花崗石平板的鑒定方法
新(xin)制(zhi)的(de)(de)巖(yan)石平板(ban)應(ying)標(biao)有制(zhi)造廠名(或廠標(biao)),準(zhun)確度(du)級別、規(gui)格和編號。巖(yan)石平板(ban)工(gong)作面(mian)應(ying)色(se)澤均勻,不(bu)得有裂紋、凹(ao)陷及組織疏(shu)松(song)現象,且不(bu)應(ying)有磨(mo)痕、劃傷、shaoshang及影(ying)響平板(ban)準(zhun)確度(du)的(de)(de)其(qi)他(ta)缺(que)陷。使(shi)用中的(de)(de)平板(ban)允許有不(bu)影(ying)響準(zhun)確度(du)的(de)(de)上述缺(que)陷。巖(yan)石平板(ban)工(gong)作面(mian)出現的(de)(de)凹(ao)陷或掉角不(bu)允許修補。檢定(ding)方法采用目力觀(guan)察和試驗。
平板規格/mm×mm | 表面粗糙度Ra值/m | ||||
工 作 面 | 側面 | ||||
準 確 度 級 別 | |||||
00 | 0 | 1 | 2 | 3 | 各級 |
≤400×400 | ≤0.32 | ≤0.63 | ≤1.25 | ≤2.5 | ≤5 |
>400×400 | ≤0.63 | ≤1.25 | ≤2.5 |
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