膨脹縫 的英文怎麼說
中文拼音 [péngzhàngféng]
膨脹縫
英文
dilatation joint-
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。Standard specification for preformed sponge rubber cork and recycled pvc expansion joint fillers for concrete paving and structural construction
混凝土鋪面和結構建築用預制微孔橡膠軟木和可回收的pvc膨脹接縫填料的標準規范Taking into account hong kong s warm and humid weather, carpenters purposely leave narrow gaps between floorboards to allow for expansion
由於香港天氣潮濕溫暖，工人鋪地板時會在木條之間預留幼縫，以供日後膨脹之用，避免拱起變形。In the dam foundation restraint area, mgo can be mixed into concrete to prevent dam longitudinal crack. research on autogenous volume change of rcc mixed with mgo, and research on thermal stress compensation of darn foundation prove that rcc mixed with mgo plays a role in dam crack control
在材料措施方面，深入研究高碾壓混凝土壩基礎約束區採用外摻mgo措施，利用其微膨脹性能補償壩體降溫過程中產生的溫度應力，以防止大壩縱向裂縫的發生。Stitched belt loops for anti - bulging device
縫上的帶扣用於防膨脹Abstract : a manufacture method of a major diameter circline weldless u - expansion joint by hydrostratic forming is introduced, a calculation formula of loading with hydrostratic forming is given by stress analysis
文摘:簡要介紹了液壓成型大直徑無環焊縫u形膨脹節的方法，通過應力分析，給出了液壓成型的加載內壓計算公式。There is an old saying in our field - " no dam is not crackable ". the crack is mainly because of the bad dilation after " alkali - aggregate reaction ", the temperature traverse inside and outside the concrete with the happening of heat evolution and the shrink of volume due to the cooling of concrete
水電行業有句「無壩不裂」的俗話，產生裂縫的原因主要有「堿集料反應」造成的破壞性膨脹，水泥水化過程中放出的熱量出現的混凝土內外溫度梯度和水泥石硬化後由於後期降溫發生的體積收縮等造成。Standard specification for preformed expansion joint filler for concrete bituminous type
混凝土用預制膨脹接縫填充料Test methods for preformed expansion joint fillers for concrete construction nonextruding and resilient types
混凝土結構用預制膨脹接縫填料的試驗方法Used to concrete seam and arbitrarily shape seam in component. in the condition of the expanding being favorable limited, attain satisfied stop - water effect and manage the concrete interstitial leaking. at the same time, it can be also used to shipping and engine etcindustrial equipment
適用於現場澆注的混凝土施工縫和嵌入構件任意形狀的接縫內，在其膨脹受到良好限制的條件下達到滿意的止水效果，治理混凝土裂縫的漏水，同時也用於船舶、機車等工業設備的防水密封。Based on the cause analysis for failure of water stop of tunnel ' s cast in site circular construction joint from theoretical and constructional point of view as well as the working mechanism of expansive water stop proposed in terms of width of construction joint, the relation between width of circular construction joint and water pressure resistance of water stop is established and its model test carried out
首先從理論和施工角度分析了隧道現澆環向施工縫止水條的失效原因，然後從施工縫張開度的角度提出了膨脹止水條止水的原理，在此基礎上建立了施工縫張開度與止水條抗水壓力之間的關系，並進行了模型試驗。Expanded polystyrene case - bay fillers for concrete floors with prefabricated binders and dividing floor
預制梁和現場澆注混凝土樓板斂縫用膨脹聚苯乙烯To specify the project, by selecting materials, choosing construction methods, arranging construction process, locating expanding joints, disposing key construction, the outside shell temperature was controlled not exceeding + 25 at surroundings, which met the need of design and check requirement
針對工程具體情況，通過材料選擇、施工方法確定、施工程序安排、膨脹縫的布置、關鍵結構的處理等問題，得出使爐墻外壁溫度控制在環境溫度+ 25的范圍內，滿足設計及施工驗收規范要求的方法。Based on several actual cases, the temperature control measures for roller compacted concrete ( rcc ) gravity dam and arch dam such as structural jointing for construction ; lowering of concrete placing temperature ; water pipe cooling ; surface insulation ; inclined - layer placing etc., the measures to improve the material properties i. e. the application of micro - expanding concrete ; enhancement of material crack - resistance property and the requirement for the simulative analysis on both the temperature field and stress field as well as some problems concerned are summarized herein on the basis of the analysis on the material properties ; construction characteristics and the changing characteristics of the thermal stress of roller compacted concrete
摘要從碾壓混凝土的材料特性、施工特點、溫度場溫度應力的變化特點入手，結合幾個工程總結了碾壓混凝土重力壩、拱壩的分縫方式，降低澆築溫度、水管冷卻、表面保溫、施斜層碾壓等溫控措施，採用微膨脹混凝土、提高材料抗裂性能等改善材料性能措施及碾壓混凝土溫度場、應力場模擬分析的要求和應注意的問題。The technique of dam construction by weakly expansive concrete added with magnesia ( wecam ) is a new technique developed in china, in which appropriate light - burnt magnesia is added to dam concrete when produced to generate a special delayed expansive stress to compensate shrinking stress due to decrease of temperature so as to prevent concrete cracks. it not only is in favor of simplifing the method of temperature control and an effective solution to the crack problem of concrete dam, but also simplify the technology of dam construction and bring down the project cost, further more, speed greatly up the construction of concrete dam
外摻氧化鎂微膨脹混凝土築壩技術是指在生產大壩混凝土時，摻入適量的輕燒氧化鎂，利用其特有的延遲膨脹補償混凝土壩的溫度應力，以防止混凝土壩產生的裂縫，這不僅有利於簡化溫控措施，有效地解決混凝土壩的開裂問題；而且簡化了施工工藝，降低了工程造價，大大了加快施工進展。Asphalt expansion joint
瀝青膨脹縫In this model the anisotropic constitutive models of concrete are introduced according to its different behaviors under compressive stress and tensile stress, and it is considered that a certain amount of rust product is carried away from the rust layer around the reinforcement and deposited within the open cracks after the cover cracked, which will reduce the expansive pressures
由於混凝土拉壓性能的不同，應用各向異性本構關系，並考慮保護層開裂以後，鋼筋的銹蝕產物會有部分滲透到裂縫中，降低銹蝕產物對保護層的膨脹壓力，對鋼筋銹蝕膨脹應力進行了計算。Secondly, the producing mechanism of crack in reinforced structure and factors which affect crack have been discussed, in the emphasis, the method is expounded, which applies first releasing then resisting, combination of releasing and resisting. in the method, flexible slit is applied firstly, which can make deformation of structure distributed, and decrease deformation energy, then the tiny expansion concrete and prestressed concrete with unbonded tendons are applied. and in the different phase, the compressive prestress is put on the concrete structure
其次，分析並論述了鋼筋混凝土結構裂縫產生的機理和影響因素，著重闡述了「利用先放后抗，抗放結合，綜合控制」的方法：即首先利用后澆帶，使混凝土結構分段變形，減小超長變形的影響；並採用微膨脹混凝土技術及無粘結預應力混凝土技術，分階段對混凝土結構施加一定的預壓應力，從而減小或完全抵消混凝土結構因混凝土硬化收縮引起的拉應力；再結合一些其他措施，成功實現鋼筋混凝土結構的超長無縫設計與施工。The main work done in this paper is as follows : ( 1 ) simulate the temperature field of basement wall by ansys software, sum up the characteristics of the temperature field of basement wall, and analyze the influence of the types of the molding board, environmental change and cement content ; ( 2 ) the whole simulation analysis process of early - age concrete stress field is realized by sub - development of ansys, and cts - ansys software is developed with fortran ; ( 3 ) based on the cause of cracking, the influence of the thickness of the wall, length, bar arrangement, mix proportion, expanding agent, etc, on the wall stress due to concrete creep and temperature change is analyzed
本文主要進行了以下幾個方面的研究： （ 1 ）利用ansys軟體，模擬了施工期地下室側墻溫度場，總結了地下室側墻溫度場分佈的特點，分析了模板類型、環境變化和水泥用量等對墻體溫度場的影響； （ 2 ）以大型通用有限元軟體ansys為平臺進行二次開發，運用visualfortran語言編寫了cts - ansys程序，實現了施工期混凝土徐變溫度應力的模擬計算； （ 3 ）從裂縫形成的原因出發，分析了地下室側墻厚度、長度、配筋率、配合比、膨脹劑等因素對墻體徐變溫度應力的影響。The results shows that the combined use of fibers and expansions was superior to the use of fibers or expansion agents alone in reducing the amounts of plastic shrinkage cracks and diminishing the size of cracks, and it improved the resistance to plastic shrinkage crack extremely
文章研究了聚丙烯纖維和膨脹劑復合對砂漿塑性收縮裂縫的影響，結果顯示，纖維與膨脹劑復合，在減少塑性收縮裂縫數量和細化裂縫兩個方面均優于纖維或膨脹劑的單獨作用，砂漿抵抗塑性收縮開裂能力顯著提高。分享友人