Micro cracks

Layered structures are widely used in construction, such as pavement structures consisting of multiple layers of different materials or interfaces between bricks and mortar in masonry structures, etc. In analyzing such structures, understanding the properties of the interface between two layers of materials is essential.

15p vibecca 01-10-2024 2 1   Download

The main objectives of this research work are as follows: (i) to explore the sensitivity of macro, meso and micro fibers to tensile and compressive properties of SFCs, and (ii) to correlate the tensile strength to compressive strength of SFCs containing macro, meso and micro steel-smooth fibers.

12p vifilm 24-09-2024 4 1   Download

Tensile properties of strain-hardening fiber-reinforced concrete are the key engineering parameters in determining bending resistance of the material. In this paper, an analytical model to predict tensile properties of ultra-high-performance fiber-reinforced concrete (UHPFRC), a type of strain-hardening fiber-reinforced concretes, was performed based on single fiber pullout test.

13p vifaye 20-09-2024 1 1   Download

Steel fiber reinforced concrete (SFRC) is a multiple-composite material developed during the early 1970s. In SFRC, short steel fibers are randomly distributed in concrete. Steel fibers can prevent the development of micro-cracks inside the concrete and reduce the expansion and development of the macro-cracks, thus enhance mechanical performance of SFRC. However, there is lack of studies on the influence of flowability of fresh SFRC on the steel fiber distribution patterns and mechanical properties of hardened SFRC.

85p runthenight04 02-02-2023 6 4   Download

In this paper, butt joining of Al5083 to commercially pure copper is investigated by friction stir welding method. The effects of transverse welding speed of the tool on the mechanical properties and microstructure of the joint were studied, experimentally.

8p tohitohi 19-05-2020 13 2   Download

Quá trình cracking xúc tác là quá trình sản xuất xăng quan trọng nhất trong nhà máy lọc dầu. Việc lựa chọn xúc tác, nguyên liệu cho quá trình FCC quyết định chất lượng, suất lượng sản phẩm của quá trình. Phương pháp MAT (Micro Activity Test) - ASTM D 3907 dùng để xác định hoạt tính, độ lựa chọn của xúc tác FCC cân bằng sử dụng nguyên liệu chuẩn, bên cạnh đó, nó còn được dùng để đánh giá xúc tác đã được giảm hoạt tính cũng như đánh giá nguyên liệu cho quá trình.

5p uocvong04 24-09-2015 125 10   Download

The effects of addition of alumina to the matrices of cracking catalysts containing different types of zeolite Y, on their cracking performance, were investigated using a micro activity test and two different feed oils.

13p tuananhhumg 04-11-2013 50 3   Download