On July 29th, the Quangong Machinery Co.,Ltd laboratory center received another batch of samples from an overseas customer: demolition concrete, steelmaking dust, and mining tailings—a total of three types, totaling 60 kg. Technicians, as usual, registered, dried, screened, and tested for activity, preparing for the next round of mix verification.
This scenario plays out daily at the Quangong laboratory center. Since the implementation of the revised "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Wastes" in September 2020, Quangong has incorporated "solid waste reduction and resource utilization" into its daily R&D processes. Over the past three years, it has continuously accumulated brick-making experimental data on solid wastes from different regions and compositions, providing tailor-made brick/block formulas for domestic and overseas customers.
• Over 300 types of solid waste samples have been collected, covering typical categories such as construction waste, steel slag, mining slag, waste ceramics, and incineration bottom ash.
• Each type of solid waste undergoes an average of 30-40 gradient tests, recording properties such as compressive strength, freeze-thaw performance, water absorption, and permeability.
• The laboratory center can issue a "Solid Waste Brick Making Technology Report" to directly meet customer-site raw material, product standards, and production capacity requirements.
What customers care about is what the laboratory center verifies.
Compressive Strength: Adjustable MU10-MU40;
Freeze-thaw Cycles: F25-F100, adapted to regional climate;
Water Permeability: Permeable Brick Coefficient ≥ 1.0×10⁻² cm/s;
Environmental Indicators: Heavy metal leaching and radioactivity meet the requirements of GB 6566 and HJ 557.
In 2024, a Shandong customer used local iron ore tailings and, using Quangong's blending solution, produced MU15 standard bricks. The tailings content reached 45%, reducing the cost per brick by 18%.
In early 2025, a Qatari customer blended incineration bottom ash with desert fine sand. The laboratory adjusted the active activator dosage, achieving a stable 28-day strength of over 12 MPa, meeting local specifications for non-load-bearing masonry blocks.
The head of the Quanzhou Engineering Experimental Center said, "We don't prejudge conclusions, we only record data. Customers send us their solid waste, and we turn it into usable bricks."
Right now, the laboratory continues to operate non-stop—another batch of steel slag samples has just been fed into the grinder. Amid the roar of the machines, solid waste is being transformed into a resource.
