Novel use of calcium sulfoaluminate (CSA) cement for treating problematic soils

Pooni, J.; Robert, Dilan; Giustozzi, Filippo; Setunge, Sujeeva; Xie, Yi Min; Xia, Junwu

doi:10.1016/j.conbuildmat.2020.120433

Cited by 33 publications

(7 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Compared with OPC solidified soil, D2 is increased by 30.4%. Compared with traditional cement-based soil stabilizers [27,28], such as OPC and calcium sulfoaluminate cement (CSA), 7 days UCS value of MOC stabilized soil is the highest. erefore, in order to make the strength of the MOC solidified soil higher, MgO should not be less than 5% and the ratio of MgCl 2 to H 2 O is about 1 to 10∼15.…”

Section: Mechanical Properties Of Moc Solidified Soilmentioning

confidence: 98%

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

Wang

Zhang²,

Yan

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Due to the poor performance of ordinary Portland cement (OPC) as a solidified soil road and the large pollution in the production process, environment-friendly magnesium oxychloride cement (MOC) was used as the soil curing agent to prepare the solidified soil, exploring the optimal ratio of various raw materials when MOC is used as a curing agent. Analyzing the properties of MOC solidified soil in the application of road subgrade. This paper tests compaction, mechanical properties, and durability of the MOC solidified soil, simulates the development trend of 7 days unconfined compressive strength of MOC solidified soil, and then analyzes the hydration process and strengthens the formation mechanism of MOC in solidified soil. The study found that the addition of MOC as a curing agent to the soil can effectively improve the compaction and mechanical properties of the soil. Matlab simulation found that when the MgO content is 5.5% to 6% and the ratio of raw materials MgO, MgCl2, and H2O is 2.45 : 1 : 14 to 6.3 : 1 : 14, the performance of MOC solidified soil is excellent. Fitting UCS data, it is found that MOC solidified soil has early strength characteristics. The excellent compaction and mechanical properties of MOC solidified soil are due to the formation of a small amount of phase 5 and layered Mg(OH)2 by the hydration of MOC, and the formation of amorphous gel with SiO2 in the soil. This reaction improves soil compaction and reduces internal porosity from a microscopic perspective. The strength loss rate of MOC solidified soil is higher after immersion in water at the initial stage of curing, but it is still better than that of traditional cement-based solidified soil. Poor performance after immersion in water is associated with disruption of the network-like structure. As an environment-friendly soil curing agent, MOC can be used in engineering practice with low environmental humidity.

show abstract

Section: Mechanical Properties Of Moc Solidified Soilmentioning

confidence: 98%

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

Wang

Zhang²,

Yan

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…O Cálcio, é um elemento que age no solo com efeito cimentante ao promover a floculação das argilas (Abbaslou, Hadifard & Ghanizadeh, 2020), conforme verifica-se na Tabela 1 que o nível desse elemento no solo antes da implantação do experimento já se encontrava em valores elevados, o que pode ter contribuído para que os resíduos adicionados ao solo não incrementassem a agregação do solo. Pooni et al (2020) verificaram que a adição de material cimentante rico em cálcio e alumínio promove a estabilidade do solo, apontando três mecanismos principais: realização de trocas catiônicas, floculação e aglomeração de argilas e hidratação cimentícia.…”

Section: Atributos Físicos Do Solounclassified

Pó de rocha como condicionador de solo para o feijoeiro no norte de Minas Gerais

Alves

Sampaio

Kondo

et al. 2021

RSD

View full text Add to dashboard Cite

O feijão-comum (Phaseolus vulgaris L.) constitui um alimento básico na dieta brasileira, atuando como fonte de proteína vegetal de baixo custo. Apesar da possibilidade de ser cultivado em diferentes condições edafoclimáticas e tecnológicas, o seu cultivo em regiões de baixa fertilidade ou a ocorrência de manejo incorreto da fertilidade pode limitar a sua produtividade. Objetivou-se verificar o efeito do pó de ardósia e rocha calcária na produtividade, componentes de produção e atributos físicos do solo em área cultivada com feijoeiro comum no norte de Minas Gerais. Para isso foi instalado um experimento no delineamento de blocos casualizados com quatro repetições, adicionalmente foram incluídos dois tratamentos testemunhas. Os tratamentos consistiram de cincos doses de pó de ardósia: 0; 1,25; 2,5; 3,75 e 5,0 t.ha-1. Os tratamentos testemunhas foram constituídos da aplicação de pó de rocha calcária na dose de 1,0 t.ha-1 combinados ou não com o uso do pó de ardósia na dose de 2,5 t ha-1. O aporte de potássio e magnésio ao solo com a utilização do resíduo de ardósia pode ter contribuído com incrementos de até 11,10 e 54%, respectivamente, na massa de mil grãos e na produtividade do feijoeiro. O pó de rocha calcária não interfere na produção, e nos componentes de produção do feijoeiro. Ambos os pós de rocha testados não interferem nos atributos físicos do solo.

show abstract

“…However, in search of an alternative binder, many researchers have recently utilized industrial waste substances, such as rice husk ash, blast furnace slag, and fly ash, to enhance the engineering properties of soils 3 – 7 . Similarly, several researchers studied the importance of using sustainable cementitious materials like calcium sulfoaluminate (CSA) cement for soil improvement instead of OPC 8 – 11 , 32 – 35 .…”

Section: Introductionmentioning

confidence: 99%

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Ocheme,

Kim,

Moon

2024

Sci Rep

View full text Add to dashboard Cite

This study examines the efficacy of employing calcium sulfoaluminate (CSA) cement, an environmentally friendly binder, for enhancing the geomechanical characteristics of sand, particularly under low confining pressure conditions. A series of triaxial consolidated drained tests were performed on sand samples treated with varying content (5, 7, and 10%) of CSA cement and 10% ordinary Portland cement (OPC) under various low confining pressures (50, 100, 200, and 400 kPa). The test findings demonstrated the importance of cement content and confining pressure on the mode of failure, stress–strain and volumetric behavior, failure characteristics, and shear strength parameters of the treated quartz sand. After a curing period of 14 days, samples treated with 10% CSA cement exhibited a remarkable 212% increase in peak deviator stress and an 89% reduction in axial strain at failure, indicating higher initial stiffness compared to untreated samples under a 400 kPa confining pressure. Furthermore, the samples treated with 10% CSA exhibited higher peak deviator stress, initial stiffness, and strength development compared to those treated with 10% OPC. The scanning electron microscopy analysis provides insights into particle breakage and bond degradation processes, which increase with confining pressure in CSA-treated samples. Also, the mode of failure analysis reveals a transition from ductile to slightly brittle behavior with increasing cement content. Notably, the geomechanical properties of the treated material emphasized the significant impact of CSA cement on soil improvement. Thus offering a sustainable alternative for soil improvement in construction projects.

show abstract

Novel use of calcium sulfoaluminate (CSA) cement for treating problematic soils

Cited by 33 publications

References 62 publications

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

Pó de rocha como condicionador de solo para o feijoeiro no norte de Minas Gerais

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Contact Info

Product

Resources

About