Tenders Are Invited For Delivery Of Aggregate For The Kętrzyn Commune

Broken Or Crushed Natural Aggregate. The Material Must Be Clean, Free From Clay Contamination, Clay, Humus, Wood, Plastic, Glass, Brick Rubble And Reclaimed Asphalt, Etc. Recycled Artificial Aggregates Are Not Allowed. Grain Size (Fraction): Mixture With Continuous Grain Size 0-31.5 Mm In An Amount Of 400 Tons. Grain Composition And Dust Content Tested By Sieving Must Be In Accordance With The Pn-En Standard 933-1. The Content Of The Dust Fraction (Grains < 0.063 Mm) Must Be In The Range Of 5% - 15% (Category F₁₀ Or F₁₅). Degree Of Crushing (Content Of Broken Or Crushed Grains): It Is Required To Use Coarse Aggregate Of Category C90/3 In The Mixture In Accordance With The Pn-En 933-5 Standard. At Least 90% Of The Mixtures Weight Must Be Grains With Sharp, Angular Edges Resulting From Mechanical Crushing. It Is Unacceptable To Use Smooth Pebble/Gravel Grains (Maximum 3% Of Rounded Grains). Flatness Index: Grains With A Shape Close To Regular - Fi Category ≤ 35. Resistance To Crushing: Los Angeles La Index ≤ 35 Frost Resistance And Water Absorption: Frost Resistance Category F₁ Or F₂, Water Absorption Wa₂₄ ≤ 2.0%.