Eco-friendly modification of earthen construction with carrageenan: Water durability and mechanical assessment

Nakamatsu, Javier; Kim, Su Yeon; Ayarza, Jorge; Ramı́rez, Eduardo; Elgegren, Mariela; Aguilar, Rafael

doi:10.1016/j.conbuildmat.2017.02.062

Cited by 73 publications

(43 citation statements)

References 27 publications

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“…Deterioration of earthen walls can come about through different processes. Morton and Little (2015) observed seven different decay mechanisms on wall specimens exposed to outdoor conditions: shrinkage, surface erosion, sacrificial erosion, freeze/thaw cycles, organic growth, delamination and dampness. Most of these can be avoided or kept in check by appropriate detailing, but the above mentioned architectural trends leave the walls without traditional measures against the surface erosion caused by driving rain, which provides the focus to this present paper.…”

Section: Deterioration Of Earthen Wallsmentioning

confidence: 99%

Durability of Stabilized Earthen Constructions: A Review

Medvey

Dobszay

2020

Geotech Geol Eng

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It has become general practice to stabilize earthen materials with chemical binders, since one of their main weaknesses is their lack of durability. The most commonly used stabilizer is cement, which reinforces earth by enhancing its strength and water resistance with chemical bonds, while at the same time significantly increases its embodied energy and reduces its sorption capacity. These side-effects greatly reduce the sustainability appeal of earthen materials, leading to a contradiction in this application of cement. Since the researcher community has been aware of this more and more results are published of experiments with alternative stabilizers. This review provides an overview of research about the durability of stabilized earthen walls, the methods used to assess it and parameters that have been shown to affect it. The review features a brief history of this field, but focuses more on recently published data about the water erosion performance of stabilized earthen construction materials. Conclusions about the existing test methods are drawn, with directions for further development suggested.

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Section: Deterioration Of Earthen Wallsmentioning

confidence: 99%

Durability of Stabilized Earthen Constructions: A Review

Medvey

Dobszay

2020

Geotech Geol Eng

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“…One class of modern, widely available organic products are biopolymers which are receiving attention as stabilisers for earthen materials due to their potential green credentials (Chang, et al, 2016). Recent work reported in Aguilar, et al, (2016) and Nakamatsu, et al, (2017) has investigated the use of biopolymers (namely chitosan and carrageenan) as stabilisers and has reported that the addition of these biopolymers improved mechanical and durability performance of earthen materials. Very recently, the mechanical behaviour of earthen construction materials stabilised with the biopolymers guar gum and xanthan gum was studied by Muguda, et al, (2017) which showed that the addition of these biopolymers improved compressive and tensile strengths.…”

Section: Durability Of Earthen Construction Materialsmentioning

confidence: 99%

Advances in the Use of Biological Stabilisers and Hyper-compaction for Sustainable Earthen Construction Materials

Muguda

Lucas

Hughes

et al. 2019

Earthen Dwellings and Structures

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“…Considering these limitations, bio-admixtures (defined as biopolymers and products derived from biotechnological processes) have attracted great attention [8,9]. Nakamatsu et al evaluated the use of carrageenan as a bio-admixture to considerably improve compressive strength of earth constructions [10]. Molasses was used by Akar and Canbaz [11] as a bio-admixture to improve concrete durability.…”

Section: Introductionmentioning

confidence: 99%

Modifying Mechanical Strength and Capillary Porosity of Portland Cement-Based Mortar Using a Biosurfactant from Pseudomonas fluorescens

Serres

Meylheuc

et al. 2020

Advances in Materials Science and Engineering

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We characterized the effects of a biosurfactant derived from Pseudomonas fluorescens on slump loss, mechanical strength, capillary porosity, and bacterial colonization inside Portland cement-based mortar samples. Standard tests were used to evaluate the utility of this biosurfactant as an admixture. e addition of 1.5% biosurfactant increased the plasticity and improved the workability of fresh samples. Although compressive and flexural strengths of mortars with biosurfactant were lower than those of mortars without biosurfactant after a short curing period (28 days), the addition of biosurfactant increased the compressive strength of mortar after a long curing period (180 days), with 1% biosurfactant having the highest value. After 180 days, mortar with biosurfactant had significantly lower capillary absorption coefficient A values (P < 0.05) than mortar without biosurfactant. Furthermore, the addition of biosurfactant reduced the relative abundance of the mortar-deteriorating bacterial genus Pseudomonas (phylum Proteobacteria).

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Eco-friendly modification of earthen construction with carrageenan: Water durability and mechanical assessment

Cited by 73 publications

References 27 publications

Durability of Stabilized Earthen Constructions: A Review

Durability of Stabilized Earthen Constructions: A Review

Advances in the Use of Biological Stabilisers and Hyper-compaction for Sustainable Earthen Construction Materials

Modifying Mechanical Strength and Capillary Porosity of Portland Cement-Based Mortar Using a Biosurfactant from Pseudomonas fluorescens

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