耐久性

Therefore the problem about relevantly durability of prestressed concrete structure is more and more valued by people.

目前，国内外对预应力混凝土结构的耐久性的研究报导较少，对于预应力筋应力腐蚀的研究则刚刚开始。

All concerned for setting up a remedial and maintenance program should understand the performance requirements, time limit for the project, the cost, the maintenance, geology, construction conditions, environmental protection, building material, and the stability change of the slope with time and the reservoir filling, stability under different combination of loads.

治理工程措施选择应充分考虑治理工程功能性的具体要求、在不同工况条件下的安全性及耐久性、工期要求和投资的经济性以及后期维护的要求、工程岩土体性质及其蓄水后的变化、场地条件、施工技术条件、地方材料资源等具体制约因素以及环境保护的要求。

It is found that fabric treated with 20g/L X-cape DRC,60g/L LK-30 has durable oil and water repellence,polyethylene type softener...

试验结果表明，X-cape DRC用量20 g/L、LK-30用量6 g/L、布面pH值6~8时，可获得较好的拒水拒油整理效果，且耐久性良好；调节手感时可加入聚乙烯类柔软剂129、平滑剂HLC。

The experiment shows the specimen's freezing and thawing repellence of 100% recycled aggregate concrete with city garbage melting slag, compared with specimen of the normal concrete whose coarse and fine aggregate's replacement ratio is 0%,the durability number indexes of using water and cement ratio 0.45 and 0.65 respectively decreased 5.3% and 7.9%,but all can satisfy the lowest index for evaluating freezing and thawing repellence.

试验结果表明，城市垃圾熔渣再生混凝土试件的冻融循环抵抗性与粗、细骨料置换率为0%的普通混凝土试件相比，水灰比0.45、0.65时的耐久性指数分别降低5.3%和7.9%，但都能满足评价冻融循环抵抗性的最低指标。

The examination of the steel bar corrosion and the determination of the corrosion condition may provides the foundation data of the reinforced concrete structure residuary load and the structure durability.

钢筋腐蚀检测和腐蚀状况判定可为钢筋混凝土结构的剩余载荷和结构耐久性提供基础数据。

The effects of WHⅡ super retarder to the compatibility and durability of concrete were studied.

研究了混凝土超缓凝剂对水泥和混凝土物理力学性能与耐久性的影响。

Road test based on safety, performance and comfort, including durability test, etc.

基于安全，性能和舒适性的道路试验，包括耐久性试验等

Many studies show that the property of crush rubber cement based materials was improved actively with the addition of crush rubber to cement based materials.

不少研究表明，橡胶颗粒用于水泥基材料后，对废橡胶水泥基材料的工艺性能、物理力学性能及耐久性的改善都能起到积极作用。

And reinforcement rustiness is very common in these cases.

因而对耐久性问题的研究是当前一个非常重要的课题。

The paper also indicates that influence of vertical crack on reinforcement rustiness is smaller than lengthwise crack, concrete basicity, concrete carbonate and so on.

钢筋锈蚀是导致钢筋混凝土结构耐久性等级下降的主要原因之一，本文根据工程调查，分析了混凝土状况对钢筋锈蚀程度的影响，认为垂直裂缝对钢筋锈蚀的影响程度远小于纵向裂缝、混凝土碱度、碳化等其它因素。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。