1)Alkali content碱含量
1.When the alkali contents in the concrete admixture are determined and the samples are determined by the pre-ignition or the standard addition method,the disadvantages from the matrix can be eliminated and the possible fluctuating results from the reagent shortage in treating the common samples or the contamination and loss of the test liquid in operation can be avoided.测定混凝土外加剂中的碱含量时,对试样进行灼烧预处理或采用标准加入法进行测定,可消除试样的基体影响,同时也可以避免一般的试样处理过程中的试剂空白以及操作过程中试液的污染与损失可能造成的结果波动。
2.There are three aspects in which the consistency property of cement and admixture is affected,including,first,the cement s mineral composition,state and admixed amount of gypsum functioning as a set-controlling agent,alkali content,fineness of grinding,cement s freshness and temperature and other factors;se.影响水泥与外加剂相容性的因素包括3个方面:一是水泥的矿物成分、调凝剂石膏的状态和掺量、碱含量、粉磨细度、水泥的新鲜程度和温度等;二是外加剂中高效减水剂的化学性质、分子量、交联度、磺化程度和平衡离子度,缓凝剂的种类与用量等;三是温度、时间、湿度等环境条件。
英文短句/例句
1.Standard ofr maximum alkali content in concrete混凝土碱含量限值标准
2.Simultaneous Quantitative Analysis of Five Alkaloids in Rhizoma of Coptis chinensis by Multi-Components Assay by Single Marker一测多评法测定黄连中小檗碱、巴马汀、黄连碱、表小檗碱、药根碱含量
3.Relationship of nicotine conversion rate with individual alkaloid contents and Anat/Nnic in burley tobacco白肋烟烟碱转化率与生物碱含量及新烟草碱/降烟碱值的关系
4.Determination of capsaicin in rotenone-capsaicin suspension by nitrogen determination method定氮法测定鱼藤酮辣椒碱悬浮剂中辣椒碱含量
5.OBJECTIVE A HPLC method was established for the determination for berberine hydrochloric of Qutang capsule.目的建立测定盐酸小檗碱含量的方法。
6.The content of nornicotine is higher after flue-curing than before flue-curing.湿度对烟碱含量影响无明显的规律性。
7.Experimental Studies on Determination of Berber-ine Contents in the Xianglian Tablet香连片中小檗碱含量测定的实验研究
8.A comparative study on alkaloid in roots of Smilax china L and Smilax glabra Roxb;菝葜和土茯苓生物碱含量的比较研究
9.Determination of assay for nicotine in nicotine tablets by HPLC;RP-HPLC法测定烟碱含片中烟碱的含量
10.RP-HPLC determination of lehmannine in total alkaloids of Sophora alopecuroidesRP-HPLC测定苦豆子总碱中莱曼碱的含量
11.Containing a base, especially in excess of acid.含碱的，尤指超过酸的含量
12.The alkali content in the composition of magmatic rock was more, iron content was less.岩浆岩成分中碱质含量较高,铁质含量较低。
13.Extraction Identification,and Content Determination of Matrine and Oxymatrine from Sophora Flavescens Ait苦参碱和氧化苦参碱的提取 鉴定和含量测定
14.Extraction and Determination of Rhynchophylline and Isorhynchophylline in Ramulus Uncariae cum Uncis钩藤中钩藤碱、异钩藤碱的提取与含量测定
15.Determination of Matrine and Oxymatrine in Xuanjing Granules by HPLCHPLC法测定癣净颗粒中苦参碱、氧化苦参碱的含量
16.Simultaneous Determination of Mesaconitine,Aconitine and Hypaconitine in Blood and Liver Speciman by HPLCHPLC同时测定生物样品中新乌头碱、乌头碱、次乌头碱的含量
17.Determination of Theobromine in Compound Theophylline and Ephedrine Tablet by HPLC高效液相色谱法测定复方茶碱麻黄碱片中可可碱的含量
18.OBJECTIVE To determine the content of piperine in weibishu capsule by RP-HPLC.目的测定胃必舒胶囊中胡椒碱的含量。
相关短句/例句
content of alkali碱含量
1.Study on decreasing content of alkali in red mud by chlorination magnesium;利用氯化镁降低赤泥中碱含量的研究
2.First of all, the content of alkali of.分别论述了碱-集料反应的预防与鉴别方法，碱-集料反应的预防，可采用控制水泥碱含量、控制混凝土碱含量在3kg以内、控制混凝土湿度、掺混合材(如：粉煤灰等)、使用化学外加剂、使用非活性集料等方法。
3)nicotine content烟碱含量
1.Predicting leaf nicotine content of flue-cured tobacco using hyperspectral reflectance;利用光谱反射率预测烤烟叶片烟碱含量
2.Genetic analysis of nicotine content in DH burley tobacco population利用DH群体分析白肋烟烟碱含量的遗传规律
3.The field trials were done to study on the effects of nitrogen amount on the yield and nicotine content of sun-cured tobacco.通过田间试验,研究了不同施氮量对晒烟烟叶产量和烟碱含量的影响。
4)alkali content含碱量
1.And from controlling alkali content, aggregate, admixture and waterproof treatment the prevention measures for alkali aggregate reaction are discussed to raise the durability of concrete.介绍了混凝土中碱骨料反应的类型、机理和危害 ,从控制水泥和混凝土含碱量对骨料的选择使用、掺和材料、防水处理几方面论述了预防碱骨料反应的方法 ,提高了混凝土工程的耐久
2.The effects of alkali content of cement on the fluidity,fluidity loss and setting time of paste added with or without sulphonated naphthalene based superplasticizers(with low or high content of Na 2SO 4)are investigated through experiments.通过试验研究了在不掺加减水剂、掺加高浓型萘系高效减水剂以及掺加普通型萘系高效减水剂三种情况下 ,水泥含碱量对浆体流动性、流动性保持性和凝结时间的影响。
5)total alkali content碱总含量
6)Lower alrali content低碱含量
延伸阅读
碱含量碱含量就是水泥中碱物质的含量，用na2o合计当量表达。即碱量=na2o+0.658k2o。碱含量主要从水泥生产原材料带入。尤其是粘土中带入。碱含量高有可能产生碱-骨料反应。混凝土碱骨料反应是指来自水泥、外加剂、环境中的碱在水化过程中析出naoh和koh与骨料(指砂、石)中活性sio2相互作用，形成碱的硅酸盐凝胶体，致使混凝土发生体积膨胀呈蛛网状龟裂，导致工程结构破坏。发生碱骨料反应条件：骨料中具有碱活性物质；混凝土中具有足够量的碱(主要来自水泥)，碱含量>3.0kg/m3；工程处在一定湿度条件下。以上三项条件同时存在时，才会发生混凝土碱骨料反应。否则，不发生碱骨料反应。改善措施(使用对象)降低水泥总量，使用矿渣粉代替，可有效降低混凝土中总碱量。选择低硫酸钠减水剂。市场主流高效奈系减水剂中，na2(so)4含量在2~20%间不等。对混凝土总碱量影响不容忽视。使用非活性骨料。非长期受湿部分不必强调低碱要求
