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耐久性

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Also the concrete structures service life may be threatened by the negative pressure occurred when waves separate from the subface of the structures.

另外当波浪离开上部结构底面时产生的负压力作用对混凝土结构的耐久性也是一个很大的威胁。

A kind of superplasticizer of sulfamic acid series is a new superplasticizer with good prospect, which can provide concrete high flowability good durability and low slump loss.

氨基磺酸系高效减水剂具有对水泥粒子的高度分散性,减水率高,混凝土的耐久性好,并具有控制坍落度损失的功能,是很有发展前途的一种新型高效减水剂。

Effects of temperatures on thaumasite formation were investigated.

硫酸盐侵蚀是影响混凝土耐久性的重要因素之一。

In tested sample of the converter the using of higher rpm was inadmissible because of unsufficient mechanical durability of the magnetic system, which was built from separate pieces.

在测试的样品转换器的使用较高的转速是不能接受的,因为unsufficient机械耐久性的磁系统,这是由单独的内置件。

The adding of mineral admixtures and high performance water reducer is the key factor of preparing self-compacting concrete, especially high strength and extra strength self-compacting concrete. Mineral admixtures have unsuperseded advantages in improving the workability and durability of self-compacting concrete.

加入优质矿物掺合料及高效减水剂是配制免振捣高性能混凝土特别是高强超高强免振捣混凝土的技术关键所在,由于优质矿物掺合料的&微集料效应&、&火山灰效应&、&滚珠效应&,使其在改善免振捣混凝土工作性,提高免振捣混凝土耐久性方面发挥了不可替代的作用。

The paper discusses the design thoughts about the mixing proportion of big volumed concrete. The causes of concrete's heat of hydration and contraction are analyzed even the corresponding settlement methods are offered and compartment analysis is made.

临汾污水处理厂是我公司承建的一大型污水处理工程,它不但工程量大(80 0 0m3 以上),而且其中大部分为大体积混凝土(最厚处达 3 。3m),抗渗要求P6,同时多为暴露工程(要求混凝土具有高耐久性)。

After happening in a certain degree, the structure damage will have a bad effect on the load capacity and durability greatly or even cause the serious accidents. Thus, it caused not only the significant casualties and economic losses but also a very bad social influence.

水工结构在实际运营中,由于设计、施工等先天缺陷或者使用载荷超出设计以及遭受强大的突加外在荷载的作用会使结构物出现不同程度的损伤,结构发生损伤以后将严重影响结构的承载力及耐久性,甚至会发生严重的工程事故,不仅造成重大的人员伤亡和经济损失,而且还会产生极坏的社会影响。

The mathematic model and the neural networks between strength after acidifying and acidified depth can reflect the corrosion condition of mortar and concrete, which have certain referential value for estimating the acidifying resistance durability of concrete in southwest China.

本文最后所得到的腐蚀后的强度和酸化深度的数学模型和神经网络,可以较好的反映混凝土受酸雨腐蚀的变化情况,对我国南方酸雨区的混凝土腐蚀的耐久性和经济评估有一定参考价值。

From the bending strength for 12 years, it can be found that the polymer-mortar possessed excellent binding and durability. Hence, the polymer-mortar can be widely used as agglutinating of old-fresh concrete, stick ing steep plate and surface whitewashing at structure reinforced.

根据12年龄期的粘结抗弯强度试验结果,聚醋酸乙烯砂浆不但具有优良的粘结性能,还具有良好的耐久性,可广泛用于新老混凝土的粘结、修补及结构加固中的钢板粘贴和表面粉刷等。

An introduction is given to elastic sleepers,a major technical reform of high-speed ballasted track.

介绍今后将成为高速有碴轨道改革重大技术动向的弹性轨枕的应用情况,尤其是日本的弹性轨枕,着重介绍该轨枕的断面形状、防振橡胶层及其耐久性试验、道床横向阻力试验与试铺效果。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。