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长期耐久性
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  long term durability
     This paper elucidates the alkalinity of the low pH value cement,which requires a pH value less than 10 7 to ensure long term durability of GRC products.
     阐明了用于玻璃纤维增强水泥(GRC)制品的水泥品种的碱度,其pH值应小于10.7,方可保持GRC制品的长期耐久性
短句来源
     Basic Mechanics and Long Term Durability of Concrete Mixed with MgO
     外掺MgO混凝土的基本力学与长期耐久性
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     How to resist the composite effect from various damages and maintain the long term durability of the concrete is then a key technique for the projects concerned.
     如何抵制各种破坏因素的复合作用,保持混凝土结构的长期耐久性是工程中的关键技术。
短句来源
     In the paper introduced are the characteristics of concrete mixed with MgO microexpensional agent,including mechanics,heat,fast deformation,deformation with time,long term durability and so on. The effect of fly ash and MgO on the above characteristics is discussed.
     对外掺MgO微膨胀混凝土的力学强度、弹性模量、抗拉、干缩、徐变变形 ,抗冻、抗渗、抗侵蚀、抗冲磨、抗碳化等各项基本力学与长期耐久性能以及热学性能进行了全面系统研究 ,并探索既掺粉煤灰又掺MgO对其各项性能的影响 .
短句来源
     The consistency, flow behavior and free fluid content of the fresh cement paste with different water/cement ratio and the compressive strength and long term durability of the hardened paste were tested under corresponding temperature. Compared with the performance of the same type of its kinds from home and abroad, the special micro- fine well cement was proved to be an excellent leakage- stopping material for oilwell repair.
     通过对该水泥在相应的温度压力下,不同水灰比的水泥浆的稠化性、流变性、游离液含量和水泥石的抗压强度及长期耐久性的试验,并与国内外同类产品进行性能对比,表明该水泥是目前性能较为优秀的堵水材料。
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  long durability
     For a modern structure with the requirement of long durability, the technology improvement and quality control system are interdependent.
     对于有长期耐久性要求的现代工程结构来说,技术的改进和质量保证体系是密不可分的。
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     The result show that the C50 HPC with 24 percentage grade I fly ash have good workability, mechanical and long durability. Specialy, the concrete have low shrink and creep, those are benificial to the pretressed concrete in the bridge construchion
     试验结果表明 ,掺 2 4%Ⅰ级粉煤灰配制的C5 0高性能粉煤灰混凝土具有良好的工作性、力学性能和长期耐久性 ,特别是具有较小的收缩和徐变变形 ,这对桥用预应力混凝土十分有利
短句来源
     Through the Fu-men Xinhe extra-large bridge engineering of Jie-Fu-Bang expressway in Anhui province,the mix design,the workability of mixture,the mechanical performance and the long durability of C50 high-performance concrete with fly ash was studied By mixing some amount of grade I fly ash into concrete,not only the workability and mechanical performance,but also the durability of concrete was improved greatly
     结合安徽界阜蚌高速公路阜蒙新河特大桥工程 ,研究C5 0高性能粉煤灰混凝土制备、拌和物性能、力学性能和长期耐久性。 在混凝土中掺入一定量的Ⅰ级粉煤灰 ,不但能改善混凝土的工作性 ,提高混凝土力学性能 ,而且可改善混凝土的长期性能和耐久性
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  “长期耐久性”译为未确定词的双语例句
     With an introduction of the producing method o f C50P10 shield tunnel segment concret and C20P6 spraying concret used in Nanjing metro line,this paper holds that C50P10 segment concret,mixed with 20%~25% Gr ade Ⅰ fly ash,shall possesse fine working capability, mechanical capability and extended durability.
     介绍南京地铁1号线C50P10盾构管片混凝土、C20P6喷射混凝土的配制。 掺20%~25%的Ⅰ级粉煤灰配制的C50P10管片混凝土具有良好的工作性能、力学性能和长期耐久性能。
短句来源
     Experimental Research on Durability of High Performance Concrete for Bridge
     桥用高性能混凝土长期耐久性试验研究
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     The performance of High Performance Concrete in Qinghai-Tibet plateau permafrost region(QT-HPC), was investigated in term of physical and mechanical performance, and durability of this type of concrete, which mixed with DZ-1 multi-function admixture in the case of plus-minus changeable temperature of -5℃~20℃ and constant minus temperature of -5℃, and the reasons why the concrete has preeminent long-term performance and durability was analysed.
     通过研究掺加DZ—1型多功能复合外加剂的混凝土在-5℃~20℃正负变温和-5℃恒负温条件下的物理力学性能和长期耐久性能,考察了QT~HPC的性能特点,并通过微观测试手段分析了QT—HPC具备优越长期耐久性能的原因。
短句来源
     In consideration of the severe natural environment conditions along the Qinghai-Tibet Railway, several indexes on concretes durability are introduced to evaluate the physical performance and durability of HPC (High Performance Concrete) for the Bridge and Tunnel Structure of QingTibet Railway.
     针对青藏高原多年冻土区恶劣的自然环境条件特点,分析了青藏铁路桥隧结构混凝土的力学性能和长期耐久性能的具体指标,提出了提高混凝土耐久性的技术措施,介绍了青藏铁路专用DZ型高性能混凝土外加剂的品质指标及其混凝土的物理力学性能和长期耐久性能。 DZ型系列高性能耐久混凝土的主要性能达到如下要求:最低极限灌注气温为-20℃;
短句来源
     Crack, the common problem existing in concrete material, is one of the main reasons which influence the long-term durability of concrete structure.
     裂缝是混凝土材料普遍存在的问题,也是影响混凝土结构长期耐久性的主要原因之一。
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  long term durability
The central issue is how to predict long term durability on the basis of relatively short duration tests.
      
The consequence of this effect is that even relatively small amounts of tannin cause severe undertreatment of the structural wood constituents which in turn badly affects the long term durability of CCA treated timber.
      
Evidently, for samples obeying the master curve, very few data points at high temperatures can be scaled to obtain reasonably accurate estimates on long term durability.
      
The advantage of our technique includes: (1) high success rate in implantation, (2) long term durability, and (3) less technical difficulty.
      
Although, there is still a question regarding the long term durability such as frost resistance and chloride penetration when polypropylene fibres are used.
      
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  long durability
The use of xenogenic matrices initially acellularized and recellularized with autologic endothelial cells and myofibroblasts may help to overcome the lack of vascular and valvular grafts with long durability.
      
Because of their immediate usefulness, long durability and favourable hemodynamic effects, these solutions should be prefered for the immediate therapy of hypovolemia, particularly in emergency cases.
      
An additional remarkable advantage of SPE technology is the exceptional long durability of oxide coated electrodes.
      
This method of the copper electrode pre-treatment provides its long durability, an insignificant decrease in the electrocatalytic activity in time, and the reproducibility of the electrocatalytic hydrogenation of unsaturated organic compounds.
      
Surfaces are treated with Alodine 1200 equivalent to MIL-C 5541E class 3 and blue paint for long durability.
      
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Type Ⅰ low pH value cement has been investigated and produced for making glass fibre reinforced cement(GRC)products. The feature of the cement is that the proportion of its hydrates, i. e. ettringite, hydroalumina gel, C-S-H gel and C(?)H_3 can be adjusted so that the concentration of CaO in the hydrated liquid phase can be less than 20mg/l and less reaction between fibre and paste, the stability of the hydrates and the strength of the paste can be ensured. The accelerated test has shown that the durability...

Type Ⅰ low pH value cement has been investigated and produced for making glass fibre reinforced cement(GRC)products. The feature of the cement is that the proportion of its hydrates, i. e. ettringite, hydroalumina gel, C-S-H gel and C(?)H_3 can be adjusted so that the concentration of CaO in the hydrated liquid phase can be less than 20mg/l and less reaction between fibre and paste, the stability of the hydrates and the strength of the paste can be ensured. The accelerated test has shown that the durability of the alkali glass fibre in low pH value cement paste is at least 20 times much better than that in portland cement paste. The durability of the alkali-resistant glass fibre combined with low pH value cement is optimum.The properties of this cement, especially its stability in atmosphere and the long term durability are described.Different kinds of GRC products, such as pressurized plates, small corrugated tiles and wall panels, using type Ⅰ low pH value cement as binding material have been manufactured.

为使水泥更好地与各种玻璃纤维复合成玻璃纤维水泥制品,研制了Ⅰ型低碱度水泥。这种水泥的特点是调整钙矾石、水化氧化铝、C-S-H凝胶和石膏的比例,使水泥水化液相中的CaO浓度小于20mg/l,以达到既具有稳定的水化产物,又能保证水泥石强度之目的。加速试验的结果表明,中碱玻璃纤维在低碱度水泥浆中的耐久性比在硅酸盐水泥浆中更少高20倍。抗碱玻璃纤维与低碱度水泥复合具有最佳耐久性。 文中论述了Ⅰ型低碱度水泥的性能,特别是在大气中的稳定性和长期耐久性。 已制成各种玻璃纤维增强Ⅰ型低碱度水泥制品,包括平板、小波瓦和外墙板。

The authorcs have done some studies on the durability of medium-alkali glass fiber reinforced various cement and such tests as X-ray diffraction analysis, SEM analysis, Laser Raman Spectrum analysis and a lot of tests of the macromcchanics of the GRC. The GRC made with medium-alkali glass fiber and low-alkalimity cement turns out to be with good durability, which has been proved through ten year's natural weathering test and one and a half years' accelerating test.

本文对中碱玻纤增强各种水泥的长期耐久性进行了研究,并对玻纤增强水泥进行了X-射线衍射分析、SEM分析、激光拉曼、光谱分析以及大量宏观机理分析.通过十年自然老化试验和一年半加速老代试验,证明中碱玻纤增强低碱度水泥具有良好的长期耐久性.

This paper elucidates the alkalinity of the low pH value cement,which requires a pH value less than 10 7 to ensure long term durability of GRC products.Samples of glass with special composition,alkali resistant glass fibers and normal glass fibers were studied using different techniques including XPS.The results have confirmed that pH= 10 7 is the turning point and the alkali corrosion of glass or glass fibers is reduced to the minimum when pH< 10 7

阐明了用于玻璃纤维增强水泥(GRC)制品的水泥品种的碱度,其pH值应小于10.7,方可保持GRC制品的长期耐久性。运用多种实验手段,包括X射线光电子能谱(XPS)在内,对制备的几种特定组分玻璃以及抗碱玻纤和中碱玻纤进行了研究,确定pH=10.7是一个转折点,当pH<10.7时,对玻璃(或玻纤)的侵蚀最小。

 
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