Nghiên cứu chế tạo bê tông epoxy dùng trong sửa chữa nông mặt đường bê tông xi măng

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Tác giả: Quốc Cường Hoàng, Anh Tuấn Nguyễn, Thị Thu Trang Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 666.8 Synthetic and artificial minerals and building materials

Thông tin xuất bản: Giao thông vận tải, 2018

Mô tả vật lý: 53-56

Bộ sưu tập: Metadata

ID: 536239

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Hard surface of cement concrete has high strength, long service life, good water resistance, is less affected by adverse weather and climatic conditions, using domestic materials. Therefore, it has been being used on many high-level roads and highways in our country, especially the sections with adverse hydrothermal regimes, the flood season flood sections ... However, This type of pavement, when damaged, is difficult to repair, the repairing time is often prolonged (if using traditional portland cement original materials), causing disruption of traffic, short repair life (there is sticky problem). adhesion between repair material and old pavement concrete). This is a problem that has been concerned by scientists and specialized research institutes at home and abroad. Through this article, the authors introduce some experimental results of mechanical properties of epoxy concrete for shallow surface repair of cement concrete pavement in Vietnam. The initial research results show that, with the proposed material, it can achieve good adhesion to old pavement concrete with a repair time of less than 2 hours.Mặt đường cứng bê tông xi măng có cường độ cao, tuổi thọ lâu dài, chịu nước tốt, ít bị tác động của điều kiện thời tiết và khí hậu bất lợi, sử dụng vật liệu nội địa. Do đó, nó đã và đang được sử dụng trên nhiều tuyến đường cấp cao và đường cao tốc ở nước ta, đặc biệt là các đoạn có chế độ thủy nhiệt bất lợi, các đoạn ngập lụt về mùa lũ... Tuy nhiên, loại mặt đường này khi đã hư hỏng thì khó sửa chữa, thời gian sửa chữa thường kéo dài ( nếu dùng vật liệu truyền thống gốc xi măng portland thông thường) gây gián đoạn giao thông, tuổi thọ sửa chữa ngắn (dó vấn đề dính bám giữa vật liệu sửa chữa và bê tông mặt đường cũ). Đây là vấn đề đã và đang được các nhà khoa học, viện nghiên cứu chuyên ngành trong và ngoài nước quan tâm. Qua bài báo này, các tác giả giới thiệu một số kết quả nghiên cứu thực nghiệm các đặc tính cơ học của bê tông epoxy dùng cho sửa chữa nông mặt đường bê tông xi măng ở Việt Nam. Các kết quả nghiên cứu ban đầu cho thấy, với loại vật liệu đề xuất có thể đạt độ dính bám tốt với bê tông mặt đường cũ với thời gian sửa chữa dưới 2 giờ.

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