What is Item 311 of the DPWH Specification commonly referred to as?

Item 311 of the Department of Public Works and Highways (DPWH) Specification is commonly referred to as Portland Cement Concrete Pavement. This designation emphasizes the use of Portland cement as a primary binding agent in the concrete mix, which is essential for creating a durable, strong pavement structure. Portland cement concrete is known for its high compressive strength, long lifespan, and resistance to environmental factors, making it suitable for roads that experience heavy traffic and varying weather conditions.

The specification provides guidelines on the materials, construction processes, and quality control required to ensure that the concrete pavement meets the necessary performance standards. Understanding these specifications is crucial for engineers to ensure that the infrastructure they design and maintain can withstand the demands placed upon it.

In contrast, the other options describe different types of pavement and treatment methods that are not aligned with Item 311. For instance, asphalt concrete pavement involves a different type of binder and is laid using different methods, while bitumen surface treatment is a kind of surface sealing rather than a full pavement structure. Gravel surface course refers to unbound materials that do not provide the same strength and durability as concrete. Recognizing these distinctions is important for understanding the context of materials in civil engineering projects.