Field and Laboratory Investigations on the Use of Fly Ash …

2020-10-13 · Fly ash concrete mixtures were made at the 20 and 30% (FA20, FA30 in Table 3) cement replacement levels (by mass) of the cement C2. Several mix designs were made boosted and unboosted, for comparison purposes. "Ternary preventive" systems using combinations of LiN (50 and 75%) and fly ash (15 and 20%) were generally made with added

[PDF] Fly ash incorporated with biocement to improve …

This research indicates that incorporation of biocement in fly ash is an effective means of increasing the strength of expansive soils. Microbially induced calcium carbonate precipitation (MICP) results in the formation of biocement (BC). This process, also known as biocementation, is recently widely used to improve the strength and durability of building materials including soils.

(PDF) Fly Ash as a Cementitious Material for Concrete

2020-4-2 · The characteristics of fly ash allow it to be a geotechnical material to produce geopolymer cement or concrete as an alternative of ordinary Portland cement. Many …

A new approach to prepare mesoporous silica using coal …

2016-10-15 · A cost-effective and industrially feasible method was proposed to prepare mesoporous silica. The well-developed acid leaching technology was used as a novel pore forming method for treating coal fly ash. And mesoporous silica with specific surface area as high as 585.02 m 2 /g and pore volume of 0.54 cm 3 /g was successfully prepared under a ...

An Efficient Approach for Lithium and …

A novel technique was developed for the recovery of lithium and aluminum from coal fly ash using a combination of pre-desilication and an intensified acid leaching process. The main components of the high-aluminum fly ash were …

Surface characteristics and CO2 adsorption capacities of …

2017-4-1 · Zeolite 13X was synthesized from palm oil mill fly ash (POMFA) using an alkaline fusion method. A zeolite 13X yield of 85% was obtained at a mass ratio of NaOH/(SiO 2 and Al 2 O 3 precursors) of 1.6, a fusion temperature of 600 °C and a fusion time of 60 min. Acid activation was performed on the zeolite 13X product in order to enhance its CO 2 adsorption capacity.

Leaching potential of stabilized fly ash from the …

2019-2-15 · The presence of toxic metals in municipal solid waste incineration fly ash is of great concern due to their leaching potential in landfills. To prevent groundwater or soil contamination caused by metal leaching from fly ash, recently the Chinese government began to require that the leachate concentrations of toxic metals not only satisfied the GB 16889-2008 criteria prior to …

Distribution and occurrence of lithium in high-alumina …

High-alumina-coal fly ash (HAFA) with a high Li content is regarded as a potential resource for Li production. To support the development of Li recovery technology from HAFA, the ... HAFA samples were dried at 105 ℃ for 5 hours and were ground using a ball mill at 300 rpm for 2 hours. The magnetic particles were first separated from the HAFA ...

Synthesis of zeolite Li-ABW from fly ash by fusion method

2009-10-30 · The zeolite Li-ABW was synthesized by fusion method using fly ash as raw material. It comprised alkaline fusion followed by hydrothermal treatment in LiOH·H 2 O medium. Crystallinity of zeolite as high as 97.8% was attained under the following conditions: LiOH·H 2 O concentration, 3 M; hydrothermal temperature, 180 °C; the corresponding aging time, 12 h.

Fly ash incorporated with biocement to improve strength …

2018-2-7 · Biocement precipitated by Bacillus megaterium was blend with four formulations of fly ash at concentrations of 0, 10, 25 and 50%, namely 0% FABC, 10% FABC, 25% FABC, and 50% FABC, respectively ...