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"کرمو یا شن نما شدن بتن" ظاهری کاملاً متفاوت با "عدم تراکم کافی بتن" دارد. متأسفانه اغلب مهندسین، تکنیسینها و دستاندرکاران اجرای سازههای بتنی این دو عیب را یکسان میشمارند. این در حالی است که: – در بتن کرمو یا شن نما شده، ذرات درشتدانه (شن) در کنار هم دیده میشود که فضای بین آنها فاقد ملات و شیره کافی است. – در یک بتن غیر متراکم ممکن است فضاها...
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