Using alkali-activated natural aluminosilicate minerals to produce compressed masonry construction materials

Muñoz, José F.; Easton, T.; Dahmen, Joseph

doi:10.1016/j.conbuildmat.2015.07.144

Cited by 25 publications

(6 citation statements)

References 32 publications

(32 reference statements)

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“…With the acceleration of infrastructure construction in China, the yield of slag, the by-product from the smelting of pig iron in steel mills in China, has been increasing day by day. According to the statistics [1,2], 0.5∼0.9t slag is produced from the production of each 1t pig iron, while the annual yield of slag in China is approximately 250 million tons. However, the deposit volume of slag has increased year by year due to the lack of effective ways of resource utilization [3,4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Liu,

Chen,

Chen

et al. 2024

Mater. Res. Express

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In order to solve such problems as difficulties in backfilling narrow foundation trenches in engineering, it was proposed to use alkali-activated slag cement (AASC) instead of traditional Portland cement to solidify silt and form AASC fluidized solidified soil. The effect of the content of AASC and the curing period on fluidized solidified soil was studied by unconfined compression strength test, SEM and EDS. Moreover, the root cause for the improvement of the strength by the microstructure was explored. The results showed that: The fluidity increased first and then decreased with the increase of the content of AASC; 40% was the optimal content; in the same curing period, the unconfined compression strength increased with the increase of the content; 40% was the optimal content; the soil with different contents could reach the most of the 28d strength on Day 7; AASC generated a lot of low-Ca/Si C-S-H gel that consolidated soil particles into a denser structure. These results provide a theoretical basis for the application of AASC in fluidized solidified soil engineering.

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Section: Introductionmentioning

confidence: 99%

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Liu,

Chen,

Chen

et al. 2024

Mater. Res. Express

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“…The majority of previous studies have adopted this approach (Cristelo et al, 2012;Narayanaswamy et al, 2020;Rios et al, 2016;Silva et al, 2015). The other approach is to use the soil itself as the sole precursor, with the clay minerals in soil (and associated minerals, to lesser extents) reacting with the alkaline activator (Marsh et al, 2019;Muñoz et al, 2015). This study adopts the latter approach.…”

Section: Introductionmentioning

confidence: 99%

Scale-up effects in alkali-activated soil blocks

Marsh

Heath

Reddy

et al. 2022

Proceedings of the Institution of Civil Engineers - Constructio

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Alkali activation is a novel method of soil stabilisation, which could be used for the production of compressed blocks as walling materials. Given that much of the fundamental research into the chemical behaviour of this process has been done for small specimens, there is a knowledge gap over the potential effects of increasing specimen size. In this study, blocks were made from a mix of soil, sand and sodium hydroxide solution using a manual block press. Their phase composition and microstructure were investigated using powder X-ray diffraction and scanning electron microscopy; drying behaviour and compressive strength were also measured. No major microstructural or phase differences were found between the central and edge regions of the blocks. Longer curing time had little effect on phase formation and microstructure, but resulted in increased compressive strength. There are no fundamental chemical issues obstructing the scale-up of this stabilisation method, but further research should focus on the measurement of properties in line with building standards and eliminating hazards in the manufacturing process.

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“…The attraction of alkali-activated materials is the opportunity to reduce carbon dioxide emissions, compared to cement and lime, during manufacture. Muñoz et al [8] produced alkali-activated stabilised materials from clay soils combined with alkali-activators. The binders combined Sodium Hydroxide (NaOH) with Sodium Silicate (Na2SiO2), and following a curing at 65 °C for 7 days stabilised earth materials with a compressive strengths up to 7.6 N/mm 2 were successfully produced.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties, and comparative life-cycle impacts, of stabilised earth building products

Narayanaswamy¹,

Walker

Reddy³

et al. 2020

Construction and Building Materials

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Using alkali-activated natural aluminosilicate minerals to produce compressed masonry construction materials

Cited by 25 publications

References 32 publications

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Scale-up effects in alkali-activated soil blocks

Mechanical and thermal properties, and comparative life-cycle impacts, of stabilised earth building products

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