Sử dụng nguồn phế phẩm bã mía để tăng cường khả năng chịu uốn của bê tông

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Tác giả: THÀNH NHÂN NGUYỄN

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.197

Bộ sưu tập: Metadata

ID: 452540

Thêm vào giỏ Liên kết toàn văn

Bê tông, mặc dù là một vật liệu chịu nén tốt, nhưng lại có cường độ chịu kéo thấp và dễ bị nứt. Sau một thời gian sử dụng, các cấu kiện bê tông thường bắt đầu xuất hiện các vết nứt với bề rộng và mật độ lớn. Bê tông cốt sợi (BTCS) bã mía đã được đề xuất như một phương pháp giúp cải thiện khả năng chịu nứt của kết cấu bê tông, thông qua cơ chế khâu các vết nứt và truyền ứng suất qua chúng. Một nghiên cứu khoa học đã trình bày việc sử dụng bã mía đã qua xử lý vào dầm bê tông cốt thép (BTCT) để tăng khả năng chịu uốn của chúng. Tiến trình đúc mẫu và thí nghiệm được thực hiện trên 4 loại cấp phối với các hàm lượng bã mía khác nhau. Kết quả của nghiên cứu cho thấy rằng việc sử dụng bã mía trong bê tông đã cải thiện đáng kể khả năng chịu uốn của dầm BTCT và giảm thiểu sự xuất hiện của các vết nứt trong dầm. Từ khóa: Bã mía, Bê tông chịu uốn, Phế phẩm nông nghiệp, Tăng cường bê tông, Vật liệu xây dựng tái chế.Concrete, despite being a material with good compressive strength, often exhibits low tensile strength and is prone to cracking. After a period of use, concrete components typically begin to show cracks with significant width and density. Sugarcane bagasse fiber-reinforced concrete has been proposed as a method to improve the crack resistance of concrete structures, through mechanisms such as bridging cracks and stress transfer across them. A scientific study has presented the use of processed sugarcane bagasse in reinforced concrete beams (RC beams) to enhance their flexural capacity. Sample casting and experiments were conducted on four different mixtures with varying amounts of sugarcane bagasse. The research results indicate that the inclusion of sugarcane bagasse in concrete significantly improves the flexural capacity of RC beams and reduces the occurrence of cracks within them. Keywords: Bagasse, Flexural strength concrete, Agricultural waste, Concrete reinforcement, Recycled building materials.

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