How To Conduct Quality Inspection in The Production Of Prefabricated Terrazzo?

In the production process of prefabricated terrazzo, quality inspection is a key link to ensure that the product meets design requirements and performance. Quality testing covers multiple stages such as raw materials, production processes, and finished products. The following are specific testing contents and methods:

1, Raw material quality inspection

cement

Testing items: strength level, stability, and setting time.

Testing method: Conduct physical performance tests according to national standards (such as GB 175) to ensure stable cement quality.

Gravel or debris

Testing items: particle size distribution, mud content, crushing value.

Detection method: Determine the grading through screening test, and detect the impurity content through mud content test.

paint

Testing items: light resistance, weather resistance, compatibility with cement.

Testing method: Conduct accelerated weather resistance test, observe color changes, and ensure long-term use without fading.

Glass strips, dividing strips

Testing items: appearance quality, dimensional deviation, alkali resistance.

Testing method: Check whether the surface is flat and free of cracks, measure whether the dimensions meet the requirements, and test the durability in alkaline environment.

2, Production process quality inspection

Ingredients and Mixing

Testing items: accuracy of mix proportion, mixing time.

Testing method: Regularly check the amount of raw materials used to ensure compliance with the design mix ratio; Observe the mixing status to ensure even mixing.

forming

Testing items: compaction density and surface smoothness.

Testing method: Use a small hammer to lightly tap and check for hollowing, and measure the surface flatness with a 2m ruler and a feeler gauge.

maintain

Testing items: maintenance temperature, humidity, and time.

Testing method: Set up a temperature and humidity recorder to ensure that the maintenance conditions meet the requirements and the maintenance time is not less than the specified number of days.

3, Finished product quality inspection

appearance quality

Testing items: surface flatness, color uniformity, cracks, missing edges and corners.

Testing method:

Surface flatness: Check with a 2m ruler and wedge-shaped feeler gauge, and the deviation should not exceed the specified value (such as 2mm).

Color uniformity: visually inspected under natural light, with no significant color difference.

Cracks, missing edges and corners: visual and tactile inspection, record the number and size of defects.

Dimensional deviation

Testing items: length, width, thickness, diagonal difference.

Testing method: Measure with steel tape, vernier caliper and other tools, and the deviation should meet the standard requirements (such as thickness deviation ± 1mm).

Physical and mechanical properties

Testing items: compressive strength, flexural strength, water absorption, wear resistance.

Testing method:

Compressive strength and flexural strength: Prepare specimens according to GB/T 17671 standard and conduct compressive and flexural tests.

Water absorption rate: Soak the specimen in water for 24 hours and measure the mass change before and after water absorption.

Wear resistance: Using a wear testing machine to measure the amount of wear per unit area.

durability

Testing items: frost resistance, pollution resistance, chemical corrosion resistance.

Testing method:

Frost resistance: Conduct freeze-thaw cycle tests to observe whether the surface peels off or cracks.

Pollution resistance: Apply common pollutants (such as coffee, ink) to the surface and observe whether it is easy to clean.

Chemical corrosion resistance: Soak the specimen in acid or alkali solution and measure the mass loss and strength change.

4, Testing process and records

sample method

Sample according to GB/T 2828.1 standard to ensure representativeness of the sample.

Detection frequency

Raw materials: tested upon arrival of each batch.

Production process: At least one inspection per shift.

Finished products: Each batch of products is sampled and tested proportionally.

Record and report

Detailed record of testing data, including testing items, methods, results, testing personnel, and other information.

Generate inspection reports and propose corrective measures for non-conforming items.

5, Handling of non-conforming products

Identification and isolation

Clearly label non-conforming products to prevent misuse and store them in isolation.

cause analysis

Analyze the reasons for non conformance from the aspects of raw materials, production processes, equipment, etc.

Rectification and re inspection

Take corrective measures based on the reasons, such as adjusting the mix proportion, replacing raw materials, repairing equipment, etc.

After rectification and retesting, it can only be shipped after passing the inspection.

6, Summary

The quality inspection of prefabricated terrazzo is a systematic process that involves multiple links such as raw materials, production process, and finished products. Through strict testing processes and standards, the quality of prefabricated terrazzo can be ensured to meet design requirements and performance, providing users with high-quality products.