Currently, there are some studies on fly-ash-stabilized steel-slag base courses. Sharma and Shen found that the strength development of the fly-ash-stabilized steel-slag material is the same as that of lime-fly-ash-stabilized steel-slag material, which has a good long-term strength. The incorporation of phosphogypsum or lime can …
The effect of SO 3 contents on strength of cement-fly ash stabilized crushed-stones is investigated. The scanning electron microscope (SEM) and MIP were employed to study the influences of SO 3 in cement. The experimental results showed that the SO 3 contents can affect the strength of cement -fly ash stabilized crushed-stones, and 5% of SO 3 is …
The fly ash was procured from a thermal power station located in Eklahara, Nashik, and was dark grey, insoluble in water, with a pH of 7.9. The fly ash analyzed …
The standard also recommended that the total lime-fly ash content is 10∼30%, and the mix ratio of lime and fly ash is 1:2–1:9 in the road base and subbase. The main work herein is to optimize the recommended content and mix ratio of lime and …
The utilization of waste fly ash in road construction is primarily confined to its use in embankment filling or as a stabilizer when combined with lime and cement. Its application in structural pavement layers, such as the base and subbase, faces a challenge due to the high volume of fine particles, which renders it brittle when stabilized. In this …
To assess the impact of solid waste phosphogypsum on the road performance of lime-fly ash-stabilized red clay, we conducted comprehensive tests on the road performance, swelling and shrinkage ...
48Y. Li et al. Table 3 . Geopolymer mix design Sample number Fly ash/% Mineral powder/% Wet carbide slag/% A1 10 85 5 A2 0 88 12 A3 0 95 5 A4 20 75 5
The fly ash was obtained from Wuhan Qingshan Thermoelectric Plan, the specific surface area of this fly ash is 293 m 2 /kg, the apparent density is 2210 kg/m 3, its chemical compositions are listed in Table 1, its particle size distribution is illustrated in Fig. 2.. The phosphogypsum was obtained from Wuhan Inorganic Salt Chemical Plant, its …
Fly Ash Stabilization The literature lacks a clear direction in selection parameters for the use of fly ash in soil stabilization. However, the literature documents that a wide range of aggregates can be suitably stabilized with fly ash including sands, gravels, crushed stones and several types of slags.
In order to study the effect of several factors on the shrinkage performance of lime-fly ash stabilized crushed stone, temperature shrinkage coefficients and dry shrinkage coefficients of mixtures with different gradations, lime and fly content and age were measured. Results indicate that mixture with a stone-on-stone contact has better …
Class F fly ash is not used as often because it requires an activator, either lime or cement, to form pozzolanic stabilized mixtures (PSMs) since it is not a self-cementing material [53, 54]. Zulkifley et al. [ 55 ] assessed the effect of off-specification fly ash on the engineering properties of tropical soils from Hawaii.
Based on the above problems, large-particle-size crushed stone materials were used in a base layer [7,8,9].In addition, fly ash and slag powder were used to replace cement as a binder in the base layer to save energy and protect the environment [].Then, large-particle-size crushed stone materials treated with fly ash and slag powder were …
The fly ash to be used in stabilization should be classified as either class C fly ash or a class F fly ash following AASHTO M 295. The cementitious properties of the fly ash to be used in stabilization should be characterized following ASTM D 5239 (Note 7). Note 7. ASTM D 5239 does not evaluate the interaction between fly ash and soil or ...
The results revealed that the strength of untreated and lime-treated fly ash was enhanced significantly with the addition of m-NC. Furthermore, the addition of m-NC …
Nowadays, inefficient properties of soils are a critical issue in engineering projects. In some cases, improve the characteristic of unsuitable soils is a fundamental step for making construction. This review paper presents the results of research on soil stabilization with lime and fly ash. Soil stabilization performed the use of technique to adding a binder …
Lime kiln dust (LKD) contains the key ingredients of lime (20-40% calcium oxide) and fly ash (8-15%) from the coal used to burn or calcinate the limestone to lime. LKD is used for …
Experimental Study on the Road Performance of High Content of Phosphogypsum in the Lime–Fly Ash Mixture. ... Mixture PG Fly ash Lime Crushed stone. A6 0 3 2 8 0. B4 0 5 4 6 0. C1 5 2 0 6 5 9 ...
lime-cement-fly ash stabilization 10
Zhang et al. [12] explored the feasibility of using PG to replace some of the lime and aggregate in the fly ash-lime stabilized crushed stone mixture, and found that addition of the PG with a ...
Fly Ash Description Lime/Fly Ash Proportion Water (grams) % Flow 7 Day (psi) CLASS F: Hatfield, American Electric Corporation, dry 33% hydrated lime/67% fly ash 315 68 1110 Hatfield Conditioned (10.2% water) 33% hydrated lime/67% fly ash 280 72 970 Brunners Island, Pennsylvania Power & Light, dry 33% hydrated lime/67% fly ash 380 68 1290
With the addition of 20% to 25% fly ash, there is only a slight decrease in the swelling potential of expansive soils, indicating that the optimum fly ash content is around 20%. Li and Benson [17] also confirm the mechanical performance improvement of road-surface gravel and recycled asphalt pavement (RAP) stabilized using fly ash.
Through the mixture ratio design of cement-fly-ash-flushed-by-seawater stabilized crushed-stone, the feasibility of the fly-ash-flushed-by-seawater material used for road construction is studied.
4.3 Stabilization with Lime 19 4.3.1 Requirement for soil modification/subgrade 19 improvement 4.4 Stabilization with Lime and Fly Ash (LF) 21 4.5 Stabilization with Lime, Cement and Fly Ash 22 4.6 Cement Stabilized Fly Ash 22 4.7 Test Requirements 23 4.7.1 Unconfined compressive strength test 23 4.7.2 Durability of stabilized materials 24
Fly ash, produced as a byproduct of thermal power plants, amounts to approximately 226 million tons annually, containing toxic chemicals and heavy metals that lead to soil and …
The improvement of unconfined compressive strength, Atterberg limits, swelling index, and CBR of fly ash stabilized soil was ... but an estimated amount of 52000 metric tons of fly ash is produced ... a penetration test in which the ratio of the penetration resistance of a particular soil sample to that of a standard crushed stone is calculated
Generally, the design age of cement or cement fly-ash stabilized material is 3 months, and the design age of lime or lime fly-ash stabilized material is 6 months. 5.3.2 Resilience Modulus Test According to specifications AASHTO T 307-99 ( 1999 ) and JTG E51-2009 T0807/ T0808 ( 2009 ), the resilience modulus test can be conducted to …
The fly ash cement stabilized macadam soil is used as pavement base material in synthetic slag disposal pit's earth and rockfill dam crest in Ningdong Energy and Chemical Base to replace the cement stabilized macadam.To reveal the mechanical properties of fly ash cement stabilized macedam soil and improve its efficient …
Combined with the initial consumption of lime (ICL) test result and relevant specifications, the optimized mix ratios are as follows: 2% lime + 11.82% fly ash and 2% lime + 3.95% fly ash can reach the strength requirement of road base and subbase, respectively; 2% lime + 3.84% fly ash in building foundations and subgrade and 2% …
Test results indicated that cement was preferable for higher strength at shorter curing times (7 days), while lime produced the maximum strength at longer …
Properties of Cement and Lime-Fly Ash Stabilized Aggregate G. S. NATT and R. C. JOSHI ABSTRACT ... tons as per procedure described in ASTM D 1632-63 ( reapproved in 1979) • Mixes were molded at their optimum moisture contents. Moisture-density rela