Jili Qu^*, Hao Zhu^*

Journal of Renewable Materials, Vol.9, No.4, pp. 767-787, 2021, DOI:10.32604/jrm.2021.013816

Abstract Palm fiber is one of the favorable materials used in stabilization of soft soil in geotechnical engineering projects in recent years due to its nature of sustainability, no harm to the environment, biodegradability, availability and cost-effectiveness in the context of widespread appeal from the world for returning to nature and protecting the earth our homestead. This paper is aimed at exploring the mechanical performance of Shanghai clayey soil reinforced with palm fiber. The unconfined compressive tests are carried out on samples treated with palm fibers of different lengths and contents, and the unconfined compressive strength (UCS), ductility rate (DR), secant… More >

Ruixue Wu¹, Tiejun Zhao¹, Peng Zhang¹, Dingyi Yang², Miao Liu², Zhiming Ma^2,*

Journal of Renewable Materials, Vol.9, No.4, pp. 743-765, 2021, DOI:10.32604/jrm.2021.013669

Abstract

This work investigates the feasibility of utilizing reactive recycled powder (RP) from construction and demolition (C&D) waste as supplementary cementitious material (SCM) to achieve a ductile strain hardening cementitious composites (SHCC). The recycled mortar powder (RMP) from mortar waste, recycled concrete powder (RCP) from concrete waste and recycled brick powder (RBP) from clay brick waste were first prepared, and the micro-properties and tensile behavior of SHCC containing various types and replacement ratios of RPs were determined. The incorporated RP promotes pozzolanic and filler effects, while the hydration products in cementitious materials decrease with RP incorporation; therefore, the incorporated RP decreases… More >

Fang Liu¹, Baomin Wang^2,*, Mengsai Wang², Xiaosa Yuan¹

Journal of Renewable Materials, Vol.9, No.4, pp. 723-742, 2021, DOI:10.32604/jrm.2021.013664

Abstract

In this paper, mercury intrusion porosimetry (MIP) is used to test the pore structure of non-dispersible underwater concrete so as to study the influence of pouring and curing environment, age and slag powder on the pore characteristics of concrete, analyze the pore characteristics, porosity and pore distribution of concrete in different hydration stages, and reveal the relationship between pore structure and permeability of concrete. The results show that the pore-size distribution of concrete in fresh water condition is better than that in sulfate environment and mixed salt environment, and therefore, sulfate as well as mixed salt are not conducive to… More >

Sami Allagui^1,2,*, Abderrahim El Mahi¹, Jean-Luc Rebiere¹, Moez Beyaoui², Anas Bouguecha², Mohamed Haddar²

Journal of Renewable Materials, Vol.9, No.4, pp. 695-721, 2021, DOI:10.32604/jrm.2021.013586

Abstract This manuscript deals with the effects of recycling on the static and dynamic properties of flax fibers reinforced thermoplastic composites. The corresponding thermoplastic used in this work is Elium resin. It’s the first liquid thermoplastic resin that allows the production of recycled composite parts with promising mechanical behavior. It appeared on the resin market in 2014. But until now, no studies were available concerning how it can be recycled and reused. For this study, a thermocompression recycling process was investigated and applied to Elium resin. Flax fiber-reinforced Elium composites were produced using a resin infusion process and were subjected to… More >

Penghui Wang, Hongtao Kao^*

Journal of Renewable Materials, Vol.9, No.4, pp. 671-693, 2021, DOI:10.32604/jrm.2021.013377

Abstract The research method of computational fluid dynamics (CFD) is used to study the technology of burning sludge in cement precalciner. The simulation results show that the flow field in the TTF precalciner is stable, the spray effect is good, and no raw meal collapse occurs. The special structure of the TTF (Trinal-sprayed) precalciner allows the pulverized coal and sludge to fully exchange heat with the flue gas and burn. When there is no sludge burning in the furnace, the decomposition rate can reach 92.1%, and the maximum temperature of the precalciner can reach 1600 K. When the moisture content of… More >

Yujie Huang¹, Hao Zhu², Dauletbek Assima⁴, Zheng Wang^1,*, Minmin Li³, Xinyue Zhao¹

Journal of Renewable Materials, Vol.9, No.4, pp. 829-840, 2021, DOI:10.32604/jrm.2021.014610

Abstract To improve the impact sound insulation performance of building floors and meet the objective requirements for living comfort of residents, in this article, three kinds of elastic cushion materials, Portuguese cork board, BGL insulation sound insulation foam board, and EPP polypropylene plastic foam board, are applied to the sound insulation of a light frame wood floor structure of the same bedroom and compared to the ordinary floor. This study uses the transfer function method and transient excitation method to measure the sound insulation, damping ratio, and elastic modulus of materials, as well as the sound insulation of the floor under… More >

H. N. Salwa¹, S. M. Sapuan^1,2,*, M. T. Mastura³, M. Y. M. Zuhri²

Journal of Renewable Materials, Vol.9, No.4, pp. 803-827, 2021, DOI:10.32604/jrm.2021.013977

Abstract Biopolymer composite has gained huge attention for its beneficial properties such as biodegradable and less impact to the environment. This consequently would diminish the dependency on the petroleum-based polymer. Abundance of studies have been done on the development and characterization of biopolymer composite materials for food packaging application, but work on the conceptual design of biopolymer composite packaging product is hardly found. Using the Kano Model, Quality Function Deployment for Environment (QFDE), morphological map, and Analytic Hierarchy Method (AHP) framework combination, this paper presents the conceptual design of a natural fibre reinforced biopolymer composites take-out food container. To understand customer… More >

Yujie Bai^1,*, Youquan Huang³, Guangsheng Cao¹, Xiaohan Nan¹, Qingchao Cheng¹, Lei Wang², Tong Du⁴

Journal of Renewable Materials, Vol.9, No.4, pp. 651-669, 2021, DOI:10.32604/jrm.2021.014479

Abstract This study analyzed the partial effect of carbon dioxide hydrate in reaction kettle experiments. The particle and bubble characteristics of the crystal nucleus during carbon dioxide hydrate decomposition were observed under the microscope. The results showed that in the temperature range of 0.5°C–3.5°C, the pressure range of 3 MPa– 5.5 MPa, phase characteristics in the reaction kettle changed in a complex fashion during carbon dioxide hydrate formation. During hydrate decomposition, numerous carbon dioxide bubbles were produced, mainly by precipitation at high temperatures or in the hydrate cage structure. The hydrate crystal nucleus initially exhibited fluidity in the reaction. However, as… More >

Huazhe Jiao^1,2, Yachuang Wu¹, Wei Wang^2,*, Xinming Chen¹, Yunfei Wang¹, Juanhong Liu³, Wentao Feng⁴

Journal of Renewable Materials, Vol.9, No.4, pp. 637-650, 2021, DOI:10.32604/jrm.2021.014310

Abstract Higher concentration is beneficial for the Paste and Thickened Tailings (PTT) operation in metal mine. Partial paste thickeners are produced lower density underflow. Flocculated tailings are intended to form a water entrapped network structure in thickener, which is detrimental to underflow concentration. In this study, the continuous thickening experiment was carried out for ultra-fine tungsten tailings to study the influence of rake shearing on underflow. The micro pores structure and seepage flow in tailings bed before and after shearing are studied by CT and simulation approach to reveal the shearing enhancement mechanism of thickening process. The results shown that, the… More >

Neha Srivastava^1,*, Akshay Shrivastav², Rajeev Singh³, Mohammed Abohashrh⁴, K. R. Srivastava¹, Safia Irfan⁵, Manish Srivastava¹, P. K. Mishra¹, Vijai Kumar Gupta⁶, Vijay Kumar Thakur^6,*

Journal of Renewable Materials, Vol.9, No.4, pp. 615-636, 2021, DOI:10.32604/jrm.2021.014374

Abstract Increased environmental pollution due to the organic wastes over the world is one of the most burning issues. These organic wastes lie under the category of biodegradable waste and can be effectively degraded from their complex compound into simple one by the action of microbes or other living organisms. Moreover, lignocellulosic biomass is a major part of the biodegradable waste and belongs to the group of renewable energy source, which can be very effective for bioenergy production. Biomasses are made up of different compounds such as cellulose, hemicelluloses, lignin and protein. Apart from these components, based on the structural analysis… More >