CBR Test Lab — Certified California Bearing Ratio Reports
NABL Accredited Laboratory (Certificate No. TC-12176) as per ISO/IEC 17025:2017
Your pavement design is ready. However, your consultant is asking for a certified CBR report. Jancy Labs is a professional CBR test lab delivering California Bearing Ratio reports as per IS 2720 Part 16 — every report signed by a qualified engineer and accepted by all government departments.
Your Project Is Waiting — Get Your CBR Report Today
Your pavement design is ready. However, your consultant is asking for a certified CBR report. Jancy Labs is a professional CBR test lab delivering California Bearing Ratio reports as per IS 2720 Part 16. Furthermore, every report is signed by a qualified engineer and accepted by all government departments. Get your CBR test done today →
What is the CBR Test?
The CBR test tells you the load-bearing strength of your subgrade soil — the critical value you need for pavement design. Furthermore, your CBR value directly determines the thickness of your road's base, sub-base, and surface layers. Therefore, an inaccurate CBR value leads to premature pavement failure, costly rework, or outright rejection by your approving authority.
Applicable Standards for California Bearing Ratio Testing
Jancy Labs conducts every California Bearing Ratio test strictly as per the following standards:
IS 2720 Part 16: 1987
Primary Indian standard for laboratory CBR testing. Following the correct standard ensures your CBR report is valid, defensible, and accepted without question.
Standard Referenced on Every Report
Therefore, Jancy Labs references the applicable standard explicitly on every single report — so your submission is defensible at every technical review stage.
Why the CBR Test Matters for Your Road Project
- PWD approval — Tamil Nadu PWD requires a certified CBR report before accepting any pavement design submission.
- IRC:37 flexible pavement design — Mandatory Indian standard requiring CBR values for all road design.
- NHAI & PMGSY compliance — Highway and rural road projects require CBR testing at defined intervals.
- Southern Railway & AAI — Rail yard and airport pavement projects require CBR data for subgrade assessment.
- Pavement cost control — Accurate CBR prevents over-designing layers, saving significant project costs.
- Legal protection — Documented CBR results protect you if pavement performance disputes arise.
⚠️ Skipping or estimating CBR values almost always causes regulatory rejection and delays your entire project timeline. View all soil testing services →
Why Choose Jancy Labs for CBR Testing?
When your road project depends on one number — the CBR value — you cannot afford an unreliable lab. Furthermore, Jancy Labs has the right equipment, the right engineers, and the right process for accurate CBR testing.
- Calibrated CBR loading frame and penetration plunger — valid calibration certificates available.
- California Bearing Ratio test conducted strictly as per IS 2720 Part 16 — no shortcuts.
- CBR reports signed by qualified engineers with designation and lab stamp.
- Reports accepted by Tamil Nadu PWD, NHAI, PMGSY, Southern Railway, and AAI.
- Handles both soaked and unsoaked CBR testing as required by your project specification.
- Trusted for CBR testing by highway contractors and road project managers across Tamil Nadu.
Jancy Labs is committed to accuracy, speed, and reports that clear regulatory scrutiny first time. Know about us → · NABL Accreditation details →
How to Get Your CBR Test Done at Jancy Labs
Send Your Sample
Collect, pack, and dispatch your disturbed soil sample following the specifications below — moisture preservation is critical for accurate results.
We Test It
Your sample is registered, labelled, and assigned a unique test ID on arrival. Our engineers conduct every step of IS 2720 Part 16 — from sieving and compaction through soaking and penetration testing. All data is personally reviewed by a qualified engineer before any result is recorded.
You Receive Your Certified CBR Report
Digital copy by email for instant access; physical copy couriered on request. Accepted by PWD, NHAI, PMGSY, Southern Railway, and AAI.
Sample Quantity Required
- Minimum 35 kg disturbed soil for a standard CBR test
- Additional 5–10 kg if soaked CBR test required
- Collect from proposed subgrade level — 500 mm below formation level
- Remove all particles coarser than 19 mm before packing
How to Collect and Pack
- Place soil in heavy-duty airtight polythene bag
- Seal tightly — moisture preservation is critical for accurate results
- Double bag for protection during transit
- Label outer bag clearly with permanent waterproof marker
- Undisturbed samples — use sealed PVC tubes, waxed at both ends
What to Include With Your Sample
- Project name and full site address
- Company name and direct contact number
- Sample ID, collection point, and depth below ground
- Date of sample collection
- Test type — soaked CBR or unsoaked CBR
- Consultant specifications or contract reference if applicable
How to Dispatch
- Courier / Transport to Jancy Labs, No.6 Ganesh Nagar 3rd Street, Surya Nagar, Alagarkoil Mainroad, Madurai-625007
- Direct drop-in during working hours 10AM to 6PM
- WhatsApp tracking number to +91-9994421275
Your CBR Report from Jancy Labs Includes
- Sample identification and full project reference
- Test standard: IS 2720 Part 16: 1987
- Compaction details — moisture content and dry density
- CBR value
- Soaking period (soaked CBR test)
- Authorised engineer's signature, designation, lab stamp
- Official date of testing and report issue
- Sample receipt and logging — Sample ID assigned, condition and quantity recorded.
- Sieve check — Material above 20 mm removed per IS 2720 Part 16 requirement.
- Moisture content determination — Natural moisture content of received sample measured.
- Proctor compaction — Soil compacted at OMC to required density in 150 mm CBR mould.
- Soaking (soaked CBR) — Sample submerged for 96 hours with surcharge weight applied; swell recorded daily.
- Penetration test — Plunger advanced at 1.25 mm/min; load recorded at standard intervals per IS 2720 Part 16.
- CBR value calculation — Load-penetration curve plotted; CBR calculated at 2.5 mm and 5.0 mm.
- Report preparation and sign-off — Results reviewed and certified report issued.
Frequently Asked Questions
How long does a CBR test take at Jancy Labs?
Can I send soil samples for CBR testing by courier to Jancy Labs?
Is your CBR test report accepted by Tamil Nadu PWD?
Do you conduct both soaked and unsoaked CBR tests?
How much soil do I need to send for a CBR test?
Contact Jancy Labs — Get Your CBR Report
Submit your sample today and receive a certified CBR report that PWD, NHAI, PMGSY, Southern Railway, and AAI will accept — first time, every time.
| Channel | Detail |
|---|---|
| 📞 Call | 8680049004 / 9994421275 |
| 8680049004 | |
| ✉️ Email | jancylabsmdu@gmail.com |
| 📍 Visit | Jancy Labs, No.6 Ganesh Nagar 3rd Street, Surya Nagar, Alagar Koil Mainroad, Madurai-07 |
| 🕐 Hours | Monday to Saturday | 10:00 AM – 6:00 PM |
Request Your CBR Test
Leave your details and our team will call you back to confirm sample dispatch and turnaround.