Fiber–cement composites have been mainly reinforced with cellu- lose pulps. The use of cellulose fibers in composites is important because of the retention of Portland cement particles in the Hatschek process and some reinforcement effects in the early ages. Pinus pulp has replaced asbestos fiber as a reinforcement agent in commercial Portland cement products in conjunction with polyvinyl alcohol (PVA) fibers for air-cured (non-autoclaved) products [1,2]. A consider- able research effort has been made to apply fast growing agricultural crops and crop residues as cheaper alternatives for the fiber supply, especially in countries with limited forest resources [3].