Nghiên cứu giải pháp sơn phủ bảo vệ cốt thép trong bê tông cát nhiễm mặn

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Tác giả: Nam Thắng Nguyễn, Văn Chương Phan

Ngôn ngữ: Vie

Ký hiệu phân loại: 624 Civil engineering

Thông tin xuất bản: Tạp chí Khoa học Công nghệ Xây dựng, 2022

Mô tả vật lý: 43-49

Bộ sưu tập: Metadata

ID: 416883

Thêm vào giỏ Liên kết toàn văn

Kết quả nghiên cứu, khảo sát, đánh giá một số công trình đã sử dụng cát nhiễm mặn cho kết cấu bê tông cốt thép (BTCT) cho thấy cốt thép thường bị ăn mòn sớm. Cát nhiễm mặn sử dụng cho kết cấu BTCT trong công trình dân dụng cần đảm bảo đồng thời các yêu cầu kỹ thuật chống ăn mòn (chất lượng bê tông, độ chống thấm nước, chiều dày lớp bê tông bảo vệ...) và giải pháp bảo vệ hỗ trợ phù hợp vì thông thường hàm lượng clorua trong cát nhiễm mặn cao hơn theo quy định. Tuy nhiên hiện nay chưa có tiêu chuẩn hay chỉ dẫn kỹ thuật nào quy định vấn đề sử dụng cát nhiễm mặn. Bài báo này xem xét đến khả năng sử dụng cát nhiễm mặn cho kết cấu BTCT trên cơ sở khảo sát một số tính chất cơ lý của cát
nghiên cứu một số giải pháp bảo vệ chống ăn mòn cho cốt thép như sơn, chất ức chế đem lại hiệu quả chống ăn mòn và phù hợp với tiêu chuẩn và đề xuất giải pháp bảo vệ cốt thép trên công trình., Tóm tắt tiếng anh, The results of some researches, investigation, and evaluation of various projects, which was use saline sand for concrete structures, indicated that reinforcement often corroded prematurely. The saline sand used for concrete structures in the civil projects must be ensure both technical requirements for anti-corrosion (concrete quality, waterproofing, thickness of the cover layer...) and appropriate supportive protection method, because normally the chloride content in sand is higher than regulations. However, nowadays, there are not have any standards or technical recommendations mentioned this problem. This paper considerred posibility of using saline sand as aggregate for concrete structures based on investigation of some mechanical properties of sand, studied several corrosion protection for reinforcement as coating reinforced, inhibitors provide effective anti-corrosion accordance with the standard, and proposed solutions protecting reinforcement in the projects.

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