查询词典 Portland

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。

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。

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。

I have friends who are moving from the center of Portland to the boondocks of Portland so they can afford for one of them to take be a stay-at-home parent.

我也有夫妻朋友，为了能让一个人停止工作成为全职家庭主妇而从Portland中心搬到偏僻地区。

I went out with one of my friend to Portland downtown to do the count down. However, there was no official count down at the Pioneer Square . So, we went to have dinner at the Portland City Grill and then check out one of the club at Burnside.

昨晚越南姐姐叫了我到市中心做倒数﹐可惜 Pioneer Square没有正式的倒数活动﹐所以在 Portland City Grill 吃晚饭后﹐便转到club看看。

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。

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。

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 European Prestandard prEN 197-1 identifies two types of Portland limestone cement containing 6–20% limestone and 21–35% limestone, respectively. It is expected that the future world production and use of Portland limestone cement will be significantly extended.

欧洲prestandard产前197-1列出两种含有6-20%波特兰水泥灰岩、石灰石石灰石21-35%，分别预计未来世界石灰石硅酸盐水泥的生产和使用将大大延长。

Portland cement was used as cementations materials in developing foamed concrete, and some high alumina cement and lithium salt were added into Portland cement to adjust the time of setting in order to match the stable time of foam.

以普通硅酸盐水泥作基材制备泡沫混凝土，为了与泡沫的稳定时间相匹配，研究采用在普通水泥中掺入一定量的高铝水泥和碳酸锂来调整水泥浆的凝结时间。

Oslash; Must sign a waiver absolving the programme Last1Standing and Hunan TV from any responsibility for physical harm to the competitor as a result of any aspect of their participation in the programme.

Oslash；必须签署一份放弃书声明如果参赛者由于参加节目受到身体上的伤害，放弃追究Last1Standing节目和湖南卫视的责任。

Current, the emission of software channel is turning to Internet gradually, a lot of software were to become free application more, but after killing poisonous software freely to appear suddenly, traditional manufacturer people think software is to be able to become a service however, but the service is not free certainly however.

现在，软件的发行渠道正逐渐转向互联网，很多软件更是变成了免费的应用，但在免费杀毒软件忽然出现之后，传统厂商们却认为软件是可以变成服务的，但服务却不一定是免费的。