shrinkage cracking 中文意思是什麼

shrinkage cracking 解釋
收縮開裂
  • shrinkage : n. 1. 皺縮；縮水；減縮；減少。 2. 【物理學】縮誤；縮減量；（肉類在運輸、加工過程中的）重量的損耗。 shrinkage in the market place 市場萎縮。
  • cracking : adj 分裂的，分解的；〈美俚〉極快的，猛烈的。 cracking distillation 【化學】裂解蒸餾（法）。 crack...
  1. The expansion agents can only make up the shrinkage to some extent, and the compensation effects would be reduced when the retardener and fly - ash are used. the expansion agents are not panaceas to avoid the shrinkage cracking as expansion can also reduce the concrete soundness. under bad curing condition, the polypropylene fibrillated film fiber can improve concrete ' s anti - crarking property, while the nominal steels have very unobvious effects. to reduce the concrete shrinkage thus avoid the cracking, the former factors must all be taken into account in concrete proportion design to develop sound concrete

    研究結果表明，水泥的品種和用量是影響混凝土收縮值的主要因素之一，當混凝土中水泥用量超過470kg / m ~ 3時，混凝土的收縮值超過400 10 ~ （ - 6 ） ，在約束狀態下存在高開裂風險；採用細砂使混凝土單位用水量顯著提高，收縮值也大幅增加；優質粉煤灰總體上能抑制混凝土的收縮，以超量方式摻入其抑制作用更加明顯，但粉煤灰混凝土早期的粘聚性較差，應注意養護，以免失水產生龜裂；早強減水劑和緩凝減水劑都會使混凝土收縮值增加；膨脹劑只能補償混凝土部分收縮，同時受緩凝劑和粉煤灰的抑制，而且膨脹使混凝土的體積安定性增加了不確定因素，膨脹劑不是解決混凝土收縮裂縫的良方。
  2. The research and application of organic shrinkage reducing agent ( sra ) and non - organic expansion agent ( ea ) are drawing great attention among that of new - type concrete anti - cracking admixtures

    摘要在新型混凝土抗裂外加劑中，有機類減縮劑及無機膨脹劑的研究與應用受到了廣泛的關注。
  3. This paper analyzes the influence of sra on the shrinkage - cracking property of hpc by designing five check - up experiments including desiccation - shrinkage, autogeous shrinkage, flat - restraint, anti - chloride ion penetration and ultimate tensile strain

    摘要設計了乾燥收縮、自收縮、平板約束、抗氯離子滲透性以及極限拉應變等5種試驗方法來檢驗減縮劑對高性能混凝土收縮開裂性能的影響。
  4. The results of experiment on the relationship between tensile strength, shrinkage, self - desiccation shrinkage and flat restraint cracking show that sra ' s physical shrinkage - reducing effect and ea ' s chemical expansion effect greatly enhance the volume stability of concrete and reduce the probability of early - cracking

    對減縮劑與膨脹劑抗拉強度、干縮、自乾燥收縮及平板約束開裂的試驗結果表明： sra的物理減縮作用及膨脹劑的化學膨脹作用，大大提高了混凝土早期的體積穩定性，降低了早期開裂的概率。
  5. The proportion of plastic shrinkage cracking is rather high in early cracking. the plastic shrinkage cracking would effect construction appearance and promote the propagation of drying shrinkage cracking or other types cracking, but also provide a passage for aggressive agents penetrating and moving to the concrete mass

    塑性收縮裂縫在早期裂縫中佔有相當大的比重，其存在不僅影響工程外觀，促使乾燥收縮裂縫或其它形式裂縫的發展，而且還將為侵蝕性介質向混凝土基體滲透、遷移提供通道，對混凝土的耐久性造成嚴重影響。
  6. Moreover, the autogenous shrinkage and the possibility of cracking in the early stage of the hpc also can be controlled, with the addition of the mineral additives

    摻和料的加入還可以減小混凝土早期的自收縮，減少高性能混凝土早期開裂的幾率。
  7. It has a good compensation to shrinkage, and can improve the anti - cracking and anti - penetrating performance of concrete. it is often added to concrete to produce expanding concrete or the anti - cracking and anti - penetrating concrete, which are widely used in such engineering as waterproofing, anti - penetrating, mending etc. the expansion admixture include at present sulphoaluminate such as uea, ea - l etc ), calcium oxide, and some composite expansion admixtures

    混凝土膨脹劑在普通混凝土中可抵消干縮或溫度降低引起的拉應力，起到良好的補償收縮作用，能提高混凝土的抗裂防滲能力，常用於配製膨脹混凝土或抗裂防滲混凝土，廣泛地應用於防水、抗滲、修補等工程中。
  8. The trends of plastic shrinkage cracking in concretes made with the same water or cement paste content per cubic meter are similar with the above case, but the critical w / c ratio is about 0. 45 - 0. 4 and 0. 4, respectively

    2 ）在一定砂率范圍內，較低和較高砂率對應的混凝土拌合物不易開裂，而中間某一臨界砂率對應的混凝土拌合物開裂較大，這一臨界砂率變化范圍為36 - 43 % 。
  9. In the paper the effects of the made parameters, the main materials and environmental conditions on plastic shrinkage cracking were investigated. it can be concluded as following : 1 ) there was a critical w / c ratio of maximum plastic shrinkage cracking between lower and higher w / c ratio of concrete mixtures made with the same cement content per cubic meter, concretes with lower or higher w / c ratio being less prone to plastic shrinkage cracking and the w / c critical ratio critical of maximum plastic shrinkage cracking being about 0. 5

    本文研究了配製參數、主要原材料以及環境條件對新拌混凝土塑性收縮裂縫的影響，結果表明： 1 ）單方混凝土水泥用量一定時，較低水灰比和較高水灰比對應的混凝土拌合物不易開裂，而中間某一臨界水灰比對應的混凝土拌合物開裂較嚴重，這一臨界水灰比為0 . 5 ；單方混凝土水用量或水泥漿量一定時，混凝土拌合物的塑性開裂趨勢與上述情況相似，但臨界水灰比分別為0 . 45 - 0 . 4和0 . 4 。
  10. Method of test for drying shrinkage cracking of restricted concrete

    約束裂縫混凝土的乾燥收斷裂縫的試驗方法
  11. Effects of water - cement ratio on plastic shrinkage cracking of concrete

    水灰比對混凝土塑性收縮裂縫的影響
  12. The influences of shrinkage - reducing admixture on shrinkage cracking of concrete and its application

    減縮劑對混凝土干縮開裂的影響及其應用
  13. 4 ) the effects of fly ash and silica fume on plastic shrinkage cracking were related to the actual w / b ratio of concrete mixture

    對粉煤灰，這一水膠比界限約為0 . 36 ，對硅灰約為0 . 4 。
  14. The judge criterion of plastic shrinkage cracking for cement based material was studied through the testing of plastic tensile strength and plastic shrinkage capillary stress of cement mortar and concrete

    摘要採用自行設計的塑性抗拉強度、塑性收縮開裂應力測定裝置測試了水泥砂漿、混凝土塑性抗拉強度和塑性收縮開裂應力。
  15. There was a borderline w / b ratio, above which concretes containing fly ash or silica fume were more sensitive to plastic shrinkage cracking than that of concretes without fly ash or silica fume, and below which fly ash or silica fume high performance concretes can restrain the plastic shrinkage cracking

    6 ）在室內控制環境條件下，降低環境溫度、風速以及提高相對濕度均可減少新拌混凝土水分蒸發速率，從而減少塑性收縮裂縫。相比之下，提高環境相對濕度對減少水分蒸發和裂縫更為明顯。
  16. 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。
  17. Effects of shrinkage reducing admixture and polypropylene fiber on early age shrinkage cracking of concrete

    減縮劑與聚丙烯纖維對混凝土早期收縮開裂的影響
  18. 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。
  19. Material better intensity medium shrinkage ; cracking and deformation small, plane smooth. 10. brazilian rosewood : origin of brazil

    材質較好，強度中等，干縮性能良好開裂和變形小，切面光滑。
  20. Study on shrinkage - cracking property of hpc by shrinkage - reducing admixture

    減縮劑對高性能砼收縮開裂性能影響的研究
分享友人
分享到 Line

分享到臉書