Precursors and Additives for Geopolymer Synthesis

Vickers, Les; Riessen, Arie van

doi:10.1007/978-981-287-311-8_2

Cited by 9 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With heat treated laterite, we evidence the role of iron species from laterite (13.25 wt% of Fe2O3). It promotes the formation of a geopolymer structural network, as already studied in previous works [19,39,11,27].…”

Section: Discussionmentioning

confidence: 65%

“…It means that silica tetrahedral units become available for the polycondensation reactions. SiO4and AlO4units are able to form a new network where the negative charge of IV-fold coordinated Al 3+ is balanced by the positive charges of Na + ions from the alkaline solution [47,11]. The reaction process leads to the formation of a geopolymer gel that acts as the matrix phase, which bind unreacted particles, forming a composite geopolymer material.…”

Section: Discussionmentioning

confidence: 99%

“…It is from the initial stage of the geological formation process of laterite [24,34]. The sum of SiO2 and Al2O3 oxides is 70.38 wt.%, and it is known that the interaction of these two oxides is predominant during the formation of the geopolymer microstructure [11,35].…”

Section: Characteristics Of Raw Materialsmentioning

confidence: 99%

“…The curing and hardening processes are achieved at ambient temperature or slightly higher. The hardening reactions occurs between aluminosilicate precursors and highly concentrated aqueous solutions of alkaline hydroxides and silicates [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Laterite and lateritic soil constitute 33% of available mineral resources in tropical and subtropical zones of Africa, Australia, India, South-East Asia and South America. They are often found just below the surface of grasslands or forests [9,11,28]. In Cameroon, laterite and lateritic soil cover nearly 67% of the country surface [29,30].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Role of Heat-Treated Laterite on the Strengthening of Geopolymer Designed with Laterite as Solid Precursor

Poudeu¹,

Ekani²,

Djangang³

et al. 2019

ACSM

View full text Add to dashboard Cite

This paper aims to develop a low-cost, green construction material for low-income house builders. A series of geopolymer samples were prepared by partially substituting the Cameroonian lateritic soil (LS) with different quantities of heat-treated laterite (20~50 wt. %). The chemical composition of the LS was determined through inductively coupled plasma spectroscopy (ICP). The specimens were subjected to thermogravimetric and differential thermal analyses (TGA/DTA), X-ray diffractometry (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). In addition, the compressive strength of dry and wet specimens was measured with a hydroelectric device. The results show that the geo-polymerization and properties like setting time and mechanical strength of the samples were improved through the combined action of the raw LS and the laterite treated at 500-600°C; the crystallized particles from non-clayed minerals and from aggregates of kaolinite also contribute to strength of the samples; crystalline phases formed a tridimensional skeleton in the microstructure of the geopolymer. The research provides a promising composite that can serve as a low-cost construction material with reduced environmental impact.

show abstract

Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%