Khả năng chế tạo bê tông nặng sử dụng bụi nhôm phế thải và chất kết dính Geopolymer từ nguồn vật liệu ở Việt Nam

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: NGỌC TRỤ VŨ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Xây dựng, 2024

Mô tả vật lý: tr.202

Bộ sưu tập: Metadata

ID: 452582

Thêm vào giỏ Liên kết toàn văn

Bài viết cho thấy tiềm năng chế tạo bê tông nặng sử dụng bụi nhôm phế thải và chất kết dính Geopolymer từ hỗn hợp phế thải công nghiệp ở Việt Nam. Trong đó, các thành phần bụi nhôm, tro bay nhiệt điện Mông Dương 2 và xỉ hạt lò cao nghiền mịn Hòa Phát được sử dụng như là vật liệu khoáng, dung dịch NaOH với nồng độ 12 M và Na2SiO3 có mô-đun silic 2,75 được sử dụng như là dung dịch kích hoạt. Ngoài ra, bụi nhôm cũng được sử dụng để khử bớt thành phần kiềm dư trong nghiên cứu này. Tỷ lệ giữa dung dịch kích hoạt với vật liệu khoáng được khảo sát là 0,40. Hàm lượng bụi nhôm, xỉ lò cao và tro bay đã khảo sát lần lượt là 10%, 30% và 60% hàm lượng vật liệu khoáng. Tính công tác của hỗn hợp bê tông được xác định bằng độ sụt trong côn hình nón cụt tiêu chuẩn và cường độ của mẫu thí nghiệm được xác định trên mẫu hình trụ kích thước 150x300 mm. Đồng thời, lực bám dính giữa bê tông và cốt thép được xác định theo 22 TCN 60-84. Kết quả thực nghiệm đã thu được hỗn hợp bê tông có độ sụt trung bình khoảng 14 cm, cường độ nén ở tuổi 28 ngày khoảng 49,02 MPa và cường độ lực dính giữa bê tông và cốt thép trungbình khoảng 15,66 MPa. Từ khóa: Bê tông nặng
bụi nhôm
tro bay
xỉ hạt lò cao nghiền mịn
dung dịch kích hoạt
cường độ nén.This article has shown the potential for making heavyweight concrete using waste aluminum dust and Geopolymer adhesive from a mixture of Vietnamese industrial waste. In particular, aluminum dust, fly ash from Mong Duong 02 thermal power plant, and Hoa Phat finely ground blast furnace slag are used as mineral materials. While NaOH solution with a concentration of 12 M and Na2SiO3 has a silicon module. 2.75 was used as the activating solution. In addition, aluminum dust was also used to reduce residual alkalinity in this study. The ratio between the activated solution and the mineral material investigated was 0.40. The investigated contents of aluminum dust, blast furnace slag, and fly ash were 10%, 30%, and 60% mineral material content, respectively. The workability of the concrete mixture is determined by the slump in a standard cone, and the strength of the test samples is determined on a cylindrical sample measuring 150x300 mm. At the same time, the adhesion force between heavyweight concrete and reinforcement is determined according to 22 TCN 60-84. Experimental results have shown that the concrete mixture has an average slump of about 14 cm, compressive strength at 28 days is about 49.02 MPa and average bond strength between concrete and reinforcement is about 15.66 MPa. Keywords: Heavyweight concrete
fly ash
franulated blast furnace slag
flkali-activator
compressive strength.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR