« Material Testing

Concrete, Masonry and Aggregate

In this section performed different tests in concrete, Aggregate and chemical admixtures using destructive and nondestructive methods, The tests that are performed such as sand equivalent for sand, sieve analysis for fine and coarse aggregate , clay lumps , abrasion degradation of aggregate, water absorption and density of aggregate, alkali reaction of aggregate , density of chemical admixtures , PH-Value of admixture, solid content in chemical admixtures, setting time of concrete, slump test , compressive strength test , cement content test , air content test, core test ,V- Funnel ,U-BOX ,J-Ring ,L-box for self-compacting concrete, ultrasonic, Ferro scan, cracks and other non-destructive tests
Tests for Precast concrete – Kerb stone, Interlocks & Blocks dimensions, density, compressive and flexural strengths

CONCRETE TESTING
• Concrete Mix Design, BS -125 & BSEN 12350
• Trial mix verification, BS – 125
• Fresh Density, Setting Time, Air Voids & Bleeding, BS – 125
• Cube compressive Strength 10*10 cm, P.S.55, 1,4-2015
• Slump Test, BS – 1881& P102 – PS 55-1 to 4 -2015
• Slump-flow by Abrams cone- For self-compacting concrete, ASTM E494-05
• V-funnel Filling ability- For self-compacting concrete, BSEN 12350
• V-funnel at T5minutes Segregation resistance, BSEN 12350
• L-box Passing ability- For self-compacting concrete, BSEN 12350
• U-box- For self-compacting concrete, BSEN 12350
• Loading test, BS1881 P202
• Rebound Number of Hardened Concrete-Schmitt Hammer, ASTM –C 805
• Pulse Velocity through Concrete –Ultrasonic Test, ASTM C 1084
• Ferro scan survey test to assess the steel reinforcement in concrete structures, BS 1881-Part 204
• Determination of location and extent of concrete cracking, ACI 224-1R
• Cracks in Concrete Structure (hand-held microscope & Mounted Monitor), ACI 224-1R
• Hidden Moisture and Intrusion in concrete structures using infrared Camera, ACI 224-1R
• Temperature and Humidity Test, ACI 224-1R
• Corrosion potential-Half Cell Potential Meter, ACI 224-1R
• Carbonation of Concrete (in situ test using Phenolphthalein Solution., ASTM C1585
• Density, Absorption, and Voids in Hardened Concrete, ASTM C 597
• Water penetration for hardened concrete, BS EN 12390-8
• Potential Alkali Reactivity of Carbonate Rocks as Concrete Aggregates, ASTM C586
• Rendering & Plastering Mortar –Compressive strength, BS EN 998-1
• Hardened Concrete Core Test, P.S.55, 6 -2015 – ASTM C 42 -2020

Development of self-compacting concrete

The development and use of self-adhesive concrete for the first time in Palestine was in 2015 by GMT center using local raw materials. This type of concrete is one of the modern applications in concrete technology. It is widely used in developed countries SCC be defined as a fresh concrete which possesses superior flow ability under maintained stability (i.e. no segregation), thus allowing self-compaction that is, material consolidation without addition of energy three properties that characterize a concrete as self-compacting are: –
• Flowing ability—the ability to completely fill all areas and corners of the formwork into which it is placed.
• Passing ability—the ability to pass through congested reinforcement without separation of the constituents or blocking.
• Resistance to segregation—the ability to retain the coarse components of the mix in suspension in order to maintain a homogeneous material

AGGREGATE TESTING

• Sieve Analysis Coarse, Fine aggregate., ASTM- C136-2019
• Sand Equivalent, ASTM – D 2419-2014
• Elongation Index, BS 812
• Flakiness Index, BS 812
• Organic Impurities, ASTM 
• Clay Lumps, ASTM – C 142
• Los Angeles Abrasion Resistance., ASTM – C131
• Soundness, ASTM – C88
• Ten Percent Fine, BS 812
• Aggregate Crushing Value, BS 812
• Specific Gravity and Absorption, ASTM – C127-2015
• Specific Gravity and Absorption, ASTM – C128-2015
• Bulk density, ASTM – C127& C128-2015
• Moisture Content, BS 812 – P109
• Chloride Content & Sulphate Content, BS 812
• Potential Reactivity, BS 812