Mechano-chemical activation of high-Ca fly ash by cement free blending and gypsum aided grinding

Sadique, Monower; Al-Nageim, Hassan; Atherton, William; Seton, Linda; Dempster, Nicola M.

doi:10.1016/j.conbuildmat.2013.02.050

Cited by 56 publications

(39 citation statements)

References 33 publications

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“…In recent years, organic grinding aids (GA) are used to improve the grinding efficiency of solid materials such as cement, slag, fly ash and others. These organic molecules can be adsorbed in the particles and then cause a change in the physical and chemical properties of particle surface in the grinding process, thus play the dispersion and grinding role so that reduce the grinding energy consumption [35][36][37][38]. The ground powder particles with GA have fine sphericity, uniform particle size distribution and excellent dispersibility.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine grinding of fly ash with grinding aids: Impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash

Zhao

Wang

et al. 2015

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Ultrafine grinding of fly ash with grinding aids: Impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash

Zhao

Wang

et al. 2015

Construction and Building Materials

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“…In recent years, organic grinding aids (GA) have been used to improve the grinding efficiency of cement. These researches show that organic GA molecules can be adsorbed on the particles and effectively weaken the agglomeration of fine particle in the grinding process, thus improving the dispersion of powder and grinding efficiency [28][29][30][31]. Therefore, it is a good choice to use GA in the grinding process of steel slag for many manufacturers to improve preparation efficiency of steel slag powder.…”

Section: Effect Of Organic Grinding Aids On the Grinding Property Of mentioning

confidence: 99%

“…improving the dispersion of powder and grinding efficiency [28][29][30][31]. Therefore, it is a good choice to use GA in the grinding process of steel slag for many manufacturers to improve preparation efficiency of steel slag powder.…”

Section: Effect Of Ga On the Sieving Residue Of Steel Slag Powdermentioning

confidence: 99%

Comparison of Grinding Characteristics of Converter Steel Slag with and without Pretreatment and Grinding Aids

2016

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Abstract:The converter steel slag cannot be widely used in building materials for its poor grindability. In this paper, the grinding characteristics of untreated and pretreated (i.e., magnetic separation) steel slag were compared. Additionally, the grinding property of pretreated steel slag was also studied after adding grinding aids. The results show that the residues (i.e., oversize substance) that passed a 0.9 mm square-hole screen can be considered as the hardly grinding phases (HGP) and its proportion is about 1.5%. After the initial 20 min grinding, the RO phase (RO phase is a continuous solid solution which is composed of some divalent metal oxides, such as FeO, MgO, MnO, CaO, etc.), calcium ferrite, and metallic iron phase made up most of the proportion of the HGP, while the metallic iron made up the most component after 70 min grinding. The D50 of untreated steel slag could only reach 32.89 µm after 50 min grinding, but that of pretreated steel slag could reach 18.16 µm after the same grinding time. The grinding efficiency of steel slag was obviously increased and the particle characteristics were improved after using grinding aids (GA), especially the particle proportions of 3-32 µm were obviously increased by 7.24%, 7.22%, and 10.63% after 40 min, 50 min, and 60 min grinding, respectively. This is mainly because of the reduction of agglomeration and this effect of GA was evidenced by SEM (scanning electron microscope) images.

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“…Blends of ash and gypsum have already been tested as construction materials (Sadique et al, 2013). In present experiment the soil improver, nutrient supplier and heavy metal stabilizer effects of the ash residue described previously were studied in a soil incubation model experiment.…”

Section: Introductionmentioning

confidence: 99%

A Blend of Bioash and Gypsum Utilized for Agro-Environmental Purposes in a Soil Incubation Experiment

Rékási¹,

Uzinger²,

Szécsy³

et al. 2015

AEER

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Abstract. Soil improver, nutrient supplier and heavy metal stabilizer effects of ash residue remaining after the process for K recovery was examined in a soil incubation model experiment using two soil types (acid sandy soil and neutral loam soil) at 4 ash residue dose levels (0, 1, 3, 5%). Possible environmental risks posed by its application were also studied by ecotoxicological assays. As the result of ash residue treatment alkalinity of the soils has been raised in all treatments. In the case of acid soil even the use of 1% of ash residue proved to be enough for neutralising the soil pH. Ash residue is principally suitable for K and P supply and mostly in soils with poor nutrient content, where ash residue applied in 1% dose is able to increase the concentration of plant available K and P significantly. According to the results, the ash residue proved to be able to decrease the mobility of Pb and Zn which means that it can be an effective stabilizer in acid and neutral soils. Stabilization has probably occurred via adsorption. Based on the findings of the ecotoxicological assays, the use of 1% ash residue does not present substantial environmental risk.

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Mechano-chemical activation of high-Ca fly ash by cement free blending and gypsum aided grinding

Cited by 56 publications

References 33 publications

Ultrafine grinding of fly ash with grinding aids: Impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash

Ultrafine grinding of fly ash with grinding aids: Impact on particle characteristics of ultrafine fly ash and properties of blended cement containing ultrafine fly ash

Comparison of Grinding Characteristics of Converter Steel Slag with and without Pretreatment and Grinding Aids

A Blend of Bioash and Gypsum Utilized for Agro-Environmental Purposes in a Soil Incubation Experiment

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