newly placed concrete

简明释义

新浇混凝土

英英释义

例句

1.After pouring the newly placed concrete, we used a trowel to smooth the surface.

在浇筑完新浇筑的混凝土后，我们用抹子将表面抹平。

2.It is essential to ensure that the newly placed concrete is kept moist for the first few days.

确保新浇筑的混凝土在前几天保持湿润是至关重要的。

3.The contractor advised us to avoid walking on the newly placed concrete until it has cured properly.

承包商建议我们在新浇筑的混凝土没有完全固化之前不要走上去。

4.The workers were instructed to keep the area clear of debris around the newly placed concrete.

工人们被指示保持新浇筑的混凝土周围区域清洁，无杂物。

5.We need to cover the newly placed concrete with plastic sheeting to protect it from rain.

我们需要用塑料布覆盖新浇筑的混凝土，以保护它免受雨水侵袭。

作文

Concrete is one of the most widely used construction materials in the world. It is a composite material that consists of fine and coarse aggregate bonded together with a fluid cement that hardens over time. One of the key stages in any concrete construction project is the pouring and setting of the concrete. This is where the term newly placed concrete comes into play. The phrase refers to concrete that has just been poured and is in the process of setting and curing. Understanding the properties and behavior of newly placed concrete is crucial for builders and engineers alike.When newly placed concrete is poured, it is in a plastic state, which means it can be shaped and molded into various forms. The workability of the concrete at this stage is essential for achieving the desired finish and structural integrity. Builders often use tools like trowels and vibrators to ensure that the newly placed concrete fills all the voids in the formwork and eliminates air pockets. This step is vital because any trapped air can weaken the concrete and lead to structural failures later on.Once the newly placed concrete is properly worked into place, it begins to undergo a chemical reaction known as hydration. This process transforms the fluid mixture into a solid structure. During the first few hours after pouring, the concrete is particularly vulnerable to environmental factors such as temperature and humidity. For instance, if the temperature is too high, the water in the newly placed concrete can evaporate too quickly, leading to cracking and reduced strength. Therefore, it is essential to protect the newly placed concrete from harsh weather conditions during its initial curing period.Curing is another critical aspect of working with newly placed concrete. Curing refers to the process of maintaining adequate moisture, temperature, and time to allow the concrete to achieve its desired strength and durability. This can involve covering the surface with wet burlap, applying curing compounds, or even using water sprays. Proper curing of newly placed concrete can significantly enhance its performance and longevity, making it resistant to wear and environmental stresses.In addition to strength, the appearance of newly placed concrete is also important. Many builders strive for an aesthetically pleasing finish, whether it be through polishing, staining, or stamping the surface. The techniques used on newly placed concrete can greatly affect the final look of the structure. For example, decorative finishes may require specific treatments while the concrete is still in its plastic state to ensure proper adhesion and appearance.In conclusion, understanding newly placed concrete is essential for anyone involved in construction. From its initial placement to the curing process, every step plays a pivotal role in determining the overall quality and longevity of the concrete structure. By paying close attention to the characteristics and needs of newly placed concrete, builders can ensure that their projects stand the test of time and meet the necessary safety standards. Thus, mastering the handling of newly placed concrete is not just a skill but an art that contributes to the successful completion of construction projects worldwide.

混凝土是世界上使用最广泛的建筑材料之一。它是一种复合材料，由细骨料和粗骨料与流动的水泥结合在一起，随着时间的推移而硬化。在任何混凝土施工项目中，一个关键阶段是混凝土的浇筑和固化。这时，“新浇筑混凝土”这个术语就派上用场了。这个短语指的是刚刚浇筑并正在固化和养护过程中的混凝土。理解新浇筑混凝土的特性和行为对于建筑商和工程师都至关重要。当新浇筑混凝土被浇筑时，它处于塑性状态，这意味着它可以被塑形和模制成各种形式。在这一阶段，混凝土的可加工性对于实现所需的表面处理和结构完整性至关重要。建筑商通常使用抹子和振动器等工具，以确保新浇筑混凝土填满模具中的所有空隙，并消除气泡。这一步至关重要，因为任何被困的空气都会削弱混凝土并导致后期的结构失败。一旦新浇筑混凝土被正确处理到位，它就开始经历一种称为水化的化学反应。这个过程将流体混合物转变为固体结构。在浇筑后的头几个小时内，混凝土特别容易受到温度和湿度等环境因素的影响。例如，如果温度过高，新浇筑混凝土中的水分可能会蒸发得太快，从而导致开裂和强度降低。因此，在混凝土初步养护期间，保护新浇筑混凝土免受恶劣天气条件的影响是至关重要的。养护是处理新浇筑混凝土的另一个关键方面。养护是指保持适当的湿度、温度和时间，以允许混凝土达到所需的强度和耐久性。这可能涉及用湿麻布覆盖表面、施加养护剂，甚至使用喷水。对新浇筑混凝土进行适当的养护可以显著增强其性能和使用寿命，使其能够抵御磨损和环境压力。除了强度外，新浇筑混凝土的外观也很重要。许多建筑商努力追求美观的表面，无论是通过抛光、染色还是压印表面。对新浇筑混凝土使用的技术可以极大地影响结构的最终外观。例如，装饰性表面可能需要在混凝土仍处于塑性状态时进行特定处理，以确保良好的附着力和外观。总之，理解新浇筑混凝土对任何参与建筑的人来说都是至关重要的。从初始的浇筑到养护过程，每一步在决定混凝土结构的整体质量和耐久性方面都发挥着关键作用。通过密切关注新浇筑混凝土的特性和需求，建筑商可以确保他们的项目经得起时间的考验，并满足必要的安全标准。因此，掌握新浇筑混凝土的处理不仅是一项技能，更是一门艺术，促进了全球建筑项目的成功完成。