
[木] 收縮率;[木] 收縮比;收縮化
It is indicated the said crack is due to too small shrinkage ratio of the compacting ***.
指出,拉絲模内孔之所以産生裂紋,是由于壓模收縮比太小的原因。
The results show that, after soaking by acid rain, dry heat shrinkage ratio of the leather increases, and the dry thermostability decreases.
結果表明:經過酸雨浸泡後,加脂皮革的幹熱收縮率均高于未浸泡試樣,耐幹熱性能下降。
Ultra light high strength, thermal insulation, waterproof, and the surface adhesion strong, activist and arch, not crack, dry shrinkage ratio as well as good.
超輕高強、保溫隔熱、防水防潮、與基面結合力強、集體性好、不起拱、不裂縫、幹縮比好等優點。
The effects of polypropylene fiber on the plastic shrinkage stress and plastic shrinkage ratio of the mortars were investigated by use of a self-designed measuring device.
采用自行研制的水泥砂漿塑性收縮應力測試裝置和非接觸式測長裝置,分别研究了低摻量的聚丙烯纖維對水泥砂漿塑性收縮應力和塑性收縮率的影響。
At the same time, the relation between the shrinkage ratio of combination yarn in the boil water and spinning processing parameter, especially the temperature of heated...
同時探讨了紡紗工藝參數——熱闆溫度、芯絲拉伸倍數、紗線撚度、網絡度等與變形紗沸水縮率間的關系。
|shrinking percentage/contraction ratio;收縮率;[木]收縮比;收縮化
在工程學和材料科學領域,"shrinkage ratio"(收縮率)指材料在失去水分或經曆相變過程中體積減少的量化指标,其定義為收縮體積變化量與初始體積的比值。該參數對土木工程中的地基沉降評估和混凝土結構耐久性分析具有重要指導意義。
根據美國材料與試驗協會(ASTM)标準D427的規範,收縮率計算公式為: $$ S_r = frac{V_0 - V_d}{V_0} times 100% $$ 其中$S_r$代表收縮率,$V_0$為初始體積,$V_d$為幹燥後體積。英國标準協會(BS 1377)補充規定當涉及黏性土時,需結合液限和塑限參數進行修正計算。
在岩土工程實踐中,該指标主要應用于:
美國國家科學院下屬的交通運輸研究委員會(TRB)通過NCHRP項目研究發現,黏土礦物成分中蒙脫石含量每增加10%,收縮率将提升1.2-1.8個百分點。該結論已被收錄于《公路路基設計手冊》(第5版)第3章第7節。
“Shrinkage ratio”(收縮率)指物體在特定條件下尺寸變化的比率,通常以百分比形式表示。以下是詳細解釋:
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