chemical admixture

简明释义

化学掺合料

英英释义

例句

1.Adding a chemical admixture can enhance the durability of the structure significantly.

添加化学外加剂可以显著增强结构的耐久性。

2.The chemical admixture used in the project was designed to accelerate the curing process.

项目中使用的化学外加剂旨在加速固化过程。

3.Using a chemical admixture can help achieve higher compressive strength in concrete.

使用化学外加剂可以帮助混凝土获得更高的抗压强度。

4.The engineer recommended a specific chemical admixture to reduce water permeability in the concrete mix.

工程师推荐了一种特定的化学外加剂以减少混凝土混合物的水渗透性。

5.The construction team decided to use a chemical admixture to improve the workability of the concrete.

施工队决定使用化学外加剂来改善混凝土的可操作性。

作文

In the field of construction and civil engineering, the term chemical admixture refers to a material other than water, aggregates, and cement that is added to concrete or mortar to enhance its performance. These additives play a crucial role in modifying the properties of the concrete, making it more suitable for various applications. The use of chemical admixture has become increasingly popular due to the numerous benefits they offer, including improved workability, increased strength, and enhanced durability.One of the primary reasons for incorporating chemical admixture into concrete mixtures is to improve workability. Workability refers to how easily the concrete can be mixed, placed, and finished. By adding certain types of chemical admixture, such as plasticizers or superplasticizers, the viscosity of the concrete can be reduced, allowing it to flow more freely without compromising its strength. This is particularly beneficial in complex forms or when working with intricate designs, as it allows for easier placement and reduces the likelihood of air pockets or voids within the finished product.Another significant advantage of using chemical admixture is the enhancement of concrete strength. Some admixtures are designed to accelerate the hydration process, leading to faster strength gain in the early stages of curing. This can be particularly valuable in cold weather conditions where traditional curing methods may be less effective. On the other hand, there are also chemical admixture options available that can slow down the curing process, allowing for longer working times in hot weather. This flexibility enables engineers and contractors to tailor the concrete mixture to meet specific project requirements, ensuring optimal performance regardless of environmental conditions.Durability is another critical aspect that chemical admixture can significantly improve. Certain admixtures are formulated to enhance resistance to chemical attacks, freeze-thaw cycles, and shrinkage cracking. For example, air-entraining agents create microscopic air bubbles within the concrete, which help absorb the stresses caused by freezing and thawing cycles. This is especially important in regions with harsh winter climates, where concrete structures are at risk of damage from ice formation. Additionally, using chemical admixture that improves resistance to sulfate attack can prolong the lifespan of concrete in environments where sulfates are present in the soil or groundwater.Moreover, chemical admixture can contribute to sustainability in construction practices. By optimizing the performance of concrete, these additives can reduce the need for excessive amounts of cement, which is a significant contributor to carbon emissions in the construction industry. Utilizing chemical admixture to achieve desired properties with lower cement content not only helps reduce the environmental impact but also lowers material costs, making projects more economically viable.In conclusion, the incorporation of chemical admixture in concrete mixtures has revolutionized the construction industry by enhancing the performance and durability of concrete. From improving workability to increasing strength and promoting sustainability, these additives are essential tools for engineers and contractors. As technology advances, the development of new and innovative chemical admixture continues to expand, offering even more possibilities for creating high-performance concrete that meets the demands of modern construction projects.

在建筑和土木工程领域，术语化学外加剂指的是除了水、骨料和水泥之外，添加到混凝土或砂浆中以增强其性能的材料。这些添加剂在改变混凝土的特性方面发挥着至关重要的作用，使其更适合各种应用。由于化学外加剂提供了许多好处，包括改善可加工性、增加强度和增强耐久性，其使用变得越来越普遍。将化学外加剂纳入混凝土混合物的主要原因之一是改善可加工性。可加工性是指混凝土混合、放置和完成的难易程度。通过添加某些类型的化学外加剂，如塑化剂或超塑化剂，可以降低混凝土的粘度，使其在不影响强度的情况下更自由地流动。这在复杂的模具或处理精细设计时尤其有益，因为它使放置更容易，并减少成品中空气口袋或空隙的可能性。使用化学外加剂的另一个重要优点是增强混凝土的强度。某些外加剂旨在加速水化过程，从而在养护的早期阶段实现更快的强度增长。这在寒冷天气条件下尤其有价值，因为传统的养护方法可能效果较差。另一方面，还有一些化学外加剂选项可以减缓养护过程，在炎热天气下允许更长的工作时间。这种灵活性使工程师和承包商能够根据特定项目要求量身定制混凝土混合物，确保无论环境条件如何都能实现最佳性能。耐久性是化学外加剂可以显著改善的另一个关键方面。某些外加剂的配方旨在增强对化学侵蚀、冻融循环和收缩开裂的抵抗力。例如，掺入引气剂可以在混凝土中形成微小的气泡，这有助于吸收由冻融循环引起的应力。这在气候严酷的冬季地区尤为重要，因为混凝土结构面临冰形成造成的损害。此外，使用增强对硫酸盐侵蚀抵抗力的化学外加剂可以延长混凝土在土壤或地下水中存在硫酸盐的环境中的使用寿命。此外，化学外加剂还可以促进建筑实践的可持续性。通过优化混凝土的性能，这些添加剂可以减少对过量水泥的需求，而水泥是建筑行业碳排放的重要来源。利用化学外加剂以较低的水泥含量达到所需的性能不仅有助于减少环境影响，还降低了材料成本，使项目更具经济可行性。总之，将化学外加剂纳入混凝土混合物已经彻底改变了建筑行业，通过增强混凝土的性能和耐久性。从改善可加工性到增加强度和促进可持续性，这些添加剂是工程师和承包商的重要工具。随着技术的进步，新型和创新的化学外加剂的开发仍在继续，提供了更多创造高性能混凝土的可能性，以满足现代建筑项目的需求。