|
Fine Sand - Supply Of Fine Sand, Made Up Of Natural Or Artificial Fine Aggregate, Originating From Crushing Or Extraction Processes, Predominantly Composed Of Mineral Particles With A Size Of Less Than 4.8 Mm, Intended For Use In Civil Construction Works, Urban Maintenance And Paving Services. The Fine Sand Must Have Uniform Grain Size, With A Predominance Of Small Diameter Particles, Falling Within The Range Of Fine Sand In Accordance With Applicable Technical Standards, Providing Good Workability And Finishing In Services Such As Laying, Coverings, Grouting, Leveling And Mixing With Cement And Other Binders. The Material Must Be:•Clean, Free From Impurities, Such As Organic Matter, Clay, Excess Silt, Roots Or Debris; •With Low Presence Of Harmful Powdery Materials; •With Resistant, Durable And Stable Grains; •Suitable For Use In Mortars And Finishing Services. When Required, It Must Meet The Technical Parameters Established In Standards Such As Granulometry, Fineness Modulus, Sand Equivalent And Impurity Content, Guaranteeing Adequate Performance In The Intended Applications. The Fine Sand Will Be Used In: • Preparation Of Mortars; •Bricklaying; •Coatings And Finishes; •Surface Regularization; •General Maintenance Services. The Supply Will Be Carried Out In Installments, According To The Demand Of The Consortium Municipalities, With Delivery Directly To The Construction Sites, Previously Indicated By The Contracting Party. The Contractor Will Be Responsible For Loading, Transporting And Unloading The Material, Ensuring Quality And Integrity Until The Final Destination, As Well As Compliance With Established Deadlines. The Material Must Meet The Current Technical Standards Applicable To Fine Aggregates For Civil Construction, Ensuring Quality, Efficiency And Durability In Public Works. The Medium Sand Must Have A Continuous And Well-Distributed Particle Size, With A Fineness Modulus Generally Between 2.0 And 3.0, In Accordance With Applicable Technical Standards, Guaranteeing Adequate Workability, Resistance And Performance In The Mixtures. The Material Must Be:•Clean, Roots Or Debris; •With Low Content Of Harmful Powdery Materials; •With Resistant, Durable And Stable Grains; •With Good Granulometric Distribution, Favoring Compaction And Mechanical Resistance. Medium Sand Is Recommended For:•Production Of Non-Structural And Structural Concrete (When Standards Are Met); •Preparation Of Laying And Coating Mortars; •Execution Of Subfloors And Regularizations; •Paving And Road Maintenance Services; •Mixes With Cement And Other Binders. When Required, It Must Meet The Technical Parameters Set Out In Applicable Standards, Including Particle Size Tests, Sand Equivalent, Impurity Content And Other Technological Controls. The Supply Will Be Carried Out In Installments, Guaranteeing Its Integrity And Quality Until The Final Destination, Durability And Adequate Performance In Public Works., Coarse Sand - Supply Of Coarse Sand, Presenting Higher Granulometry In Relation To Medium And Fine Sand, Paving And Infrastructure. The Coarse Sand Should Present Continuous Granulometry, With A Predominance Of
|
