Journals / JRM / Vol.8, No.11


    Multi-Scale Investigation on Concrete Prepared with Recycled Aggregates from Different Parent Concrete

    Zhenhua Duan, Nv Han, Amardeep Singh, Jianzhuang Xiao*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1375-1390, 2020, DOI:10.32604/jrm.2020.013044
    Abstract Recycled aggregates (RA) are frequently obtained from various unknown sources, which caused variation in properties among recycled aggre- gates concrete (RAC). This paper investigated the macro and microscopic proper- ties of RAC prepared with RAs originated from different parent concretes with 90-day strength ranging from 30 MPa to 100 MPa. These parent concretes were prepared in advance and crushed to produce RA of distinct qualities. The attached mortar content can reach up to 69% in the concrete with highest strength grade. The microscopic investigation on different RAC was conducted with the X-ray Micro-Computed Tomography scanning technique and image process. Experi-… More >


    Optimization of Roots and Copper Slag to Reinforce Soft Soil Using Response Surface Method

    Dingbang Zhang1, Yi Zhang2,*, Zhiguo Cao3, Tao Cheng1
    Journal of Renewable Materials, Vol.8, No.11, pp. 1391-1409, 2020, DOI:10.32604/jrm.2020.012695
    Abstract In this paper, roots and copper slag were used to overcome the weak- ness and reinforce the mechanical property of soft soil. The experiments were designed by the Response Surface Method (RSM), the content optimizing of the root permeated copper slag mixed soil for achieving appropriate values of shear strength and the final results evaluating were also conducted by RSM. Four independent variables including moisture content (12–21% by dry weight of the mixture), slag content (10–20% by dry weight of the mixture), roots content (0–1.1% by dry weight of the mixture), and aspect ratio of roots L/d (5–40) were studied… More >


    Investigate the Effect of the Magnetic Field on the Mechanical Properties of Silicone Rubber-Based Anisotropic Magnetorheological Elastomer during Curing Process

    Tao Li1,2, Ali Abd El-Aty1,2,4, Cheng Cheng1,2, Yizhou Shen1,2, Cong Wu1,2, Qiucheng Yang1,2, Shenghan Hu1,2, Yong Xu3, Jie Tao1,2,*, Xunzhong Guo1,2,*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1411-1427, 2020, DOI:10.32604/jrm.2020.012939
    Abstract In this investigation, a new silicone rubber-based MRE material was prepared to be used as a forming medium in manufacturing thin-walled complex- shaped Ni-based tubes through the bulging process. Thus, it is significant to investigate the effect of magnetic field intensity, magnetic field loading time, and angle on the mechanical properties of the prepared MRE material during the curing process. The obtained results showed that increasing the magnetic field intensity during the curing process can improve the orientation of the chain structure in the elastomer matrix effectively. However, its mechanical properties are the best under the corresponding magnetic field intensity… More >


    An Eco-Friendly Wood Adhesive from Alfalfa Leaf Protein

    Bengang Zhang1,2,#, Xuedong Xi3,#, Zhigang Wu1,*, Hong Lei2,*, Lifen Li1, Meifen Tian1
    Journal of Renewable Materials, Vol.8, No.11, pp. 1429-1441, 2020, DOI:10.32604/jrm.2020.011985
    (This article belongs to this Special Issue: Renewable and Biosourced Adhesives)
    Abstract According to the preparation method commonly used for soy proteinbased adhesives, alfalfa leaf protein was used as the raw material to prepare alfalfa leaf protein-based wood adhesive. Differential scanning calorimetry analyzer (DSC), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) were used to characterize properties of the alfalfa leaf protein-based adhesive in this paper. The results revealed the following: (1) Chemical compositions and chemical structures of the alfalfa leaf protein were basically identical with those of the soy protein, both belonging to spherical proteins with the basis and potential for protein adhesives preparation, and spatial cross-linked network structures would… More >


    Fabrication and Application of CeO2 Nanostructure with Different Morphologies: A Review

    Xiaofei Cao1, Shuo Zhao1, ShuJun Yan2, Jun Hu1,*, Yong Dan1,*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1443-1472, 2020, DOI:10.32604/jrm.2020.012113
    (This article belongs to this Special Issue: Green Coating and Film for Degeneration Protection)
    Abstract CeO2, as a significant functional material, Has a widespread application in many fields due to its excellent properties. In this review, we sum up a serious of methods to prepare and differentiate nanostructured cerium oxide with various morphologies based on dimensionality and its main applications in industry. We mainly summary the different strategies to synthetic the CeO2 with 0-D, 1-D, 2-D and 3-D and the key parameters which may affect the nanostructures. We hope that this review helps researchers master can look up CeO2 related knowledge more quickly upon the synthetic methods and comparing various morphologies or fabricating ways to… More >


    Preparation and Characterization of Phenolic Prepolymer Impregnated Chinese Fir by Cyclic Increasing-Pressure Method with Green and Efficient

    Yuan Zhang1, Ping Li1, Yiqiang Wu1,2, Guangming Yuan1,2, Xianjun Li1,2, Yingfeng Zuo1,2,*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1473-1488, 2020, DOI:10.32604/jrm.2020.011788
    (This article belongs to this Special Issue: Renewable building materials and properties)
    Abstract The Chinese fir wood was impregnated using a cyclic increasingpressure method (CIPM) with phenolic prepolymers as the impregnating modifier. Unmodified Chinese fir and progressive increasing-pressure method (PIPM) impregnated Chinese fir were used as reference samples and were compared and analyzed. The product’s chemical structure, internal morphology, crystal structure, and heat resistance were characterized. The transversal and longitudinal sections showed better filling effects, so that it bore greater external loading and reduced the water storage space. CIPM infused more phenolic prepolymer into the Chinese fir. Not only producing more physical filling but also forming more hydrogen bond associations and chemical bond… More >


    Chitosan and Carboxymethylchitosan as High Turbidity Water Biocoagulants

    Raimundo N. Lima Júnior1, João L. I. O. Almeida1, Jones de Andrade2, Flávia O. M. S. Abreu1,*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1489-1504, 2020, DOI:10.32604/jrm.2020.011629
    (This article belongs to this Special Issue: 15th Brazilian Polymer Conference (15th CBPol))
    Abstract Biocoagulants emerges as a promising technology in water treatment, in order to exploit renewable and biodegradable materials. The present work aims to study the coagulant action of chitosan and carboxymethylchitosan on water with very high turbidity (above 300 NTU), contrasting the physicochemical results with those obtained for aluminum sulphate. Carboxymethylchitosan was produced by the Williamson’s ethers synthesis and characterized by potentiometric titration, FTIR and 1 H-NMR. The coagulant tests were performed using synthetic water in a Jar-test equipment, through the induction of high and low velocity gradients, followed by sedimentation. The results showed turbidity and color removal efficiencies above 99%… More >


    Properties of ABS/Organic-Attapulgite Nanocomposites Parts Fabricated by Fused Deposition Modeling

    Ling Wang1,2, Shenglong Jiang2, Chenchen Huang2, Pengyuan Dai2, Fenghua Liu2,*, Xiaopeng Qi1, Gaojie Xu2
    Journal of Renewable Materials, Vol.8, No.11, pp. 1505-1518, 2020, DOI:10.32604/jrm.2020.010544
    (This article belongs to this Special Issue: Current Advances in Green Nanomaterials Applications)
    Abstract The paper discusses the mechanical and thermal performance manifested in natural nanorods attapulgite (ATP) reinforced Acrylonitrile butadiene styrene (ABS) nanocomposites in the process of fused deposition modeling (FDM). Molten extrusion technique was taken to manufacture the filaments of ABS/organic-attapulgite (OAT) nanocomposites with different mass fraction and the printing operation was made by one commercial FDM three-dimensional (3D) printer. Results indicate that the mechanical performance of these FDM 3D printed specimens are improved obviously via the introduction of OAT, and tensile strength of the ABS/OAT nanocomposites parts with only 2 wt% OAT addition is enhanced by 48.1%. At the same time,… More >


    Alleviation of Drought Stress in Wheat Using Exogenous Ulva prolifera Extract Produced by Enzymatic Hydrolysis

    Feiyu Li1, Siqi Zuo1, Yongzhou Chi1, Chunying Du1, Zhaopeng Shen1, Xihong Han2,3, Xiaohui Wang2,*, Peng Wang1,*
    Journal of Renewable Materials, Vol.8, No.11, pp. 1519-1529, 2020, DOI:10.32604/jrm.2020.011453
    (This article belongs to this Special Issue: Renewable materials for sustainable development)
    Abstract Drought is one of the major abiotic stresses that affect plant growth and reduce agricultural productivity. Use of algal extract as a biostimulant is gaining increased attention from researchers. This study aimed to investigate the potential of Ulva prolifera extract (UE) as a biostimulant when enzymatically extracted under conditions of water deficit. UE treatments (0.02%, 0.06%, and 0.1%) significantly improved the shoot length, root length, and dry weight of roots after 120 h of drought stress relative to that in treatment with the negative control. An increase in catalase (CAT) and peroxidase (POD) activity was also observed that resulted in… More >


    Utilization of Bayer Red Mud Derived from Bauxite for Belite-Ferroaluminate Cement Production

    Yanrong Zhao1,2,3,#, Ping Chen1,4,*,#, Shifeng Wang5, Yaxiong Ji3,4, Yuanhao Wang3,4,*, Bolin Wu1,2, Rongjin Liu1
    Journal of Renewable Materials, Vol.8, No.11, pp. 1531-1541, 2020, DOI:10.32604/jrm.2020.011462
    Abstract Bayer red mud (BRM) is a kind of industrial solid waste characterized by huge volume and high alkalinity. Its disposal generates serious environmental pollution and occupies a large number of farmland. The utilization and recycling of BRM is currently a crucial issue and needs to be addressed as soon as possible. The chemical composition of BRM is similar to cement clinker. In this study, the feasibility of preparing Belite-ferroaluminate clinker (BFAC) with different BRM was explored. The physical properties, mechanics performance, radioactivity levels and trace harmful metals leaching were measured. XRD, BEI and EDS were used to characterize the mineral… More >

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