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Annales de Chimie-Science des Materiaux
Masson
Annales de Chimie-Science des Materiaux

Masson

0151-9107

Annales de Chimie-Science des Materiaux/Journal Annales de Chimie-Science des MateriauxSCIISTPICESCI
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    Influence of Recycled Plastic Waste and Cement on Pavement Sub-Base Stabilization

    Ziani, HocineDeboucha, SadekAmriou, AbderrachidTouati, Hayat...
    7页
    查看更多>>摘要：The use of recycled waste in road construction is part of the sustainable development of countries. Plastic waste poses an ecological problem because it is not biodegradable. Recycling this waste to reuse it in different areas seems to be a solution to reduce it. This article is devoted to the use of varieties of additions of recycled plastic waste (RPW) (5 and 10%) without and with Portland cement compound (PCC) (2 and 4%) moistened at the Proctor optimum , to stabilize the foundation layer of the section of the road connecting the highway at the Tixter dry port (Algeria). The results showed , that RPW increases the CBR (California Bearing Ration) of S0 approximately to 139.32% , however the use of 5% of RPW with 2% of PCC raises the CBR of the soil to 386.59% in unsoaked samples and 404.54% in soaked samples. Whereas , UCS (Unconfined Compressive Strength) tests , is marked by increases in compressive strength from 0 to1471.18 KPa and from 754.67KPa to 2051.53KPa of samples dosed with 5% RPW and 4% PCC , soaked and unsoaked respectively. This study offers the opportunity to find the right soil-RPW-PCC combination to stabilize future roads.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc

    Wet Chemical Synthesis of Sb4O5Cl2 Used as an Effective Photocatalyst for Methylene Blue and Crystal Violet Degradation under Visible Light Irradiation

    Makhloufi, RachidHachani, Salah EddineFettah, AsmaMessai, Bahia...
    6页
    查看更多>>摘要：The present scientific contribution aims to elaborate antimony oxychloride Sb4O5Cl2 via a wet chemistry method and to study its photocatalytic activity to degrade methylene blue and crystal violet cationic dyes. The prepared samples were characterized using powder X-ray diffraction PXRD, Fourier transform infrared spectroscopy FTIR, Scanning electron microscopy analysis SEM and UV-Visible measurements. PXRD results revealed that the Sb4O5Cl2 was successfully formed in a monoclinic phase structure with P2(1)/a space group. FTIR results show the presence of all characteristic bands that distinguished the prepared compound mainly include Sb-O, Sb-O-Sb, and Sb=O vibrating modes bands located at 503, 607, and 832 cm(-1), respectively. SEM micrograph showed that the microstructure of the prepared antimony oxychloride is composed of particles with sand rose morphology. UV-Visible outcomes demonstrated that our synthesized Sb4O5Cl2 is an efficient photocatalyst for the degradation of both methylene blue MB and crystal violet CV targeted dyes. MB degradation reached 93.67% after 30 min while CV degradation up to 92.56% after 360 min.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc

    Investigation of Dynamic Factors in Different Sections of HVC by Static and Free Vibration Modal Analysis

    Agarwal, AbhishekMthembu, Linda
    10页
    查看更多>>摘要：One of the essential purposes of the automotive chassis is to maintain the vehicle's shape and bear the various loads applied to the vehicle. When a heavy-duty vehicle, e.g., a truck, travels on the road, the chassis is subject to vibrations produced by surface roughness and excitation due to the vibration of body parts. The present study aims to design, model, and perform a static structural & vibrational modal analysis on a commercial vehicle (Truck) chassis considering both conventional Structural steel and P100/6061 Al Metal Metrix Composite (MMC) using ANSYS CFX to determine the strength of chassis with transverse sections. Free vibrational modal analysis determines the mass participation factor and resonance frequency for square section and C section, respectively, for both materials using the finite element technique. It was observed that the use of the C section causes an increase in deformation for all the natural frequencies, which is not preferred. The high mass participation factor along the x-direction signifies that any external excitation along this direction would likely cause resonance and amplitude build-up. The C section profile of the chassis shows 1.69% higher deformation than the square section in both cases; hence it is not desirable for the design.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc

    Characterization and Modeling Using Non-Destructive Test (NDT) and Experimental Design Methods of a Self Compacting Concrete (SCC) Based on Mineral Additions

    Allali, IbtissemBelagraa, LarbiBeddar, MiloudKessal, Oussama...
    10页
    查看更多>>摘要：The formulation of an innovative concrete that meets the requirements of a selfcompacting concrete (SCC), with acceptable performance in terms of rheology in the fresh state; good fluidity, ease of placing, without segregation as well as good mechanical strength and durability at hardened state has become of great research interest for the last decades. Numerous studies have shown the favorable effects of limestone fillers on the SCC properties. This study aims at investigating the effect of inert mineral addition of limestone fillers with dosages of 10% and 20% grinded to different fine nesses 2000, 3000 and 4000 cm2/g on the physico-mechanical properties of a fresh self-placing concrete using slump, the L-box and the sieve stability tests. Also, the means of destructive and non-destructive tests (NDT) methods to the assessment of the mechanical performances of SCC at hardened state were used. The use of experiment factorial design method allows us to have behavior laws to predict the mechanical strength response when combined with (NDT) according to a numerical model in such study. Hence, a numerical modeling of mechanical response could be derived by such statistical analysis in regards to the effects of factors and their interaction. The results obtained showed that the incorporation of limestone filler in the composition of the SCC improves the fluidity with limited segregation, as well as the good mechanical performances (resistance to compression and flexion). The numerical modeling of the predicted compressive strength response, in particular at the age of 28 days, is judged to be with an acceptable determined coefficient R2 equal to 0.994.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc

    Effects of Hydrothermal Aging on the Breakdown Voltage of Polyesterimide

    Ben Saidj, IdirNedjar, MohammedHocine, SmainBelabbas, Ferhat...
    8页
    查看更多>>摘要：Polymers have always played a big role in the insulation of electrical machines and have been the focus of several studies when they are subjected to different stresses. The humidity and temperature are the main constraints that degrade the insulating performance of the materials when they act together causing hydrothermal aging of the polymers. This study deals with the influence of hydrothermal aging on the breakdown voltage of polyesterimide which is known as one of the most important factors which define the electrical insulation performance of the polymer. The breakdown test was executed under AC and DC voltage. A statistical analysis of breakdown data was carried out using the two-parameter Weibull distribution. According to the findings, the breakdown voltage changes with aging time. Its rise is due to a polymer crosslinking by thermal action, causing a reduction of the mean-free path of charge carriers decreasing their mobility. The decline is attributed to the material plasticization after water penetration into the polymer matrix at the beginning of aging, which is a physical effect. Eventually, the chemical effect reflects the hydrolysis reaction, which destroys the hydrogenous links of the polymer. The breakdown voltage under the DC ramp is higher than that obtained under the AC ramp. The DC breakdown voltage depends on the polarity of the applied electrical field. The polymer degradation is characterized by a change in color and the crumbling of samples.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc

    Nitride Materials: Synthesis, Crystal Structures, and Optical Properties

    Kerdoud, DjahidaBenkafada, FaouziaBoussouf, NoraBenhamideche, Chahrazed...
    6页
    查看更多>>摘要：Our research involves the preparation of transition metal nitrides of the composition Mn4N, NbN, Mo2N, TaN and ZrN. The synthesis of Li3N binary alkali metal nitride was also part of this work. Simple and cost-effective methods with relatively low impact on the environment have been privileged in the selection. The experimental work has focused on determining the optimum conditions of synthesis and the convenient high yield route to the desired nitrides, and ultimately improvement of the properties of the final materials. All samples were characterised by X-ray powder diffraction. Their structures will be discussed in more detail here. Optical band gap has been calculated from diffuse reflectance measurements. The air sensitivity of the nitrides was also probed.
      原文链接:
    • NSTL
    • Int Information & Engineering Technology Assoc