One-part alkali activated cement based volcanic pumice

Castro-Fresno, Daniel; Hamadna, Sameer; Soroushian, Parviz

doi:10.1016/j.conbuildmat.2017.06.139

Cited by 48 publications

(26 citation statements)

References 49 publications

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“…Aerated cementitious materials (e.g., aerated concrete) have been developed mostly to provide thermal insulation qualities [ 6 , 7 , 8 ]. This work focused on the development of aerated slurries with a relatively low density and modulus and viable strength for use as matrix in structural composites as investigated in our previous studies [ 9 , 10 , 11 , 12 , 13 ]. This aerated slurry-infiltrated mesh is developed as a construction material that offers qualities intermediate between wood and concrete.…”

Section: Introductionmentioning

confidence: 99%

Physio-Microstructural Properties of Aerated Cement Slurry for Lightweight Structures

et al. 2018

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Cementitious composites, including ferrocement and continuous fiber reinforced cement, are increasingly considered for building construction and repair. One alternative in processing of these composites is to infiltrate the reinforcement (continuous fibers or chicken mesh) with a flowable cementitious slurry. The relatively high density of cementitious binders, when compared with polymeric binders, are a setback in efforts to introduce cementitious composites as lower-cost, fire-resistant, and durable alternatives to polymer composites. Aeration of the slurry is an effective means of reducing the density of cementitious composites. This approach, however, compromises the mechanical properties of cementitious binders. An experimental program was undertaken in order to assess the potential for production of aerated slurry with a desired balance of density, mechanical performance, and barrier qualities. The potential for nondestructive monitoring of strength development in aerated cementitious slurry was also investigated. This research produced aerated slurries with densities as low as 0.9 g/cm3 with viable mechanical and barrier qualities for production of composites. The microstructure of these composites was also investigated.

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Section: Introductionmentioning

confidence: 99%

Physio-Microstructural Properties of Aerated Cement Slurry for Lightweight Structures

et al. 2018

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“…The foamed water was then mixed with cement in a planetary mixer over 12 minutes to produce a homogenous aerated slurry; the dosage of the foaming agent (saponin) was adjusted to produce (after curing and oven-drying of slurry) a bulk density of 0.75 g/cm 3 . Physical and mechanical properties of aerated slurry cement were studied in our previous works 34–38 . The aerated slurry was added to fine wood particles, wood chips or shredded straw at an aerated slurry-to-biomass weight ratio of 0.2 in a drum mixer.…”

Section: Methodsmentioning

confidence: 99%

Aerated Cement Slurry and Controlling Fungal Growth of Low-Cost Biomass-Based Insulation Materials

Castro-Fresno

Soroushian

2019

Sci Rep

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Wood chips or particles as well as shredded straw offer desired thermal insulation qualities. When exposed to a humid environment, however, fungal growth on wood and straw is an important consideration. An experimental investigation was conducted in order to evaluate the effectiveness of a simple treatment in mitigating fungal growth on wood- and straw-based insulation. This treatment involved blending of wood chips or particles, or shredded straw with an aerated slurry which offers the potential to mitigate fungal growth on biomass by a combination of physical and chemical effects without imposing a weight penalty. Experimental results verified the effectiveness of this treatment in controlling fungal growth on wood and straw subjected to different moisture conditions.

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“…An increase in the pozzolanic activity of VA can overcome the important disadvantage of low early strength gains in cement containing VA materials [ 66 , 70 ]. Thus, different pre-treatments have been used to increase the potential reactivity of VAs [ 43 , 49 , 50 , 51 , 71 , 72 ]. There are three types of pre-treatment: mechanical activation (MA), the thermal method via calcination and chemical activation methods.…”

Section: Treatments To Increase the Reactivity Of Natural Volcanicmentioning

confidence: 99%

“…Analcite kept its original crystal structure even after the loss of water. The phillipsite mineral transformed into metaphillipsite, which is a highly reactive product, after calcination to 500 °C, although calcination to 800 °C transformed it into a stable phase of feldspar with low pozzolanic activity [ 71 , 80 ]. Robayo-Salazar et al [ 42 ] employed a calcination process at 700 °C with a Colombian VA material that was rich in montmorillonite, had a very high water-adsorption capacity and low reactivity.…”

Section: Treatments To Increase the Reactivity Of Natural Volcanicmentioning

confidence: 99%

“…According to Hamidi et al and Askarinejad et al [49,67], thermally treated andesite VA material after a calcination process at 800 and 700 • C had faster calcium fixation when added to a Ca(OH) 2 solution than andesite VA material calcined at 900 • C. Additionally, VA materials with analcite and phillipsite as the main mineral phases showed a reduction in pozzolanic activity after the calcination process at 500-800 • C. Analcite kept its original crystal structure even after the loss of water. The phillipsite mineral transformed into metaphillipsite, which is a highly reactive product, after calcination to 500 • C, although calcination to 800 • C transformed it into a stable phase of feldspar with low pozzolanic activity [71,80]. Robayo-Salazar et al [42] employed a calcination process at 700 • C with a Colombian VA material that was rich in montmorillonite, had a very high water-adsorption capacity and low reactivity.…”

Section: Thermal Activation Via Calcinationmentioning

confidence: 99%

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Volcanic Ash as a Sustainable Binder Material: An Extensive Review

2021

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The construction industry is affected by the constant growth in the populations of urban areas. The demand for cement production has an increasing environmental impact, and there are urgent demands for alternative sustainable solutions. Volcanic ash (VA) is an abundant low-cost material that, because of its chemical composition and amorphous atomic structure, has been considered as a suitable material to replace Portland cement clinker for use as a binder in cement production. In the last decade, there has been interest in using alkali-activated VA material as an alternative material to replace ordinary Portland cement. In this way, a valuable product may be derived from a currently under-utilized material. Additionally, alkali-activated VA-based materials may be suitable for building applications because of their good densification behaviour, mechanical properties and low porosity. This article describes the most relevant findings from researchers around the world on the role of the chemical composition and mineral contents of VA on reactivity during the alkali-activation reaction; the effect of synthesis factors, which include the concentration of the alkaline activator, the solution-to-binder ratio and the curing conditions, on the properties of alkali-activated VA-based materials; and the mechanical performance and durability properties of these materials.

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One-part alkali activated cement based volcanic pumice

Cited by 48 publications

References 49 publications

Physio-Microstructural Properties of Aerated Cement Slurry for Lightweight Structures

Physio-Microstructural Properties of Aerated Cement Slurry for Lightweight Structures

Aerated Cement Slurry and Controlling Fungal Growth of Low-Cost Biomass-Based Insulation Materials

Volcanic Ash as a Sustainable Binder Material: An Extensive Review

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