Blocks, Interlock & Curbstones Testing in Qassim
Compressive strength, water absorption, and dimensional testing for concrete blocks, interlock, and curbstones per ASTM C880 and C99 to verify paving material compliance.
Testing of concrete blocks, interlock pavers, and curbstones consists of laboratory checks verifying compressive strength, water absorption, and dimensions of precast building and paving materials. Performed by an accredited lab per ASTM C140, C880 and SASO specifications, it ensures cement blocks, interlock and curbstones comply with required standards before use in construction and paving projects.
What Is Block and Interlock Testing and Why Is It Required Before Supply?
Testing of blocks, interlock, and curbstones consists of laboratory checks performed on samples from each supply batch to verify compliance with the standard specification. It includes compressive strength to determine load capacity, water absorption reflecting material porosity, and dimensional checks ensuring manufacturing precision and uniform installation.
Cement blocks and interlock pavers are subjected to direct loads and continuous weathering — weak strength or high absorption accelerates cracking and deterioration within a few years of installation. Upfront testing of each supply batch protects the project from having to replace entire paving or wall areas later.
As a laboratory accredited to ISO/IEC 17025:2017 (SAAC accreditation No. N-T-00645) and approved by MODON, Asas Lab performs block, interlock and curbstone testing for factory suppliers and contractors in Makkah, Jeddah, Madinah, Riyadh, and Qassim, issuing certified compliance reports accepted by municipalities and developers.
SASO compliance for paving materials
Preventing installation of low-strength materials
Extending pavement and wall lifespan
Compliance certificates accepted by municipalities
Full List of Certified Tests
6 certified tests per international standards
Compressive Strength
مقاومة إجهاد الكسر
Measures the maximum load a block or interlock paver withstands before fracture — the core test verifying compliance with SASO requirements for structural or paving use.
Unit: sample
Water Absorption
نسبة الامتصاص
Measures water absorption inside the block or curbstone — high absorption indicates high porosity, weakening weathering and freeze-thaw resistance.
Unit: sample
Dimensions
الأبعاد
Verifies block or interlock dimensions match the standard specification — essential for accurate installation and uniform load distribution between units.
Unit: sample
Fire Resistance (blocks)
مقاومة الحريق (بلوك)
Evaluates cement block resistance to fire and high heat — required in buildings where the safety code mandates a specific fire-rating for walls.
Unit: sample
Flexural Strength (interlock)
نسبة الانحناء (إنترلوك)
Measures interlock paver flexural strength under traffic loads — a key durability indicator for car parks and walkways under continuous use.
Unit: sample
Modulus of Rupture (interlock)
معامل التمزق (إنترلوك)
Determines the interlock modulus of rupture, measuring resistance to fracture under bending — complements the flexural test in assessing paving unit durability.
Unit: test
Blocks and Interlock Testing in Qassim — Building Materials for Residential and Industrial Projects
Qassim's rapid urban expansion across Buraidah, Unayzah, Ar Rass, and surrounding cities consumes large volumes of concrete masonry units. ASAS Lab tests per SASO GSO 68: compressive strength (≥ 7.5 MPa load-bearing), water absorption (≤ 10% structural), and dimensional tolerance (≤ 3 mm). Industrial and commercial interlock pavers are additionally tested for wear resistance and heavy truck load capacity targeting a 25-year service life in Qassim's dry climate. Compliance certificates for building permit files issued within 7 working days.
Adopted Engineering Standards
All block and interlock tests are performed to adopted Saudi and international standards
ASTM C140
The American standard for concrete masonry unit testing
ASTM C880/C99
The American standard for interlock and curbstone testing
SASO
Saudi Standards, Metrology and Quality Organization
ISO 17025
International laboratory accreditation for competence and accuracy
How Does the Block and Interlock Testing Process Work?
From sample receipt to the compliance certificate
Contact and Product Type Definition
We receive your request and define the product type — blocks, interlock, or curbstones — and required tests based on use. We send the quotation within 24 hours.
Batch Sample Receipt
Our team receives representative samples from the supply batch per the required standard count, documenting the factory and batch for accurate traceability.
Laboratory Testing
Samples are tested in our accredited laboratories per ISO 17025 to measure compressive strength, water absorption, dimensions, and compliance with the standard specification.
Compliance Certificate Delivery
You receive an engineering-certified compliance certificate showing each sample's results — ready for submission to the municipality, consultant, or developer.
Why ASAS Lab?
Approved by MODON, ACI, NRRC & KIDANA
Over 500 completed projects across KSA
Makkah, Jeddah, Madinah, Riyadh, Qassim
Precast paving and building materials look similar on the surface — laboratory testing is the only true measure of actual quality
Certified compliance reports accepted by municipalities and developers
Compression presses and testing equipment calibrated periodically per ISO 17025
5 branches in Makkah, Jeddah, Madinah, Riyadh and Qassim
Accepting batches from multiple factories with independent reports
A specialized engineering team to interpret strength and absorption results
15+ years and 500+ projects in building and paving works
What Does the Block and Interlock Test Report Include?
The block and interlock report is the reference the developer or municipality relies on to accept a supply batch
Compressive strength in MPa
Water absorption percentage by weight
Actual dimensions compared to specification
Flexural strength or modulus of rupture for interlock
Comparison of results against adopted SASO specifications
Supply batch acceptance or rejection recommendation
FAQ About Blocks, Interlock & Curbstones Testing
SASO 1006 requires minimum compressive strength of 7 MPa for load-bearing blocks and 4 MPa for non-load-bearing. Interlock pavers must achieve minimum 35 MPa per ASTM C936.
Asas Lab Branch in Qassim
Our field team operates from our بريدة branch, covering all districts of Qassim and nearby areas with calibrated, certified equipment — reports are certified and accepted by government authorities.
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.
Asphalt
Asphalt Testing
Lab and field asphalt testing — Marshall stability, bitumen content, gradation, asphalt core per ASTM D6926 & D2172 to ensure pavement layer quality.
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.
Has a New Block or Interlock Batch Arrived?
Our engineering team is ready to receive samples, with an accurate quotation within 24 hours — block and interlock testing available in 5 cities across the Kingdom
Makkah — Jeddah — Madinah — Riyadh — Qassim