Strength and Microstructure of Cement Stabilized Clay

Horpibulsuk, Suksun

doi:10.5772/35225

Cited by 33 publications

(14 citation statements)

References 31 publications

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“…In addition, specimens with fly ash showed less freeze-thaw resistance. Similar findings were obtained from the results of a stabilization study concerning performance of clay -cement -fly ash mixtures [15].…”

Section: Effect Of Admixture Contentsupporting

confidence: 87%

Mechanical Behavior of Fly Ash or Cement Amended Sand-Bentonite Mixtures Exposed to Freeze-Thaw Action After Long Curing

Sezer

Tanrınıan²,

Adamcil³

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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In construction of landfills, embankments and transportation structures, use of clay-sand mixtures are commonly preferred. To provide stability and enhance engineering properties, stabilization with chemical admixtures is a reasonable approach. Unfortunately, freeze-thaw effect is a significant problem controlling the mechanical behavior of soils in cold regions. Since past studies on strength behavior of clay-sand mixtures stabilized using fly ash or cement exposed to freeze-thaw action is limited, in this study, an experimental framework was used to investigate the effects of clay content, admixture type, number of freeze-thaw cycles on strength of clay-sand mixtures including pozzolanic cement or class C fly ash. Sand specimens including 4, 8, 12 and 16% bentonite by weight were stabilized with 3, 6, 9 % pozzolanic cement and 5, 10, 15 and 20 % class C fly ash by weight, specimens were prepared at optimum water content of mixtures. The specimens were then subjected to 1, 3 and 10 freeze-thaw cycles after 28 days of curing period. Freeze-thaw resistance of specimens was determined by carrying out unconfined compression tests. Experimental results revealed that, under certain curing conditions, cement and fly ash stabilization positively affects the strength of sand-bentonite mixtures and dominates the negative effects of freeze-thaw action. As expected, specimens stabilized with pozzolanic cement provided higher freeze-thaw resistance compared to those amended with fly ash. Besides, analysis of secant modulus values revealed that, cement stabilized specimens showed a more rigid behavior after freeze-thaw action.

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Section: Effect Of Admixture Contentsupporting

confidence: 87%

Mechanical Behavior of Fly Ash or Cement Amended Sand-Bentonite Mixtures Exposed to Freeze-Thaw Action After Long Curing

Sezer

Tanrınıan²,

Adamcil³

2017

ANADOLU UNIVERSITY JOURNAL OF SCIENCE AND TECHNOLOGY a - Applied Sciences and Engineering

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“…CEM-FA ELS (S) showed a similar distribution to ELS, slightly shifted towards smaller diameters. A shift would be expected due to formation of cementitious products coating the agglomerates and reducing inter-agglomerate mesopore diameters [40]. Conversely, CCR-FA ELS (S) showed a more uniform distribution compared to ELS with a higher concentration of macropores.…”

Section: Mercury Intrusion Porosimetry (Mip)mentioning

confidence: 91%

Reduction of rammed earth's hygroscopic performance under stabilisation: an experimental investigation

Arrigoni

Grillet

Pelosato

et al. 2017

Building and Environment

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a b s t r a c tOne of the acknowledged qualities of rammed earth (RE) is its moisture buffering capacity. Recently, stabilisation of RE has become a common practice to improve the mechanical resistance but very little is known about the effect that stabilisation has on hygroscopic properties. The present study aims to fill this gap by understanding the role that stabilisation plays in the buffering and sorption capacity of RE. The use of alternative stabilisers such as fly ash and calcium carbide residue and a comparison with traditional unstabilised RE (URE) have also been investigated. Moreover, the effect of weathering, simulated by cyclic wetting-drying, on hygroscopic performance has been analysed. Moisture Buffer Value (MBV) testing, moisture and nitrogen adsorption-desorption isotherms and mercury intrusion porosimetry were performed on stabilised samples to examine microstructural phenomena responsible for behavioural changes. URE was confirmed to be a good-to-excellent passive air conditioner according to the MBV scale but its performance seemed to be highly influenced by the soil particle size distribution and mineralogy. Based on the experimental outcomes of the mixtures investigated, stabilisation had a detrimental effect on the moisture buffer capacity of rammed earth, likely due to the inhibition of the physico-chemical interactivity between moisture and clays. Weathering had a variable effect on the buffering capacity, depending on the availability of unreacted particles in the matrix.

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“…Previous investigations found that the addition of Portland cement neither affected the OWC nor the MDD when compaction tests were per formed immediately after mixing with water [19,50]. Others found that MDD increased when clays were stabilised with cement and FA [51] and that OWC increased and MDD decreased in expansive soils stabilised with lime and FA (e.g. [52,53]).…”

Section: Optimum Moisture Content and Maximum Dry Densitymentioning

confidence: 99%

Weathering’s beneficial effect on waste-stabilised rammed earth: a chemical and microstructural investigation

Arrigoni

Pelosato

Dotelli

et al. 2017

Construction and Building Materials

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Strength and Microstructure of Cement Stabilized Clay

Cited by 33 publications

References 31 publications

Mechanical Behavior of Fly Ash or Cement Amended Sand-Bentonite Mixtures Exposed to Freeze-Thaw Action After Long Curing

Mechanical Behavior of Fly Ash or Cement Amended Sand-Bentonite Mixtures Exposed to Freeze-Thaw Action After Long Curing

Reduction of rammed earth's hygroscopic performance under stabilisation: an experimental investigation

Weathering’s beneficial effect on waste-stabilised rammed earth: a chemical and microstructural investigation

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