Chất thải từ đinh kim loại và xỉ thép như là những vật liệu thay thế thân thiện với môi trường cho cấu kiện chắn bức xạ

Buildings - Tập 12 Số 8 - Trang 1120
Mohammed M. Attia1, Bassam Abdelsalam Abdelsalam1, Mohamed Amin1, Ibrahim Saad Agwa2,1, Mohammad Farouk Abdelmagied3
1Civil and Architectural Constructions Department, Faculty of Technology and Education, Suez University, Suez 43713, Suez, Egypt
2Civil Engineering Department, El-Arish High Institute for Engineering and Technology, El-Arish 45511, North Sinai, Egypt
3Civil Engineering Department, Benha Faculty of Engineering, Benha University, Benha 13511, Qalyubiyya, Egypt

Tóm tắt

Tái chế chất thải kim loại đã trở thành một yêu cầu toàn cầu nhờ vào lợi ích môi trường và hoạt động kinh tế mạnh mẽ của nó. Chất thải từ đinh kim loại (MNW) là một sản phẩm phụ của quá trình sản xuất đinh kim loại. MNW có kích thước đồng nhất, chứa tỷ lệ sắt cao và có trọng lượng riêng lớn so với cốt liệu bình thường. Chúng tôi trình bày việc tái chế MNW như một phần thay thế cho cốt liệu mịn và xỉ thép lò hồ quang điện (EAFSS) như cốt liệu thô để sản xuất bê tông nặng bền vững (HWC). Mục tiêu nghiên cứu chính của chúng tôi là khảo sát khả năng chắn bức xạ và các tính chất cơ học của HWC bền vững thông qua việc thay thế một phần MNW với 10, 20, 30 và 40% cát. EAFSS là cốt liệu thô cho 60% tổng thể tích. Các tính chất tươi và cứng của HWC đã được trình bày. Hơn nữa, chúng tôi đã phân tích cấu trúc bên trong của các hỗn hợp HWC bằng kính hiển vi điện tử quét. Kết quả của chúng tôi cho thấy những ảnh hưởng tích cực của MNW lên trọng lượng riêng của bê tông. Mật độ của các hỗn hợp HWC dao động từ 2650 đến 3170 kg/m3. Ngoài ra, MNW góp phần tăng cường sức mạnh nén của các hỗn hợp bê tông với mức sử dụng lên đến 30%. Do đó, các tỷ lệ MNW đã cải thiện hành vi chịu thất bại của các hỗn hợp HWC. Hệ số suy giảm tuyến tính của các hỗn hợp HWC được cải thiện là do việc sử dụng các tỷ lệ MNW và mật độ cao hơn so với hỗn hợp tham chiếu.

Từ khóa


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