Physicomechanical properties of fly ash applicable in road construction

Abstract

Physico-mechanical properties of fly ash applicable in road constructionAn experimental research of physico-mechanical properties of fly ash and ash stabilized with lime and cement, as used in road construction, is presented in the paper. The binder was added in the proportion of 2, 4 and 6 % of the total quantity of fly ash. The testing revealed that ash samples with and without binder can be used for improvement of foundation soil and for construction of embankments and subgrade layers, but are not recommended for construction of subbase and base courses. The research is based on the use of fly ash for road construction, i.e. as a substitute for natural materials in construction industry, as this use would save natural resources whose reserves are limited. Fizikalno-mehanička svojstva letećeg pepela primjenjivog pri građenju cesta U radu je prikazano eksperimentalno istraživanje fizikalno-mehaničkih svojstava letećeg pepela i stabiliziranog pepela s dodatkom vapna i cementa primjenjivog za gradnju cesta. Vezivo je dodavano sa 2, 4 i 6 % u odnosu na ukupnu količinu letećeg pepela. Nakon izvršenih ispitivanja uočljivo je da uzorci pepela bez dodataka i s dodatkom veziva mogu koristiti za izradu temeljnog tla, nasipa i posteljice, dok za izradu nosivih slojeva nisu preporučljivi. Istraživanje se temelji na korištenju letećeg pepela za izgradnju cesta, odnosno kao zamjena prirodnim materijalima u građevinarstvu, pri čemu se štede prirodni resursi čije su rezerve ograničene.

Development and Field Application of Phosphogypsum-Based Soil Subgrade Stabilizers

“…To protect the ecological environment and lower road construction cost, researchers are currently exploring use of industrial waste as a substitute for traditional cement and lime. For example, Mavroulidou [21] explored approaches to improve different clay properties of waste paper sludge [21], while Seslija et al [22] used fly ash to replace natural materials as building materials. On the other hand, Etim et al [16] used iron ore tailings and lime as soil conditioners to improve the properties of black cotton soil.…”

Analysis of the hydraulic binder use for base strengthening in pavement constructions

“…After the tests, it is concluded that the ash can be used to improve the pavement base. Some of the authors have examined the use of ash as a material for the construction of road embankments using a hydraulic binder (lime and cement) with different percentages [2]. The authors came to the conclusion that the application of ash with or without binders can be used for road construction and give quite good test results.…”