Abtin Pars Kia articleshttps://abtinparskia.ir/en/blog/Technical articles on construction materials and aggregatesenAggregate Moisture and Absorption: Correcting Concrete Mix Waterhttps://abtinparskia.ir/en/blog/aggregate-moisture-absorption/https://abtinparskia.ir/en/blog/aggregate-moisture-absorption/Surface moisture in sand changes the water-cement ratio. Learn the moisture states, saturated surface-dry condition and how to correct batch weights and mix water.Sat, 07 Nov 2026 00:00:00 GMTAggregate Stockpiles: How to Prevent Segregation and Contaminationhttps://abtinparskia.ir/en/blog/stockpile-segregation/https://abtinparskia.ir/en/blog/stockpile-segregation/Good material can fall out of specification in a poor stockpile. Learn why segregation happens and how to build, load and protect a stockpile.Sat, 07 Nov 2026 00:00:00 GMTAlkali-Silica Reaction in Concrete: How to Assess Aggregatehttps://abtinparskia.ir/en/blog/alkali-silica-reaction/https://abtinparskia.ir/en/blog/alkali-silica-reaction/Some siliceous aggregates react with cement alkalis and crack concrete. Learn the signs, the ASTM tests and the usual ways of managing this risk.Sat, 07 Nov 2026 00:00:00 GMTChoosing Sand for Mortar and Plaster: Cracking, Adhesion and Workabilityhttps://abtinparskia.ir/en/blog/sand-for-plaster-and-mortar/https://abtinparskia.ir/en/blog/sand-for-plaster-and-mortar/Unsuitable sand leads to cracked, detached plaster. Learn ASTM C144 limits, how fines and clay act, and how to select sand for masonry mortar and plaster.Sat, 07 Nov 2026 00:00:00 GMTConverting Tonnes and Cubic Metres: Bulk Density and Sand Bulkinghttps://abtinparskia.ir/en/blog/tonnes-and-cubic-metres/https://abtinparskia.ir/en/blog/tonnes-and-cubic-metres/The weight and volume of materials change with compaction and moisture. Learn bulk density, the bulking of damp sand and how to estimate sand and gravel quantities.Sat, 07 Nov 2026 00:00:00 GMTDrainage and Filter Materials: Selection Criteria and Terzaghi's Rulehttps://abtinparskia.ir/en/blog/drainage-filter-criteria/https://abtinparskia.ir/en/blog/drainage-filter-criteria/A drainage layer must pass water and hold back soil. Learn Terzaghi's filter criteria, material cleanliness and how to place French drains and geotextiles.Sat, 07 Nov 2026 00:00:00 GMTDust Control in Quarries and Crushing Plantshttps://abtinparskia.ir/en/blog/quarry-dust-control/https://abtinparskia.ir/en/blog/quarry-dust-control/Stone dust affects worker health and the surrounding area. Learn the main dust sources, misting and extraction, haul road control and protective equipment.Sat, 07 Nov 2026 00:00:00 GMTFines in Crushed Sand: How to Control Stone Dusthttps://abtinparskia.ir/en/blog/manufactured-sand-fines/https://abtinparskia.ir/en/blog/manufactured-sand-fines/Crushed sand carries stone dust, which is not the same as clay. Learn the ASTM C33 limit, the methylene blue test and how production controls fines.Sat, 07 Nov 2026 00:00:00 GMTFlat and Elongated Particles: Why Particle Shape Mattershttps://abtinparskia.ir/en/blog/flat-elongated-particles/https://abtinparskia.ir/en/blog/flat-elongated-particles/Flat and elongated particles reduce compaction and workability and break under load. Learn how they are measured, what they do and how production reduces them.Sat, 07 Nov 2026 00:00:00 GMTHow to Choose the Maximum Aggregate Size for Concretehttps://abtinparskia.ir/en/blog/maximum-aggregate-size-concrete/https://abtinparskia.ir/en/blog/maximum-aggregate-size-concrete/Maximum gravel size depends on member dimensions, bar spacing and placement method. Learn the common rules and how this choice affects cement use and workability.Sat, 07 Nov 2026 00:00:00 GMTHow to Read a Grading Curve: A Practical Guide for Aggregateshttps://abtinparskia.ir/en/blog/grading-curve-guide/https://abtinparskia.ir/en/blog/grading-curve-guide/A grading curve shows how particle sizes are distributed. Learn continuous, gap and uniform grading and the coefficients of uniformity and curvature.Sat, 07 Nov 2026 00:00:00 GMTMineral Filler in Asphalt: Role, Grading Limits and Dust-to-Binder Ratiohttps://abtinparskia.ir/en/blog/mineral-filler-in-asphalt/https://abtinparskia.ir/en/blog/mineral-filler-in-asphalt/Mineral filler forms a mortar with bitumen that decides asphalt stability. Learn ASTM D242 limits, the dust-to-binder ratio and how filler type affects a mix.Sat, 07 Nov 2026 00:00:00 GMTOrdering Aggregate: What Should You Tell Your Supplier?https://abtinparskia.ir/en/blog/how-to-order-aggregate/https://abtinparskia.ir/en/blog/how-to-order-aggregate/An exact order prevents rejected loads and site stoppages. A practical list of what a sand and gravel inquiry needs, from application to delivery.Sat, 07 Nov 2026 00:00:00 GMTRecycled Concrete Aggregate: Properties, Limits and Useshttps://abtinparskia.ir/en/blog/recycled-concrete-aggregate/https://abtinparskia.ir/en/blog/recycled-concrete-aggregate/Crushing old concrete reduces quarrying and waste. Learn the properties of recycled aggregate, its higher absorption, suitable uses and how to control its quality.Sat, 07 Nov 2026 00:00:00 GMTRiprap Design Basics: Stone Size, Filter Layer and Placementhttps://abtinparskia.ir/en/blog/riprap-design-basics/https://abtinparskia.ir/en/blog/riprap-design-basics/Riprap stability depends on stone size, durability and the filter layer. Learn how flow velocity relates to stone weight, what the filter does and how to place it.Sat, 07 Nov 2026 00:00:00 GMTScreening and Grading: How Aggregate Is Separated into Sizeshttps://abtinparskia.ir/en/blog/screening-basics/https://abtinparskia.ir/en/blog/screening-basics/A vibrating screen turns crusher output into separate products. Learn what affects screen efficiency, the main media types and common problems such as blinding.Sat, 07 Nov 2026 00:00:00 GMTThe Los Angeles Abrasion Test: How Well Does Rock Resist Impact and Wear?https://abtinparskia.ir/en/blog/los-angeles-abrasion-test/https://abtinparskia.ir/en/blog/los-angeles-abrasion-test/The Los Angeles test measures aggregate resistance to abrasion and impact. Learn ASTM C131 and C535, how percent loss is calculated and what it means.Sat, 07 Nov 2026 00:00:00 GMTThe Sand Equivalent Test: Method and What the Result Meanshttps://abtinparskia.ir/en/blog/sand-equivalent-test/https://abtinparskia.ir/en/blog/sand-equivalent-test/Sand equivalent shows the ratio of sand to clay-like fines by a quick method. Learn the ASTM D2419 procedure, the calculation and the limits of interpreting it.Sat, 07 Nov 2026 00:00:00 GMTTypes of Crusher: How Jaw, Cone and Impact Crushers Differhttps://abtinparskia.ir/en/blog/crusher-types/https://abtinparskia.ir/en/blog/crusher-types/Each crusher breaks rock by a different mechanism. Learn jaw, cone, impact and VSI crushers and how they affect particle shape and product grading.Sat, 07 Nov 2026 00:00:00 GMTClassifying Sand and Gravel: Types of Aggregate and How to Choosehttps://abtinparskia.ir/en/blog/sand-and-gravel-classification/https://abtinparskia.ir/en/blog/sand-and-gravel-classification/Sand and gravel are classified by size, origin and particle shape. Learn the boundary between fine and coarse aggregate and the criteria for choosing materials.Wed, 04 Nov 2026 00:00:00 GMTAggregate Quality Control Tests: What Does Each Test Show?https://abtinparskia.ir/en/blog/aggregate-quality-tests/https://abtinparskia.ir/en/blog/aggregate-quality-tests/A guide to common aggregate tests, including grading, sand equivalent, Los Angeles abrasion, soundness and absorption, and how to interpret their results.Wed, 04 Nov 2026 00:00:00 GMTAggregate Washing: Why Is Washed Material Better?https://abtinparskia.ir/en/blog/aggregate-washing/https://abtinparskia.ir/en/blog/aggregate-washing/Washing separates clay, silt and stone dust from aggregate. Learn how this stage affects concrete, what equipment is common, and how water and sludge are managed.Wed, 04 Nov 2026 00:00:00 GMTBase and Subbase: How Granular Layers Decide Pavement Lifehttps://abtinparskia.ir/en/blog/base-and-subbase/https://abtinparskia.ir/en/blog/base-and-subbase/Base and subbase layers spread traffic loads into the subgrade. Learn how the two layers differ, what their materials need and the key points of placing them.Wed, 04 Nov 2026 00:00:00 GMTChoosing Aggregate for Asphalt: Selection Criteria for Asphalt Mixeshttps://abtinparskia.ir/en/blog/aggregates-for-asphalt/https://abtinparskia.ir/en/blog/aggregates-for-asphalt/Aggregate forms the main part of an asphalt mix. Learn how fractured faces, hardness, cleanliness and adhesion to bitumen shape asphalt performance.Wed, 04 Nov 2026 00:00:00 GMTNatural Sand or Crushed Sand: Which Suits Your Project Better?https://abtinparskia.ir/en/blog/natural-vs-crushed-sand/https://abtinparskia.ir/en/blog/natural-vs-crushed-sand/Natural and crushed sand compared on particle shape, water demand, workability and strength, with selection notes for concrete, mortar and asphalt.Wed, 04 Nov 2026 00:00:00 GMTNew Directions in the Aggregates Industry: Crushed Sand, Recycling and Resource Managementhttps://abtinparskia.ir/en/blog/aggregate-industry-trends/https://abtinparskia.ir/en/blog/aggregate-industry-trends/The aggregates industry faces limited natural resources and tighter environmental rules. Review the main responses, from crushed sand to recycling and water reuse.Wed, 04 Nov 2026 00:00:00 GMTStages of Operating a Stone Quarry: From Exploration to Land Restorationhttps://abtinparskia.ir/en/blog/quarry-operation-stages/https://abtinparskia.ir/en/blog/quarry-operation-stages/Operating a stone quarry is a multi-stage process. Review exploration, planning, benched extraction, haulage and restoration of the land.Wed, 04 Nov 2026 00:00:00 GMTWhat Is the Fineness Modulus of Sand and How Is It Calculated?https://abtinparskia.ir/en/blog/fineness-modulus/https://abtinparskia.ir/en/blog/fineness-modulus/Fineness modulus is a simple indicator of how coarse or fine a sand is. See the calculation with a worked example, ASTM C33 limits and its effect on mix design.Wed, 04 Nov 2026 00:00:00 GMT