Beyond Waste: Unlocking the Value of Crusher Stone Screenings

Хэдэн арван жилийн турш, the fine material generated during rock crushing operations – often dismissively termed "crusher waste," "ил уурхайн тоос," эсвэл зүгээр л "дэлгэцний зүйл" – was viewed as an inconvenient byproduct. Mountains of this granular material accumulated at quarries and crusher sites, representing lost resources and potential environmental liabilities. Гэхдээ, a significant shift is underway. The construction industry is increasingly recognizing that these screenings are not waste at all, but a versatile and valuable resource capable of driving sustainability and cost-efficiency across numerous applications.

Understanding Crusher Stone Screenings

Screenings are the finely crushed stone particles produced when larger rocks (шохойн чулуу шиг, боржин чулуу, урхи чулуу, or gravel) are processed through primary and secondary crushers and then screened. Typically passing through a 3/8-inch (9.5мм) or 1/4-inch (6.3мм) саад болох, and often including a significant portion of material finer than the No. 4 (4.75мм) sieve down to dust, screenings possess unique characteristics:

Ангис хуудас: Primarily fine particles with minimal coarse aggregate.
Хэлбэр: Angular particles resulting from mechanical crushing, offering excellent interlock potential.
Загвар: Mineralogically identical to the parent rock source.
Чийг агууламж: Can vary significantly depending on processing and storage conditions.

Moving Beyond "Хог хаягдал": Хэрэгжүүлэх

The true value of screenings lies in their diverse functional uses:

1. Замын Засгийн & Sub-base Stabilization: Screenings excel as a stabilizing agent for road bases and sub-bases. Their angular shape locks together effectively under compaction, creating a dense, stable foundation layer that resists deformation under traffic loads. They can be used alone or blended with coarser aggregates to achieve optimal density and drainage characteristics for specific project requirements.
2. Utility & Хоолой ор хөнжил / Буцааж дүүргэх: The controlled gradation and compactability make screenings ideal for bedding around pipes (ус, sewer, ус зайлуулах хоолой). They provide uniform support, minimize point loading on the pipe, facilitate proper alignment during installation, and allow for effective compaction around the haunches to prevent future settlement. As trench backfill material above bedding layers, they offer excellent compaction properties.
3. Paver Base & Joint Filling: For interlocking concrete pavers or segmental retaining walls (SRWs), screenings are a preferred base material due to their ability to be screeded perfectly flat and compact