인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract This study presents a significant advancement in the development of sustainable construction materials by utilizing treated plastic waste and foundry sand to produce lightweight foam concretes and investigates the performance of lightweight foamed concrete premixed with a new composite of plastic waste pre-treated with polyester polymer and covered with waste foundry sand as a sand replacement material with different dosages of 10, 20, 30, 40, and 50 by weight of sand. The mechanical properties, including compressive, tensile, and flexural strengths, were evaluated at ages of 7, 14, 28, 56, and 180, in addition to their fresh properties. Durability aspects such as porosity, shrinkage, and water absorption ensure long-term resilience. The thermal properties, including conductivity and diffusivity, were examined to enhance the energy efficiency, and microstructural analyses were conducted. The results showed a significant increase in initial and final setting times by 6.3 and 30%, respectively, with a 6.4% improvement in workability with 20% sand replacement. Compared to the reference mix, the dry density decreased by 9.4%, and the compressive increased by 76.1, 70.4, 84.2, 84.4, and 83% at 7, 14, 28, 56, and 180 days, respectively. Moreover, splitting strength increased by 99%, and flexural strength increased by 84.7, 91.3, 115, 111.9, and 110.9% compared to the reference mix at 7, 14, 28, 56, and 180 days, respectively. The dry shrinkage decreased by 56.48% after 28 days for all replacement ratios. Notably, replacing sand with 50% waste plastic reduced thermal conductivity to 0.28 W·m −1 ·K −1 and decreased specific heat capacity by 18.7%. Scanning electron microscopic analysis revealed a dense microstructure with smaller voids. These findings demonstrate that incorporating treated plastic waste and foundry sand as sand replacements in lightweight foamed concrete significantly enhances the mechanical strength, durability, and thermal efficiency, making it a promising material for sustainable and energy-efficient construction in the future.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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