What tests are done on aggregate?
What tests are done on aggregate?
Bitumen adhesion test
| Property of aggregate | Type of Test |
|---|---|
| Toughness | Aggregate impact test |
| Durability | Soundness test- accelerated durability test |
| Shape factors | Shape test |
| Specific gravity and porosity | Specific gravity test and water absorption test |
How many tests are on fine aggregate?
5 COMMON FIELD TESTS ON AGGREGATE TO CHECK ITS QUALITY Aggregates influence the properties of concrete/mortar such as water requirement, cohesiveness and workability of the concrete in plastic stage, while they influence strength, density, durability, permeability, surface finish and colour in hardened stage.
What are the test for coarse aggregate?
List of Aggregate Test
- Impact Test on Aggregates.
- Crushing Test on Aggregates.
- Abrasion Test on Aggregates.
- Soundness Test on Aggregates.
- Shape Test on Aggregates (Elongation & Flakiness Index)
- Specific Gravity and Water Absorption Test on Aggregates.
- Bitumen Adhesion Test on Aggregates.
What size aggregate is used for road construction?
– It is the aggregate used for road construction. It is size of 40 mm, 50mm, 60 mm or as per design requirement. – Nowadays widely used material as a road aggregates is the GSB (Granular sub base) & WMM (wet mix macadam) which is used as base layer of road.
What are the tests for road construction?
Types of Soil Tests for Road Construction
- In-situ Moisture Content.
- Specific gravity of soil.
- Particle Size Distribution (By wet sieving & pipette method)
- Compaction test – Proctor test.
- California Bearing Ratio (CBR) Test.
What type of aggregate is used in roads?
Type 1: Limestone Aggregates Limestone aggregates are creating through the crushing of sedimentary rock. This type of aggregate is one of the most commonly used in road construction and reinforced concrete aside from granite and gravel.
Which size of aggregate is used in road?
How many tests are in sand?
Particle size distribution – this test can be conducted at site or in laboratory for every 40 cum of sand. Bulking of sand – this test is conducted at site for every 20 cum of sand….4. Test for Bulking of sand.
| Moisture content (%) | Bulking percentage (by volume) |
|---|---|
| 2 | 15 |
| 3 | 20 |
| 4 | 25 |
| 5 | 30 |
How can you select good quality aggregate?
Quality Counts Good-quality aggregate must be clean, hard, strong, have durable particles, and be free of absorbed harmful chemicals, coatings of clay, or other contaminates that can affect hydration of cement or reduce the paste-aggregate bond.
How many types of aggregate test are there?
List of IS Codes Related to Aggregate Testing
| Tests for Aggregates with IS codes | ||
|---|---|---|
| Property of Aggregate | Type of Test | Test Method |
| Crushing strength | Crushing test | IS : 2386 (part 4) |
| Hardness | Los Angeles abrasion test | IS : 2386 (Part 5) |
| Toughness | Aggregate impact test | IS : 2386 (Part 4) |
What is bitumen test?
Bitumen Tests- Softening Point Test The test is conducted by using Ring and Ball apparatus. A brass ring containing test sample of bitumen is suspended in liquid like water or glycerin at a given temperature. A steel ball is placed upon the bitumen sample and the liquid medium is heated at a rate of 5 C per minute.
Which aggregate is best for PCC?
40mm aggregate is used for PCC in foundation or base course in rigid pavement.
Which aggregate is used for PCC?
1. Coarse Aggregate. Coarse aggregate used in the PCC must be of hard broken stone of granite or similar stone, free from dust, dirt and other foreign matter. The stone ballast shall be 20 mm in size and smaller.
How many tests are there in road construction?
For road construction works, the properties of soil at subgrade level are required. The common soil test for road construction includes classification of soil, particle size distribution, moisture content determination, specific gravity, liquid limit, and plastic limit tests.
What is the CBR value for subgrade?
The minimum CBR value of a sub-base soil should be 20% and 30% for traffic up to 2 msa and traffic exceeding 2 msa respectively. Also, the minimum CBR value for a subgrade soil is usually 6%, although subgrade characterization recommends 10% [4] .
Which test is used for sand?
Silt content test – this is also a field test and to be conducted for every 20 cum. Particle size distribution – this test can be conducted at site or in laboratory for every 40 cum of sand. Bulking of sand – this test is conducted at site for every 20 cum of sand.
What are types of sand test?
The following are the various types of sand control tests:
- Moisture content test.
- Clay content test.
- Grain fitness test.
- Permeability test.
- Strength test.
- Refractoriness test.
- Mould hardness test.
What is the best size aggregate for concrete?
20mm
Typically the most common size of aggregate used in construction is 20mm. A larger size, 40mm, is more common in mass concrete. Larger aggregate diameters reduce the quantity of cement and water needed.
What are aggregate types?
Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a hydraulic cementing medium to produce either concrete or mortar. Types of aggregates include Coarse aggregate and fine aggregate.
What is Marshall test?
The Marshall Test is a popular and proven method to measure the load and flow rate of asphalt specimens, beginning with compaction into molds using manual or automated Marshall Compactors, and conditioned in a Water Bath at the specified temperature.
What is 20mm aggregate used for?
Up to 20mm of aggregate is used in RCC structures, because of ease in pouring of concrete due to increase in workability.
What is the minimum thickness of PCC?
The Thickness of PCC: The thickness of PCC is normally 50mm over Brick Flat Soling (BFS). If you don’t use BFS below PCC then the thickness should be 75¬mm. When the PCC is used in car parking area then the thickness should be 75mmover BFS.