibers. Unconfined compression and indirect tensile tests were performed on composite soils comprising clay reinforced with 0.5 % fibers and stabilized with 5 %, 10 % and 15 % recycled concrete aggregates. Laboratory findings elaborated that the increase in the RCA content and curing time would significantly improve the unconfined compressive and tensile strengths as compared to the clay. Moreover, the approximate ratio of tensile to compressive strength is a constant value for the composite soils, irrespective of fiber type, RCA amount and curing duration. Concerning the practical implications, the clay reinforced with 0.5 % fibers and stabilized with 10 % recycled concrete aggregates is strong enough after 28 days of curing to fulfill the strength requirements of subbase layers in both flexible and rigid pavements.
Application of recycled concrete aggregates for stabilization of clay reinforced with recycled tire polymer fibers and glass fibers
Tabatabaie Shourijeh, Piltan (author) / Masoudi Rad, Amir (author) / Heydari Bahman Bigloo, Farhad (author) / Binesh, Seyed Mohammad (author)
2022-09-12
Article (Journal)
Electronic Resource
English
<italic>G<inf>s</inf></italic> , specific gravity of solid particles , <italic>η</italic> , porosity of clay-fiber mixture and clay-fiber-RCA composite , <italic>T</italic> , Tensile strength , <italic>UCS</italic> , unconfined compressive strength , <italic>RTPF</italic> , recycled tire polymer fiber , <italic>GF</italic> , glass fiber , <italic>RCA</italic> , recycled concrete aggregate , <italic>ρ<inf>d</inf></italic> , <italic>ρ<inf>dmax</inf></italic> dry density, maximum dry density , <italic>w</italic> , <italic>w<inf>opt</inf></italic>, water content, optimum water content , <italic>σ<inf>t</inf></italic> , tensile stress in fiber material , <italic>τ<inf>B</inf></italic> , bonding resistance at fiber soil interface , <italic>X</italic> , fiber content , <italic>m<inf>x</inf></italic> , mass of fiber X , <italic>m<inf>clay</inf></italic> , dry mass of clay , <italic>m<inf>RCA</inf></italic> , dry mass of RCA , <italic>V<inf>X</inf></italic> , volume of fiber in specimen , <italic>V<inf>spec</inf></italic> , volume of specimen , <italic>V<inf>clay</inf></italic> , volume of clay , <italic>V<inf>RCA</inf></italic> , volume of RCA , <italic>α</italic> , <italic>β</italic>, fitting parameters , Recycled concrete aggregates , Recycled tire polymer fiber , Glass fiber , Clay , Unconfined compression strength
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