Engineered specifically to verify binder properties under high-humidity, marine, and heavy-loading coastal environments.
Why precise bitumen dynamic evaluation is critical to Bangladesh's primary maritime corridor
As the commercial capital of Bangladesh and host to the country’s primary seaport handling over 90% of export-import trade, Chittagong (Chattogram) experiences intense structural stress on its transport networks. Major developments like the Dhaka-Chittagong Expressway, the Matarbari Deep Sea Port Access Road, the Karnaphuli River Tunnel, and the expansion of the Bay Terminal require highways that can withstand heavy-axle container vehicles.
Furthermore, Chittagong’s unique geographical position exposes its pavements to extreme tropical climates, with annual monsoonal rainfall exceeding 3,000 mm, high humidity, and rising water tables with saline intrusion. The combination of static axle loads from loaded cargo trucks and saline moisture accelerates asphalt stripping and pavement deformation (rutting). Implementing robust testing regimens utilizing equipment like the Dynamic Shear Rheometer (DSR), Wheel Tracking Test Equipment, and Pressure Aging Vessels (PAV) is crucial to ensuring durability under Local Government Engineering Department (LGED) and Roads and Highways Department (RHD) specifications.
Globally, the highway construction sector is rapidly moving away from traditional penetration testing toward Performance-Graded (PG) systems. These evaluate bitumen rheology over a spectrum of operating temperatures. Incorporating polymer-modified bitumen (PMB) and crumb rubber-modified bitumen (CRMB) requires precise laboratory testing. Zealchon supplies advanced testing instrumentation that complies with international standards such as ASTM, AASHTO, and EN, enabling laboratories in Chittagong to formulate durable asphalt mixes that withstand aging and cracking over time.
| Test Standard | Equipment Name | Primary Evaluation Metric | Significance for Chittagong Roads |
|---|---|---|---|
| AASHTO T324 / EN 12697-22 | Bitumen Wheel Tracking Tester | Rut Depth (mm) & Stripping Point | Evaluates heavy vehicle damage under high humidity/temperature |
| AASHTO T315 / ASTM D7175 | Dynamic Shear Rheometer (DSR) | Complex Shear Modulus (G*), Phase Angle | Determines high-temperature viscoelastic response and rut resistance |
| AASHTO R28 / ASTM D6521 | Pressure Aging Vessel (PAV) | Long-term physical/chemical oxidation | Simulates asphalt aging over a 7-to-10-year service life in tropical zones |
| ASTM D6925 | Gyratory Compactor | Volumetric air voids and density properties | Ensures precise mechanical interlocking of localized aggregates |
Combining high-precision CNC machining with direct logistical integration for South Asian markets
Collaborating with elite institutions like the Chang'an University Highway College, Zealchon integrates practical pavement engineering insights directly into high-precision sensor systems, filling structural testing gaps.
Our workshop features advanced CNC machining centers, milling systems, and shearing installations. This ensures that every test frame, compression plate, and shear ring satisfies tight tolerance limits.
Located in Xi'an, we coordinate container transport via primary ports, ensuring secure shipping to Chittagong Port (Oceans and Inland waterways), complete with certified customs document prep.
Xi'an Zealchon Electronic Technology Co., Ltd., with more than 15 years of civil engineering background, is located in the new technology industry development zone in Xi'an, an ancient city in China. It covers an area of 7,500 square meters of building area.
We manufacture and supply testing instruments for civil engineering, geological survey, water conservancy and hydropower, roads and bridges, highways, railways, and airports. We specialize in the production and sales of geotechnical testing instruments, asphalt and asphalt mixture testing instruments, cement and concrete testing instruments.
Zealchon is engaged in manufacturing and supplying a qualitative array of research and laboratory testing equipment. Zealchon specializes in civil engineering research and experimental apparatus, as well as semiconductor laser research and development. Our range includes research lab instruments, soil testing instruments, bitumen testing instruments, and cement & concrete testing equipment.
Continuous investment in engineering precision, academic synergy, and global equipment deployment
Our production workshop has advanced manufacturing equipment, including machining centers, CNC lathes, milling machines, planers, grinders, shearing machines, bending machines, electric welders, and argon arc welders.
Under the guidance and cooperation of many professors and researchers from Chang'an University Highway College, Air Force Engineering University, and Xi'an University of Technology, we introduced technology to develop a series of professional and core technology testing instruments for asphalt and asphalt mixture, pavement, bridge deck, geotechnical, and structural testing. Some of these products fill the gaps in similar instruments and have won ministerial and provincial awards.
Currently based on civil experimental instrument research, the research team is founded by personnel from Chang'an University, Xi'an Polytechnic University, and Xi'an Petroleum University, ensuring industry-leading technology and expertise.
Our research and development team has designed systems that meet leading domestic and international standards. Our equipment for asphalt, road, bridge deck, geotechnical, and structural testing has won national, ministerial, and provincial awards.
Our machines are used worldwide by government agencies, commercial testing laboratories, ready-mix producers, contractors, and universities. Over the past 15 years, our customers have recognized our dedication to quality products, performance, value, and customer satisfaction, which has become the cornerstone of our success and growth.
Configuring laboratories to match specific structural and climatic projects across Chittagong Division
Challenge: Slow-moving, heavy container vehicles (up to 44 tons) causing severe wheel rutting.
Solution: Apply Bitumen Wheel Tracking Equipment to design high-modulus asphalt concrete (HMAC) that resists deformation under continuous loading.
Challenge: High salinity, tidal washouts, and UV aging accelerating binder degradation.
Solution: Deploy Rolling Thin Film Ovens (RTFO) and Ductilometers to simulate aging and monitor tensile properties, ensuring resistance to cracking.
Challenge: Vibration, structural deflection, and temperature variations on steel orthotropic bridge decks.
Solution: Utilize Bending Beam Rheometers (BBR) and Tensile Fracture Performance Testers to evaluate binder elasticity at structural interfaces.
Full inventory of asphalt, aggregate, and binder testing instruments optimized for Chittagong contractors
Committed to quality control, corporate value, and professional service
The company keeps up with the pace of national standards, ministerial standards, and industry standards testing, and has a production and sales service mechanism. The products are deeply trusted by user units.
The company adheres to the corporate spirit of "people-oriented, unity and cooperation, pursuit of excellence, and excellence", adheres to the corporate purpose of "quality first, honesty and trustworthiness, and customer first", and establishes the business philosophy of "everything is based on customer needs as the working goal".
Quickly grows into a technology-based professional enterprise, providing the market with high-quality products and providing customers with professional services. The company promises to provide three guarantees for all products sold, craftsman spirit, and professional service!
Expert technical answers regarding compliance, calibration, and procurement for Chittagong laboratories
Zealchon Electronic
