Calcining natural zeolites to improve their effect on cementitious mixture workability

Seraj, Saamiya; Ferron, Raissa Douglas; Juenger, Maria

doi:10.1016/j.cemconres.2016.04.002

Cited by 47 publications

(16 citation statements)

References 22 publications

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“…Alumino-siliceous materials are pozzolanic materials containing reactive silica and alumina [1]. Pozzolanic materials are well known as construction materials, wastes, and ashes produced from some agricultural materials, e.g., metakaolin, calcined clays, fly ash, slag, rice husk, sawdust, palm kernel shells, and sugarcane bagasse [1][2][3]. Pozzolanic materials have been used as precursors for geopolymer materials, which are obtained by the reaction of aluminosilicates with a highly alkaline environment, leading to the formation of a continuous threedimensional network of inorganic molecules linked by covalent bonds [4].…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of animal oil or butter and hydrogen peroxide on physical and mechanical properties of porous alumino-siliceous materials

Lertcumfu¹,

Kaewapai²,

Jaita³

et al. 2020

ScienceAsia

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Porous alumino-siliceous (PAS) materials are attractive for use in a wide variety of construction and adsorption materials. In the present study, the porous alumino-siliceous materials were synthesized by a geopolymerization method in a reaction from ceramic waste, metakaolin, and an alkaline solution, H 2 O 2 (as a foaming agent) and either pork lard or butter (surfactants). Different amounts of the surfactants (2.5-15 wt%) were added to the samples. The pore shape in the PAS materials was affected by the type of surfactant used. PAS materials with small open pores and high porosity were successfully fabricated with butter as a surfactant. The compressive strength value trend was related to total porosity. The relationship between compressive strength and porosity was found to be consistent with a model proposed by Ryshkewitch. The results suggest that this material can be used as a foam material.

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Section: Introductionmentioning

confidence: 99%

Synergistic effect of animal oil or butter and hydrogen peroxide on physical and mechanical properties of porous alumino-siliceous materials

Lertcumfu¹,

Kaewapai²,

Jaita³

et al. 2020

ScienceAsia

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“…The term "activation" arises from the fact that zeolites are usually suggested for use in the treatment of clayey soils owing to their high reaction activity. Zeolites are naturally occurring pozzolans with a honeycomb structure having a high water demand, higher absorption rate, and high specific surface area, which when compared to mixtures with other pozzolans such as fly ash, enables them to be incorporated in the stabilization of saturated sand deposits [7,8]. Their successful application in soil treatment depends heavily on the ignition of pozzolanic reactions.…”

Section: Introductionmentioning

confidence: 99%

Undrained Shear and Pore Space Characteristics of Treated Loose Sands with Lime-Activated Zeolite in Saturated Settings

Jamhiri

Pakbaz

2020

Civil and Environmental Engineering Reports

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This research investigates the mechanical behavior of artificially cemented sandy soils formed by lime alkali activation of natural zeolite under saturation settings. In order to verify the bar capability of cemented sands with this new method, an analysis of the undrained shear strength of the soil with pore water pressure ratio measurements was performed from the interpretation of the results of unconfined compression tests. The effect of zeolite-lime blend on treated sands was also visualized by scanning electron microscopy. For the studied soils, it was concluded from the unconfined compression stress values that the soil is fully capable of withstanding compressions due to overburden pressure. Additionally, this study seeks to evaluate the effect of the void ratio on the pore space and undrained shear strength. The results showed that pore water B-ratio increases with the decrease of the void ratio. Moreover, with the increase of zeolite content, confining pressure, and curing age, the peak failure strength increases. The results indicated a promising consistency of treated samples with lime and zeolite under various values of undrained shearing and B-ratios, making this method an ideal treatment for loose sand deposits.

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“…The effects of calcination temperature on the pozzolanic activity of natural zeolites were investigated. The blended cement with calcined forms of zeolite showed less water/cement ratio, improve workability of the pastes and increase the mechanical properties [23]. Burris and Juenger [24] observed the milling of natural zeolites that used as pozzolana materials to improve the activity of zeolites.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Saraya

Thabet

2018

Al-Azhar Bulletin of Science

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This paper presents details about mineralogical and chemical composition of natural zeolite (NZ) from Harrat Shama for using it as a pozzolanic material. The structural properties and mineralogical composition of NZ were determined using XRF, XRD, FTIR, DSC, SEM-EDX as well as study surface texture and cation exchange capacity. The geopolymer paste was prepared using sodium silicate solution as activator for zeolite and incubated at 25 and 45 ºC up to 90 days. The compressive strength of NZ-based geopolymer was investigated up to 90 days. Five blended cement were designed by substitution for Portland cement by 0 %, 5 %, 10 %, 15 % and 20% of NZ. The compressive strength of NZ-OPC pastes were studied up to 90 days. The microstructure of NZ-Based geopolymer and hydrated NZ-cement pastes were tested. The results were shown that the sum of SiO 2 , Al 2 O 3 , and Fe 2 O 3 content in the natural zeolite was approximately 82.71.3% and mainly composed of clinoptilolite mineral. Geopolymerization of NZ gave a good dense geopolymer matrix with high early stage mechanical properties. The NZ has shown improving early stage compressive strength of all blended cement pastes up to 7 days. The incorporation of nature raw zeolite in cement, up to 10% wt, improved the compressive strength to 7-29%. Generally, Saudi Arabian natural zeoilite (NZ) have high pozzolanic properties and could be used in the preparation of geopolymers matrix and blended cement pastes.

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Calcining natural zeolites to improve their effect on cementitious mixture workability

Cited by 47 publications

References 22 publications

Synergistic effect of animal oil or butter and hydrogen peroxide on physical and mechanical properties of porous alumino-siliceous materials

Synergistic effect of animal oil or butter and hydrogen peroxide on physical and mechanical properties of porous alumino-siliceous materials

Undrained Shear and Pore Space Characteristics of Treated Loose Sands with Lime-Activated Zeolite in Saturated Settings

Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

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