There are certain methods to judge the quality of sintered bricks. Just like a traditional Chinese medicine doctor diagnoses a disease, it is necessary to use the methods of "observing, listening, inquiring and touching", which simply means "checking" the appearance, "listening" to the sound, "inquiring" about the data and "checking the interior" by cutting.
1.Observing: High - quality sintered bricks have a regular appearance with distinct edges and corners, and their dimensions are standard without errors. There are no chipped corners, broken edges, cracks, bending deformations, over - burning or flowing - off phenomena. Otherwise, they are unqualified inferior products. In addition, check the color. The color of the finished bricks is determined by the content of iron red powder in the raw materials of sintered bricks. It varies from light yellow to dark red. No matter how the color changes, the bricks in a single batch should have the same color.
2.Listening: When high - quality sintered bricks are gently knocked, they should make a clear and crisp sound, like knocking on a drum or hitting jade, which is vivid and pleasant to hear, indicating high hardness and good quality. Inferior bricks make a dull sound, and the sound of cracked or loose bricks is hoarse, like knocking on a broken gong.
3.Inquiring: Ask the manufacturer for test data, quality certificates, inquire about whether the manufacturer's production process is standardized, understand the manufacturer's reputation and credibility, and ask the manufacturer for qualification marks.
4.Touching: Break a few sample bricks to check whether the interior is fully burned. High - quality sintered bricks are consistent inside and outside, without black cores or under - burning phenomena. Finally, for high - quality sintered bricks, when water is dropped on them, it seeps in slowly. Because of their high density, their water permeability is low. Inferior bricks have large voids, so water seeps in quickly and their compressive strength is low.
The best way is to send the bricks to a testing institution to check whether their compressive strength and flexural strength meet or exceed the corresponding standards.
Post time: May-09-2025