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شن و ماسه قسمت اصلی بتن را تشکیل میدهند. وبا توجه به مقاومت ساختمانهای بتنی در مقابل عوامل جوی و عمر طولانی تر آن نسبت به ساختمانهای فلزی و آجری؛ و همچنین با توجه به امکان تهیه سریع و ارزان و آسان مصالحی که برای ساختن ساختمانهای بتنی مصرف میشود که قسمت عمده شن و ماسه میباشد، جا دارد در مورد شن و ماسه مطالعات بیشتری صورت گیرد. جنس و خصوصیات مختلف شن و ماسه در هر ناحیه متفاوت میباشد به این دلیل مطالعات انجام شده ممالک دیگر بهطور کامل و دقیق برای ما قابل استفاده نیست چه بسا برای مملکت پهناوری مثل ایران باید شن و ماسه و حتی سنگ و خاک هر ناحیه بهطور جداگانه مورد مطالعه قرار گرفت…
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