How To Test The Impact Resistance Of Terrazzo Prefabricated Panels? Will Dragging Heavy Objects Cause Cracks in Terrazzo Prefabricated Panels?

Test method for impact resistance of terrazzo prefabricated panels and analysis of the influence of heavy object drag
1, Test method for impact resistance performance
The impact resistance of terrazzo prefabricated panels needs to be evaluated through standardized tests, with core testing items including flexural strength, compressive strength, and dynamic impact simulation. The specific methods are as follows:

Bending strength test
Test standard: According to the requirements of the "Compilation of Building Material Standards", use specimens cut into 150mm × 100mm, with a center distance of 100mm between supporting cylinders, and uniformly load the specimens at a speed of 30-50N/s until they break.
Result judgment: The flexural strength needs to meet the design requirements (usually ≥ 10MPa), and the minimum value of a single block should not be less than 80% of the arithmetic mean. The surface hardness of high-strength terrazzo can reach 6-8 levels, and it can withstand heavy rolling without cracking.
Compressive strength test
Test method: Use a pressure testing machine to apply a load to a standard specimen (such as a 100mm × 100mm cube), record the failure load, and calculate the compressive strength.
Data reference: The compressive strength of high-quality terrazzo can reach 30-50MPa, much higher than that of ordinary concrete (20-30MPa), ensuring its ability to withstand vertical loads.
Dynamic impact simulation (optional)
Drop hammer test: Simulate the impact of a heavy object falling, and test the degree of damage to the board surface by adjusting the weight (such as 50kg) and height (such as 1m) of the drop hammer.
Pendulum impact test: Evaluating the toughness of materials under high-speed impact, suitable for high demand scenarios such as industrial flooring.

2, The influence of heavy object dragging on terrazzo prefabricated panels
Whether dragging heavy objects causes cracking requires comprehensive analysis of material properties, construction techniques, and usage conditions:

Material performance advantages
High hardness and wear resistance: The surface hardness of terrazzo reaches 6-8 levels, with better wear resistance than ordinary floor tiles, and can withstand repeated friction from heavy objects.
Crack resistance: The cured terrazzo structure is dense, with low shrinkage deformation rate, and is not easily cracked due to local stress concentration.
Potential cracking risks and preventive measures
Grassroots issues: If the backfill soil at the grassroots level is not solid, the thickness of the cushion layer is uneven, or no steel mesh is set up, dragging heavy objects may cause reflection cracks.
Prevention: Ensure that the base layer is compacted layer by layer, the thickness of the cushion layer is uniform (≥ 50mm), and two-way steel bars (such as Φ 6 @ 200mm) are added in large areas.
Improper grid design: Narrow grid strips are prone to cracking due to concentrated shrinkage stress.
Prevention: The width of the dividing strip should be 10-15mm, with a spacing of no more than 6m, to avoid the formation of narrow and elongated areas.
Construction defects: The concealed pipeline is too high and the mortar is not tightly fixed, which may lead to local cracking.
Prevention: The thickness of the protective layer at the top of the pipeline should be ≥ 20mm, and it should be poured tightly with fine aggregate concrete.
Actual case verification
Parking Lot Application: Terrazzo flooring is widely used in heavy-duty scenarios such as parking lots and logistics warehouses due to its high surface hardness and resistance to rolling, and has not experienced cracking problems after long-term use.
Industrial flooring: In the mechanical manufacturing workshop, terrazzo prefabricated panels can withstand frequent dragging by forklifts and maintain structural integrity, proving their reliable impact resistance.

3, Conclusion and Suggestions
Impact resistance performance: Terrazzo prefabricated panels can meet the requirements of heavy-duty scenarios through bending and compressive strength testing and dynamic impact simulation, and their impact resistance performance is superior to ordinary floor tiles and concrete.
Safety of heavy object dragging: Under the premise of proper grassroots treatment, reasonable grid design, and defect free construction, heavy object dragging will not cause cracking. It is recommended to regularly check the sealing of the dividing strip and the settlement of the base layer to extend its service life.
Material selection and construction points: Prioritize the selection of high brightness and high hardness terrazzo prefabricated panels, and ensure that the construction team has professional qualifications, strictly following the "Code for Acceptance of Construction Quality of Building Ground Engineering" (GB50209) for operation.