Optimization of processing variables and mechanical properties in rubber-wood particles reinforced cement based composites manufacturing technology |
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| Affiliation: | 1. Beijing New Building Material Group, Beijing 100024, China;2. China Building Materials Academy, Beijing 100024, China;3. Composite Wood Products, FP Innovations, QC, Canada;1. Dept. Physics, Cal Poly, San Luis Obispo, CA 93407, USA;2. National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK;1. Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani 34190, Thailand;2. Faculty of Science, Laboratory of Advanced Polymer and Rubber Materials (APRM), Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand;3. Department of Physics, Faculty of Science, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani 34190, Thailand;4. National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand;1. Department of Polymer Engineering, Amirkabir University of Technology, Tehran 15875-4413, Iran;2. Department of Mechanical Engineering, Amirkabir University of Technology, Tehran 15875-4413, Iran;1. Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology, Xi’an, Shaanxi 710048, People’s Republic of China;2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, People’s Republic of China;3. State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, People’ Republic of China;1. Department of Forestry Science, Federal University of Lavras, Lavras, Brazil;2. Department of Forestry Science, Rural Federal University of Amazonia, Belém, Brazil |
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| Abstract: | The manufacturing processes of rubber crumb–wood particle reinforced cement based composites (RWCC) which shortened the pressing cycle and enhanced the properties were completely investigated. Meanwhile, optimal processing conditions as well as properties of strength were tested to validate the predicted variables and properties. Mechanism effects of interacting process variables [density, duration of pressure time (namely, pressure time) and pressure] on properties of RWCC were opened out. The RWCC performance was evaluated by measuring its flexural strength (FS), modulus of elasticity (MOE) and internal bond (IB) strength. The experimental results were statistically analyzed by using Response Surface Method (RSM) software to identify the significant manufacturing process variables for RWCC. In the process variables, density and duration of pressing time had more significant influences on mechanical properties (FS and MOE and IB), but had little effect on strength performance caused by pressure. In addition, the microstructure of RWCC was clearly examined by using a scanning electron microscope (SEM). The mechanism effects were also revealed through analyzing the microstructure of the interface of rubber crumb/wood particle/cement. The results of a comprehensive evaluation for properties of RWCC with the highly active polymeric methylene diphenyl isocyanate adhesive (PMDI) as binder system not only present excellent mechanical properties, but also possess some of functional properties such as optimized acoustic properties and energy conservation. Finally, the optimal manufacturing process parameters were obtained by means of the maximizing mechanical properties. |
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