Asphalt Testing in Riyadh
Lab and field asphalt testing — Marshall stability, bitumen content, gradation, asphalt core per ASTM D6926 & D2172 to ensure pavement layer quality.
Asphalt testing is a set of field and laboratory tests on bituminous mixes verifying bitumen content, gradation, Marshall stability, and pavement compaction density. Performed by an accredited lab per ASTM and Saudi Ministry of Transport specifications, it ensures asphalt works comply with the job mix formula (JMF) before, during and after paving on road projects.
What Is Asphalt Testing and Why Is It Essential for Pavement Layers?
Asphalt testing is a set of checks starting from the mix design (JMF) and continuing after the final layer is paved on the road. This includes determining bitumen content and aggregate gradation, Marshall testing to measure mix stability under load, and post-paving asphalt core extraction to verify thickness and actual compaction ratio.
Asphalt layers endure repeated traffic loads and Saudi Arabia's high temperatures — any deviation in bitumen content or compaction accelerates rutting and premature cracking. Precise asphalt testing protects a road project from costly repaving within just a few years of construction.
As a laboratory accredited to ISO/IEC 17025:2017 (SAAC accreditation No. N-T-00645) and approved by MODON and prequalified on the KIDANA platform for Hajj route projects, Asas Lab performs field and lab asphalt testing in Makkah, Jeddah, Madinah, Riyadh, and Qassim, issuing certified JMF and asphalt core reports accepted by government authorities.
Extending pavement layer service life
Avoiding premature repaving
JMF mix design compliance
Government acceptance for road projects
Full List of Certified Tests
10 certified tests per international standards
Prime Coat Spray Rate (MC1)
معدل رش الطبقة التشريبية (MC1)
Verifies the prime coat (MC1) spray application rate on the base layer before asphalt paving — essential for ensuring bond between pavement layers.
Unit: test
Tack Coat Spray Rate (RC2)
معدل رش الطبقة اللاصقة (RC2)
Verifies the tack coat (RC2) spray application rate between asphalt layers — prevents slippage and delamination between layers under traffic loads.
Unit: test
Bitumen Content in asphalt mix
نسبة البيتومين في الخلطة الإسفلتية
Determines the actual bitumen content in the asphalt mix versus the job mix formula (JMF) — deviation directly affects asphalt layer durability.
Unit: sample
Gradation of asphalt sample
التدرج الحبيبي للأسفلت
Analyzes aggregate particle size distribution within the asphalt mix to verify compliance with the approved gradation curve in the mix design.
Unit: sample
Maximum Theoretical Specific Gravity (Gmm)
أقصى كثافة نوعية نظرية (Gmm)
Measures the maximum theoretical specific gravity of the asphalt mix with zero air voids — a key reference value for calculating field asphalt compaction ratio.
Unit: sample
Marshall Stability & Flow (6 molds)
الثبات والفاقد — مارشال (6 قوالب)
Measures asphalt mix stability and flow under load using 6 Marshall molds — the reference test for asphalt mix design in Saudi road projects.
Unit: sample
Flash Point (bitumen)
نقطة التوهج (البيتومين)
Determines the temperature at which bitumen begins releasing flammable vapors — a key safety indicator when heating bitumen on site.
Unit: sample
Viscosity Coefficient (bitumen)
معامل اللزوجة (البيتومين)
Measures bitumen's resistance to flow at operating temperatures — determines the optimal mixing and spraying temperature for quality asphalt layers.
Unit: sample
JMF Quality Control (Coarse Agg, Fine Agg, Filler, MC1)
مراقبة جودة مكونات الخلطة (JMF)
Ongoing quality monitoring of asphalt mix components (coarse aggregate, fine aggregate, filler, and MC1) to confirm the mixing plant follows the approved JMF.
Unit: test
Asphalt Core Sampling (with report)
كور أسفلتي (مع تقرير)
Extracting a cylindrical core from the paved asphalt layer to measure actual thickness and compaction ratio against design specifications.
Unit: sample
Asphalt Testing in Riyadh — Roads Engineered for Desert Heat and Vision 2030 Traffic
Riyadh's pavement surface temperatures exceed 75°C in summer, making rutting resistance the primary design criterion. ASAS Lab performs Marshall testing at 60°C, Dynamic Creep at 60°C, and Hamburg Wheel Tracking to simulate repeated loading in high heat — determining whether the mix needs polymer modification (PG 76-10 or higher) to resist permanent deformation. Multi-team QC programs cover material testing pre-paving, nuclear density during compaction, and core extraction for thickness, texture, and air void verification on major Vision 2030 road projects.
Adopted Engineering Standards
All asphalt tests are performed per international standards and Saudi transport specifications
ASTM
The American standard for bitumen and asphalt mix testing
AASHTO
American Association of State Highway and Transportation Officials standard
وزارة النقل
Saudi Ministry of Transport and Logistics Services specifications
ISO 17025
International laboratory accreditation for competence and accuracy
How Does the Asphalt Testing Process Work?
From mix design to the final asphalt core report
Contact and Scope Definition
We receive your request and define the required tests based on road type, project length, and the supervising authority's specifications. We send the quotation within 24 hours.
Site Visit and Sampling
Our team visits the site to collect asphalt mix and bitumen samples, and monitors prime/tack coat spray rate and layer thickness before and during paving.
Laboratory Analysis
Samples are analyzed in our accredited laboratories per ISO 17025 to determine bitumen content, gradation, and Marshall stability, comparing results against the JMF mix design.
Certified Report Delivery
You receive the complete asphalt report including core results, compaction ratio, and recommendations — ready for submission to the road supervising authority.
Why ASAS Lab?
Approved by MODON, ACI, NRRC & KIDANA
Over 500 completed projects across KSA
Makkah, Jeddah, Madinah, Riyadh, Qassim
Precise asphalt testing determines a road's expected lifespan and prevents rutting and early cracking
Engineering-certified reports accepted by government authorities and developers
Marshall equipment and ovens calibrated periodically per ISO 17025
Approved by MODON and prequalified on KIDANA for Hajj route projects
5 branches in Makkah, Jeddah, Madinah, Riyadh and Qassim
Fast response to cover extended and continuous paving works
15+ years and 500+ projects in roads and infrastructure works
What Does the Asphalt Test Report Include?
The asphalt report is the reference the supervisor relies on to accept executed pavement layers
Actual bitumen content versus mix design
Aggregate gradation curve
Marshall stability and flow results
Thickness and compaction ratio from core samples
Comparison of results against Ministry of Transport specifications
Acceptance recommendation or need for corrective works
FAQ About Asphalt Testing
Saudi specifications and the Roads Authority require Marshall test (ASTM D6926) for mix design, bitumen content determination (ASTM D2172), gradation, and maximum theoretical specific gravity (ASTM D2041). Asphalt cores are also taken post-paving to verify in-place density.
Asas Lab Branch in Riyadh
Our field team operates from our حي الندوة branch, covering all districts of Riyadh and nearby areas with calibrated, certified equipment — reports are certified and accepted by government authorities.
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Other Services You May Need
Explore the rest of our accredited engineering tests in one place
Soil
Soil Testing
Pre-construction soil testing per Saudi Building Code SBC 303 and international ASTM standards — protecting your project's foundations from settlement and cracking risks.
Concrete
Concrete Testing
Certified fresh and hardened concrete testing — pour supervision, compressive strength, core sampling, concrete durability per ASTM and SASO 1452.
Aggregate
Aggregate Testing
Laboratory aggregate testing including gradation, abrasion resistance, specific gravity, and soundness — per ASTM C131 and C136 to verify aggregate compliance for concrete and asphalt mixes.
Rebar
Rebar & Steel Testing
Mechanical and chemical testing for rebar and anchor bolts — tensile, yield, elongation, bend, and chemical analysis per ASTM A615 and SASO 2510 to verify steel compliance.
Chemical
Chemical Analysis
Chemical analysis of water, soil, and aggregate covering pH, sulfates, chlorides, and TDS — to determine environmental aggressiveness on construction materials.
Blocks
Blocks, Interlock & Curbstones Testing
Compressive strength, water absorption, and dimensional testing for concrete blocks, interlock, and curbstones per ASTM C880 and C99 to verify paving material compliance.
Do You Have a Road Project Underway?
Our engineering team is ready to cover your asphalt paving works, with an accurate quotation within 24 hours — asphalt testing available in 5 cities across the Kingdom
Makkah — Jeddah — Madinah — Riyadh — Qassim