JAZAN UNIVERSITY. CIVIL ENGINEERING DEPARTMENT Equipments and Devices of the Concrete Laboratory

Transcription

1 JAZAN UNIVERSITY College of Engineering CIVIL ENGINEERING DEPARTMENT Equipments and Devices of the Concrete Laboratory The Equipment The Purpose To determination of compressive strength of samples Bricks, cement & gypsum pastes, and concrete specimens (cube, cylinder etc.). It consists of applying a compressive axial load to molded cubes at a rate that is within a prescribed range until failure occurs Concrete Compression Machine (3000 KN) Machine of Steel Tensile Test: (100 KN) The primary use of the testing machine is to create the stress-strain diagram. Tensile test determines the strength of the material subjected to a simple stretching operation. The objective of this lab experiments is to incrementally the load a steel bar until failure. Then based on the collected the data, determine: -Modulus of Elasticity of Steel E steel & Compare it to the theoretical value. -Yield strength of Steel σ yield -Ultimate strength of steel σ Ultimate -Plot Stress Vs. Strain Curve for steel

2 To obtain laboratory samples of aggregates from stockpiles, by split samples of aggregate random Reducing Field Sample apparatus This test method covers test sizes of coarse for resistance to degradation using the Los Angeles testing machine, also it used to calculate abrasion of coarse aggregate. Los Angeles Machine

3 To determination of particle size distribution of coarse and fine aggregates by sieving or screening and determination the fineness of hydraulic cement by No.100 or No. 200 Sieve A Mechanical Sieve Shaker This method of test covers the procedure for determining the aggregate crushing value of coarse aggregate Aggregate Crushing Test Apparatus

4 This test method covers the determination of unit weight in a compacted or loose condition and calculation of voids in Concrete or fine and coarse aggregates. Unit Weight Measures Laboratory oven is convection appliances for general purposes. Applications include sterilization, experiment management, drying, processing, and testing of concrete, soil, bricks and aggregate samples and maintains temperature over the range of 40 to 250deg C in accordance with most BS and ASTM requirements. Laboratory oven

5 The apparatus is used for determining the fineness of cement in terms of specific surface expressed as total surface area in square centimeters per gram of cement. Blaine Air Permeability Apparatus Vicat's Apparatusiss used to find out the consistency, initial setting time and final setting time of the cement. Vicat's Apparatus

6 Le Chatelier Water Bath is used with Le Chateliermoulds for the determination of the soundness of cement paste. Soundness of Cement by Le- Chatelier method Apparatus Vibration machine to cement mortar used to compacting the cement mortar samples in the cube mold. Vibration machine to cement mortar

7 The cement mortar molds use to casting cement mortar for preparing the samples to compression test The cement mortar molds A ball mill is a type of grinder used to grind and blend materials for use in minerals concrete and cement minerals additives a mill balls apparatus

8 The cutter machine is used to cut the solid samples of concrete the rocks and bricks. The Cutting machines The core machine is used to take the solid core samples of concrete the rocks asphalt and bricks. The core machines

9 Machine of Flexural strength test generally used to determine the flexural modulus or flexural strength of a material Flexural strength test machine The mechanical mixer for concrete generally used to mix concrete materials The mechanical mixer for concrete.

10 The molds for concrete generally used for casting the concrete samples depending on specimen test, compressive, tensile and flexural strength Concrete Molds The vibration machine for concrete generally used to compacting concrete in the molds Vibration machine for concrete

11 The Slump test apparatus for concrete generally used to determine the relative consistency of freshly mixed concrete by the use of Slump Test. The slump test apparatus To determine the relative consistency of freshly mixed concrete by the use of Compacting Factor Test Compacting Factor Apparatus

12 Schmidt hammers, or concrete test hammers, is used to determine in-place strength of concrete. All of the concrete rebound hammers we carry below accurately measure compressive strength of concrete, which directly determines the load-bearing capacity and durability of concrete structures. ASchmidt hammer a device ultrasonic pulse velocity An ultrasonic pulse velocity test is an in-situ, nondestructive test to check the quality of concretee and natural rocks. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an ultrasonic pulse passing through a concrete structure or natural rock formation. This test is conducted by passing a pulse of ultrasonic wave through concrete to be tested and measuring the time taken by pulse to get through the structure. Higher velocities indicate good quality and continuity of the material, while slower velocities may indicate concrete with many cracks or voids.

13 is a sophisticated device for the non- destructive location of rebars and for the measurement of concrete cover and bar diameters, using the eddy current principle with pulse induction as the measuring method, as well as detecting the rebar diameter accurately to the millimeter by only one measuring procedure. Rebar detection device Apparatus cement flow table Apparatuscementflowtable is used to determine the flow of hydraulic cement, mortars and cement pastes. A test specimen is molded on the table to a specified volume and shape. Then, with the mold removed, leaving the test specimen on the table. The table is dropped and raised (via a hand crank or optional motor) a specified number of cycles, after which the flow (or increase in average diameter of the specimen) is measured. Motorized flow table with 254mm diameter.

14 Concrete thermometer is used to determination of temperature of freshly mixed concrete in site or lab. Concrete thermometer The apparatus of L-box test is used to measure the filling and passing ability of self-compacting concrete. L-Box test apparatus

15 The V Funnel Apparatus is used to evaluate the flow time of freshly mixed self-compacting concrete. V-funnel test apparatus Prepared by Dr. Abdullah Zeyad