812 Tomografering as a method for the design of building components

Published: 24 August 2012

The aim is to develop methods to detect, measure and quantify moisture and deformationsförändringar and cracking the xyz in the construction products under the influence of varying climate with computed tomography and imaging. Long term, these methods could be used for development of building products and real-counted to known test methods such as delamination testing.

Area: Durability of wood
Budget: 2 150 000 SEK
Timetable: January 2011-December 2013
Project Manager: Karin Sandberg, SP Wood

Background

Outdoor Wood structures are usually composed of several materials. Joints in combination with wood may be nails, screws, plates or glue. Damage usually occurs at the end grain, joints and at the interface between two materials. The joining of wood and other materials as above mentioned is an area that has not been thoroughly studied in order to improve the design from the point of resistance. There are a number of issues where the adaptation of methods for new uses can lead to better products of wood.


With tomography and imaging, it is possible that non-destructive and in three dimensions studying outdoor constructions of wood during water uptake (climate change) and thus water allocation, movement (shrinkage / swelling), delamination, etc. The advantages of using computed tomography as an investigative method instead of moistening and cutting apart is that it is posible to study the processes of movement due to moisture and temperature changes for a long time. By measuring we get data that makes it possible to quantify the results, and thus we can also influence decision-making, provide advice and recommendations and suggestions for better solutions for wood structures, or delete inappropriate solutions

Vision, purpose, goals

The vision is to create guidelines and recommendations that improve the design and execution of
wooden structures, thereby achieving greater durability and performance for outdoor wood products.


The aim is to develop methods to detect, measure and quantify moisture and deformationchanges and cracking xyz in the construction products under the influence of varying climate with computed tomography and imaging. Long term, these methods could be used for development of building products and be realated to known test methods such as delamination testing. By measuring we get data that makes it possible to quantify the results and thereby affect decision-making, provide advice and recommendations and suggestions for better solutions for wood structures, or remove inappropriate solutions.


The goal is to after three years have developed at least two methods to measure the change in wood under external influences that give accurate results for verification by other methods.


Another objective is to test some of the measurement methods in practice on some prototypes "case studies" as well and work out instructions with advice and recommendations on the development of construction products.

Previous projects in the field

Final Report

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