ep116:انواع الخشب: مميزاته و الفرق بين ماسيف/لا طي/ستراتي/types bois:massif et composit

nawal benjelloun October 27, 2023
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#شرح #bois شرح و كيفية تعرف على انواع الخشب و ما الفرق بين لوح#ديكورات الاطي#MDF#stratidecor#decoration #bois #massif#chene#hetre#noyer الخشب اللين هو نوع من أنواع الأخشاب الخفيفة التي تحتوي على مساماتٍ كثيرة، ولا يعني هذا بالضرورة أنّها أقل صلابةً من أنواع الأخشاب الأخرى، والخشب اللين يتنج من الأشجار الصنوبرية، مثل الصنوبر، والأرز، والتنوب، وتتواجد هذه الأشجار بأعدادٍ كبيرة في النصف الشمالي من الكرة الأرضية، ويعد الخشب اللين مناسبًا لصناعة الأثاث، وعمليات البناء الداخلية، وتعديلات المنازل، وغيرها من الاستخدامات الداخلية، حيث يعد الخشب اللين معرضًا للتآكل وتغيرشكله نتيجة تعرضه للعوامل البيئية الخارجية، مثل الرياح، ودرجة الحرارة، والرطوبة، أو حتى الزيوت، والأوساخ، وغيرها. ويتم غالبًا تغطية الخشب اللين بطلاءٍ سميك لحمايته من أي ضرر، وعلى الرغم من ذلك إلا أنه يوجد أصنافٌ من الخشب اللين أكثر متانة من الأخشاب الأخرى مثل خشب الطقسوس، ويمتاز الخشب اللين بتكلفةٍ إنتاجية قليلة مقارنةً مع بقية أنواع الخشب، وذلك بسبب سرعة نمو أشجار الأخشاب اللينة، ووصولها السريع إلى مرحلة النضج، بالإضافة إلى جذورها المستقيمة وغير المتعرجة التي تسهّل من عملية التقطيع والتشكيل. خصائص واستخدامات الخشب اللين إن للخشب اللين خصائص واستخدامات عديدة، ومن خصائصه أنه خفيف الوزن، وناعم السطح، وسهل التعامل معه، وسهل النقل، وأقل متانة، ولكنه يتمتع بمساميةٍ عالية تمكنه من امتصاص المواد اللاصقة والحافظة بسهولة، فمثلًا يعد الصنوبر المعالج ذو متانةٍ وقوة عالية، حيث أنه مقاومٌ للبكتيريا، والفطريات، والرطوبة، وبعض الحشرات مثل النمل الأبيض، ويستخدم الخشب اللين المعالج في العديد من المشاريع المنزلية، وفيما يلي نذكر بعض استخدامات الخشب اللين المعالج: التصفيح، أو كسوة المباني . صناعة لوحات وأرصفة خشبية. صناعة الأرضيات الخشبية. صناعة كسوة للجدران بأشكالٍ مختلفة. تشكيل هياكل خشبية قبل البناء . صناعة الأسقف. صناعة الأعمدة. صناعة الطاولات والخزائن. الفرق بين الخشب اللين والخشب الصلب تتعدد الاختلافات بين الخشب اللين والخشب الصلب، وفيما يلي نذكر أهم أوجه الاختلاف بينهما: نوع البذرة: يأتي الخشب اللين من الأشجار عارية البذور، أما الخشب الصلب فمن الأشجار كاسية البذور. الاستخدامات: يستخدم الخشب اللين يستخدم في صناعة النوافذ والأبواب والأثاث، أما الخشب الصلب فيستخدم في بناء المنازل، والطوابق، وقطع الأثاث عالية الجودة. أنواع الأشجار: يتم أخذ الخشب اللين من أشجار الصنوبر، والتنوب دوغلاس، والعرعر، والأرز، والخشب الأحمر، والتنوب، والطقسوس، أما الخشب الصلب فيؤخذ من أشجار الدر، والزان، والجوزية، والماهوجني، والقيقب، والبلوط، والساج، والجوز. الكثافة: تمتلك معظم أنواع الخشب اللين كثافةً أقل من أنواع الخشب الصلب. التكلفة: غالبًا ما تكون تكلفة الخشب اللين أقل من تكلفة الخشب الصلب. النمو: تنمو أشجار الخشب اللين بسرعةٍ أكبر من الخشب الصلب. تساقط الأوراق: أشجار الخشب اللين تحتفظ بأوراقها على مدار السنة، أما أشجار الخشب الصلب فتتساقط أوراقها في فصل الخريف. المقاومة ضد الحريق: الخشب اللين لديه قدرة أقل على مقاومة الحريق مقارنةً بالخشب الصلب.

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