Cracks

Asphalt concrete pavement often appears damaged such as rutting, fatigue crack, potholes, etc. at high air temperature, heavy rain in long time, or at locations with high traffic, large horizontal force, and poor-quality construction sites. T This paper presents an evaluation of shear bond strength of double-layer asphalt samples fabricated by shear test device with normal pressure.

8p viengfa 28-10-2024 2 1   Download

The aim of this paper is to find the appropriate mix-design for creating self-healing cementitious material in Vietnam conditions. Experimental results show that the mixture including bacillus subtilis and calcium lactate can be used for creating the self-healing cementitious materials.

8p viengfa 28-10-2024 3 1   Download

This paper presents the development of an Artificial Intelligence (AI) and Machine Learning (ML) model designed to detect cracks on concrete surfaces. The objective is to enhance the automation, precision, and performance of crack detection using the computer vision algorithm.

13p viengfa 28-10-2024 1 1   Download

In recent years, study on asphalt binder that provide strong rutting and cracking resistance is considered of great significance as it can help provide extended pavement life and significant cost savings in pavement construction in Vietnam. The purpose of this paper is to evaluate the performance characteristics of Korean modified asphalt binder in hot mix asphalt (HMA) mixture under Vietnam condition.

10p vibecca 01-10-2024 4 1   Download

In this paper, a Convolutional Neural Network (CNN) method is employed to classify the crack/noncrack aerial images captured on the surface of concrete structures. The CNN model was trained and validated using the available experimental data of 4000 previously published images.

4p vibecca 01-10-2024 1 1   Download

The evaluation described in this paper indicates the difference between the predicted p-y curves considering cracking and non-cracking concrete sections, as well as significant differences in lateral deflection and bending moment when non-linear bending stiffness is considered.

7p vibecca 01-10-2024 2 1   Download

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 1 0   Download

The article will focus on calculating the stability parameter of the plate depending on the number of cracks, crack length, crack inclination angle, elastic foundation parameters as well as the ratio of material composition in the plate.

13p vibecca 01-10-2024 0 0   Download

The paper's contributions can extend to optimizing concrete mixtures, formulating repair strategies, and improving structural assessments. Further research is suggested to improve the accuracy of simulations and investigate material properties under various conditions.

14p vibecca 01-10-2024 0 0   Download

The phase-field method has become a robust tool to describe the complex crack nucleation and propagation in heterogeneous materials. In these materials, an interaction between bulk brittle damage and interfacial damage through the splitting the strain tensor into a bulk strain part and a jump strain part at the interfaces.

15p vibecca 01-10-2024 2 0   Download

In recent times, the phase field method is a robust simulation tool that can predict crack formation and propagation in structures. In brittle and quasi-brittle materials, the strain tensor is decomposed into negative and positive parts corresponding to the compression and tension behaviors when the structure is loaded.

14p vibecca 01-10-2024 0 0   Download

Recently, researches have been used Artificial Neural Network (ANN) to predict the early-age thermal cracking of rectangle piers. But ANN has not resulted for different types of concrete piers. This article presents an evaluation of the early-age thermal characteristics of mass concrete piers with four distinct cross-sectional shapes.

11p vibecca 01-10-2024 2 0   Download

This work aims to study the crack pattern in masonry-like structures by a simplified description of the medium using a variational damage model. In literature, when modeling fractures in masonry structures, capturing both fracture types, cracks in units, and cracks at the interface simultaneously, usually requires a complicated scheme.

12p viyoko 01-10-2024 2 1   Download

Trong nghiên cứu này, tiềm năng của việc sản xuất nhiên liệu sinh học từ WCO bằng quá trình FCC sử dụng chất xúc tác SFCC được thử nghiệm và đánh giá. Ảnh hưởng của nhiệt độ, tỷ lệ chất xúc tác thải và dầu ăn thải (C/O) được nghiên cứu.

9p vikwong 29-09-2024 7 1   Download

Việc khai thác các nguồn tài nguyên hóa thạch nói chung và dầu mỏ nói riêng để phục vụ nhu cầu đời sống con người ngày càng cạn kiệt trữ lượng của chúng trong tự nhiên. Trong nghiên cứu này tổng hợp và đánh giá ảnh hưởng tỷ lệ Si/Al thay đổi cho quá trình trùng hợp hydro trên chất xúc tác Co-B/Al-SBA-15 cho phản ứng hydropolymer hóa ethylene.

8p vikwong 29-09-2024 4 1   Download

Bài viết nghiên cứu để định hướng ứng dụng tại các đơn vị đã có hệ thống nhiệt phân và nâng cấp hệ thống sẵn có để nhiệt phân nhựa tái chế, chúng tôi khảo sát quá trình nhiệt phân nhựa thải kết hợp với sử dụng xúc tác thải của quá trình cracking dầu cặn ( xúc tác FCC) đang thu gom tại nhà máy lọc dầu Dung Quất để cải thiện chất lượng của sản phẩm lỏng.

6p vikwong 29-09-2024 2 2   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

A big question in the numerical approaches for the mechanical behavior of the textile-reinforced concrete (TRC) composite under tensile loading is how to model the cracking of the cementitious matrix. This paper presents numerical results of 3-D modeling of TRC composite in which the non-linear behavior model was used by considering the cracking for the cementitious matrix.

12p vifilm 24-09-2024 1 1   Download

Drying shrinkage is the main cause of early age cracking of concrete and mortar. A wide range of research has been conducted to reduce the drying shrinkage, including using fibres or chemical admixtures. This paper investigated the effect of shrinkage reducing admixture on the flexural strength, compressive strength, drying shrinkage, water absorption and porosity of mortar.

13p vifilm 24-09-2024 2 1   Download

In comparison with fiber-reinforced polymer (FRP) composite, the textile-reinforced concrete (TRC) presents stability in mechanical performance at elevated temperatures thanks to a thermal protection layer by the cementitious matrix. This paper presents the experimental characterization and analytical modeling for fire performance of carbon TRC under the thermomechanical regime at constant tensile force.

12p vifilm 24-09-2024 4 1   Download