凍凝溫度 的英文怎麼說
中文拼音 [dòngníngwēndù]
凍凝溫度
英文
congealing temperature-
The compatibility and harmony among workability, mechanical grade and durability are optimized, with the ground of adjusting composition and dosage of fd - 1 ; after analyzing anti - freezing damage mechanism, it is concluded that temperature is main factor, which affects structure and property of concrete. after two processes of temperature - elevation of hydration heat and temperature - descent of cold - environment, there is original damage in concrete and its existence leads to temperature fields, as results in temperature damage on transition phase > aggregate and cement mortar of concrete
通過對負溫混凝土早期防凍分析研究認為，環境溫度對混凝土的結構形成及其性能的影響十分突出，水泥水化溫升和環境散熱降溫兩個過程導致混凝土結構內部產生不均勻溫度場，對過渡相、水泥砂漿以及骨料都能產生不同程度的溫度損傷，產生內部溫差應力裂紋，初始損傷也是不可避免的。Experimental results of marshall remnant stability test, water susceptibility tensile strength ratio ( tsr ) test and rutting test show that graphite modified ecac possesses of high anti - water damage ability and excellent high - temperature stability, which is expected to apply as new - type pavement
馬歇爾殘留穩定度試驗、凍融劈裂試驗和車轍試驗表明石墨導電瀝青混凝土的抗水損害能力強，高溫穩定性能良好，可作為新型路面使用。Thaw settlement cause negative friction. this paper base on the thought of " initiative cooling ", aim at three problems existing in common concrete pile used in frozen soil, a new type of pile is proposed to overcome the disadvantages of the classical pile used in frozen soil. pile body within active layer is fluted and refilled with porous materials such as gravels and ballasts, convection will be occur and then thermal exchange inside porous material in winter while only heat conduction exists in summer, as a result the soil around flutings will be cooled, so the top line of permafrost will be drive up
本文基於「主動冷卻」地基的思想，以及針對凍土地區普通混凝土樁存在的三大問題，提出了一種新型樁的設計思路，運用數值模擬試驗手段對其冷卻機理與加固機理進行了系統研究，即在凍融活動層的深度范圍內，在混凝土樁身的表面刻槽，修築完時槽內填充碎石、塊石等多孔介質，通過外界大氣溫度的自然波動下多孔介質在冬季時存在的對流換熱機制，而在夏季只存在熱傳導，來達到主動冷卻樁周凍土和抬升凍土上限的目的。Calcium - enriched fly ash debases the numerical value of critical strength of frozen injury and improves the microstructure because of its form effect, activity, tiny aggregate effect and self - hardening property. so it is feasible to make it an important component of minus - temperature concrete
因為增鈣粉煤灰具有形態效應、活性效應、微集料效應和自凝性、自硬性等優勢，它改善了混凝土的微觀結構，降低了負溫混凝土的抗凍臨界強度，所以增鈣粉煤灰可以作為負溫混凝土的摻合料。With using once artificial freezing method and natural freezing method test the compressive strength of low - temperature concrete at different age and by testing the loss percentage of water ( content of evaporative water ) of saturated specimen test the pore porosity of low - temperature concrete at different age
方法採用恆低溫一次凍結法和自然變低溫多次凍結法，測定混凝土在不同齡期的強度值，利用可蒸發水含量法測定對應齡期的孔隙率。Concrete temperature control in perennial frozen earth area during constructing qing - zang railway
青藏鐵路多年凍土區橋梁昆凝土施工溫度控制As far as i am concerned, minus - temperature concrete has a kind of critical structure, which has a corresponding critical strength, but the contrary conclusion is not true
本文認為，負溫混凝土存在抗凍臨界結構，一個臨界強度對應著一個臨界結構，而一個臨界結構未必僅僅對應一個臨界強度。The experiment also shows that after the concrete strength reach the frost - resisting critical strength, its strength and elasticity module will increase slowly with the decrease of the temperature
試驗還表明，當混凝土強度達到受凍臨界強度后，隨著負溫值的增大其強度緩慢增長，彈性模量也有緩慢增長。Abstract : based on the test results of frost micro pore structure density distribution of high strength concrete at minus temperat ure ( hscmt ), the frost damage fiber bundle model of hscmt was buitl. the purpose is to study frost damage factor of hscmt in the future, to deduce lost efficiency p robability of hscmt and prevent hscmt from frost in cold weather
文摘:根據負溫高強混凝土凍結顯微孔結構密度分佈結果，建立了凍結損傷纖維束模型，為進一步研究負溫高強混凝土的凍結損傷基因，推斷負溫高強混凝土的失效概率，及負溫高強混凝土受凍害的防止打下基礎。So an equation, which calculates the annual times of pavement concrete natural freeze - thaw cycle was developed and the cycle parameters, including temperature decreasing speed of freezing, length of freezing time and lowest freezing temperature were statistically calculated
根據有限差分方法計算得到的我國主要城市鋪面混凝土內部年逐時溫度，進行了鋪面混凝土凍融環境的量化指標統計分析，建立了鋪面混凝土年凍融循環次數的預估方程，統計得到各量化指標的分佈狀況和特徵值。If the cold plate temperature is higher than a certain critical value, for instance, - 12 c under our observed experimental conditions, the higher the air relative humidity is, the bigger the water droplets concreting on the cold plate, and the later the water droplets froze. however, if the cold plate temperature is lower than a certain critical value, the influence of air relative humidity on the frozen time of water droplets was not observed. if the cold plate temperature is higher than a certain critical value, for example, - 20 c under our observed experimental conditions, frost deposition is through condensation, or condensation frosting
結果表明，冷壁面溫度越低，水珠凍結時間越短，且凍結的冰珠越小;當冷壁面溫度高於某一臨界值，譬如，在我們給定的實驗條件下， - 12 c時，空氣相對濕度越大，冷壁面上凝結的水珠越大，水珠凍結越晚，但當冷壁面溫度較低時，幾乎觀察不到空氣相對濕度對水珠凍結時間的影響;冷壁面溫度高於某一臨界值，譬如，在我們給定的實驗條件下， - 20 c時，發生凝結成霜，冷麵溫度低於這一臨界值時，發生凝華成霜;隨著實驗工況的不同，觀察到的霜晶呈現八種不同的形態。The use of special anti - condensing design can protect the kitchen cabinet form being damaged due to expansion, mildew and rot after absorbing the moisture at the bottom of the cabinet, resulting from the condensed water on the quick - frozen food when encountering low temperature of the water tank
特製防溫差凝露，有效防止因冷凍食品放入水槽后，因溫度過低，水氣凝聚盆底形成水珠滴落櫥櫃，造成櫥櫃吸水，膨脹霉爛。Two - addition technique of flying ash and silica fume can meliorate durability of concrete ; air - entraining admixture possesses anti - freezing, descending ice point, and improving workability, and thereof it should be used in concrete. but controlling its dosage is very important to avoid strength loss
發現粉煤灰和硅灰的雙摻技術能夠顯著改善混凝土的耐久性能，引氣劑具備防凍抗凍、抗滲及提高負溫混凝土工作性的優點，在負溫混凝土中應該加大使用范圍，但必須控制其摻量，確保強度損失較小。But during the caring age, if the concrete do n ' t experience the low temperature action of frost - resisting critical strength, its strength will decrease
但若混凝土在養護期內沒有達到抗凍臨界強度受到低溫作用，其強度將降低。Originally from green concrete and concreting in minus - temperature, the critical strength of frozen injury of minus - temperature calcium - enriched fly ash concrete and the rule of strength development are studied in this paper. through the test of resistance of freezing - thawing cycles and chloride diffusivity, the influence of curing system and calcium - enriched fly ash on the performance of concrete are studied ; and through the modern methods ( xrd, sem, and so on ), the hydration products, pore structures and microstructure are studied
本文既著眼于綠色混凝土，又致力於混凝土的負溫施工，研究了增鈣粉煤灰混凝土的抗凍臨界強度及其負溫抗壓強度發展規律;通過快凍試驗和氯離子滲透試驗，研究養護制度和增鈣粉煤灰摻合料對混凝土耐久性能的影響;並通過光學顯微鏡法、掃描電鏡和xrd等現代分析方法，研究負溫增鈣粉煤灰混凝土的水化產物、孔結構和顯微結構。Then the hydrogels of pva and pva - g - nipaam copolymer were made through freezing - thawing processes and the later hydrogels obtained in this method were found to exhibit obvious thermal sensitivity. in addition, the slow release of methylene blue from this kind of hydrogels was studied
採用冷凍-熔融的方法制備了pva ， pva - g - nipaam凝膠，發現pva - g - nipaam凝膠具有溫度敏感性，用相同方法對mb包埋固定並研究了不同溫度下緩釋規律。This paper used the reactive powder concrete ( rpc ) as the inorganic anchoring material, and studied this material ’ s compositions and the materials mechanics properties ( mainly includes compressive strength, shearing strength, elasticity coefficient and poisson ' s ratio ), and also studied the contraction, durability ( including the rpc permeability, chemistry corrosiveness and anti - frozen performance ) and the heat - resistance of rpc
本文採用活性粉末混凝土（ rpc ）為無機錨固材料，並對該材料的配合比，材料力學性能（主要包括抗壓強度，抗剪強度，彈性模量和泊松比）進行研究，還分析了rpc的收縮性、耐久性能（包括rpc的滲透性、化學侵蝕性和抗凍性能）和耐高溫性能。Making use of the transformed pressure test machine and low - temperature refrigerator, 16 groups, 3 per group, uniaxial tensile experiments are carried out. it educed tensile, compression - strain curves of concrete, tensile strength - caring age curves of concrete and compressive strength - caring age curves of concrete
採用液壓試驗機和使用低溫冷凍室，做了20組60個單軸受壓試驗和20組60個單軸受拉試驗，得出了混凝土的受壓和受拉應力?應變曲線、抗壓強度與養護齡期以及抗拉強度與養護齡期的關系曲線。Main factors impact on frozen - damage of concrete are water, temperature and pore structure
影響混凝土凍害的主要因素是水、溫度和孔結構。分享友人