查询词典 Portland cement

Experiment studied the possibility of substituting Portland cement for alumina cement to make low cement castable refactory. The results indicated that Portland cement may definitely substitute the alumina cement to make low cement castable with good performance, within the scope of low cement content of the modern low cement castable system.

试验研究了硅酸盐水泥替代矾土水泥制造低水泥耐火浇注料的可能性，结果表明在低水泥掺量的现代低水泥耐火浇注料体系中，硅酸盐水泥完全可以替代矾土水泥配制性能良好的低水泥耐火浇注料。

They used limestone of different quality and large-fluctuant-range waste stone in proportion and substituted a part of clay with clay stone to produce cement. And the physical performance of the produced Portland cement was improved greatly-28 d strength increased from 50.4MPa to 54.5MPa, and output of the rotary kiln increased. Moreover, the company also tried to use green shale as admixture to produce compound cement and successfully produced compound Portland cement with a little low early strength and a little higher 28d strength than slag Portland cement. And the cement cost decreased 19.59 yuan per ton.

将CaO含量波动范围较宽的废石与不同品位石灰石按比例搭配使用，将其粘土质特性的废石替代部分粘土生产；而且生产的硅酸盐水泥熟料物理性能有较大提高，28d强度由原来的50.4 MPa提高到54.5 MPa，窑产量也有一定的提高；此外，该公司还进行了将绿色页岩作混合材生产复合水泥的生产探索，成功生产出了早期强度略低，但28d强度略高于矿渣硅酸盐水泥的复合硅酸盐水泥，且使水泥生产成本降低19.59元/t。

Below 300 300 to 1200 Ordinary Portland or Portland blastfurnace Ordinary Portland or Portland blastfurnace Sulphate resisting Supersulphated Sulphate resisting or Supersulphated High alumina Sulphate resisting or Supersulphated High alumina Sulphate resisting or Supersulphated with adequate protective coating High alumina Minimum cement content (kg m-3) Type of cement Maximum size of aggregate 37.5 240 290 240 270 290 290 330 330 330 330 19.0 280 330 280 310 330 330 370 340 370 370 9.5 330 380 330 360 380 380 420 410 420 420 0.55 0.50 0.55 0.50 0.50 0.45 0.45 0.40 0.45 0.35 Maximum water-cement ratio 0.5 to 1.0 1.0 to 2.0 1200 to 2500 2500 to 5000 Over 2.0 Over 5000 Wear

这些气 穴通常由具有格外高能量的水蒸气所填充，与混凝土表面的反复接触导致形成凹陷和孔洞，即气蚀。既然高质混凝土也不能抵抗这种劣化，因此最好的补救是通过制造平滑水流来消除气蚀。在所有必须的地方，关键的面上衬以高抗气蚀性的材料。通常，混凝土抗腐蚀和磨损的能力随强度增加而提高。采用硬韧的集料可改善混凝土的抗磨损性。

Watering concrete curing time, the introduction of Portland cement, ordinary portland cement or slag cement concrete mixing shall not be less than 7d; retardation of mixed type with admixtures, the impermeability requirements, or ash cement, fly ash cement concrete mixing shall be not less than 14d; of mixing using alumina cement concrete not less than 3d.

混凝土的浇水养护时间，对采用硅酸盐水泥、普通硅酸盐水泥或矿渣硅酸盐水泥拌制的混凝土不得少于7d；对掺用缓凝型外加剂、有抗渗性要求、或用火山灰水泥、粉煤灰水泥拌制的混凝土不得少于14d；对采用矾土水泥拌制的混凝土不少于3d。

It is also revealed that the refractoriness of Portland cement and alumina cement are actually at the identical level, and refractoriness of castable with low cement content of Portland cement, substitution of alumina cement, will not cause worsening of refractoriness.

研究还发现硅酸盐水泥耐火度与矾土水泥耐火度实为同一水平，低水泥耐火浇注料中硅酸盐水泥替代矾土水泥不会造成浇注料耐火度的恶化。

The slump and the time of slump are tested through the method of slump test, and the properties of concrete are calculated and analyzed. The study denotes that for C20 grade concrete, the value of the shear yield stress σ0 and plastic viscosity η is the smallest when the fly ash contains 20% weight of Portland cement; for C60 strength grade concrete, the value of plastic viscosity is the smallest when fly ash contains 20% weight of Portland cement and the value of the shear yield stress σ0 is the smallest when fly ash contains 30% weight of Portland cement.

利用改良坍落度筒的实验方法对坍落度和坍落时间进行测试，并进行相应的计算与分析，实验结果表明：强度等级为C20的混凝土，粉煤灰掺量为20%时粘度和屈服应力值最低；强度等级为C60混凝土，粉煤灰掺量为20%时，其粘度最低，而屈服应力值在粉煤灰掺量为30%时最低。

Investment project of municipal government of Tongliao Trade: building material industry No: 028 Project name Unique cement producing line Cooperation Mode Joint-venture cooperation individual Sum- mary Products Scheme Scale of Operation Forecasting Scales The need of cement is balanced at present, but the special cement (white cement, cement for dam, cement for road) of it is hard-to-get, the condition of it is advanced, the resources of the limestone for producing cement is one billion in Kulun County, and the calcium percentage is over 53%. The resource for producing cement of it will be one hundred million tons in the zone of project. The traffic and electricity power system for the project is plenty.

通辽市人民政府招商引资项目行业：建材 No：028 项目名称特制水泥生产合作方式合资、合作、独资均可项目概述产品方案经营规模销售预测目前，水泥市场呈供求平衡态势，但特种水泥（白水泥、大坝水泥、道路水泥）供应偏紧，而且对原材料的要求极高，库伦旗境内用于生产水泥的石灰石储量达10亿吨，CaC含量达53%以上，项目区符合生产特种水泥的石灰石储量达亿吨以上，项目区内交通便利，电力供应充足。

To explore the hydration process of Portland cement-fly ash system, the reaction degree of fly ash and Portland cement,non-evaporable water content,amount of hydration products,porosity and compressive strength of pure cement pastes and cement-fly ash pastes were studied at various curing ages,water-to-binder ratio,and fly ash replacement percentages.

为考察粉煤灰对水泥水化进程的影响，系统研究了水泥粉煤灰浆体在不同养护龄期、水胶比、粉煤灰掺量下水泥和粉煤灰反应程度、非蒸发水数量、水化产物数量、孔结构和浆体力学性能。

Compatibility of high belite cement, Portland cement and ordinary Portland cement with superplasticizer and effect of mineral admixtures on the compatibility of high belite cement have been studied with the test of the workability of concrete as reaffirmation.

结果表明：高贝利特水泥具有优异的与高效减水剂相容性，具备优良的施工性能。

The grindability of cement clinker was better than ordinary Portland cement, for example, on the same condition it took the high alite content Portland cement clinker 4.5min to grind to a specific surface area of 320m2/kg, while the o...

同时这种水泥熟料的易磨性优于普通硅酸盐水泥熟料：在相同条件下，磨细到比表面积320m2/kg时，这种熟料需要4.5min，而普通硅酸盐水泥熟料则需要8.0min。同时对该熟料进行了岩相检验分析。

His female bullfighter Lydia gradually Health love, but she was in a vegetative state after the Bulls Zhuangcheng away from her, just because Lydia's ex-boyfriend showed more affectionate than he is like love.

他对女斗牛士莉迪亚渐生爱意，却在她被公牛撞成植物人后离她而去，仅仅因为莉迪亚的前男友表现出好似比他更深情的爱。

I know of none which are not easy to answer, but what I am trying to do now is only by a series of hints to throw some light on the narrow path of legal doctrine, and upon two pitfalls which, as it seems to me, lie perilously near to it.

我不认为有什么难以回答的问题，但我现在要做的仅仅是通过一系列线索，来给法律理论的狭窄路径以及在我看来离它近得危险的两个陷阱提供一些启示。