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  • Open Access


    An Experimental Study of Composite Columns Filled with Eucalyptus nitens Timber under Axial Compression

    Yingyao Cheng1,2, Xudong Chen3, Huaming An1,*, Huimin Wang2,4, Kai Tao2,5

    Journal of Renewable Materials, Vol.11, No.2, pp. 825-836, 2023, DOI:10.32604/jrm.2022.022599

    Abstract Eucalyptus nitens (E. nitens) has been much used for producing paper but also shows promise for structural applications. In this study, static compressive tests were undertaken to examine its suitability to be used in an innovative composite column. The composite column was comprised of a rectangular steel tube with E. nitens timber infill. The nonlinear compressive behaviour of the composite column filled with E. nitens wood for both dry and wet conditions was examined. The same tests on rectangular steel tubes and bare dry and wet E. nitens samples were also undertaken as a comparison. For samples with different conditions,… More > Graphic Abstract

    An Experimental Study of Composite Columns Filled with <i>Eucalyptus nitens</i> Timber under Axial Compression

  • Open Access


    Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

    Yuanchu Liu, Xiaodong Zhu, Zhengmin Jin, Yingying Liu, Qingjian Wei, Bonan Liang, Yingchun Cai*, Jingyao Zhao*

    Journal of Renewable Materials, Vol.11, No.2, pp. 567-580, 2023, DOI:10.32604/jrm.2022.023037

    Abstract In this paper, the occurrence and development mechanism of strain on the cross-section during the wood drying is explored. Therefore, strain regularity on the cross-section of 50 mm thickness elm (Ulmus rubra) board at the temperature of 40°C and 80°C is detected via digital image correlation technology. Hence, the difference between tangential and radial strain at surface and core layers was denoted. The results showed that strain distribution in the width direction of the board is uneven. Moreover, a large drying shrinkage strain occurs at the near-core layer, while the maximum strain difference reaches 4.08%. Hence, the surface of the… More > Graphic Abstract

    Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

  • Open Access


    Utilization of Dredged River Sediment in Preparing Autoclaved Aerated Concrete Blocks

    Kai Zhang1,2, Qunshan Wei1,2,*, Shuai Jiang3, Zhemin Shen4, Yanxia Zhang1,2, Rui Tang1,2, Aiwu Yang1,2, Christopher W. K. Chow5

    Journal of Renewable Materials, Vol.10, No.11, pp. 2989-3008, 2022, DOI:10.32604/jrm.2022.019821

    Abstract In this study, the dredged river sediment, soft texture and fine particles, is mixed with other materials and transformed into eco-friendly autoclaved aerated concrete (hereinafter referred to as AAC) blocks. The results indicated the bricks produced under the conditions of 30%–34% dredged river sediment, 24% cement, 10% quick lime, 30% fly ash, 2% gypsum and 0.09% aluminum powder with 0.5 water to material ratio, 2.2 MPa autoclave pressure and 6 h autoclave time, the average compressive strength of 4.5 MPa and average dry density of 716.56 kg/m³ were obtained, the two parameters (strength & density) both met the requirement of… More >

  • Open Access


    Optimization of Organic Mulches Thickness Improves Soil Moisture Retention under Controlled Conditions

    Jiayi Zhang1, Guohua Fu2, Zhiyang Jin3, Lihang Chi1, Guocheng Xu1, Daran Yue1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 841-857, 2022, DOI:10.32604/phyton.2022.017938

    Abstract Organic mulch can improve the moisture, chemical composition, dust, and dust suppression of soil, and beautify the environment. In view of the rapid evaporation rate and serious loss of soil water in tropical areas, this paper explored the effect of organic mulch materials with different thickness on the increase of soil water retention rate and the improvement of soil water loss caused by evaporation. Rubberwood sawdust (RWS), rubberwood bark (RWB), coconut fiber (CF), and Mulch (MC) were selected as the mulching materials. Field experiment and laboratory experiment were performed, and soil-moisture content and temperature were continuously monitored. However, from the… More >

  • Open Access


    Development of Steel Slag-Based Solidification/Stabilization Materials for High Moisture Content Soil

    Yu Jia1, Sudong Hua1,*, Liying Qian2, Xiaojian Ren2, Jie Zuo3, Yanfang Zhang3

    Journal of Renewable Materials, Vol.10, No.3, pp. 735-749, 2022, DOI:10.32604/jrm.2022.016819

    Abstract To solve the problems of high moisture content, high viscosity, and poor engineering mechanical properties of soil, this paper using with steel slag (SS) and desulfurization ash (DS) as initial raw materials, realizing the cooperative treatment of solid waste and solidification of silt soil. The synergistic utilization of SS and DS can reduce the production cost of curing agent and promote its own consumption. According to blended cement of various SS contents and inspected compressive strength performances, the most suitable raw materials ratio was selected. The best formula for this curing agent is cement:steel slag = 3:7 with 5% DS, and its… More >

  • Open Access


    On the Stability of Carbon Shale Slope under Rainfall Infiltration

    Haifeng Huang1, Zhao Li2,*, Junhui Luo1, Zhenchao Chang1

    FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.6, pp. 1165-1178, 2021, DOI:10.32604/fdmp.2021.017256

    Abstract Carbonaceous shale is a sedimentary rock containing a large amount of dispersed carbonaceous organic material. It is easy to crack and soften when exposed to water. In the present work, the stability of such a rock and its sensitivity to the formation of infiltrations due to rainfall are analyzed numerically using the GeoStudio software. The slope stability coefficient is calculated and verified using the landslide thrust calculation method. The results show that under the action of heavy rainfall, water infiltrates into the slope layer by layer, and, accordingly, the soil volume water content is different with respect to that typical… More >

  • Open Access


    Different Decaying Wood Effects on Bacterial Diversity: Insights from Molecular Methods

    Mu Peng1, Yanli Jing1,#, Qiuyu Wang1, Shaopeng Yan1,2,*

    Phyton-International Journal of Experimental Botany, Vol.90, No.1, pp. 207-222, 2021, DOI:10.32604/phyton.2020.012424

    Abstract Decaying wood is a novel key factor required for biodiversity and function of a forest, as it provides a good account of substrate and habitats for various organisms. Herein, the bacterial diversity in decaying wood of Betula platyphylla was discussed through high throughput sequencing. Our results showed that most of the obtained sequences belonged to the phyla Firmicutes, Proteobacteria, Bacteroidetes, Actinobacteria, Acidobacteria and Verrucomicrobia. Bacterial community compositions in samples with higher moisture content were obviously different than that with lower content, which could be reflected by richness estimators, diversity indices, and cluster and heatmap analysis. All three networks were non-random… More >

  • Open Access


    Energy Release Rate Measurement of Welded Bamboo Joints

    Haiyang Zhang1,*, Qian He1, Xiaoning Lu1, A. Pizzi2,3, Changtong Mei1, Xianxu Zhan4

    Journal of Renewable Materials, Vol.6, No.5, pp. 450-456, 2018, DOI:10.7569/JRM.2017.634180

    Abstract Double cantilever beam tests were used to measure the energy release rates of linear vibrational welded moso bamboo joints. The influence of the length of the preserved cracks, the different combinations of the inner and outer bamboo surfaces and the moisture content is studied herein. The experimental compliance method, which is based on linear elastic fracture mechanics and has been shown to be an ideal method, was used to analyze data with the power equation. The results show that the preserved initial crack length does not have a significant effect on the final measured energy release rate, while the moso… More >

  • Open Access


    A Novel Interacting Multiple-Model Method and Its Application to Moisture Content Prediction of ASP Flooding

    Shurong Li1,*, Yulei Ge2, Renlin Zang2

    CMES-Computer Modeling in Engineering & Sciences, Vol.114, No.1, pp. 95-116, 2018, DOI:10.3970/cmes.2018.114.095

    Abstract In this paper, an interacting multiple-model (IMM) method based on data-driven identification model is proposed for the prediction of nonlinear dynamic systems. Firstly, two basic models are selected as combination components due to their proved effectiveness. One is Gaussian process (GP) model, which can provide the predictive variance of the predicted output and only has several optimizing parameters. The other is regularized extreme learning machine (RELM) model, which can improve the over-fitting problem resulted by empirical risk minimization principle and enhances the overall generalization performance. Then both of the models are updated continually using meaningful new data selected by data… More >

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