Experimental grading of locally grown timber to be used as structural material

Concu, Giovanna; Nicolo, Barbara De; Valdés, Mónica; Fragiacomo, Massimo; Menis, Agnese; Trulli, Nicoletta

doi:10.1201/b13165-39

Cited by 5 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of the base material. Furthermore, as reported by Concu et al [42], preliminary results on CLT panels made of Sardinian Maritime Pine wood confirmed that medium quality panels can be produced and used as horizontal and vertical elements in civil engineering structures.…”

Section: Discussionsupporting

confidence: 74%

“…For this reason, modern grading machines are based on non-destructive testing, contact-free measures or on their combination. Several authors demonstrated good correlations among non-destructive parameters and mechanical and stiffness properties of timber (ultrasounds measures or vibration methods) [39] or density (X-ray measures) [40][41][42]. Some models of grading machines incorporated a contact-free in-line moisture metre, so stiffness and density measures are automatically adjusted to the reference conditions (12%) [39].…”

Section: Machine Gradingmentioning

confidence: 99%

See 1 more Smart Citation

Grading of Low-Quality Wood for Use in Structural Elements

Trulli¹,

Valdés²,

Nicolo³

et al. 2017

Wood in Civil Engineering

View full text Add to dashboard Cite

Timber is a sustainable resource, environmentally friendly and aesthetically pleasing. Using locally grown timber as building material leads to economic, social and environmental benefits. Being an organic material, timber is not homogeneous; hence, it is crucial to predict the base material quality. International codes require the use of wood previously graded according to the current regulations in order to verify its reliability when used as structural material. An exhaustive analysis of the state of art of different methodologies and code requirements for structural timber grading is presented herein. Structural timber grading methods and their applicability to low-strength timber is analysed and discussed with reference to Maritime Pine locally grown in Sardinia (Italy). Several physical and morphological parameters such as density, the presence of knots, clusters of knots, grain deviation, warping, annual ring width and moisture content had to be measured. Moreover, mechanical parameters (tensile strength and modulus of elasticity in tension) were measured and analysed in order to identify the strength class of Sardinian Maritime Pine. The operational issues related to the application of the different methodologies and code requirements for structural grading of low-quality wood are also discussed and analysed.

show abstract

Section: Discussionsupporting

confidence: 74%

Section: Machine Gradingmentioning

confidence: 99%

Grading of Low-Quality Wood for Use in Structural Elements

Trulli¹,

Valdés²,

Nicolo³

et al. 2017

Wood in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…With this technique, high quality structural members can be produced using normal/low quality timber such as Sardinian maritime pine, which is generally low quality due to the presence of defects (knots, clusters knot, resin pockets, deviation of the grain etc.) (Concu, 2012 and2013).…”

Section: Introductionmentioning

confidence: 99%

Sonic testing on cross laminated timber panels

Concu¹,

Nicolo²,

Riu³

et al. 2016

Insights and Innovations in Structural Engineering, Mechanics and Computation

Self Cite

View full text Add to dashboard Cite

Cross Laminated Timber (CLT) panels are used as building construction materials due to their excellent properties. In particular, with this construction technique it is possible to produce high quality structural members by assembling normal/low quality planks. Timber boards should be graded according to the current regulations before their use as structural components. Among grading methodologies, non-destructive Sonic Testing can be applied. Sonic Testing is a non destructive technique widely used for building material quality control. In this paper, the reliability of Sonic Testing in giving information on some mechanical characteristics of Cross Laminated Timber panels is discussed also in relation to wood type, layers number and layers configuration of the panels. For this purpose, both Sonic Testing and destructive bending tests have been carried out on several CLT panels manufactured by using boards of Spruce and Sardinian Maritime Pine. Regression analysis between sonic and mechanical parameters (static modulus of elasticity and bending strength) has been performed and is critically discussed in the paper

show abstract

“…In this framework, a research project has been started in cooperation with the Forestry Association of Sardinia with the aim of evaluating the possibility of using locally grown timber as structural material [4].…”

Section: Introductionmentioning

confidence: 99%

Strength Class Prediction of Sardinia Grown Timber by Means of Non Destructive Parameters

Concu

Nicolo

Trulli

et al. 2013

AMR

View full text Add to dashboard Cite

In Italy timber and wood products are becoming increasingly used for building constructions due to their excellent physics and mechanical properties. International Codes require the use of wood previously graded according to the current regulation. This paper reports the preliminary results of an experimental campaign aimed at verifying the reliability of the use of Sardinian timber as structural material. For this purpose Maritime Pine boards from two different Sardinian areas have been analyzed and visual strength graded. Physical and morphological properties (density, knots, clusters knot, resin pockets, deviation of the grain, annual ring width position of board respect to the pith, humidity, etc.) along with mechanical and non destructive properties (elastic modulus, tensile strength, ultrasonic pulse velocity) have been checked. Timber properties have been statistically evaluated in order to identify the performance of the base material. Regression analyses have been carried out by studying the correlation between non destructive parameters and mechanical properties in order to define a criterion for predicting the strength class of the base material.

show abstract

Experimental grading of locally grown timber to be used as structural material

Cited by 5 publications

References 0 publications

Grading of Low-Quality Wood for Use in Structural Elements

Grading of Low-Quality Wood for Use in Structural Elements

Sonic testing on cross laminated timber panels

Strength Class Prediction of Sardinia Grown Timber by Means of Non Destructive Parameters

Contact Info

Product

Resources

About