耐久性

Recently, the cracks of concrete are common in building structures, they appear in the slab of roof, the slab of wall, basement and so on. They affect the safety and durability, and lead to trouble and compensation in real estate. Although many of clacks do not affect the safety of building, people believe that the cracks are the sign of dangerous, and are afraid of the cracks.

近年来，混凝土的裂缝问题在工程实践中越来越突出，楼面板、墙板、地下室等的开裂现象随处可见，对结构的安全性、耐久性提出了考验，在房地产开发中由于裂缝问题引起的纠纷和索赔不计其数。

The concretes crack may lead to the damage of service performance and duration of engineering structure.

混凝土裂缝可能使工程结构的使用功能或耐久性造成损害。

Calculation of bearing capacity of corroded members is the key to the durability assessment of reinforced concrete structures.

受腐蚀构件承载力的计算是混凝土结构耐久性评估的关键。

Therefore, seeking the new method of deicing or snow-melting is of great importance to our daily life.

而目前广泛采用的撒盐法化雪又严重影响到混凝土的耐久性。

However, the most commonly used deicing salt will reduce the endurance of the concrete road surface.

而目前广泛采用的撒盐法化雪又严重影响到混凝土的耐久性。

Recent advances in pelleting include "high-temperature, short-time" and "expansion" conditioning. The pressure and heat from the steam and friction in the expander increases starch gelatinization, denatures proteins, deactivates some antinutritional factors and destroys pathogenic and spoilage microorganisms. These advances have improved pellet production efficiency and pellet quality, which is usually measured by the pellet durability index.

制粒上新近的进步包括调质上的&高温－短时&、&膨化&，来自蒸汽的压力和热量以及膨化机的磨擦能增加淀粉糊化使蛋白质变性、使一些抗营养因子失活、杀死病原菌及微生物，这些进展已经改进了颗粒饲料生产率和颗粒质量，颗粒质量是以颗粒的耐久性系数来衡量的。

The working mechanism of air entraining agent in concrete and factors influencing the air content of concrete were described,and the influence of air entraining agent on newly mixed concrete properties and on durability,compressive strength and flexural-tensile strength etc.

阐述了引气剂在混凝土中的作用机理以及影响混凝土含气量的因素，介绍了引气剂对新拌混凝土性能和硬化混凝土的耐久性、抗压强度、抗弯拉强度等性能的影响。

As long as precured period of fresh concrete was sufficient, the air bubbles would not make any disadvantage. At the same time entraining air in concrete improved the bleeding and isolation in concrete, the long team performance and durability of concrete were improved obviously.

只要对新拌混凝土进行充分的预养护，对引气混凝土进行蒸养并不会对混凝土产生不良影响，同时由于引气后改善了混凝土泌水和离析，混凝土的长期性能和耐久性将会得到明显的改善。

From original rosin heat aggregated air entraining agent and naphthalene-based water reducer to high performance water reducer,the concrete admixture plays an important role in improving concrete durability and construction quality,and reducing cement and water quantity of concrete.

从最初的松香热聚物引气剂，20世纪七八十年代发展起来的萘系等减水剂，到以后的高效减水剂，在提高混凝土耐久性和施工质量，减少混凝土单方水泥用量和用水量方面起到了非常重要的作用。

The dynamic behavior tests of the aging VE dampers are also introduced in this paper, and the conclusion is drawn that the VE damper has good durability as most of VE material enwrapped by the steel plates.

本文还介绍了国内外还没有做过的老化粘弹性阻尼器的动态力学性能试验，得出结论：由于粘弹性阻尼器中的大部分粘弹性材料有钢板的包裹，具有良好的耐久性。

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％。