Final answer:
In some cases, concrete elements do not have to be cast on site thanks to the use of prefabricated concrete, which is made offsite with high accuracy and then transported for assembly at the construction site.
Step-by-step explanation:
In certain situations, concrete elements do not have to be cast on site. Advancements in construction technology have led to the use of prefabricated concrete, which is made using computer-aided machines that cut, construct, and process raw materials into pieces offsite. These pieces are then transported to the construction site, ensuring greater accuracy and reducing human error. Prefabrication benefits include faster construction rates, consistent quality due to controlled production environments, and the option for complex designs that might be difficult to cast in situ.
Lightweight concrete made of materials such as shale, clay, or slate has advantages like load reduction, durability, and thermal protection, making it suitable for prefabrication. Furthermore, robotics has enhanced the efficiency and precision of creating building materials, including those made from eco-friendly materials supporting contemporary architecture's demand for unusual shapes and environmentally responsible building practices. Additionally, engineers can incorporate specific design elements, such as gaps or expansion joints in prefabricated sections, to accommodate thermal expansion and contraction.