What is the density of fly ash?
What is the density of fly ash?
The bulk density of fly ash from different sources without any classified is quite different, most of which are between 1.9-2.9g /cm3. Due to the different composition and structure of fly ash particles, bulk density among each particle is also different.
What is fineness of fly ash?
The effects of fly ash fineness on the compressive and splitting tensile strength of the concretes were remarkably seen in the fly ash with FAC code with fineness of 5235 cm2/g.
What is the percentage of fly ash?
Typically, 15 percent to 30 percent of the portland cement is replaced with fly ash, with even higher percentages used for mass concrete placements. An equivalent or greater weight of fly ash is substituted for the cement removed. The substitution ratio for fly ash to portland cement is typically 1:1 to 1.5:1.
How do you find the specific gravity of fly ash?
For example, if a cementitious material is composed of 20% fly ash and 80% cement by weight, and the fly ash specific gravity is 2.3, the percent by volume or volume equivalency can be computed as follows: Fv = 1 = 0.255 or 25.5% 1 + (2.3/3.15)((1/0.2)-1) – 8 – Page 9 Percent cement by volume (Cv) = 100 – 25.5 = 74.5%.
What is density of pond ash?
The maximum dry density and optimum moisture content of pond ash vary within the range of 8.40–12.25 kN/m3 and 29–46%, respectively.
What is the density of Ggbs?
Typical physical properties
| Colour: | off-white |
|---|---|
| Specific gravity: | 2.9 |
| Bulk density: | 1000 – 1100 kg/m3 (loose) 1200 – 1300kg/m3 (vibrated) |
| Fineness: | >350m2/kg |
How can you tell the quality of fly ash?
Testing Process – Immerse completely dried specimen in clean water at a temperature of 270C (+/-) 20C for 24 hours. Remove the specimen and wipe out any traces of water with a damp cloth and weigh the specimen. Complete the weighing 3 minutes after the specimen has been removed from water (M2).
What are the properties of fly ash?
The four most relevant characteristics of fly ash for use in concrete are loss on ignition (LOI), fineness, chemical composition and uniformity. LOI is a measurement of unburned carbon (coal) remaining in the ash and is a critical characteristic of fly ash, especially for concrete applications.
What is the maximum percentage of fly ash in concrete?
The Fly ash maximum allowed is revised to 28 to 33% but commonly it must be Max. 20% in use.. The Fly Ash fills the Voids in the resulting concrete mix. Fly ash increases the workability of the mix also.
What is the maximum size of fly ash is?
1000μm
Explanation: Fly ash is a finely divided particle produced from the combustion of coal. Its maximum size is 1000μm.
What is the density of fine aggregate?
Density of Fine Aggregate Density of sand (fine aggregate) is ranging between 1450 – 2082 kg/m3 depending on different condition like wet, dry, loose, dry-packed, and wet packed.
What is the difference between fly ash and pond ash?
In fact, the pond ash is a mixture of fly ash and bottom ash. The main difference between pond ash and fly ash is in their particle size. The pond ash being coarser and less pozzolonic and hence is not being accepted as pozzolona. Some of the physical properties of pond ash are described in Table -1.
The density of fly ash is the weight of fly ash per its volume. I would like to point out that there are conceptual differences between density , specific weight and specific gravity.
What is the difference between fly ash and bottom ash?
Bottom ash is coarser than fly ash, with a sandy texture and particles ranging from about 0.1 mm to 50 mm in diameter. The properties of fly ash and bottom ash make them useful for a variety of construc tion applications. Figure 2.
What is the difference between Class F and Class C ash?
Some fly ashes meet both Class F and Class C classifications. Fly ash is used in about 50% of ready mixed concrete (PCA 2000). Class F fly ash is often used at dosages of 15% to 25% by mass of cementitious material and Class C fly ash is used at dosages of 15% to 40% by mass of cementi- tious material.
What is flyfly Ash made of?
Fly ash particles are composed mainly of amorphous or glassy aluminosi licates. However, the particles also contain some crystalline compounds that either pass through the combustion zone unchanged or are formed at high temperatures.
