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Determination Of Flexural Strength Of Structural Red And White Oak And Hardwood Composite Lumber, Alan Sherrington 2022 Mississippi State University

Determination Of Flexural Strength Of Structural Red And White Oak And Hardwood Composite Lumber, Alan Sherrington

Theses and Dissertations

In this research, flexural properties of mill-run, in-grade white oak and red oak lumber from a single mill and commercially available laminated hardwood composite were evaluated. Structurally graded green (wet) freshly sawn red oak and white oak 5 by 10-cm (2 by 4-in.) nominal lumber as well as glue-laminated hardwood composite billets were tested in bending and their modulus of rupture (MOR) and modulus of elasticity (MOE) properties were developed. It is well documented that MOR and MOE are two major indicators to evaluate flexural strength of wood lumbers. From these data, summary statistics, design values, and mean separations were ...


Cross-Laminated Timber (Clt) Mechanical Properties Evaluation., Laurice Mara Spinelli Correa 2022 Mississippi State University

Cross-Laminated Timber (Clt) Mechanical Properties Evaluation., Laurice Mara Spinelli Correa

Theses and Dissertations

As the use of engineered wood products as such as cross-laminated timber (CLT) evolves in United States, it’s imperative to understand its behavior under different circumstances as well as to explore new possible streams for product’s application. In that matter, it was proposed that a research study would be developed to evaluate the performance of CLT panels focusing on strength and stiffness properties. To accomplish this goal, three main objectives were traced: 1) To complete preliminary test on traditional lumber in order to observe notched wood failure behavior focusing on strength, ductility, and failure mode; 2) To perform ...


Consumer Attitudes And Perceptions Towards The Use Of Reclaimed Wood, Mia Craig 2022 Mississippi State University

Consumer Attitudes And Perceptions Towards The Use Of Reclaimed Wood, Mia Craig

Theses and Dissertations

Reclaimed wood is material salvaged from old, abandoned buildings that offers sustainable living to communities. There have been previous studies on reclaimed wood, but a limited amount linking reclaimed wood to consumerism. In August 2021, an online survey was conducted to gauge consumers’ knowledge of the industry and attitudes on reclaimed wood practices. Consumers are U.S. citizens 18 years of age or older. Study results indicate that respondents have little knowledge regarding reclaimed wood. Of the 1,516 respondents, 44% seem knowledgeable of reclaimed wood. Most respondents are not aware that reclaimed wood is a separate industry. Respondents believe ...


Attitudes And Perceptions Of College Students And Recent College Graduates Towards Forestry And Wood Products Science Fields, Amanda Peres Vieira Bedette 2022 Mississippi State University

Attitudes And Perceptions Of College Students And Recent College Graduates Towards Forestry And Wood Products Science Fields, Amanda Peres Vieira Bedette

Theses and Dissertations

Over the past few decades, university level US Forestry and Wood Science and Technology programs have faced declining enrollment. As a result, the seeming disinterest of younger generations has impacted employment in these sectors. In an attempt to bridge the communication gap among colleges/industries, this study was created to attract the interest and maintain the enthusiasm of new generations of professionals and currently enrolled college students in the United States. In September 2021, an online survey was created and distributed to over 1500 alumni and students and received 1,495 usable surveys. Analysis performed on the resultant data included ...


Wood Properties And Utilization Of Assorted Hardwoods, Roger Dustin Snow 2022 Mississippi State University

Wood Properties And Utilization Of Assorted Hardwoods, Roger Dustin Snow

Theses and Dissertations

This work is made up of three parts. Part one looks to establish design values for two types of three ply access mats from the U.S. South and Midwest. The mats were subject to 3 point bending tests to determine strength and stiffness values. Values for MOE (Modulus of Elasticity) and MOR (Modulus of Rupture) are reported by region and mat design. Part two tested five species groups of hardwoods for wear resistance and hardness. These species groups include white oak, red oak, ash, sweetgum and hickory. These tests for wear were performed on a Navy-Type Wear Tester according ...


Enhancing The Performance Of Dowel Type Fasteners And A Case Study Of Timber Truss Failure, Lon A. Yeary 2022 Mississippi State University

Enhancing The Performance Of Dowel Type Fasteners And A Case Study Of Timber Truss Failure, Lon A. Yeary

Theses and Dissertations

This document will outline the findings of three separate and independent studies: Study 1: In or around 1972, an experimental building was constructed. One of the intents of the construction project was to demonstrate advancements in wood building construction design. It was value-engineered throughout. That is, its materials and systems were intended to function at or near design capacity. In 2019, part of the roof of the structure collapsed. This case study investigates two potential factors that led to the failure: stress concentration in excess of the 12 allowable stress for 2 × 4 web members and insufficient plywood sheathing to ...


Yield And Mechanical Properties Of Veneer From Maine-Grown Eastern Spruce And Balsam Fir, Marshal Bertrand 2022 The University of Maine

Yield And Mechanical Properties Of Veneer From Maine-Grown Eastern Spruce And Balsam Fir, Marshal Bertrand

Electronic Theses and Dissertations

This research focused on the utilization of Maine Eastern spruce and balsam fir for veneer production. Maine currently has no manufacturers of or products using structural veneer. The diversification of markets for Maine’s softwoods has been identified as a route to increase the resilience of the forest-based economy. Veneer production technology has improved significantly since the last look at Maine spruce veneer (1969), justifying the reinvestigation of Maine spruce-fir veneer. The objective of this research was to provide information on the yield of processing veneer and the quality of said veneer. A sample size of 37 Eastern spruce and ...


Evaluation Of Cross-Laminated Timber Panels Produced With Yellow-Poplar (Liriodendron Tulipifera), Rafael da Rosa Azambuja 2022 West Virginia University

Evaluation Of Cross-Laminated Timber Panels Produced With Yellow-Poplar (Liriodendron Tulipifera), Rafael Da Rosa Azambuja

Graduate Theses, Dissertations, and Problem Reports

Cross-Laminated Timber (CLT) panels are engineered wood products breaking into the building sector. Currently, the range of raw materials used in CLT is still limited to softwoods, while some hardwood species such as yellow-poplar could potentially be used to produce this wood product. Therefore, the main goal of this research was to assess the feasibility of using Appalachian Hardwoods in the production of Cross-Laminated Timber panels. Specifically, the objectives of the research were to 1) Determine the amount of yellow-poplar structural lumber that can be obtained from a representative population of low-grade, yellow-poplar lumber graded for appearance; 2) Evaluate whether ...


Understanding The Utilization Of Woody Biomass Through The Perspectives Of Southwest United States Forest Service Land Managers: A Qualitative Study, Mary-Ellen Reyna 2022 University of Montana

Understanding The Utilization Of Woody Biomass Through The Perspectives Of Southwest United States Forest Service Land Managers: A Qualitative Study, Mary-Ellen Reyna

Graduate Student Theses, Dissertations, & Professional Papers

Dry ponderosa pine/mixed conifer stands in the Southwestern United States create an overabundance of woody biomass during restoration and fuel treatments. It has been the job of land managers and resource specialists to develop management goals and practices to treat stands and lower the risk of catastrophic wildfires while managing for accumulations of woody biomass. Knowing the limitations, setbacks, and successes will help researchers, the United States Forest Service, and other land managers better improve woody biomass utilization. In conjunction with three previous ForBio Southwest studies, we present results from ten phone interviews from three Arizona and New Mexico ...


Field Durability Test Of Clt Wall Envelope Using Physical Barriers Against Termites And Structural Performance Of Nailed Hold-Down Brackets Connected To Fungus-Exposed Clt Walls, Kamal Neupane 2021 Mississippi State University

Field Durability Test Of Clt Wall Envelope Using Physical Barriers Against Termites And Structural Performance Of Nailed Hold-Down Brackets Connected To Fungus-Exposed Clt Walls, Kamal Neupane

Theses and Dissertations

The effectiveness of using commercial polyethylene flashing and stainless-steel mesh in CLT wall systems as the termite barriers were evaluated in a short-term field test. American Wood Protection Association (AWPA) E21's visual ratings ranged from 10 to 9 in the specimens showing little damage when no physical barriers were used. Termites were able to crawl beyond the physical barriers in few specimens showing the necessity of further research on height and installation method of physical barriers. On the second part, the effect of decay caused due to Postia placenta, a brown-rot fungus, on the structural performance of hold-down brackets ...


Assessing Freezing Effect On Kiwifruit Cultivars And Mapping Suitable Areas For Growing The Crop In Eastern Texas, Lais de Oliveira Machado 2021 Stephen F Austin State University

Assessing Freezing Effect On Kiwifruit Cultivars And Mapping Suitable Areas For Growing The Crop In Eastern Texas, Lais De Oliveira Machado

Electronic Theses and Dissertations

Kiwifruit is a perennial vine originating from China where it has been grown for centuries. In the United States, green kiwifruit (Actinidia deliciosa) is primarily produced commercially in California. They are fuzzy, green fleshed and well known in the marketplace. Kiwifruit plants require low to moderate soil pH, adequate winter chilling and adequate precipitation to guarantee plant development and good fructification. Actinidia chinesis or golden kiwifruit are smooth skinned, feature golden flesh and are a more recent introduction into the global market. Kiwifruit crops have attributes that favor production in east Texas, including low pest problems, current long market window ...


Optimization In The Application Of Varnishes Barrier On Cartonboard Packaging, Andre Ramalheiro de Andrade, Maria Isabel Rodrigues PhD, Eduardo Luiz Machado PhD 2021 IPT – Instituto de Pesquisas Tecnológicas do Estado de São Paulo

Optimization In The Application Of Varnishes Barrier On Cartonboard Packaging, Andre Ramalheiro De Andrade, Maria Isabel Rodrigues Phd, Eduardo Luiz Machado Phd

Journal of Applied Packaging Research

In this work adjustments in the rotogravure printing process are proposed to the varnish water vapor transmission rate (WVTR) aiming to obtain results smaller than 20g/m²/24h. One case study was used for the propositions for improvements, where focused on varnish application process in a gravure printer for an eight-printing unit cartonboard packaging, maximum printing speed of 175 m/min and a 285 g/m² weight cartonboard. The possible variables that influenced the WVTR result were selected from the technical expertise of the people involved in the project, the analysis in the printing process with the application of directed ...


Understanding The Adhesion Mechanism In Mycelium-Assisted Wood Bonding, Wenjing Sun 2021 The University of Maine

Understanding The Adhesion Mechanism In Mycelium-Assisted Wood Bonding, Wenjing Sun

Electronic Theses and Dissertations

The increasing environmental awareness has led to an increased interest in developing more sustainable materials as alternatives to petroleum-derived products. Among different nature-based products, fungal-mycelium-based bio-composites have gained considerable attention in various applications. Multiple materials with different densities and structures and potential applications can be fabricated by inoculating filamentous white-rot fungi in lignocellulosic materials and other substrates. Different from lower-density as-grown foam-like mycelium composites, higher-density mycelium-lignocellulosic panels have the potential to replace commercial particleboard and fiberboard bonded by petroleum-based resins. This kind of composite can be produced by directly adding heat and pressure to the low-density foams or by assembling ...


Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2019, Leah English, Jennie Popp, Wayne Miller 2021 University of Arkansas, Fayetteville

Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2019, Leah English, Jennie Popp, Wayne Miller

Research Reports and Research Bulletins

Agriculture and associated agricultural activities are major contributors to the Arkansas economy. Agriculture is defined as the sum of agricultural production and processing activities, unless otherwise specified, and includes crop and animal production and processing, agricultural support industries, forestry and forest products, and textile goods. Agriculture contributes to the economy through direct agricultural production and value-added processing, leading to economic activity in other parts of the economy.

This report is the fourteenth in a series that examines agriculture’s economic contribution to the Arkansas economy. The total economic contribution of agriculture (direct, indirect, and induced effects) on value added, employment ...


Degumming Of Hemp Fibers Using Combined Microwave Energy And Deep Eutectic Solvent, Bulbul Ahmed 2021 Louisiana State University and Agricultural and Mechanical College

Degumming Of Hemp Fibers Using Combined Microwave Energy And Deep Eutectic Solvent, Bulbul Ahmed

LSU Master's Theses

Hemp is considered as one of the sustainable agricultural fiber materials. Degumming or surface modification of hemp bast is needed to produce single fibers for ensuing textile and industrial applications. The traditional degumming process necessitates a high amount of alkali, which causes detrimental environmental pollution. This study offers a new method to degum hemp fibers with reduced use of harmful alkali and precious water resources. In this work, hemp bast fibers were degummed by using combined microwave energy and deep eutectic solvent (DES). The properties of hemp fibers manufactured by this method were investigated and compared with the traditional alkali ...


Influence Of Decay Fungi On Selected Anatomical Properties Of Aningeria Robusta A. Chev. Wood, Olayiwola Olaleye Ajala, Funke Grace Adebawo, Emmanuel Adekanye Adelusi, Olaoluwa Adeniyi Adegoke 2021 Federal College of Forestry, Ibadan, Nigeria

Influence Of Decay Fungi On Selected Anatomical Properties Of Aningeria Robusta A. Chev. Wood, Olayiwola Olaleye Ajala, Funke Grace Adebawo, Emmanuel Adekanye Adelusi, Olaoluwa Adeniyi Adegoke

Journal of Bioresource Management

Due to population explosion, the forest of Nigeria like most tropical forest is over exploited for choice traditional species. Therefore, need to investigate species that can substitute the species arise. Five trees of Aningeria robusta were harvested from Cocoa Research Institute of Nigeria. Bolts of 50cm length were obtained at the base, middle and the top; radial strips also obtained for innerwood, middlewood and outerwood. Ten test specimens of dimension 12mm x 15mm x 25mm were obtained per zone. N-hexane heartwood extracts of a 30 year old Gliricidia sepium diluted with kerosene using volume by volume method into 0%, 25 ...


Investigation Of Interactions Between 1,3 Dialkyl Imidazolium Ionic Liquids And Lignocellulosic Polymers, Aparna Annamraju 2021 University of Tennessee

Investigation Of Interactions Between 1,3 Dialkyl Imidazolium Ionic Liquids And Lignocellulosic Polymers, Aparna Annamraju

Doctoral Dissertations

Lignocellulosic biomass is a potential energy source for fuels, chemicals and materials production in a sustainable manner. A network of covalent and non-covalent bonds between the three main polymers of biomass, i.e., cellulose, hemicellulose and lignin, results in a compact structure that is resistant to chemical and biological attacks and therefore challenging for the efficient utilization of lignocellulosic biomass. Ionic liquids (ILs) have been reported to disrupt the bonds between these polymers and dissolve biomass at temperatures below 100 ˚C. Research through the years has shown that biomass pretreatment with IL brings out the selective dissolution of biomass polymers ...


The Dandy Scroll, Spring 2021, University of Maine Pulp and Paper Foundation 2021 The University of Maine

The Dandy Scroll, Spring 2021, University Of Maine Pulp And Paper Foundation

General University of Maine Publications

The Spring 2021 issue of The Dandy Scroll newsletter produced by the University of Maine Pulp and Paper Foundation.


Annual Report - 2020, John Erixson 2021 Nebraska Forest Service

Annual Report - 2020, John Erixson

Publications, etc. -- Nebraska Forest Service

No abstract provided.


The Politics Of Biomass Energy In California: How External Benefits Are Used To Support An Economically Marginal Sector, Dana L. Dysthe 2021 Humboldt State University

The Politics Of Biomass Energy In California: How External Benefits Are Used To Support An Economically Marginal Sector, Dana L. Dysthe

Cal Poly Humboldt theses and projects

Since the 1990s, there has been a decline in biomass energy generation in California. In order to promote state governmental policies aiming to increase biomass energy generation in California, the sector has been linked to a series of external benefits that biomass energy purportedly brings. Through document analysis, semi-structured interviews, and participant observation, five distinct external benefits were identified that have been used to promote the biomass energy sector. These external benefits are: renewable energy generation, air quality improvements, promotion of forest restoration and fuel removal projects, disposal of wood waste from agricultural and forestry sectors, and rural economic development ...


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