Home / Advanced Search

  • Title/Keywords

  • Author/Affliations

  • Journal

  • Article Type

  • Start Year

  • End Year

Update SearchingClear
  • Articles
  • Online
Search Results (13)
  • Open Access

    ARTICLE

    Research on the identification of modulus parameters for rigid pavement panel foundations

    Hui-min Cao1,2, Han-jun Zhao2,3, Xin-e Yan1,4

    Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.40, No.2, pp. 1-6, 2024, DOI:10.23967/j.rimni.2024.04.002 - 18 April 2024

    Abstract Based on the Pasternak two-parameter foundation model, this study establishes a dynamic model for analyzing the deflection of slabs under moving loads. The variational method and reciprocal equal work theorem are employed to obtain the deflection solution, while the Matlab program is utilized with practical examples to calculate the foundation response modulus considering transfer shear force, bending moment, and their combined effects. By fitting measured dynamic deflections with theoretical predictions using the least square method, the response modulus K of the foundation is determined, demonstrating that our proposed model effectively captures the realistic behavior of More >

  • Open Access

    ARTICLE

    Preliminary Study on the Treatment Efficiency of Pasteurized Lime Thermal Alkaline Hydrolysis for Excess Activated Sludge and Reduction of Tetracycline Resistance Genes

    Maoxia Chen1,2,*, Qixuan Zhou1, Jiayue Zhang1, Jiaoyang Li1, Wei Zhang1, Huan Liu1

    Journal of Renewable Materials, Vol.11, No.10, pp. 3711-3723, 2023, DOI:10.32604/jrm.2023.027826 - 10 August 2023

    Abstract Thermal alkaline hydrolysis is a common pretreatment method for the utilization of excess activated sludge (EAS). Owing to strict environment laws and need for better energy utilization, new methods were developed in this study to improve the efficiency of pretreatment method. Direct thermal hydrolysis (TH), pasteurized thermal hydrolysis (PTH), and alkaline pasteurized thermal hydrolysis (PTH + CaO and PTH + NaOH) methods were used to treat EAS. Each method was compared and analyzed in terms of dissolution in ammonium nitrogen (NH4 + -N) and soluble COD (SCOD) in EAS. Furthermore, the removal of tetracycline resistance genes… More >

  • Open Access

    ARTICLE

    Early-Age Properties Development of Recycled Glass Powder Blended Cement Paste: Strengths, Shrinkage, Nanoscale Characteristics, and Environmental Analysis

    Zhihai He1,2, Menglu Shen1, Jinyan Shi3,*, Jingyu Chang1, Víctor Revilla-Cuesta4, Osman Gencel5

    Journal of Renewable Materials, Vol.11, No.4, pp. 1835-1852, 2023, DOI:10.32604/jrm.2023.024887 - 01 December 2022

    Abstract Recycling solid waste in cement-based materials cannot only ease its load on the natural environment but also reduce the carbon emissions of building materials. This study aims to investigate the effect of recycled glass powder (RGP) on the early-age mechanical properties and autogenous shrinkage of cement pastes, where cement is replaced by 10%, 20% and 30% of RGP. In addition, the microstructure and nano-mechanical properties of cement paste with different RGP content and water to binder (W/B) ratio were also evaluated using SEM, MIP and nanoindentation techniques. The results indicate that the early-age autogenous shrinkage… More > Graphic Abstract

    Early-Age Properties Development of Recycled Glass Powder Blended Cement Paste: Strengths, Shrinkage, Nanoscale Characteristics, and Environmental Analysis

  • Open Access

    ARTICLE

    Bending and Free Vibration Analysis of Porous-Functionally-Graded (PFG) Beams Resting on Elastic Foundations

    Lazreg Hadji1,2,*, Fabrice Bernard3, Nafissa Zouatnia4

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 1043-1054, 2023, DOI:10.32604/fdmp.2022.022327 - 02 November 2022

    Abstract The bending and free vibration of porous functionally graded (PFG) beams resting on elastic foundations are analyzed. The material features of the PFG beam are assumed to vary continuously through the thickness according to the volume fraction of components. The foundation medium is also considered to be linear, homogeneous, and isotropic, and modeled using the Winkler-Pasternak law. The hyperbolic shear deformation theory is applied for the kinematic relations, and the equations of motion are obtained using the Hamilton’s principle. An analytical solution is presented accordingly, assuming that the PFG beam is simply supported. Comparisons with More > Graphic Abstract

    Bending and Free Vibration Analysis of Porous-Functionally-Graded (PFG) Beams Resting on Elastic Foundations

  • Open Access

    ARTICLE

    Effect of Introducing Conductive Organic Carrier on Properties of Low-Temperature Conductive Silver Paste

    Peng Chen*, Wentao Shi, Jian Wan, Lu Huang

    Journal of Renewable Materials, Vol.11, No.2, pp. 1017-1029, 2023, DOI:10.32604/jrm.2023.023699 - 22 September 2022

    Abstract The poly(epoxy-N-methylaniline) conductive organic carrier was used as the bonding phase of the low-temperature conductive silver paste. Then, this was mixed with different proportions of silver powder to prepare the lowtemperature conductive silver paste. Afterwards, the effect of the conductive organic carrier on the properties of the low-temperature conductive silver paste was determined by IR, DMA and SEM. The results revealed that the prepared conductive paste has good conductivity, film-forming performance, printing performance, low-temperature curing performance, and anti-aging performance. When the mass percentage of the bonding phase/conductive phase was 40/60, the lowest volume resistivity of More > Graphic Abstract

    Effect of Introducing Conductive Organic Carrier on Properties of Low-Temperature Conductive Silver Paste

  • Open Access

    ARTICLE

    An Experimental Investigation on Workability and Bleeding Behaviors of Cement Pastes Doped with Nano Titanium Oxide (n-TiO2) Nanoparticles and Fly Ash

    Fatih Çelik1,*, Oğuzhan Yıldız2, Andaç Batur Çolak3, Samet Mufit Bozkır1

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 135-158, 2023, DOI:10.32604/fdmp.2022.021014 - 02 August 2022

    Abstract In this study, the workability of cement-based grouts containing n-TiO2 nanoparticles and fly ash has been investigated experimentally. Several characteristic quantities (including, but not limited to, the marsh cone flow time, the mini slump spreading diameter and the plate cohesion meter value) have been measured for different percentages of these additives. The use of fly ash as a mineral additive has been found to result in improvements in terms of workability behavior as expected. Moreover, if nano titanium oxide is also used, an improvement can be obtained regarding the bleeding values for the cement-based grout mixes. More >

  • Open Access

    ARTICLE

    Utilization of Low-Alkalinity Cementitious Materials in Cemented Paste Backfill of Gold Mine Tailings

    Jiamao Li1,2,*, Chuimin Zhang1, Lin Li1, Chuangang Fan1,*, Zhaofang He3, Yuandi Qian3

    Journal of Renewable Materials, Vol.10, No.12, pp. 3439-3458, 2022, DOI:10.32604/jrm.2022.021214 - 14 July 2022

    Abstract The purpose of this paper was to explore the possibility of using low-alkalinity cementitious materials as binders, in which ground blast furnace slag and fly ash acted as a partial replacement of ordinary Portland cement, and CaSO4, Na2SO4, and CaO were used as a sulfate activator and alkali-activated additives, to solidify gold mine tailings for preparation of a green, inexpensive cemented paste backfill (CPB). For this target, the effects of cement/ tailings ratio, superplasticizer dosage, solid content, tailings fineness on the mechanical properties of the CPB were investigated. Additionally, the hydration mechanism of the CPB was… More >

  • Open Access

    ARTICLE

    Research and Application Status and Development Trend of Alkali-Activated Binder Powder for Mine Backfill

    Qian Zhou1, Yueyue Zhang1, Juanhong Liu1,2,3,*, Aixiang Wu1,2, Hongjiang Wang1,2

    Journal of Renewable Materials, Vol.10, No.12, pp. 3185-3199, 2022, DOI:10.32604/jrm.2022.020316 - 14 July 2022

    Abstract To improve the economic and social benefits of mining and backfill, it is necessary to find the backfill materials suitable for mineral mining, improve the various properties of the filling materials, and develop low cost, high performance new filling materials. Portland cement is neither environmentally friendly nor economical. Currently, we have begun to study and apply some industrial waste, such as slag, fly ash, and other solid wastes, with certain activities as the primary component of cementing material that will not only meet the technical requirements of filling, but also comprehensively utilize industrial waste and… More >

  • Open Access

    ARTICLE

    A Modeling Method for Predicting the Strength of Cemented Paste Backfill Based on a Combination of Aggregate Gradation Optimization and LSTM

    Bo Zhang1,2, Keqing Li1,2, Siqi Zhang1,2, Yafei Hu1,2, Bin Han1,2,*

    Journal of Renewable Materials, Vol.10, No.12, pp. 3539-3558, 2022, DOI:10.32604/jrm.2022.021845 - 14 July 2022

    Abstract Cemented paste backfill (CPB) is a sustainable mining technology that is widely used in mines and helps to improve the mine environment. To investigate the relationship between aggregate grading and different affecting factors and the uniaxial compressive strength (UCS) of the cemented paste backfill (CPB), Talbol gradation theory and neural networks is used to evaluate aggregate gradation to determine the optimum aggregate ratio. The mixed aggregate ratio with the least amount of cement (waste stone content river sand content = 7:3) is obtained by using Talbol grading theory and pile compactness function and combined with… More > Graphic Abstract

    A Modeling Method for Predicting the Strength of Cemented Paste Backfill Based on a Combination of Aggregate Gradation Optimization and LSTM

  • Open Access

    ARTICLE

    Ginkgo paste improves tinea corporis in a guinea pig model

    LIHUA CAO1, MINGSAN MIAO1,*, YAN ZHENG2, HUIYAUN HUANG2, RUI ZHANG2, DANDAN LIU2

    BIOCELL, Vol.44, No.4, pp. 649-653, 2020, DOI:10.32604/biocell.2020.05093 - 24 December 2020

    Abstract To investigate the effects of Ginkgo paste for external use on tinea corporis in a guinea pig model. The guinea pig tinea corporis model were induced by infection with Trichophyton mentagrophytes strains. And then, high and low doses of Ginkgo water-paste and alcohol-paste were administrated to the animals. The symptom, tinea corporis skin lesions and histopathological aspects of guinea pig were analyzed. High and low doses of Ginkgo alcohol-paste and Ginkgo water-paste could significantly reduced the tinea corporis symptom (P < 0.01), increased negative rate of strain culture (P < 0.01), and improved pathological changes of tinea More >

Displaying 1-10 on page 1 of 13. Per Page