Description

Introduction Digital Unconfined Compression Testing Machine

The Unconfined Compression Testing stands as one of the most dependable and accurate instruments for determining the unconfined compressive strength Digital Unconfined Compression Testing Machine of cohesive soil specimens in geotechnical laboratories. This machine combines a motorized loading frame with a digital measurement system to deliver fast, Digital Unconfined Compression Testing Machine repeatable, and standard-compliant UCS test results. Civil engineers, geotechnical consultants, and soil testing laboratory professionals across Bangladesh rely on this equipment to generate the critical strength data that drives safe foundation, road, embankment, and dam design decisions. The Unconfined Compression Testing OBRK Model YYW brings together robust construction, digital precision, and ease of use in a single compact instrument built for daily laboratory demands.

Specifications Digital Unconfined Compression Testing Machine

Specification	Details
Brand	OBRK
Model	YYW
Test Method	Unconfined Compressive Strength (UCS)
Maximum Load Capacity	10 kN
Load Measurement System	Digital Load Cell
Deformation Measurement	Digital Dial Gauge / LVDT
Load Display Resolution	0.01 N
Deformation Resolution	0.01 mm
Compression Speed Range	0.5 – 12 mm/min (adjustable)
Standard Strain Rate	1 – 3% per minute
Drive Mechanism	Variable-speed electric motor with manual handwheel
Motor Power Rating	~40 W
Sample Diameter	38 mm / 50 mm / 75 mm
Sample Height-to-Diameter Ratio	2:1 (standard)
Display Type	Digital LCD (simultaneous load & deformation)
Data Output Port	USB / RS-232
Frame Material	Heavy-duty anti-corrosion coated steel
Power Supply	AC 220V, 50Hz
Machine Dimensions	Approx. 400 × 300 × 600 mm
Machine Weight	Approx. 40 kg
Standards Compliance	ASTM D2166, BS 1377 Part 7, IS 2720 Part 10
Country of Origin	China

 

Key Features Digital Unconfined Compression Testing Machine

• Precision Digital Load Cell — The load cell measures compressive force at 0.01 N resolution, giving engineers highly accurate and reproducible UCS values across every test cycle.
• Variable-Speed Motorized Drive — The electric motor maintains a consistent, adjustable compression rate between 0.5 and 12 mm/min, fully satisfying ASTM D2166 and BS 1377 strain rate requirements Digital Unconfined Compression Testing Machine.
• Simultaneous LCD Readout — The digital display shows real-time load and axial deformation values at the same time, allowing the operator to track specimen failure behavior without switching screens.
• PC Data Connectivity — The USB and RS-232 ports allow direct connection to a laboratory computer for real-time data logging, stress-strain curve plotting, and digital report generation.
• Manual Handwheel Override — The handwheel gives the operator full manual control for specimen positioning and fine load adjustment independent of the motor drive system Digital Unconfined Compression Testing Machine.
• Multi-Size Sample Compatibility — The machine accepts 38 mm, 50 mm, and 75 mm diameter specimens, covering all standard Shelby tube and compaction mold sizes used in Bangladeshi laboratories Digital Unconfined Compression Testing Machine.
• Heavy-Duty Steel Frame — The anti-corrosion coated steel frame maintains rigid alignment under maximum load and withstands the demands of high-frequency daily testing without deflection Digital Unconfined Compression Testing Machine.

 

Applications Digital Unconfined Compression Testing Machine

• • Building foundation design — generating UCS data to calculate undrained shear strength and safe bearing capacity for residential, commercial, and industrial structures
  • Road subgrade assessment — evaluating cohesive subgrade soil strength for pavement thickness design on national highways, local roads, and urban streets
  • Embankment and flood protection design — testing fill soil compressive strength for slope stability analysis on river embankments and flood protection berms
  • Dam and reservoir engineering — assessing impervious core and shoulder fill material strength in earth dam construction
  • Geotechnical site investigation reports — providing certified UCS test data required by BNBC, ASTM, and BS standards for project approvals
  • University soil mechanics teaching laboratories — conducting standard UCS experiments for undergraduate and postgraduate civil engineering students
  • Construction quality control — verifying compacted fill layer strength during earthworks construction supervision
  • LGED, RHD, and BWDB infrastructure projects — supporting soil strength documentation for government-funded road, flood protection, and water infrastructure development

 

Who Uses This

• Geotechnical engineers at consulting firms conducting soil investigations for construction projects across Digital Unconfined Compression Testing Machine Bangladesh
• Civil engineering departments at BUET, KUET, RUET, CUET, DUET, and private universities running soil mechanics laboratory programs
• Government testing institutions including BRRL, LGED, RHD, and BWDB soil testing units Digital Unconfined Compression Testing Machine
• Private soil testing laboratories serving developers, contractors, and engineering consultants in Dhaka, Chittagong, and other major cities
• Construction company quality control teams monitoring fill compaction standards on active construction sites
• Geotechnical research scholars working on soft soil improvement, ground stabilization, and foundation behavior studies
• Polytechnic institutes providing hands-on soil testing training to civil technology diploma students
• Buying agents and procurement officers at engineering procurement companies supplying laboratory equipment to institutions

Frequently Asked Questions (FAQ) Digital Unconfined Compression Testing Machine

Q1: What does the Unconfined Compression Test actually measure? The test measures the maximum axial compressive load a cohesive soil specimen can sustain without lateral confinement. Engineers use this maximum load value to calculate the unconfined compressive strength (qu) and derive the undrained shear strength (Su = qu/2) for foundation and slope design.

Q2: Which soil types work with the OBRK YYW machine? The machine tests cohesive soils including soft clay, medium clay, stiff clay, silty clay, and clayey silt. It does not suit cohesionless soils like sand or gravel because those soils cannot maintain a self-standing cylindrical specimen without lateral support.

Q3: Does this machine meet ASTM D2166 requirements? Yes. The motorized drive delivers the 1–3% per minute strain rate that ASTM D2166 specifies. The digital load cell and deformation gauge meet the accuracy and resolution requirements of both ASTM D2166 and BS 1377 Part 7.

Q4: How does the PC data output work? The machine transmits real-time load and deformation readings through the USB or RS-232 port to a connected computer. Compatible data acquisition software records the values, plots the stress-strain curve automatically, and generates a formatted test report for laboratory records and client submissions.

Q5: What sample preparation equipment do we need alongside this machine? Laboratories typically need a soil lathe or wire saw to trim Shelby tube samples, a vernier caliper for specimen dimension measurement, a moisture content balance, and a sample extruder. astzbd can supply these accessories alongside the YYW machine.

Q6: What power supply does the machine need in Bangladesh? The machine operates on standard AC 220V, 50Hz single-phase power, which matches the electrical supply available in all Bangladeshi laboratories, universities, and testing facilities without any additional transformer or converter.

 

Why Buy From astzbd Digital Unconfined Compression Testing Machine

• Authentic OBRK Instruments — astzbd sources the YYW machine directly from verified OBRK distributors and supplies genuine laboratory-grade equipment without substitution or downgrade.
• Expert Pre-Sales Technical Advice — The astzbd engineering team reviews each customer’s testing requirements and recommends the right model configuration before the purchase decision.
• Calibration Certificate with Every Unit — astzbd includes a factory calibration certificate with each machine, supporting laboratory quality management and accreditation processes.
• Nationwide Delivery Coverage — astzbd delivers heavy laboratory equipment to all 64 districts of Bangladesh through a reliable freight network, covering Dhaka, Chittagong, Sylhet, Rajshahi, Khulna, Barisal, and all regional centers.
•  Installation and Commissioning Assistance — astzbd arranges on-site setup support and initial operational verification so the machine enters service correctly from the first day.
• After-Sales Service and Spare Parts — astzbd maintains after-sales support and spare part availability for OBRK instruments so customers can keep their equipment in service long-term.
• Trusted by Leading Institutions — Engineering faculties, government laboratories, and private testing firms across Bangladesh already depend on astzbd as their primary laboratory equipment supplier.