Nghiên cứu khả năng kết hợp cát tái chế từ đá xi măng và thuỷ tinh phát quang thay thế cát tự nhiên trong vữa xây dựng=Feasibility of incorporating waste hydrated cement paste and luminescent glass as sand replacement in mortars

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Tác giả: Ngọc Thạc Cao, Nguyễn Thanh Bình Đào, Minh Tuấn Hà, Tấn Thành Nguyễn, Văn Đoan Nguyễn, Bá Tùng Phạm

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học công nghệ xây dựng (Đại học Xây dựng Hà Nội), 2024

Mô tả vật lý: tr.156-173

Bộ sưu tập: Metadata

ID: 241705

Thêm vào giỏ

Nghiên cứu này khảo sát tính khả thi của việc kết hợp cát tái chế từ xi măng (gọi tắt là cát tái chế) và thuỷ tinh phát quang thay thế cho một phần của hàm lượng cát trong vữa thông thường. Cát tái chế được mô phỏng bằng xi măng đã hoàn toàn thuỷ hoá trong 56 ngày. Thuỷ tinh phát quang được chế tạo bôi bột phát quang với hạt thuỷ tinh Vữa cát tái chế - thuỷ tinh phát quang (LM) được chế tạo bằng cách thay thế 40% hàm lượng cát bằng thuỷ tinh phát quang và cát tái chế sẽ thay thế lần lượt 10-30% hàm lượng cát còn lại. Kết quả cho thấy các mẫu đều đạt cường độ khoảng 45 MPa vào 28 ngày tuổi và các đặc trưng cơ lý khác như độ lưu động, sự co ngót, độ rỗng đều thoả mãn yêu cầu kĩ thuật của vữa xây dựng. Các mẫu LM đều có cường độ ánh sáng hơn cường độ nhận biết của mắt thường trong 8 giờ. Qua đó, vữa cát tái chế – thuỷ tinh phát quang hoàn có thể được ứng dụng trong các công trình xây dựng, đặc biệt là các công trình phụ của kết cấu cầu đường.This study investigates the feasibility of incorporating waste hydrated cement paste (WHCP) and luminescent glass as sand replacements in conventional mortars. WHCP was simulated by cement particles totally hydrated after 56 days. Luminescent glass aggregates (LG) were produced by incorporating luminescent powder with glass pellets. WHCP-LG mortars (LM) were produced by replacing a fixed 40% amount of sand by LG while WHCP replaced the remaining amount of sand by 10-30%. Results showed that LM samples achieved a compressive strength of about 45 MPa at 28 days and the other physical properties such as flowability, drying shrinkage, and porosity all met the requirements of constructive mortars. All LM samples possessed the luminescent intensity higher than that noticed by human eyes for up to 8 h. Thereby, WHCP-LG mortars can be applied in construction projects, as auxiliary works for traffic structures.

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