تاثیر استفاده از خاک اره راش و اکالیپتوس به عنوان مواد مکمل در بهبود عملکرد تخته های کامپوزیتی سیمانی

نوع مقاله: مقاله عمران

نویسندگان

دانشگاه سمنان

چکیده

در این مطالعه، به بررسی آزمایشگاهی استفاده از خاک اره چوب‌های راش و اکالیپتوس، به عنوان مواد مکمل در ساخت تخته‌ های کامپوزیتی چوب - سیمان پرداخته شده است. درصد اختلاط این مواد مکمل به عنوان عوامل متغیر و میزان سیمان 60 درصد به عنوان عامل ثابت در ساخت تخته های کامپوزیتی چوب- سیمان در نظر گرفته شده است. در کل 5 نمونه اصلی و از هر نمونه 3 تکرار و در مجموع 15 تخته کامپوزیتی ساخته شده و خواص فیزیکی و مکانیکی تخته‌های ساخته شده براساس استاندارد 68763 DIN مورد بررسی قرار گرفته است. سپس اثر عوامل متغیر بر روی خواص فیزیکی و مکانیکی تخته‌ها مقایسه شده است. نتایج نشان داده است که تخته های کامپوزیتی چوب‌ - سیمان ساخته شده از خاک اره چوب‌های خالص اکالیپتوس کمترین مقاومت خمشی، مدول الاستیسیته و مقاومت به ضربه را در مقایسه با تخته کامپوزیتی چوب- سیمان ساخته شده از خاک اره چوب خالص راش دارا هستند. همچنین با افزودن خاک اره چوب راش (بیشتر از ده درصد) همراه با اکالیپتوس، بهبودی در حدود 30 درصد در مقاومت‌های تخته کامپوزیتی چوب- سیمان ساخته شده، حاصل گردید. همچنین با اضافه کردن درصدهای مختلف خاک اره راش به اختلاط اکالیپتوس و سیمان میزان جذب آب در آزمایش 24 ساعته از 34/14 درصد به 88/13 درصد کاهش داشته است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effects of beech and eucalyptus sawdust as a supplementary material to improve the performance of composite panel

نویسندگان [English]

  • Mahdi Ebadi jamkhaneh
  • Masoud Ahmadi
  • Hosein Naderpour
چکیده [English]

The use of wood fibers and recycled paper fibers in cement composites has many advantages. Wood fiber reinforced composites are easy to cast or mold into a desired shape, resistant to fire, as well as being resistant to harmful effects of sunlight, rain, and insects. These composites also have low thermal conductivity, a great degree of processing flexibility, in addition to helping eliminate environmental pollution by recycling wood fiber. The present study seeks to investigate the effect of eucalyptus and beech wood flour on the mechanical properties of wood–cement composites. Five levels of wood (0%, 8%, 20%, 32% and 40%) and one level cement (60%) were used. Totally 15 composites were produced. The composites were manufactured using hot press and tested based on DIN 68763 standard. After preparation of test samples, mechanical properties (bending and hardness) and physical properties (water absorption and thickness swelling) were measured. Results showed that addition of both fillers reduced modulus of rupture and increased modulus of elasticity, water absorption and thickness swelling. The Eucalyptus present in composite wood-cement caused a reduction in mechanical and physical properties can use with Beech wood flour.

کلیدواژه‌ها [English]

  • Composite Panel
  • Cement
  • supplementary material
  • beech
  • eucalyptus

 

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