## 1 Introduction  
In engineering, specifically in the field of construction, the aim is to use raw materials of the highest quality and at an affordable cost that allows for efficient construction. However, the materials commonly used in this sector (such as steel, concrete, and brick) emit more greenhouse gases than a design made of wood. Replacing these materials with wood could reduce global CO\({}_{2}\) emissions by 14-31% and global fossil fuel consumption by 12-19%, making a key contribution to the fight against climate change [1; 2; 3]. Solid wood is characterized by the presence of cracks, knots, growth stress, and limited length [4]. This is why wood composites were introduced, and among them, the creation of Laminated Veneer Lumber (LVL) arose from the need to upgrade solid wood's mechanical properties. LVL is an engineered wood-based product manufactured from veneers that are rotary peeled, dried, and laminated together with parallelly oriented grains under heat and pressure with a waterproof adhesive and whose veneer grain is usually oriented in a single direction, although cross-grained sections are also manufactured to offer tailored mechanical properties. Applications include beams, columns, headers, joists, rafters, scaffold planks, and truss chords [5; 6; 7]. LVL is a reconstituted dimensional timber that is usually twice the strength of dimensional timber of the same species manufactured from rotary peeled veneers of spruce, pine, or Douglas fir of 3 mm thickness; in general, their mechanical properties are more uniform compared with solid timber [5; 8]. However, microlaminated boards produced from these tree species have low mechanical properties, and they attain good dimensional stability, good homogeneous mechanical properties, and great durability [4, 7]. In order to generate an increase in LVL physical-mechanical and thermal properties and a high structural application, the addition of engineered fiber fabrics, such as carbon or basalt fiber, as reinforcement for LVL boards can be a great opportunity. Nowadays, carbon fiber (CF) and basalt fiber (BF) are typical reinforcing materials in polymer composites, and recently, BF has been subjected to more investigation [9]. The advantages of carbon fiber (CF) compared to other reinforcement fibers are its low density, high tensile strength, stiffness, and chemical resistance [10]. Carbon fiber is a great option to use as reinforcement in structural terms, as well as in aerospace, automotive, and wind energy sectors, among others. Despite its great advantages, CF's main problem is a high production cost, which creates a considerable advantage for basalt fibers (BF), whose price is one-third that of carbon fiber. Among the benefits of basalt fiber are that it has high thermal resistance, high thermal insulation, high corrosion resistance and is environmentally friendly [10, 11]. To generate the adhesion of the reinforcement fibers with wood, two types of adhesives will be studied. The first one is epoxy resin (ER), a thermosetting adhesive of high rigidity, resistance to chemicals, low shrinkage, and excellent thermo-mechanical characteristics [12]. The second one corresponds to a thermoplastic adhesive: Bicomponent Polyvinyl acetate (PVAc) type D4. Among its advantages are resistance to humidity under controlled environmental conditions, its price compared to epoxy resin, faster solidification, easier handling, cleanability, and lower environmental impact [13]. This last feature is related to the fact that, currently, most Fiber Reinforcement Polymers (FRPs) use epoxy or polyester resins as a matrix [14], but there are other adhesives that are less harsh to the environment than conventionally used resins, such as the PVAc adhesive that could substitute the polymeric matrix of FRP [13].