The specification details the viscosity and penetration grades of bitumen acceptable for Tanzanian climates. It includes recipes for bituminous mixes, specifying aggregate gradation curves (sieve analysis) to ensure the road is neither too porous (leading to water damage) nor too smooth (leading to skidding hazards).
Technical specs for bridges, culverts, and concrete works. standard specification for roadworks 2000 tanzania pdf
This section covers natural gravel, crushed stone, and mechanically stabilized materials used in the load-bearing layers of the road. It highlights specific grading envelopes and Plasticity Index (PI) limits suitable for Tanzania’s diverse climatic zones. Series 5000: Bituminous Layers and Seals and environmental protection.
: Defines precise physical and chemical properties for all construction materials. standard specification for roadworks 2000 tanzania pdf
– Covers administrative requirements, site establishment, traffic accommodation, and environmental protection.