fly ash supplier in Saudi Arabia
Builmix best fly ash supplier in Saudi Arabia, one of the largest companies in the Arab world that are distinguished in the field of fly ash concrete , it will discuss the types, properties, advantages, and uses of fly ash in concrete.
What is fly ash in concrete?
It is considered a by-product of rice husk widely spread in the country of the Philippines, and it is a partial substitute for ordinary Portland cement, and through many previous studies the ideal values for replacing the ash husk from rice are about ten to twenty percent
Fly ash as a supplement in concrete:
Rice husk ash has a good reaction when used as a partial substitute for cement, and these are prominent in countries where rice production is abundant, where rice husk ash has been correctly found to be active within the cement paste, therefore, the use and practical application of rice husk ash for manufacturing Concrete is important, as the American Concrete Institute studied the effects of coconut husk ash and rice husk ash as cement substitutes in varying proportions on workability, setting time, compressive strength and pull-out strength of concrete.
Classification of fly ash in concrete and chemical composition:
Builmix, which is distinguished in the field of fly ash suppliers in Saudi Arabia, classifies fly ash in concrete and chemical composition as follows:
- Cellulose (C5H10O5).
- Lignin (C7H10O3).
- Hemicellulose.
- Silicon dioxide (SiO2).
- Holocellulose.
Fly ash burning process:
Builmix, which is distinguished in the field of fly ash suppliers in Saudi Arabia, explains the process of burning fly ash as follows:
The open burning of the rice husk is sometimes traditionally done, this method causes significant air pollution that causes lung and eye diseases, As mentioned above, the quality of the rice husk depends greatly on the type of firing process being performed. Various types of burns are performed, and they are listed below.
1- Burning fly ash in an open field:
The open burning method of rice husk ash produces inferior rice husk ash. These produce a structure that is very crystalline and has less reactivity.
2- Burning fly ash in a fluidized bed oven:
This is a controlled method of burning rice husk. The heat of combustion is used for the rice husk to generate electricity. The controlled process is carried out by keeping the time and temperature parameters. The combustion temperature ranges from 500 to 700 ° C. This is done for a longer period so that the carbon is completely removed. Or the temperature is increased from 700 to 800 ° C for one minute. The fluidized furnace method produced rice husk ash containing 80-95% silicon dioxide, 1-2% potassium oxide (K2O), and 3-18% unburned carbon. Rice husk ash produced by this method has a higher cellular structure.
3- Burning fly ash in industrial furnaces:
This method was proposed to facilitate environmental and economic causes. The combustion efficiency will output silica dioxide in the range of 90-95%. This method helps in producing rice husk ash with amorphous silica and cytoskeletal products in an easier way. Rice husk ash obtained from this method is considered highly pozzolanic.
