Effect of clay content on plastic shrinkage cracking of cementitious materials

Zhao, Haixin; Ma, Yuefeng; Zhang, Jian; Hu, Zhaoyang; Li, Hua; Wang, Yujiang; Liu, Jiaping; Li, Zhen

doi:10.1016/j.conbuildmat.2022.127989

Cited by 14 publications

(4 citation statements)

References 50 publications

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“…Many research studies have revealed that mechanical properties such as suction, surface energy, and tensile strength can largely determine the desiccation cracking process of clayey saline soils, which are mainly affected by physical-chemical properties of salt-affected soils including the clay mineral types, the clay contents, and the salinity levels [57][58][59][60]. However, both mineral type and clay content were not found to determine the desiccation cracking process of salt-affected soil in the Songnen Plain, China.…”

Section: Effects Of Salinity On the Desiccation Cracking Processmentioning

confidence: 99%

Quantitative Study on Salinity Estimation of Salt-Affected Soils by Combining Different Types of Crack Characteristics Using Ground-Based Remote Sensing Observation

Zhang

Zhou

et al. 2023

Remote Sensing

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Soil salinity is one of the parameters used for determining the extent of soil salinization. During water evaporation, the surface of salt-affected soils in the Songnen Plain, China, exhibits obvious shrinkage and cracking phenomena due to the high salt content. The aim of this current study is to quantify the influence of the salt content on the surface shrinkage–cracking process and to achieve quantitative extraction of soil salinity parameters based on different crack parameter types. In order to achieve the above objectives, a controlled shrinkage–cracking experiment was conducted. Subsequently, three kinds of crack characteristics such as crack length, box-counting dimension, and 12 gray-level co-occurrence matrix (GLCM) texture features were quantitatively extracted from the standard binary crack patterns. In order to predict the soil physical–chemical properties of salt-affected soils in the Songnen Plain, three models such as multiple linear regression (MLR), multiple stepwise regression (MSR), and artificial neural network (ANN) were developed and compared based on the crack length, box-counting dimension, and the first two principal components of GLCM texture features. The results show that the extent of desiccation cracks was determined by soil salinity since the water film caused by exchangeable cations and the thickness of DDL determined by soil salinity can promote desiccation cracking. Although the three methods have high prediction accuracy for Na+, electrical conductivity (EC), and total soil salinity, the ANN-based method showed the best prediction with R2 values for Na+, EC, and soil salinity as high as 0.91, 0.91, and 0.89, and ratio of performance to deviation (RPD) values for Na+, EC, and soil salinity corresponding to 2.96, 3.47, and 2.95.

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Section: Effects Of Salinity On the Desiccation Cracking Processmentioning

confidence: 99%

Quantitative Study on Salinity Estimation of Salt-Affected Soils by Combining Different Types of Crack Characteristics Using Ground-Based Remote Sensing Observation

Zhang

Zhou

et al. 2023

Remote Sensing

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“…Desiccation cracking of clayey soil is closely related to the physical and chemical properties of soil, and is also influenced by other natural and laboratory conditions such as soil temperature, humidity, dry wet cycle, and sample preparation. Specifically, Zhao et al [10] studied the effect of clay content on shrinkage cracking of cohesive soil, their results indicate that clay considerably mitigates the plastic settlement while significantly aggravates the plastic shrinkage and generates more severe cracking. After measuring the contents of illite, kaolinite and montmorillonite for five different types of expansive clayey soils, Puppala et al [11] turned out clay minerals can affect swell-shrinkage cracking desiccation cracking due to their different plasticity indexes.…”

Section: Introductionmentioning

confidence: 99%

Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China

Zhang

Ren

et al. 2023

Agriculture

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The surface of cohesive soda saline-alkali soil in the Songnen Plain of China exhibits obvious desiccation cracking phenomenon during water evaporation. Quantitative research on the process and influencing factors of desiccation cracking are significant for determining the mechanical properties of salt-affected soil, improving the salinization status and the local ecological environment. This study aims to conduct laboratory-controlled cracking experiments on soda saline-alkali soils, and to regularly measure the soil moisture and the cracking status of 40 soil samples. After processing the crack images uniformly, crack characteristics including crack length, crack area, contrast texture feature, and box-counting fractal dimension are extracted. The results indicate that the decrease in soil moisture can be divided into three stages such as fast evaporation stage, slow evaporation stage and stable evaporation stage, and that the evaporation rate shows a linear negative correlation with soil salinity. The measurements also indicate that crack length rapidly increases and reaches stability with a decrease in water content compared with the crack area. The high correlation between different crack characteristics and the soil total salinity (correlation coefficient from 0.44 to 0.95) shows that salt content is the dominant factor affecting the desiccation cracking of soda saline-alkali soil. A multiple linear regression prediction model was finally established based on crack characteristics for different salinity parameters with high prediction accuracy for Na+, EC and total salinity (R2 > 0.91 and RPD > 2.5) and also certain prediction accuracy for Cl− and CO32− (R2 > 0.66 and RPD > 1.5).

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“…Mineral katkıların etkisine bakılacak olursa mikro silika ve nano silika kullanımı su ihtiyacını artırdığı ve negatif kapiler basıncın daha erken oluşmasına neden olduğu için PRÇ riskini artırırken [19]- [21], su ihtiyacını azaltan ve priz süresini uzatan uçucu külün kullanımı PRÇ riskini azaltmıştır [22]. Benzer şekilde karışıma mineral katkı olarak kil eklenmesi de su ihtiyacını artırdığı için PRÇ oluşumunu ciddi bir oranda artırmıştır [23]. Diğer yandan, su/bağlayıcı oranının düşmesi ile priz süresi kısalmakta ve terleme miktarı azalmaktadır bu durum da PRÇ riskini artırmaktadır [9], [24].…”

Section: Introductionunclassified

Agrega Tane Boyut Dağılımı ve PP Lif Kullanımının Betonda Plastik Rötre Çatlağı Oluşumu Üzerine Etkileri

Turkmenoglu

Atahan

2022

DÜMF MD

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Plastik rötre betonun henüz sertleşmediği zaman diliminde meydana gelen yüzeysel bir çatlak türüdür. Temel nedeni beton yüzeyindeki buharlaşma hızının betonun terleme hızından yüksek olmasına bağlı olarak yüzeyin kurumasıdır. Böylece beton yüzeyi büzülmeye başlarken, alt kısımlarda kalan beton plastik kıvamda olduğu için yüzey ile benzer büzülmeyi gösteremez ve yüzeyde harita şeklinde çatlaklar oluşur. Yapılan çalışmada, toplam agrega hacminin sabit olduğu 3 farklı agrega dağılımına sahip beton ve 2 farklı polipropilen lif değişik oranlarda kullanılarak plastik rötre üzerine etkileri incelenmiştir. Deneylerde yöntem olarak ASTM C1579 standardı esas alınmış olup çatlak parametreleri deney sırasında çekilen fotoğraflar işlenerek elde edilmiştir. Elde edilen sonuçlar daha iri agrega dağılımının çatlak oluşumunu önlemede daha başarılı olduğunu ortaya koymuştur. Fakat çatlağı önlemek için kullanılan liflerin etkinliği agrega dağılımı irileştikçe azalmıştır. Diğer yandan kullanılan lifler plastik rötre çatlağını belirgin bir şekilde engellemişlerdir fakat aynı boydaki liflerden narinliği daha yüksek olan monofilament lifin kullanıldığı betonlardan daha iyi sonuçlar elde edilmiştir.

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Effect of clay content on plastic shrinkage cracking of cementitious materials

Cited by 14 publications

References 50 publications

Quantitative Study on Salinity Estimation of Salt-Affected Soils by Combining Different Types of Crack Characteristics Using Ground-Based Remote Sensing Observation

Quantitative Study on Salinity Estimation of Salt-Affected Soils by Combining Different Types of Crack Characteristics Using Ground-Based Remote Sensing Observation

Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China

Agrega Tane Boyut Dağılımı ve PP Lif Kullanımının Betonda Plastik Rötre Çatlağı Oluşumu Üzerine Etkileri

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