freshly placed concrete

简明释义

新拌灌注混凝土

英英释义

例句

1.After pouring the freshly placed concrete, we must wait at least 24 hours before allowing any traffic.

在浇筑完新浇筑的混凝土后，我们必须至少等24小时才能允许任何交通通过。

2.The workers need to avoid stepping on the freshly placed concrete to prevent leaving footprints.

工人们需要避免踩在新浇筑的混凝土上，以免留下脚印。

3.The contractor recommended using a protective cover over the freshly placed concrete to shield it from rain.

承包商建议在新浇筑的混凝土上使用保护罩，以防止雨水侵袭。

4.We used a special additive to strengthen the freshly placed concrete against cracking.

我们使用了一种特殊添加剂来增强新浇筑的混凝土抵抗开裂的能力。

5.It is important to keep the freshly placed concrete moist to ensure proper curing.

保持新浇筑的混凝土湿润对确保适当养护非常重要。

作文

Concrete is one of the most widely used construction materials in the world. It provides strength, durability, and versatility for various structures, from buildings to bridges. One of the key aspects of working with concrete is understanding the importance of the timing and conditions under which it is placed. When we refer to freshly placed concrete, we are talking about concrete that has just been poured and is still in its plastic state, meaning it has not yet set or cured. This phase is crucial for ensuring the integrity and longevity of the final structure.The process of pouring freshly placed concrete involves several steps, beginning with mixing the right proportions of cement, water, sand, and aggregates. The quality of the mix significantly affects the performance of the concrete. Once the mix is prepared, it is transported to the site and poured into the designated forms.During this initial stage, the freshly placed concrete must be handled with care. It is essential to ensure that the surface is level and free of air pockets, which can weaken the final product. Workers often use tools such as screeds and trowels to smooth and shape the surface of the freshly placed concrete. Additionally, vibrations may be applied to help settle the concrete and eliminate any trapped air.One of the critical factors to consider when dealing with freshly placed concrete is the weather. High temperatures can cause the concrete to set too quickly, leading to cracks and reduced strength. Conversely, cold weather can slow down the curing process, which might delay construction schedules. To mitigate these issues, contractors often employ various techniques, such as using curing compounds or insulating blankets, to protect the freshly placed concrete from extreme temperatures.After the concrete has been poured and shaped, it enters the curing phase. This is when the concrete begins to harden and gain strength. Curing is vital because it allows the hydration process to occur, where water reacts with cement to form a strong bond. During this period, it is crucial to keep the freshly placed concrete moist to prevent it from drying out too quickly, which can lead to surface cracking and other issues.In conclusion, the management of freshly placed concrete is a fundamental aspect of successful construction practices. Understanding its properties and the necessary precautions during the pouring and curing phases can significantly impact the overall quality and durability of the structure. As construction technology continues to advance, new methods and materials are being developed to improve the performance of freshly placed concrete, making it an even more reliable choice for builders around the world. By paying close attention to the details involved in working with freshly placed concrete, we can ensure that our structures stand the test of time and meet the demands of modern engineering.

混凝土是世界上使用最广泛的建筑材料之一。它为各种结构提供了强度、耐久性和多功能性，从建筑物到桥梁。处理混凝土的一个关键方面是了解浇筑的时机和条件的重要性。当我们提到新浇筑的混凝土时，我们指的是刚刚倒入且仍处于塑性状态的混凝土，这意味着它尚未凝固或固化。这一阶段对确保最终结构的完整性和耐久性至关重要。浇筑新浇筑的混凝土的过程包括几个步骤，首先是混合水泥、水、沙子和骨料的正确比例。混合物的质量显著影响混凝土的性能。一旦混合物准备好，它就会被运输到现场并倒入指定的模具中。在这个初始阶段，必须小心处理新浇筑的混凝土。确保表面平整且没有气泡是至关重要的，因为气泡会削弱最终产品。工人们通常使用刮板和抹子等工具来平滑和塑造新浇筑的混凝土的表面。此外，可能会施加振动以帮助沉降混凝土并消除任何被困的空气。处理新浇筑的混凝土时需要考虑的一个关键因素是天气。高温可能导致混凝土过快凝固，导致开裂和强度降低。相反，寒冷的天气可能会减缓固化过程，这可能会延迟施工进度。为了减轻这些问题，承包商通常采用各种技术，例如使用固化剂或绝缘毯，以保护新浇筑的混凝土免受极端温度的影响。在混凝土浇筑和成型后，它进入固化阶段。这时，混凝土开始硬化并获得强度。固化至关重要，因为它允许水合过程发生，在此过程中水与水泥反应形成强大的结合。在此期间，保持新浇筑的混凝土湿润至关重要，以防止其过快干燥，这可能导致表面开裂和其他问题。总之，管理新浇筑的混凝土是成功建筑实践的一个基本方面。理解其特性以及在浇筑和固化阶段所需的预防措施可以显著影响结构的整体质量和耐久性。随着建筑技术的不断进步，正在开发出新的方法和材料，以改善新浇筑的混凝土的性能，使其成为建筑商在全球范围内更可靠的选择。通过密切关注与新浇筑的混凝土相关的细节，我们可以确保我们的结构经得起时间的考验，并满足现代工程的需求。