Engineered Composite Building Products Dilpreet Bajwa James Helphrey 2015-16

What are Engineered Composite Products ? Engineered composite products can be defined as products consisting of a combination of a smaller components to make a structural product designed using engineering methods. An alternative to traditional sawn lumber.

Why use Engineered Composite Building Products ? Variety of Wood Sources Performance Standard Uniform Properties Efficient use of Resources Economics

Composite Materials Fiberboard (low, medium and high density) Hardboard/Particleboard Oriented strandboard (OSB) Laminate strand lumber Glue laminate beams FRP-Reinforced Glulam Beams Natural fiber polymer composites

Type of Engineered Materials Veneer Based Plywood Laminated Veneer Lumber Parallel Strand Lumber

Laminates Glue Laminated Timber Overlayed Materials Laminated Wood-nonwood Composites

Laminate Manufacturing

Structural Composites Glue Laminated Beams FRP Reinforced Glulam Beams Parallel strand lumber Laminated strand lumber

Fiber and Particle based Products

Wood-NonWood Composites Wood Fiber-polymer Composites Inorganic-bonded Composites Wood Fiber-Agricultural Fiber Composites

Grade Stamps for Plywood and OSB Courtesy of TECO and APA

Adhesives for Bonding Curing Types Phenol - Formaldehyde – Construction Plywood/OSB Urea - Formaldehyde – Particle Board, MDF Melamine - Formaldehyde – Decorative Laminates, Paper Coatings Isocyanates – Composites from Strands Bio-Based – Proteins, Glues VOC Emissions – Laminated lumber

Laminate Flooring Issues Lumber Liquidators stops selling Chinese laminates Reacts to concerns over levels of formaldehyde in laminate flooring Published: May 08, 2015 12:30 PM

Important Physical and Mechanical Properties Density Moisture Absorption and thickness Swelling Linear Expansion Modulus of Elasticity Modulus of Rupture Tensile Strength Compressive Strength Internal Bond Impact strength Hardness Fastener Holding Capacity

Treated Wood Treatments/Preservatives Fire Resistance Fungal Resistance Termite Resistance Reduced Water Absorption

Activity 1 – Designing a composite flooring tile and testing its impact properties Objective – To study the how material properties and design can influence the hardness and impact strength of a laminated flooring tile. Materials – Wood Veneer, Styrofoam sheet, Plastic Sheet , Cardboard, Glue, and impact testing jig Method – ASTM D 1037, PS 1-07 (Drop ball test) Plot load versus deflection and note failure mode Materials Test 1  Test 2  Loads (gram)   Deflection (mm)

Activity 2 – Evaluating Moisture Properties Objective – To study the moisture characteristics of different engineered materials Materials – Five different engineered wood composite materials Method – ASTM D 1037 (2 hour Soak) Calculate (%) – Water Absorption (WA), Thickness Swelling (TS), Volumetric Change (VC) Formula - % WA = (Soak wt. – Original wt.) / Original wt.*100 Materials 1 2 3 4 5 WA (%) TS (%) VC (%)

Video of engineered composite material testing http://www. youtube Questions ??