Mahdi Mubarok^1,2, Christine Gérardin-Charbonnier^1,*, Elham Azadeh¹, Firmin Obounou Akong¹, Stéphane Dumarçay¹, Antonio Pizzi¹, Philippe Gérardin^1,*

Journal of Renewable Materials, Vol.11, No.2, pp. 505-521, 2023, DOI:10.32604/jrm.2022.024872

Abstract Furfurylation is a well-known wood modification technology. This paper studied the effect of tannin addition on the wood furfurylation. Three kinds of dicarboxylic acids, adipic acid, succinic acid, and tartaric acid, as well as glyoxal as a comparing agent, were used to catalyse the polymerisation of furanic or tannin-furanic solutions during wood modification. Impregnation of furanic or tannin-furanic solution at a certain concentration into the wood followed with curing at 103°C for a specific duration was performed for the wood modification. Different properties of the modified woods like dimensional stability, resistance of treatment to leaching, mechanical properties, decay durability against… More >

Mingkai Sun^1,*, Yanan Wang², Pingwei Jiang¹, Zerong Song³, Zhan Gao⁴, Jiaming Xu⁵

Journal of Renewable Materials, Vol.11, No.2, pp. 643-668, 2023, DOI:10.32604/jrm.2022.022168

Abstract A composite rubber concrete (CRC) was designed by combining waste tire rubber particles with particle sizes of 3~5 mm, 1~3 mm and 20 mesh. Taking the rubber content of different particle sizes as the influencing factors, the range and variance analysis of the mechanical and impermeability properties of CRC was carried out by orthogonal test. Through analysis, it is concluded that the optimal proportion of 3~5 mm, 1~3 mm, and 20 mesh particle size composite rubber is 1:2.5:5. 5 kinds of CRC and 3 kinds of ordinary single-mixed rubber concrete (RC) with a total content of 10%~20% were designed under… More >

T. Ganier, J. Hu, A. Pizzi^*

Journal of Renewable Materials, Vol.1, No.1, pp. 79-82, 2013, DOI:10.7569/JRM.2012.634101

Abstract Linear vibration welding of extractive rich Paduk wood from central Africa containing a high proportion of a native mixture of water-insoluble extractives, or of low water solubility, has been shown to yield joints of much upgraded water resistance. This has been shown to be due to the protecting infl uence the extractives from the wood itself has on the welded interphase, due to their inherent water repellence. Joints of unusually high percentage wood failure but modest strength were obtained; Paduk wood brittleness apparently yielding weld line strengths always higher than that of the surrounding wood itself. This indicated that Paduk… More >

M. Tazi¹, F. Erchiqui^1,*, F.Godard¹, H. Kaddami²

Journal of Renewable Materials, Vol.2, No.4, pp. 258-263, 2014, DOI:10.7569/JRM.2014.634120

Abstract This article evaluates the mechanical properties and biodegradability of wood-plastic composite materials made from sawdust and thermoplastic polymer (HDPE). For the preparation of the composites, sawdust in different proportions with Maleic Anhydride grafted Polyethylene (MAPE) as the coupling agent was used. The mechanical properties and biodegradability of the biocomposites were successively characterized. The results indicate that adding sawdust particles to a polymer matrix improves the mechanical strength and stiffness of composites. The tensile strength of a composite with 3% coupling agent was improved by 13%, 34% and 54% respectively when 20%, 30% and 40% wood fi llers were added to… More >

Xin Cai^1,2, Fan Li¹, Xingwen Guo^2,*, Ren Li³, Yanan Zhang¹, Qinghui Liu², Minmin Jiang⁴

Journal of Renewable Materials, Vol.11, No.1, pp. 103-130, 2023, DOI:10.32604/jrm.2022.022684

Abstract With the great impetus of energy conservation and emission reduction policies in various countries, the proposal of concepts such as “Sponge City” and “Eco-City”, and the emphasis on restoration and governance of ecological environment day by day, portland cement porous concrete (PCPC), as a novel building material, has attracted more and more attention from scientific researchers and engineers. PCPC possesses the peculiar pore structure, which owns numerous functions like river embankment protection, vegetation greening as well as air-cleaning, and has been of wide application in different engineering fields. This paper reviews the salient properties of PCPC, detailedly expounds the research… More > Graphic Abstract

Hualei Bai^1,2, Ying Li^1,2,*, Dahu Dai^1,2

Journal of Renewable Materials, Vol.10, No.11, pp. 3059-3078, 2022, DOI:10.32604/jrm.2022.020148

Abstract In order to make full use of waste recycled fine powder (RFP) in concrete and achieve the goal of carbon neutrality in the concrete industry, the durability of sulfate resistance is an important aspect of evaluating the performance of recycled powder concrete (RPC). Therefore, the durability of RPC under partial sulfate immersion was studied to provide theoretical guidance for understanding the erosion mechanism of RPC. The compressive strength, mass loss, and microstructure change patterns of RPC under partial immersion of 5% Na₂SO₄ and MgSO₄ solutions were analyzed by cubic compressive strength, mass loss rate, SEM-EDS, and XRD. The results showed… More >

Jianqiao Yu^1,*, Hongxia Qiao^1,2, Theogene Hakuzweyezu¹, Feifei Zhu¹

Journal of Renewable Materials, Vol.10, No.11, pp. 2973-2987, 2022, DOI:10.32604/jrm.2022.019620

Abstract This study was designed to solve the problem of magnesium hazards due to potash extraction in the salt lake region. Using basalt fiber (BF) as the reinforcement material and magnesium oxychloride cement (MOC) as the gelling material, a BF/MOC composite material was prepared. Firstly, the effect of BF addition content on the basic mechanical properties of the composites was investigated. Then, through the salt spray corrosion test, the durability damage deterioration evaluation analysis was carried out from both macroscopic and microscopic aspects using mass change, relative dynamic modulus of elasticity (RDME) change, SEM analysis and FT-IR analysis. Finally, a GM(1,… More >

Afonso R. G. de Azevedo^1,*, Marcelo Nascimento², Dirlane do Carmo³, Markssuel T. Marvila⁴, Gustavo de C. Xavier¹, Sergio Neves Monteiro⁴

Journal of Renewable Materials, Vol.10, No.9, pp. 2409-2429, 2022, DOI:10.32604/jrm.2022.020503

Abstract The use of natural lignocellulosic fibers (NLFs) as a reinforcement mechanism for cementitious composites, such as mortar, has been investigated in the last decades. However, their application has often been restricted to technological evaluation research. A NLF with great potential the curaua, which after treatment with NaOH solution, proved to be technologically feasible for mortars reinforcement based on cement and lime. The objective of this research was the comparative evaluation between a traditional mortar, based on cement and lime, with 1:1:6:0.8 ratio of cement: lime: sand: water, and a modified mortar with addition of 2 wt.% treated curaua fiber in… More >

Xupeng Chen^1,*, Zhuowen Sun², Jianyong Pang¹

Journal of Renewable Materials, Vol.10, No.9, pp. 2489-2508, 2022, DOI: 10.32604/jrm.2022.019404

Abstract Mineral admixture concrete is a renewable material. It requires less cement than ordinary concrete and is thus beneficial for economical use of resources and environmental protection. To examine the impact of chloride salt on the durability of mineral admixture concrete under various conditions, in this study, test blocks are divided into two major groups: in one group, the test block is eroded by chloride salt on the interior and by sulphate/ magnesium salts on the exterior, and in the second group, the test block is eroded by external chloride/sulphate/ magnesium salts. Clean water is considered the control group. Dry-wet alternation… More > Graphic Abstract

Mostafa Amiri¹, Farzad Hatami^2,*, Emadaldin Mohammadi Golafshani³

Journal of Renewable Materials, Vol.10, No.8, pp. 2155-2177, 2022, DOI: 10.32604/jrm.2022.019726

Abstract In this experimental study, the impact of Portland cement replacement by ground granulated blast furnace slag (GGBFS) and micronized rubber powder (MRP) on the compressive, flexural, tensile strengths, and rapid chloride migration test (RCMT) of concrete were assessed. In this study, samples with different binder content and water to binder ratios, including the MRP with the substitution levels of 0%, 2.5% and 5%, and the GGBFS with the substitution ratios of 0%, 20% and 40% by weight of Portland cement were made. According to the results, in the samples containing slag and rubber powder in the early ages, on average,… More > Graphic Abstract