Mọi người ơi trong đoạn này thì formed joints và unit of deposit là gì ạ? (về khoan lấy mẫu lõi bê tông)"Core Drilling: A core specimen taken perpendicular to a horizontal surface shall be located, when possible, so that its axis is perpendicular to the bed of the concrete as originally placed and not near formed joints or obvious edges of a unit of deposit. A specimen taken perpendicular to a vertical surface, or perpendicular to a surface with a batter, shall be taken from near the middle... Mọi người ơi trong đoạn này thì formed joints và unit of deposit là gì ạ? (về khoan lấy mẫu lõi bê tông)"Core Drilling: A core specimen taken perpendicular to a horizontal surface shall be located, when possible, so that its axis is perpendicular to the bed of the concrete as originally placed and not near formed joints or obvious edges of a unit of deposit. A specimen taken perpendicular to a vertical surface, or perpendicular to a surface with a batter, shall be taken from near the middle of a unit of deposit when possible and not near formed joints or obvious edges of a unit of deposit."
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