Practical highway engineering guidance for Granular Sub-Base (GSB), Wet Mix Macadam (WMM), granular pavement construction, material quality, compaction control, field testing and inspection documentation.
Access practical construction guides, material quality references, compaction controls, inspection checkpoints and engineering resources for highway pavement works.
Material selection, grading, laying, moisture conditioning, compaction and field quality checks.
Plant-mixed aggregate production, transportation, laying, moisture control and rolling operations.
A reference for planning material testing and reviewing granular-work quality records.
Browse related HQT articles on granular pavement construction, compaction and field testing.
An Excel resource for documenting and reviewing GSB mix-design inputs and available calculations.
An Excel resource for WMM mix-design documentation and review of supported workbook calculations.
Try another keyword, such as GSB, WMM, QA/QC, compaction, field density or mix design.
Follow the applicable construction sequence, approved method statement, drawings, project specifications, Quality Assurance Plan (QAP) and Inspection and Test Plan (ITP).
Verify drawings, approved materials, method statement, mix-design documents where applicable, QAP, ITP and equipment readiness.
Check readiness, surface condition, line, level, width, cross-fall and the required inspection approval.
Control material quality, gradation, handling, segregation, spreading, layer thickness and moisture.
Follow the approved rolling procedure and complete specified field-density and other QC checks.
Verify finished levels, width, cross-fall, compacted thickness and surface regularity against requirements.
Identify non-conformities, correct defective areas using an approved procedure and arrange retesting as required.
Compile test reports, survey records, inspection requests, material approvals and applicable checklists.
Offer the completed layer for inspection and obtain the required approval before the next construction activity.
Plan inspections and testing around the particular pavement layer, approved project requirements and applicable acceptance criteria.
Review source approval, sieve analysis, specified aggregate properties, cleanliness and conformity with the approved grading envelope.
Verify the applicable laboratory compaction reference, field moisture condition, rolling procedure and specified field-density requirements.
Check compacted thickness, finished levels, width, cross-fall and surface regularity against approved drawings and applicable tolerances.
For WMM, verify plant readiness, proportioning and mixing controls, transportation, laying equipment and the approved construction procedure.
Monitor segregation, loose material, rutting, soft spots, uneven surfaces and drainage issues. Rectify non-conformities before acceptance.
Maintain applicable material reports, test results, survey checks, inspection requests, calibration records and layer-approval documents.
Explore material-specific workbooks and technical references to support granular-work documentation and QA/QC review.
GSB mix-design documentation and workbook resources.
WMM mix-design documentation and workbook resources.
Explore the combined granular and cement-treated material QA/QC toolkit.
A reference for test planning and acceptance review.
Granular works are an important part of flexible pavement construction. Granular Sub-Base (GSB) provides a foundation layer with specified support and drainage characteristics, while Wet Mix Macadam (WMM) is used as a granular pavement layer in accordance with the applicable pavement design and contract requirements.
Proper construction requires control of material properties, grading, layer placement, moisture conditioning, compaction, thickness, finished levels and surface quality. Inspection and testing should be planned before work starts and carried out in accordance with the approved Inspection and Test Plan (ITP), Quality Assurance Plan (QAP), applicable MoRTH Specifications and project-specific requirements.
GSB construction begins with verification of the prepared underlying layer, approved material sources and specified grading requirements. The material is spread to the required profile, moisture-conditioned where required, compacted and checked for thickness, levels, width and other specified acceptance parameters. Material properties and field tests must meet the applicable project requirements.
Read the dedicated GSB Construction Methodology for more detailed guidance.
WMM construction involves control of aggregate grading, approved material proportions, plant mixing, moisture, transportation, laying and compaction. Site personnel should check plant operations, uniformity of the mix, segregation, laying thickness, rolling sequence and completed-layer geometry. The specified field tests and inspections must be completed before the layer is offered for acceptance.
Read the dedicated WMM Construction Methodology for further details.
Inadequate material control, segregation, poor moisture management, insufficient compaction and geometric irregularities can adversely affect pavement performance. Systematic inspection, documented test results and timely correction of non-conformities help establish consistent construction quality and support formal layer acceptance.
Test selection, frequency, sampling arrangements and acceptance criteria should be taken from the applicable contract, MoRTH specifications, approved ITP/QAP and Engineer's instructions. A general reference should not be treated as a substitute for project-specific requirements.
This hub is intended for highway site engineers, QA/QC engineers, materials engineers, laboratory technicians, survey teams, contractors and consultants who need practical access to granular-work methodology, inspection checkpoints, testing references and engineering resources.
Explore practical construction methodologies, material testing references and Excel resources for highway pavement construction.
Explore All Construction MethodologiesEngineering Precision. Digital Quality. Highway Excellence.
© 2026 HIGHWAY QUALITY TEST. All rights reserved.
