portland cement

简明释义

波特兰水泥

英英释义

例句

1.After curing, the portland cement will harden and provide a solid surface for the patio.

养护后，波特兰水泥将硬化，为露台提供坚固的表面。

2.The foundation of the building was constructed using portland cement, which provides excellent durability.

这座建筑的基础是用波特兰水泥建造的，具有优良的耐久性。

3.The contractor recommended using portland cement for the new driveway to ensure it withstands heavy vehicles.

承包商建议在新的车道上使用波特兰水泥，以确保其能够承受重型车辆。

4.Mixing portland cement with sand and gravel creates a strong concrete suitable for various constructions.

将波特兰水泥与沙子和碎石混合，可以产生适用于各种建筑的强混凝土。

5.For the sidewalk project, we opted for portland cement due to its strength and longevity.

对于人行道项目，我们选择了波特兰水泥，因为它的强度和耐久性。

作文

Portland cement is one of the most commonly used construction materials in the world. It is a key ingredient in concrete, which is the most widely used man-made material on Earth. The term portland cement refers to a specific type of cement that was first developed in the early 19th century by Joseph Aspdin, an English bricklayer. He named it after the Isle of Portland, a location in England known for its high-quality building stone. The unique properties of portland cement make it suitable for a wide range of construction applications, from residential buildings to massive infrastructure projects.The production of portland cement involves a series of processes that include the extraction of raw materials, grinding, and heating them in a kiln at high temperatures. The primary raw materials used in the manufacturing of portland cement are limestone and clay, which are combined and heated to create clinker. This clinker is then ground into a fine powder, which is what we refer to as portland cement. The chemical composition of portland cement typically includes calcium silicates, aluminates, and ferrites, which contribute to its strength and durability.One of the notable characteristics of portland cement is its ability to harden and gain strength over time. When mixed with water, it undergoes a chemical reaction known as hydration, which allows it to set and develop its structural integrity. This process can take weeks or even months, depending on environmental conditions. The strength of concrete made with portland cement increases as it cures, making it an ideal choice for various construction projects.In addition to its strength, portland cement also offers versatility. It can be used in different formulations to achieve specific properties, such as rapid setting, resistance to sulfate attack, or improved workability. This adaptability has led to the development of various types of portland cement, including Type I, Type II, and Type III, each designed for specific applications and performance criteria.However, the production of portland cement is not without its environmental impacts. The process emits a significant amount of carbon dioxide, contributing to greenhouse gas emissions. As a result, there has been a growing interest in finding more sustainable alternatives to portland cement, such as incorporating industrial by-products like fly ash or slag, or developing new types of eco-friendly cements. These innovations aim to reduce the carbon footprint associated with traditional portland cement production while maintaining its essential properties.In conclusion, portland cement plays a vital role in modern construction due to its strength, durability, and versatility. Understanding its properties and production methods is crucial for engineers and architects who design structures that will stand the test of time. As the industry moves towards more sustainable practices, the future of portland cement may evolve, but its significance in construction will undoubtedly remain.

波特兰水泥是世界上最常用的建筑材料之一。它是混凝土的关键成分，而混凝土是地球上使用最广泛的人造材料。波特兰水泥这一术语指的是一种特定类型的水泥，它在19世纪初由英国砖瓦工约瑟夫·阿斯平发明。他将其命名为“波特兰”，以此向英格兰的波特兰岛致敬，该岛以其高质量的建筑石材而闻名。波特兰水泥独特的性质使其适用于从住宅建筑到大型基础设施项目等各种建筑应用。波特兰水泥的生产涉及一系列过程，包括原材料的提取、研磨和在高温下加热。生产波特兰水泥的主要原材料是石灰石和粘土，这些原材料经过组合和加热形成熟料。然后将这些熟料研磨成细粉，这就是我们所称的波特兰水泥。波特兰水泥的化学成分通常包括硅酸钙、铝酸盐和铁酸盐，这些成分有助于其强度和耐久性。波特兰水泥的一个显著特征是其硬化并随着时间的推移而增强强度的能力。当与水混合时，它会发生一种称为水化的化学反应，使其能够凝固并发展出结构完整性。这个过程可能需要几周甚至几个月，具体取决于环境条件。使用波特兰水泥制成的混凝土的强度随着养护而增加，使其成为各种建筑项目的理想选择。除了强度外，波特兰水泥还具有多功能性。它可以用于不同的配方以实现特定的性能，例如快速凝固、抗硫酸盐侵蚀或改善可操作性。这种适应性促使了各种类型的波特兰水泥的发展，包括I型、II型和III型，每种类型都针对特定应用和性能标准进行设计。然而，波特兰水泥的生产并非没有环境影响。该过程排放大量二氧化碳，导致温室气体排放。因此，越来越多的人开始关注寻找更可持续的替代品，例如将工业副产品如粉煤灰或矿渣纳入其中，或开发新型环保水泥。这些创新旨在减少传统波特兰水泥生产所带来的碳足迹，同时保持其基本特性。总之，波特兰水泥因其强度、耐久性和多功能性在现代建筑中发挥着至关重要的作用。理解其特性和生产方法对于设计能够经受时间考验的结构的工程师和建筑师至关重要。随着行业朝着更可持续的实践发展，波特兰水泥的未来可能会演变，但其在建筑中的重要性无疑会继续存在。