Journal of Building Materials and Structures

j. build. mater. struct.

Description

Journal of Building Materials and Structures (JBMS) is an open access, peer-reviewed journal, published by the University Amar Telidji-Laghouat, with no publication fee that publishes, in English, in all areas of building materials and engineering structures. The journal welcomes the submission of manuscripts that meet the general criteria of significance and academic excellence. JBMS offers a meeting targeted for specialists around the world to publish and discuss all topics related to the building materials and structures. From 2019, JBMS will publish 04 issues per year. JBMS topics include, but are not limited to: research on elaboration and characterization of building materials, experimental techniques and microstructural properties and structural engineering.

5

Volumes

10

Numéros

54

Articles


Behavior of Recycled Asphalt to the Fatigue

Bordjiba Abdelhak,  Guenfoud Hamza, 

Résumé: Climatic and traffic effects are the causes of aging of the surface layer of asphalt, which leads to the necessary renovation of the latter. The use of waste from the tread layer provides a viable and beneficial solution for the environment and the economy. However, this solution must meet the requirement of sustainable development, which necessitates that a road has a very long lifespan. In this study we investigated the performance of recycled asphalt in terms of fatigue (as an element of life-cycle control). All the formulas were tested by the fatigue test in order to define the influence of the proportions of the asphalt aggregates, penetrability of the new binder used, and the manufacturing temperature. The results obtained showed the relationship between the contribution binder (reproduced between the new binder and the old binder) and the fatigue resistance under the influence of the parameters that we have mentioned above. At the end an optimization study has been carried in order to determine exactly the doses required to formulate recycled asphalt resisted to fatigue, the optimization seeks to maximize the asphalt aggregates and minimized the temperature of manufacture with a class of the binder compatible.

Mots clés: Asphalt;fatigue; Binder; Environment; Penetrability


Development of High Thermal Stability Geopolymer Composites Enhanced by Nano Metakaolin.

El Nagar Abdeen,  Khater Hisham, 

Résumé: This paper deals with study of thermal stability of geopolymer composites enhanced by nano metakaolin materials and exposed to high firing temperature up to 1000 °C. The main geopolymer made up of water cooled slag having various kaolin ratios. The activators used are Na2SiO3 and NaOH in the ratio of 3:3. The thermo-physical, micro-structural and mechanical properties of the geopolymers before and after the exposure to elevated temperatures of 300, 500, 600 800 and 1000 °C have been investigated. The fire shrinkage of the geopolymer specimens increased by increasing temperature up to 1000 oC. Also, the fire shrinkage increased slowly up to 500 °C. The mechanical strength of geopolymer specimens increased with temperature up to 500 oC. The good thermo-physical and mechanical properties for these geopolymer composites increase the possibility of vast application of these eco-friendly materials in construction sectors.

Mots clés: firing shrinkage, geopolymer composites, slag, kaolin, nano metakaolin.