TY - JOUR AU - Kashkash, Saied AU - Czoboly, Olivér Attila AU - Orbán, Zoltán TI - Effect of Moisture Condition and the Composition of Aggregate from Demolition Waste on Strength and Workability Properties of Recycled Concrete JF - BUILDINGS J2 - BUILDINGS-BASEL VL - 13 PY - 2023 IS - 7 PG - 13 SN - 2075-5309 DO - 10.3390/buildings13071870 UR - https://m2.mtmt.hu/api/publication/34074719 ID - 34074719 AB - Large quantities of construction and demolition waste are generated annually, and in many parts of the world, it is disposed of in landfills. Utilizing this waste to produce coarse aggregates for concrete production offers a potentially sustainable approach that mitigates environmental impacts. Despite the widespread encouragement of using recycled aggregates as a substitute for natural coarse aggregates, practical applications remain limited, and the concrete production industry continues to primarily rely on exploiting natural resources. The recycling of concrete waste derived from the demolition of obsolete or damaged buildings as structural concrete has been seldom realized thus far, primarily due to regulatory constraints and concerns regarding technological difficulties. This paper presents a case study to demonstrate that, with meticulous preparation, concrete waste from a demolished building can be rendered suitable for use as structural concrete. The experimental investigation examined how the proportion of recycled aggregates obtained from a demolished building and the moisture content influenced the properties of fresh and hardened concrete. The results revealed an increase in the compressive strength of the hardened recycled concrete as a higher proportion of recycled coarse aggregate was incorporated into the mixture. Moreover, pre-soaked recycled coarse aggregates were found to improve the workability of the recycled concrete mixture significantly. The results highlight the significant potential of utilizing concrete waste as a valuable resource in the production of ready-mix concrete for structural applications, provided that appropriate measures are taken to optimize its properties. LA - English DB - MTMT ER - TY - GEN AU - Kashkash, Saied AU - Orbán, Zoltán AU - Czoboly, Olivér Attila TI - IMPROVING THE PERFORMANCE OF RECYCLED CONCRETE FOR STRUCTURAL APPLICATIONS PY - 2022 UR - https://m2.mtmt.hu/api/publication/33176081 ID - 33176081 N1 - előadás AB - Concrete is the most widely used constructionmaterial in the world, and its use is projected to increase even more in the future. However, the production and use of concrete in the construction industry generates huge amounts of CO2 emissions with currently used technology. The construction of concrete structures will also be made more difficult in the future because the aggregate traditionally used to make concrete is becoming increasingly difficult to obtain. Aggregate is a non-renewable raw material, its supplies are depleting and its extraction is increasingly energy-intensive and environmentally damaging. Because existing concrete structures deteriorate over time, they will inevitably have to be demolished and end up as demolition waste. The disposal of concrete waste has also become a significant environmental problem, with the amount of concrete waste from the construction industry going to landfill increasing every year. For these reasons, a solution for the proper treatment and recycling of construction concrete waste is of increasing importance to society and the technological process of solving this problem should become a standard undertaking for the civil engineering profession. For a wide range of industrial applications of recycled concrete, it is necessary to increase the performance of concrete products made from recycled ingredients. This not only concerns strength properties but also other characteristics such as durability and workability. To optimize the manufacturing process, it is necessary to improve the preparation and testing methodology prior to the concrete mix design. Based on the measurable properties of a given concrete waste raw material, even in the pre-processing stage, the composition of the recycled concrete mix can be optimized for specific applications. This paper describes the applied testing and design methodology for a case study in Hungary and shows the potential structural applications of the recycled concrete produced LA - English DB - MTMT ER - TY - GEN AU - Kashkash, Saied TI - Recycling of concrete. előadás TS - előadás PY - 2022 UR - https://m2.mtmt.hu/api/publication/33170999 ID - 33170999 LA - English DB - MTMT ER - TY - GEN AU - Orbán, Zoltán AU - Kashkash, Saied TI - Sustainable and additive construction technologies. előadás TS - előadás PY - 2022 UR - https://m2.mtmt.hu/api/publication/33118882 ID - 33118882 N1 - előadás LA - English DB - MTMT ER - TY - JOUR AU - Souphavanh, Senesavath AU - Salem, Ali AU - Kashkash, Saied AU - Bintul, Zehra AU - Orbán, Zoltán TI - The effect of recycled tyre steel fibers on the properties of concrete JF - POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES J2 - POLLACK PERIODICA VL - 17 PY - 2022 IS - 1 SP - 43 EP - 49 PG - 7 SN - 1788-1994 DO - 10.1556/606.2021.00388 UR - https://m2.mtmt.hu/api/publication/32523826 ID - 32523826 LA - English DB - MTMT ER - TY - JOUR AU - Zehra, Bintul AU - Salem, Ali AU - Senesavath, Souphavanh AU - Kashkash, Saied AU - Orbán, Zoltán TI - Sustainable design of concrete using industrial additives and wastes JF - POLLACK PERIODICA: AN INTERNATIONAL JOURNAL FOR ENGINEERING AND INFORMATION SCIENCES J2 - POLLACK PERIODICA VL - 16 PY - 2021 IS - 2 SP - 19 EP - 24 PG - 6 SN - 1788-1994 DO - 10.1556/606.2020.00250 UR - https://m2.mtmt.hu/api/publication/32502988 ID - 32502988 LA - English DB - MTMT ER - TY - JOUR AU - Czoboly, Olivér AU - Kashkash, Saied AU - Orbán, Zoltán AU - Kashkash, Saied TI - Újrahasznosított és visszanyert, tört adalékanyag alkalmazhatósága betonban JF - MAGYAR ÉPÍTŐIPAR J2 - MAGYAR ÉPÍTŐIPAR VL - 70 PY - 2021 IS - 1-2 SP - 25 EP - 28 PG - 4 SN - 0025-0074 DO - 10.17168/MEIP.2021.70.25 UR - https://m2.mtmt.hu/api/publication/32497764 ID - 32497764 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kashkash, Saied AU - Orbán, Zoltán AU - Czoboly, O. TI - The influence of utilizing recycled and reclaimed coarse aggregates in producing concrete for structural applications JF - TEHNICKI VJESNIK-TECHNICAL GAZETTE J2 - TEH VJESN VL - 28 PY - 2021 IS - 3 SP - 1025 EP - 1031 PG - 7 SN - 1330-3651 DO - 10.17559/TV-20200527092654 UR - https://m2.mtmt.hu/api/publication/32087141 ID - 32087141 LA - English DB - MTMT ER - TY - CHAP AU - Kashkash, Saied AU - Orbán, Zoltán ED - Iványi, Péter TI - Towards green concrete and sustainable construction for better environment T2 - Abstract book for the 16th MIKLÓS IVÁNYI INTERNATIONAL PHD & DLA SYMPOSIUM PB - Pollack Press CY - Pécs SN - 9789634295785 PY - 2020 UR - https://m2.mtmt.hu/api/publication/33563590 ID - 33563590 LA - English DB - MTMT ER -