The bridge structure suffered the moisture, frog and load attack successively in natural state, this results in concrete carbonization, reinforcing steel bar erosion, the surfer desquamate, the cross section dimension decrease, so the mechanics performance worsen, the bridge bearing capacity decreases.

在自然條件下热热无码，橋梁結(jié)構(gòu)由于受到大氣、水霧及外載的不斷作用欧美特黄在线视频，引起混凝土碳化永久免费的毛片视频网站、鋼筋脫鈍銹蝕、構(gòu)件表面剝落换妻视频在线观看、截面尺寸減小亚洲欧美日韩精品视频，從而使混凝土結(jié)構(gòu)或構(gòu)件的力學(xué)性能惡化，使用性能降低a片黄色片一级片欧美，橋梁承載能力減小欧美在线精品视频a美国网站，嚴(yán)重的甚至引起人民生命財產(chǎn)的重大損失。

The results show that the distillate temperature of DLLA is lowed by the addition of diluent ethylene glycol, and the carbonization phenomenon can be avoided, which increases the yield of DLLA from 36.8% to 51.3%.

研究結(jié)果表明亚洲视频在线观看视频，在反應(yīng)體系中加入乙二醇作為稀釋劑WWW.午夜一级片.COM，能降低DLLA的餾出溫度，避免了DLLA在蒸餾過程中產(chǎn)生炭化現(xiàn)象色网国产，并使DLLA的平均產(chǎn)率由36.8%提高至51.3%jizzjizz18。

The affections on the yield of DLLA caused by catalyst, temperature and time etc. were studied. By using ethylene glycol as diluent, the distillate temperature of DLLA was lowed and the carbonization phenomenon could be avoided, which caused the yield of DLLA increasing from 36.8% to 51.3%. The molecular weight of PDLLA prepared by this method could reach 184,000. DLLA and PDLLA was characterized and analyzed by DSC, XRD and IR.The key of direct method to synthesize PDLLA is the exclusion of H2O from reaction system.

丙交酯開環(huán)聚合制備PDLLA的關(guān)鍵在于中間體D，L-丙交酯的制備亚洲网站在线播放，研究了催化劑一级A片在线看无码免费、反應(yīng)溫度、反應(yīng)時間等因素對DLLA產(chǎn)率的影響www.saomz02.com，通過在反應(yīng)體系中加入稀釋劑乙二醇欧美阿视频99在，DLLA的餾出溫度明顯降低，避免了DLLA在蒸餾過程中產(chǎn)生碳化現(xiàn)象www日本com黄色，并使DLLA的平均產(chǎn)率由36.8％提高至51.3％国产自啪女女，制備的PDLLA分子量最大值達(dá)18.4萬。

Using the data dealing method for the saturated solubility, thermodynamic properties of Fe-C-Cr melt were calculated and the temperature dependence of thermodynamic properties also obtained, and the thermodynamic analysis of de-carbonization with blowing oxygen was carried out while medium carbon and low carbon ferrochrome were smelted using high carbon ferrochrome with converter practice.

利用碳飽和溶解度數(shù)據(jù)處理方法国产乱伦窝边操，計算了Fe－C－Cr熔體的熱力學(xué)性質(zhì)久久99久久99精品欧美男男，得到Cr對C的話度相互作用系數(shù)與溫度的關(guān)系式，并分析了高碳鉻鐵轉(zhuǎn)爐法吹煉中低碳鉻鐵時吹氧脫碳的熱力學(xué)行為美国潢色片AAAwWwA。

The high performance concrete is applied in engineering field increasingly for its high fluidness , high intensity and good durability carbonization capability .

高性能混凝土以其高流動性性爽交免费视频，高強(qiáng)度和良好的耐久性在實際工程中日益得到廣泛應(yīng)用。

To study the sweetening process of diasporic bauxite,Al3 obtained from the direct carbonization of unrefined sintering solution was used as the additive and its performance was compared with that of the conventionally used gibbsite .

分別以燒結(jié)法粗液直接進(jìn)行深度碳分所得到粗氫氧化鋁和工業(yè)上常用的三水鋁石礦作為添加劑国产精品视频一区二区首页，進(jìn)行了一水硬鋁石礦增溶溶出過程的對比研究欧美老熟妇A乱子视频在线观看，主要考察了增溶溫度、添加劑添加量和增溶時間等因素對溶出效果的影響亚洲口咬一级视频，同時對增溶溶出礦漿與常規(guī)拜耳法溶出礦漿的沉降性能進(jìn)行了對比研究久久久久久久综合日本亚洲欧美。

In an identical plant, the graphitization and carbonization of both fiber surface and inside are carried out simultaneously.

本發(fā)明具有在一套設(shè)備內(nèi)同時實現(xiàn)石墨化和纖維表面及內(nèi)部的滲碳，工藝簡單欧美快射视频合集，得到高強(qiáng)度和高模量的石墨化碳纖維的優(yōu)點综合在线免费观看三级视频一区二区。

With increasing carbonization temperature, the (002) interlunar spacing decreased from 0.3895 nm to 0.3530 nm. However, the crystallite sizes Lc and La increased in different degrees.

隨著炭化溫度升高，d002晶面間距由0.3895 nm減小至0.3530 nm，而微晶尺寸Lc和La有不同程度增加亚洲群体性爱视频。

It was discussed that the technique of carbonization using limekiln gas and water glass.

探討了利用工業(yè)廢棄物石灰窯氣和水玻璃人人干,人人摸人人草，采用碳化法制備白炭黑的工藝過程。

Using limekiln gas which was exhausted during theprocess of producing calcium carbide to reaction with water glass, did single-factor experiments and discussed the effect of factors on carbonization process, ratio of production and performance of product ,such as temperature and time of reaction, the density of raw material and carbon dioxide etc.

利用電石生產(chǎn)排放的含二氧化碳的廢氣—石灰窯氣和水玻璃進(jìn)行碳化反應(yīng)欧美裸体一级视频，進(jìn)行了單因素試驗91在线九色，探討反應(yīng)溫度、反應(yīng)時間亚洲无视频区、原料配比及二氧化碳濃度等因素對碳化過程好爽好大好紧别拔出来视频、產(chǎn)率及產(chǎn)品性能的影響。