sand cracking 中文意思是什麼
sand cracking
解釋
砂子爐裂解-
The quality of furan sand castings is usually better than clay sand castings, however, some defects are also very easy take place with furan sand castings such as blow hole, metal penetration, veining, cracking, slag inclusion, hardness too low, surface recarburation, surface sulphuration, nodularity degeneration etc, which were usually caused by improper raw materials selection, improper method design, incorrect moulding or / and core - making
摘要呋喃樹脂砂鑄件質量一般比黏土砂鑄件好，但如果原材料選擇、工藝設計、造型和制芯操作不當，也會產生氣孔、粘砂、脈紋、裂紋，夾渣、硬度不足、滲碳、滲硫和球化不良等鑄造缺陷。 -
The geological conditions are very complicated in hejiazhai tunnel which is located in guizhou shuibo railway, this tunnel is named " mashed tunnel " with the most difficult geological conditions such as the high dense gas and developed karst and gushing water assembled together, the geological hazards like the gushing water and sand, the collapse of tunnel, surface subsidence and slide, cracking of tunnel lining were often happened during construction period
摘要貴州水柏鐵路何家寨隧道，工程地質條件極其復雜，集「高瓦斯、強巖溶、大涌水」為一體，施工期間曾發生多次涌水涌砂、洞內坍方、地表塌陷與滑坡、支護襯砌開裂變形等地質災害，堪稱水柏鐵路施工難度最大的「爛洞子」 。 -
Good cracking - resistant : nfs has high density and has very low cracking rate when re - used that make it more good to environment for the less sand powder occured
耐破碎性好：鑄寶砂的緻密性好，強度高，即使重復再生使用也很少破碎，減少鑄造生產過程中的粉塵對生產環境的污染，再生性好，減少產業廢物排放，利於環境保護。 -
To the chill climate character on neimeng region, this paper selects the suitable cement content for decreasing temperature contraction cracking on road base through the test of cement stabilized sand - gravel material
本文針對內蒙地區寒冷的氣候特點，通過水泥穩定砂礫材料特性研究，確定了合適的水泥劑量，以減輕基層產生溫縮裂縫。 -
In this paper, two factors that will threaten the operating stability were studied, which are sand abrasion and cracking of the blades. and other problems that affect the safety in production were discussed
本文對影響小浪底電站穩定運行的泥沙磨損問題和轉輪裂紋問題進行了詳細的分析，並對其它影響機組穩定運行的現象進行了研究。 -
Because of the special water quality, sand abrasion is a severe menace to the operate stability of the units in xiaolangdi hydropower plant. in addition, some problem occurred during the operation of the units. among them, cracking of the blades is very severe
另外，小浪底電站水輪發電機組在運行的期間出現了一些異常現象，其中轉輪裂紋問題比較嚴重，對小浪底電站的穩定運行產生了很大的影響。 -
2 ) to a certainty of sand percentage, concretes with moderate critical sand percentage which changed in about 36 % - 43 % were more sensitive to plastic shrinkage cracking than concretes with lower or higher sand percentage. 3 ) concrete made with lower strength grading cement was more prone to plastic shrinkage cracking than that of concrete made with higher strength grading cement
4 ）粉煤灰和硅灰對混凝土塑性收縮裂縫的影響與拌合物的實際水膠比有關，存在一個水膠比界限，在此界限之上，摻入粉煤灰或硅灰的混凝土較易開裂，在此界限之下，粉煤灰或硅灰高性能混凝土對塑性收縮裂縫具有抑制作用。 -
It provided the reference to improve the anti - cracking capability of high strength and high performance concrete from the point of view of constructional technology and curing requirement. the result shows that the more the binder material or sand rate, the more serious the shrinkage cracking
最後運用該軟體分析在外界溫濕度變化以及不同養護條件下，混凝土內部的溫濕度變化規律及其由此引起的溫度應力和濕度應力，為從施工養護方法上改善高強高性能混凝土抗裂性能提供參考。 -
In this paper, the influences on concrete shrinkage and splitting tensile strength by the varieties and contents of the raw materials, such as cement, sand, fly ash, water - reducer and expansion agents, are studied. the possibility of the prevention of the concrete cracking by proper concrete proportion design is discussed
本文著重研究了水泥、砂、粉煤灰、減水劑、膨脹劑等材料的品種、用量對混凝土收縮性能及混凝土劈裂抗拉強度的影響，探討了通過合理的配合比設計達到減少混凝土收縮、提高混凝土劈裂抗拉強度進而降低混凝土開裂風險的可能性。
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