Evaluation of the performance of local cement for oil well cementing operations in Algeria

The cementing of oil wells is done using special cement called ‘’class G cement’’, whose properties should meet the requirements of the American Petroleum Institute (API). Algeria, which ranks high among the oil and gas producing countries, has recently begun production of petroleum cement. The aim of this work is to characterize and evaluate the performance of a locally manufactured cement sample intended for oil and gas well cementing operations in Algeria. In this paper, significant properties (thickening time, compressive strength and free water) as well as the rheological behavior of the cement slurry under specific conditions have been experimentally examined. Apart from the initial consistency, which could be resolved by incorporating additives, the results indicated that the locally produced cement meets the requirements of the API standards and can therefore be used for cementing oil and gas wells

Evaluation of the performance of local cement for oil well cementing operations in Algeria

The cementing of oil wells is done using special cement called ‘’class G cement’’, whose properties should meet the requirements of the American Petroleum Institute (API). Algeria, which ranks high among the oil and gas producing countries, has recently begun production of petroleum cement. The aim of this work is to characterize and evaluate the performance of a locally manufactured cement sample intended for oil and gas well cementing operations in Algeria. In this paper, significant properties (thickening time, compressive strength and free water) as well as the rheological behavior of the cement slurry under specific conditions have been experimentally examined. Apart from the initial consistency, which could be resolved by incorporating additives, the results indicated that the locally produced cement meets the requirements of the API standards and can therefore be used for cementing oil and gas wells

Elaboration et caractérisation d'un matériau composite à base de fibres de verre et de résine polyester et étude de son comportement au choc

111 p. : ill. ; 30 cmCe travail a pour objet d'étudier les caractéristiques mécanique en flexion 3 points, en traction et en compression; en statique; et du comportement au choc de différents stratifiés constitués du mat et du tissé en fibres de verre et de résine polyester. L'étude des caractéristiques mécanique a permis de voir l'effet de type des fibres de verre ( mat et tissé) ainsi que leurs associations sur la qualité du matériau obtenu. L'analyse des résultats des essais menés sur cinq types de stratifiés montre la meilleur variante qui donne les performances mécanique les plus élevée

Effectiveness Assessment of Superplasticizer Admixtures: Case of Self-compacting Concrete Reinforced with Fine Mineral Fillers

The use of superplasticizers in concrete production has become a common practice, especially when a high fluidity is required. On the other hand, the risk of segregation and the stability of these mixtures is ensured by the incorporation of a large volume of fine mineral additions. The present investigation is devoted to the study of the influence of three types of superplasticizers of different chemical compositions, namely: Combined Synthetic Polymers (CSP), Poly-Carboxylate Ether (PCE), and Modified Poly-Carboxylate Ether (MPCE) on the rheological behavior of self-compacting concrete (SCC) as well as on the mechanical properties at 3, 7, and 28 days of curing. Natural pozzolana (NP) and ground granulated blast furnace slag (GGBFS) were used as additions to stabilize the mixtures. The results revealed that the ether-based superplasticizer PCE gave the best workability and mechanical performance with low amounts (high efficiency). In addition, blast furnace slag promotes the obtaining of better properties whether in the fresh or hardened state compared to natural pozzolana

Plastic waste for the enhancement of concrete properties - a review

The consumption of different forms of plastics is interesting to the environmental protection subject. The increasing use of plastics in many areas of human daily life results in the accumulation of plastic waste in the environment. The introduction of plastic waste in concrete is a solution to preserve the environment and reduce the cost of concrete. This paper presents an overview of some published research regarding the use of waste plastic in concrete. we present the work of many researchers on the valorization of plastic waste in concrete in different forms as a partial replacement of fine and coarse aggregate as well as fibers and their effects of waste plastic addition on the fresh, mechanical, and durability of concrete. The research work seems interesting, which shows the possibility of recycling plastic waste in concrete. However, it will be interesting to explore the combined uses of plastic as aggregate and fiber in concrete, which allows a possible recovery of additional quantities of plastic waste in concrete