COMMON EQUIPMENT & APPARATUS IN MATERIAL TESTING Flashcards
-An instrument with a mesh or perforated bottom used to separate coarse from fine materials of a loose matter.
SIEVE
<0.002
CLAY
0.002-0.0075
SILT
0.075 -0.42
FINE SAND
0.42-2.0
MEDIUM SAND
2.0-4.75
COARSE SAND
4.75-75
GRAVEL
-used for separation and size determination of particles. A particle by passing them through a series of chambers with mesh filters and agitating the sample to obtain complete separation.
SIEVE SHAKER
-is a measure of the strength of subgrade soil and highway subbase and subgrade via a penetration test.
CBR (CALIFORNIA BEARING RATIO) TEST MACHINE
Tests for resistance to abrasion in crashed rock, slag, crushed and uncrushed gravel
LOS ANGELES ABRASION MACHINE
-A device for determining the normal consistency and time of setting of Portland cements that consists of a rod weighing 300 grams, having a needle in each end, and supported in a frame with a graduated scale to measure the distance to which the needle penetrates the cement.
VICAT APPARATUS
-a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete.
CONCRETE MIXER
Types of Mixers.
Batch Mixers.
Drum Mixers.
Pan-Type Mixers.
Tilting Drum Mixers.
Non-Tilting Drum Mixers.
Reversing Drum Mixers.
Continuous Mixers.
-used to find the water-cement ratio in mixes. By measuring the difference between the mold height and the height of the specimen, researchers can evaluate the concrete consistency.
CONCRETE SLUMP
SLUMP TESTING SETS
Tape Measures
Tamping Rod
Slump Test Bases
Slump Cone Filling Funnel
Slump Cones
Sample Scoop
Scrub Brushes
-Cone shaped mold that can be made of steel or plastic and should measure 8” (203mm) dia. At base, 4’ (102mm) dia. at top and 12” (305mm) high.
STANDARD SLUMP CONE
The slump cone will sit on the base during the test, and it should include bolt-on clamps to hold the cone steady during testing.
SLUMP BASE PLATE
-Used to form specimens for testing compressive strength or serve as sample containers for set-time testing.
CONCRETE MOLDS
a non-destructive testing apparatus, whereby the rebound of the spring driven mass is measured after its impact with concrete surface.
REBOUND HAMMER
The output of the rebound hammer is referred to a
are correlated with surface hardness of concrete.
REBOUND NUMBER