Premix Testing for Road Projects in Sarawak
Core, density, bitumen content and Marshall testing for road contractors and consultants, from Kuching across Sarawak.
Common Problems on Road Jobs
Core results needed for certification
The consultant wants core results before certifying the work. Without verified test records, progress claims and layer approvals stay on hold.
Core thickness comes out short
Core thickness comes out short and nobody knows until the report. Prompt coring detects layer deficiencies before further asphalt is laid.
Unverified on-site compaction
Compaction looks fine on site, but the core density says otherwise. Proper bulk relative density testing confirms whether roller passes achieved the required density.
Bitumen content disputes
Bitumen content is off and the batch plant asks for proof. Centrifuge extraction provides clear binder content and aggregate grading data to verify the mix.
Marshall results before laying
The mix design needs Marshall results before laying can start. Stability, flow, and volumetric analysis must be completed to approve the job mix formula.
Idle paving equipment
Samples sent far away mean days of waiting while the paver is idle. Testing within Sarawak avoids unnecessary job site delays.
Coring safety on live roads
Coring on a live road needs a crew that knows traffic and safety on site. Tell us the traffic arrangements when you book, so coring can be planned safely with your site team.
Rejected test reports
A report the consultant will not accept means testing twice. We test to JKR specifications and recognised standard methods, and issue a formal test report for each job.
Premix Tests We Carry Out
| Test Name | What It Tells You | Standard / Method |
|---|---|---|
| Premix coring with core thickness | Layer thickness against the design | ASTM D3549 |
| Relative (bulk) density of core | Compaction achieved on site | ASTM D2726 |
| Bitumen content by centrifuge extraction | Binder content against the job mix | ASTM D2172 |
| Sieve analysis of premix | Aggregate grading after extraction | ASTM D2172 / BS 812 |
| Marshall test (stability, flow, voids, density, specimen making) | Mix design and quality control | ASTM D6927 / ASTM D1559, JKR Standard Specification for Road Works (JKR SPJ 2008) |
| Residue by evaporation and spray rate test | Tack and prime coat checks | On request |
How It Works
Booking & Details
Send a booking with location, layer and number of cores.
Site Mobilisation
Our team comes to site to core and collect samples.
Laboratory Testing
Samples are tested in the laboratory.
Formal Reporting
You receive a formal test report.
Standards & Reporting
Testing follows Malaysian JKR specifications and standard geotechnical test methods. Final test reports are endorsed by a Professional Engineer (PEPC).
Read more in our FAQ →Related Services & Reading
Related services: All asphalt and bitumen tests, In-situ field testing.
From our Technical Journal: Marshall mix design explained, Cold In-Place Recycling (CIPR) explainer.
Frequently Asked Questions
What is a premix core test?
A cylindrical core is cut from the laid premix to check layer thickness and density against the specification.
Which tests do consultants usually ask for on road works?
Core thickness and density for laid premix; bitumen content, grading and Marshall results for the mix — as set in the contract specification.
Do you come to site in Sarawak?
Yes, our team cores on site; see service areas.
Which standards do you test to?
JKR specifications and the ASTM/BS methods listed above.
How do I book?
Use the booking form; give location, layer type and number of cores.