Các tính chất kỹ thuật của chất kết dính sulfate hoạt hóa được chế tạo từ các hàm lượng khác nhau của tro bay và xỉ lò cao nghiền mịn

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Minh Toan Bui, Si Lanh Ho, Trong Phuoc Huynh, Minh Hung Ky, Van Anh Ngo, Le Kim Ngoc Nguyen

Ngôn ngữ: vie

Ký hiệu phân loại: 552.22 Lava

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ (Đại học Đà Nẵng), 2022

Mô tả vật lý: 79-83

Bộ sưu tập: Metadata

ID: 500577

Thêm vào giỏ

Finding new eco-binders as an alternative to conventional Portland cement in construction activities has recently attracted many researchers worldwide. The feasibility of activating blended fly ash (FA)-ground granulated blast-furnace slag (GGBFS) by commercial Na2SO4 to produce sulfate-activated binder (SAB) was introduced in this study. The SAB samples were prepared with different FA/GGBFS weight ratios of 5/95, 10/90, 15/85, 20/80, and 30/70. Results show that the SAB mixtures exhibited better flowability with more FA inclusion. Before 7 days, the mechanical strength of the SAB samples declined with increasing FA content. However, the samples with 20 and 30% FA exhibited higher strength values at 28 days. Water absorption of the SAB samples was in the ranges of 12.29 - 14.11%. Besides, the inclusion of more FA was beneficial in reducing the drying shrinkage of the SAB samples. The FA/GGBFS ratio of 30/70 was recommended for producing SAB for green and sustainable construction.Việc nghiên cứu chất kết dính mới thân thiện hơn với môi trường để thay thế cho xi măng Poóclăng truyền thống trong các hoạt động xây dựng đã thu hút nhiều nhà nghiên cứu trên thế giới. Tiềm năng của việc hoạt hóa hỗn hợp tro bay (FA)-xỉ lò cao nghiền mịn (GGBFS) bằng Na2SO4 công nghiệp để sản xuất chất kết dính sulfate hoạt hóa (SAB) được giới thiệu trong nghiên cứu này. Các mẫu SAB được chuẩn bị với các tỷ lệ FA/GGBFS (theo khối lượng) là 5/95, 10/90, 15/85, 20/80 và 30/70. Kết quả cho thấy hỗn hợp SAB thể hiện khả năng chảy tốt hơn với hàm lượng FA cao hơn. Trước 7 ngày, cường độ của các mẫu SAB giảm khi hàm lượng FA tăng. Tuy nhiên, cường độ của các mẫu SAB chứa 20 và 30% FA có xu hướng tăng lên ở 28 ngày tuổi. Độ hút nước của các mẫu SAB ở 28 ngày dao động từ 12,29% đến 14,11%. Bên cạnh đó, sử dụng nhiều FA mang lại hiệu quả tích cực trong việc giảm độ co khô của các mẫu SAB. Tỷ lệ FA/GGBFS = 30/70 được khuyến nghị để sản xuất SAB cho mục đích xây dựng bền vững.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR