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Department of Civil Engineering, Malayer University
10.22034/road.2022.333556.2034
Abstract
The use of waste materials from various factories and industries in the soil to improve engineering properties is one of the new methods in this field. Fly ash is also an essential by-product of coal-fired power plants or from heating the wastes of some factories, which has suitable pozzolanic properties and is used in construction projects for use in concrete and geotechnical projects for soil stabilization. In this review study, a type of fly ash with different chemical properties has been used compared to other studies related to improving soil grain in the central regions of Iran. Density, permeability, and the load-bearing ratio of California (California Bearing Ratio) According to the results, research can be done on samples with different percentages of fly ash with or without lime. there is no significant increase in unconfined compressive strength for more than 28 days. Considerable increase in adhesion over longer times in samples Contains ash with a higher percentage. This effect is possible. Due to the rise of soil adhesion with the pozzolanic reaction of fine ash particles, its hardening effect is related to the presence of free lime with water-soluble ash parts. Modification of the mechanical properties of soil mixed with fly ash or soil alone may depend on the moisture loss of the sample during the recovery period.