根据中华人民共和国国家标准批准发布公告 2 0 0 1年第 8号 :GB/-T14 6 84 - 2 0 0 1《建筑用砂》 ,GB/-T14 6 85 - 2 2 1《建筑用卵石、碎石》两项国家标准已于 2 0 0 2年 2月 1日正式实施。此新国标已经取代了现行标准GB/T4 6 84 - 1993、GB/T14 6 85 - 1993。在新发布的两项 According to the approval of the People’s Republic of China National Standards Announcement 2001 No. 8: GB / -T14 6 84-2001 Construction sand, GB / -T14 6 85 - 2 2 1 “Pebbles for construction, Gravel ”two national standards in February 1, 2002 formally implemented. This new national standard has replaced the current standard GB / T4 6 84 - 1993, GB / T14 6 85 - 1993. In the newly released two