Comparative study on properties of different straw fiber cement composites

In order to explore the effect of several common crops (wheat, corn, rice) straw on the properties of cement-based materials, the straw fiber-cement composites were prepared by dividing the straw into cement. The physical and mechanical properties of the three composites were investigated by different pretreatment methods, fiber content and fiber length. The results show that the hemicellulose content in straw decreases greatly in three pretreatment methods (cold water, 4% NaOH solution and hot alkali), and the effect of straw on retarding time of cement is weakened obviously. The increase of dimension length is disadvantageous to the mechanical strength of the composites; after pretreatment, the physical and mechanical properties of the three kinds of straw fiber-cement composites are improved. The optimum order of the three kinds of straw as cement additives is wheat > corn > rice.