水泥侵 的英文怎麼說
中文拼音 [shuǐníqīn]
水泥侵
英文
cement contamination-
Soil is the base of agriculture production, the key measure to prevent water and soil loss is to conserve soil, but most soil nutrient is lost with the sediment loss, and serious water and soil loss make the soil thickness degrease, the soil nutrient be deficient and lean, the land quality degrade and the yield of plant decrease, all this results is going to threaten the people ' s transplanting and the agriculture sustainable development, and restrict the economy development of three gorges regions
同時，土壤是農業生產的根本，治理水土流失的關鍵是要保住土壤，而土壤養分絕大部分是隨著泥沙流失的，嚴重的水土流失造成土層淺簿、養分貧瘠，土地質量退化，產量下降，對三峽庫區移民工作和農業可持續發展造成嚴重威脅，制約三峽庫區經濟發展。因此進行三峽庫區坡耕地土壤侵蝕機理研究，探索減輕坡耕地土壤流失的方法措施，具有全局性的重大意義。Through synthetically study, some achievements are made as follows : 1. based on the application of sequence stratigraphy, for the first time the characteristics of sequence stratigraphy in the xicheng concentrated mineralization area are discussed systematically and 13 three graded imperfect sequences of devonian stratum are recognized. the result shows that hydrothermal sedimentary mineralized type and hydrothermal sedimentary - rebuilded mineralized type ore deposits occur in intergrade between two sequence, as well as occur in intergrade between highstand systems tract and transgressive systems tract
通過對該區礦床成礦作用的綜合分析研究，取得了如下一些成果和認識： 1 ）應用層序地層學理論，首次系統論述了該區泥盆系層序地層的特徵，識別出13個不完整的三級層序，並進行了區域對比。層序地層分析發現海底熱水沉積型礦床和海底熱水沉積-改造型礦床的賦礦部位是兩個層序的過渡部位，既高水位體系域向海侵體系域過渡。There is correspondence in evaluating sulfate resistance of cement paste by three test methods such as rapid boiling, gypsum mixing and wet - dry test. high strength grade cement can meliorate property of sulfate resistance
外摻石膏法、干濕交替法以及快速沸煮法三種實驗方法對評價水泥砂漿的抗硫酸鹽侵蝕性能有較好的一致性；高標號水泥品種對抗硫酸鹽侵蝕性能有很好的改善作用。Rapid test for sulphate resistance of cement
水泥抗硫酸鹽侵蝕快速試驗方法Through the analyses of characteristics of gully thalweg and soil erosion in upland and gully land, sediment sources in small watershed, sediment yield relationship between upland and gully and ecological functions of vegetation corridor, it is considered that vegetation corridor combined with land preparation measures may block runoff and sediment from upland and reduce the amount of soil erosion in a watershed by 54. 5 % ~ 77. 0 %
摘要在分析黃土高原地區的溝沿線、溝沿線上下溝間地和溝谷地土壤侵蝕特徵、小流域泥沙來源、坡溝侵蝕產沙關系的基礎上，結合廊道的生態功能和以往的研究結果，認為在溝沿線的上部建立草灌與整地工程措施相結合的植物廊道，來攔蓄阻截溝間地的來水來沙，可使流域的土壤侵蝕量減少54 . 5 % ~ 77 . 0 % 。Since 1976 it has been made great achievements which has conducted water more than 100 billion m3 and has been an important project of heilongjiang province. but recently the channel has been seriously freezing - melting eroded and sand of cliff edge has been deposited along the channel, which resulted to highten the channel bottom, increase width of the channel and reduce horse road. what all above have affected to apply safely channel so it is necessary to repair comprehensive
自1976年建成以來，已累計引水100多億立方米，取得了巨大的經濟效益，成為黑龍江省西部關繫到國計民生的重點工程，但近年來渠道破壞嚴重，凍融侵蝕強烈，邊壁剝蝕下來的泥沙經渠道內水流搬運沿程發生淤積，導致渠底抬高，渠寬增加，馬道縮小，已經嚴重影響到渠道的安全運用，必須進行綜合治理。Gully erosion, which is universal on original lands, but also the special forms, for example, hole erosion gravel erosion debris slide and debris flow, which is unusual in loess area, ( 2 ) based on a long - term fixed point experiments in proving ground of the south stackpile, the soil erosion factors have been researched quantitatively, the runoff and erosion affected factors have been made sure and the experiential models of producing water and soil have been taken in newly - constructed stage, early stage and later stage of reclamation
確定南排土場原地貌的水蝕模數為3700 4400t km ~ 2 ? a ；在排土場新造地貌上，擊濺、面蝕、細溝侵蝕、淺溝侵蝕、沉陷侵蝕、砂礫化面蝕、土砂瀉溜和坡面泥石流等水土流失形式出現頻率和發生程度都明顯強于原地貌。 （ 2 ）以南排土場徑流試驗場長期的定位觀測為基礎，對排土場未復墾時期、復墾初期、復墾後期的土壤水蝕影響因子進行定量研究，確定了徑流和土壤水蝕的主要影響因子及其臨界值，建立了產流產沙的經驗模型。With the very low water to cement ratio, rpc has ultra - high strength high ductility and low permeability. in this paper, the compressive strength of rpc can reach to a high point with the number approximately 135mpa. as illustrated from the study results, we can approve some fundamental conclusions : there are big effects on rpc with deferent kinds and properties of raw materials and deferent curing conditions ; stress - strain curve shows the process of destroy with rpc samples ; x - ray diffraction analysis indicates that heat treatment at temperatures 90 accelerate the hydration of rpc sharply, therefore, mechanical and microstructural properties of rpc are highly dependent on heat treatment ; it is believed that rpc materials have excellent resistance to chloride permeability ; during the heat treatment, the shrinkage of rpc developed quickly because of chemical reactions ; the rpc with slag mostly has the advantage of rpc without slag about resistance to solutions corrosion
研究結果表明：通過對rpc各組分摻量變化的研究，可以找到rpc的最優配合比；試件成型后的熱養護制度對rpc的性能影響巨大； rpc的抗壓應力?應變曲線可以反映出試件受破壞時微裂紋的擴展情況，剛纖維的摻入可以大幅改善rpc的韌性； rpc在成型后存在較大的收縮，而其中的化學收縮要遠遠大於乾燥收縮； rpc具有很強的抗氯離子滲透性能，漿體的密實度很高；通過x射線衍射實驗，可以發現rpc的膠凝體中ch晶體已經幾乎不存在，膠凝體主要由c - s - h凝膠和未水化水泥顆粒組成；在抗溶液侵蝕的實驗中，摻礦渣rpc的抗溶液侵蝕性能在絕大多數情況下要好於不摻礦渣試件，酸、堿溶液和浙江工業大學碩士學位論文摘要一些鹽溶液都會對rpc的結構產生侵蝕作用，但是機理各有不同。Sulfate attack on cement mortar containing limestone powder at lower temperature
含石灰石粉水泥砂漿在低溫環境中的硫酸鹽侵蝕Effects and mechanisms of mineral admixtures on sulfate attack of cement mortars
礦物摻合料對水泥砂漿硫酸鹽侵蝕的影響及機理With the addition of the mineral additives, the structure of the cement paste can be improved and the resistance of sulfate attacks can be advanced
摻入摻和料可以改善水泥漿體的結構，明顯提高混凝土的抗硫酸鹽侵蝕能力。The paper analyzes and summarizes the following laws of distinctive sediment yield produced in storm floods of the region based on predecessors ' study : storm is the main dynamic force of erosive sediment yield and storm, flood and sediment exist an inevitable relation ; the flood occurring time is concentrated with high peaks and huge volume, suddenly rising and suddenly falling and has decisive influence to the formation of a major flood peak in the middle yellow river ; the main reasons of concentrated coarse sediment of the river is severe erosive sediment yield, strong sediment transporting capacity and high sediment concentration ; the important influence of frequent or continued storm floods happened in he - long reach especially in coarse sediment concentrated region to the sediment transport of the yellow river and ; along with the increase of harnessing, regional flood trend is becoming smaller but the variation of sediment quantity is not obvious and the reaction of peak discharge and flood runoff of majority tributaries are not sensitive, showing that a general and normal engineering works can not effectively control regional major floods especially the sediment of an extraordinary flood
摘要在前人研究的基礎上分析總結了該區特有的暴雨洪水產沙規律：暴雨是侵蝕產沙的主要動力，暴雨、洪水、泥沙之間存在著必然的關系；洪水發生時間集中，峰高量大，暴漲暴落，對黃河中游大洪峰的形成具有決定性影響；侵蝕產沙強烈而粗泥沙集中，輸沙能力強，洪水含沙量高，是黃河粗泥沙的集中來源地；河龍區間特別是粗泥沙集中來源區頻繁或連續的暴雨洪水對黃河輸沙有重要影響；隨著治理水平的提高，區域洪水有減小趨勢，但泥沙量變化不明顯，大部分支流的洪峰流量、洪水含水量反應不敏感，說明一般規模和水平的治理工程還不能有效控制區域大洪水特別是特大洪水的泥沙。So studying water erosion and probing the laws of sediment yield, have significant production practice meaning to the prevention and cure for soil erosion and all kinds of silt disaster
因此開展水力侵蝕的研究，探索水力侵蝕產沙規律，對于土壤侵蝕的防治和各類泥沙災害的治理，具有極大的生產實踐意義。These produels are produced by the techniques same with chemical bonded non - sintered bricks with semi - silica raw materials, they have high strength, good heat insulating and alkali resistant properties, they are mainly applied to the zones of large - sized cement rotary kilns which are croded badly by alkali, for example, the input zone, preheater, three - windtunnel, and decomposing zone
本產品採用半硅質原料，以化學結合不燒工藝生產而成，它具有強度高、隔熱效果好、抗堿侵蝕能力強的特性，主要用於大型水泥回轉窯筒入料區段、預熱器、三次風管和分解帶等堿侵蝕嚴重的部位。Sulphate resistance test for cement
水泥抗硫酸鹽侵蝕試驗方法The intermediate magnesium - clad slag guard wire is produced through advanced process of non - cement pouring featuring corrosion resistance, high temperature resistance, good heating stability and long service life etc
中間包鎂質檔渣堰採用無水泥澆注的先進工藝，具有耐侵蝕、耐高溫、熱震穩定性好、使用壽命長等特點。Rapid test for sulphate resistance of
水泥抗硫酸鹽侵蝕快速試驗方法In this paper, the performances of macroscopic physical mechanics, durability, and microstructure are analyzed and studied. the results of macroscopic properties indicate that the workability and relevant physical mechanics are matched best with the scientific introduction of auxiliary cementitious materials. at the same time, the compatibility between stained materials and cement - basic materials is improved, as well as the resistant abilities of the ions transference and environmental corrosive damages
宏觀性能測試結果表明，科學合理的引入輔助膠凝材料在一定程度上使hpch材料的工作性及相應物理力學性能得以最佳匹配，同時改善了著色物質與水泥基材料的相容性，增強了hpch材料對離子遷移的阻礙能力及對環境侵蝕破壞的抵抗能力。The cement exposed to water hydrates immediately in the cementitious materials of concrete, and produces ca ( oh ) 2 with the prolonging of hydration time, which is the important cause to reduction of corrosion resistance of concrete
混凝土膠凝材料中的水泥遇水即發生水化，隨著水化齡期的延長生成大量的ca （ oh ） _ 2 ，這是造成混凝土抗侵蝕性能降低的重要原因。3. the results of research on durability of hbc concrete including resistance of freeze - thaw, permeability, carbonation, corrosion as well as shrinkage and sub - microstructure structure exhibit hbc concrete has good properties of freeze - thaw resistance, permeability resistance, carbonation resistance, corrosion resistance and less shrinkage compared with opc concrete
通過對高貝利特水泥高性能混凝土的一系列耐久性能包括抗凍、抗滲、抗碳化、抗侵蝕、干縮以及其各齡期的亞微結構等的研究，得出：高貝利特水泥高性能混凝土具有良好的抗凍、抗滲、抗碳化及抗侵蝕性能並且干縮較小。分享友人