A Review on Chemical and Autogenous Shrinkage of Cementitious Systems

Ghanem, Hassan; Ramadan, Rawan; Khatib, Jamal; Elkordi, Adel

doi:10.3390/ma17020283

Cited by 16 publications

(4 citation statements)

References 136 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, the UL characterizes the maximum magnitude of shrinkage or expansion, signifying the material's long-term behavior after attaining a consistent moisture content. A hyperbolic model [44] was employed to encompass and analyze these critical parameters (Figure 4). The equation is as follow:…”

Section: Estimation Of Length Changementioning

confidence: 99%

Effect of Adding Phragmites-Australis Fiber on the Mechanical Properties and Volume Stability of Mortar

Khatib,

Ramadan,

Ghanem

et al. 2024

Fibers

Self Cite

View full text Add to dashboard Cite

In this research, the investigation focuses on the influence of Phragmites-Australis (PA) fibers on the mechanical properties and volume stability of mortar. A total of four mixtures were employed with varying amounts of locally sourced PA fibers ranging from 0.5% to 2% (by volume). Testing includes flexural strength, compressive strength, chemical shrinkage, drying shrinkage, autogenous shrinkage, and expansion. The findings show that the use of PA fibers caused a reduction in compressive and flexural strength. However, beyond 3 days of curing, an increase in flexural strength ranging from 7 to 21% was observed at 1% PA fiber compared to the control sample. Furthermore, the addition of PA fibers up to 2% effectively mitigates the dimensional stability of mortar samples. A gradual decrease in chemical, autogenous, and drying shrinkage as well as expansion occurs in mortar samples when % of PA fibers increases. At 180 days, this reduction was 37, 19, 15 and 20% in chemical shrinkage, autogenous shrinkage, drying shrinkage, and expansion, respectively, for a mix containing 2% PA fiber. Additionally, a hyperbolic model is proposed to predict the variation of length change with time. Also, a strong relationship is observed between chemical shrinkage and other length change parameters. Consequently, the environmentally friendly utilization of PA fibers demonstrates its potential to significantly enhance mortar durability in construction applications.

show abstract

Section: Estimation Of Length Changementioning

confidence: 99%

Effect of Adding Phragmites-Australis Fiber on the Mechanical Properties and Volume Stability of Mortar

Khatib,

Ramadan,

Ghanem

et al. 2024

Fibers

Self Cite

View full text Add to dashboard Cite

show abstract

“…The IRLC denotes the pace of shrinkage or expansion during the initial phases of volume change due to moisture loss or absorption, while the ULC indicates the maximum expected value of shrinkage or expansion after reaching a stable moisture content level. To analyze those crucial parameters and to determine the length change (CH-S, DR-S, AU-S, and EXP) with time, a hyperbolic model (Figure 5) was used as follows [35,36]:…”

Section: Estimation Of Length Change Parametersmentioning

confidence: 99%

Volume Stability and Mechanical Properties of Cement Paste Containing Natural Fibers from Phragmites-Australis Plant at Elevated Temperature

Ghanem,

Ramadan,

Khatib

et al. 2024

Buildings

Self Cite

View full text Add to dashboard Cite

The utilization of bio-fiber materials in building components has become imperative for improving sustainability, controlling global warming, addressing environmental concerns, and enhancing concrete properties. This study is part of a wide-range investigation on the use of Phragmites-Australis (PhA) fibers in construction and building materials. In this paper, the volume stability and mechanical properties of paste containing PhA fibers and exposed to high temperatures were investigated. Four mixes were made with 0, 0.5, 1, and 2% fibers by volume. To evaluate the volume stability and mechanical properties, the chemical shrinkage, autogenous shrinkage, drying shrinkage, expansion, ultrasonic pulse velocity, compressive strength, and flexural strength were tested. The curing duration and temperature were 180 days and 45 °C, respectively. The results indicated that an addition of PhA fibers of up to 2% resulted in a reduction in all the shrinkage parameters at 180 days. The presence of PhA fibers in the paste tended to reduce the compressive strength, with the lowest value observed at 2%. Apart from the values at 90 days, the optimal flexural strength seemed to be achieved by the paste with 1% PhA fibers. To further elucidate the experimental results, a hyperbolic model was employed to predict the variation in the length change as a function of the curing age with a high accuracy. Based on the results obtained, PhA fibers can play a crucial role in mitigating the shrinkage parameters and enhancing the mechanical properties of cement paste.

show abstract

“…Extensive research has been conducted to address autogenous shrinkage in cementbased materials, exploring supplementary cementitious materials, chemical admixtures, mix design variations, and controlled curing conditions [7][8][9][10][11]. For a detailed discussion of mitigation techniques for autogenous shrinkage in ultra-high-performance concrete, readers are referred to [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Glass Microfibers on the Control of Autogenous Shrinkage in Very High Strength Self-Compacting Concretes (VHSSCC)

Onghero,

Souza,

Cusson

et al. 2024

J. Compos. Sci.

View full text Add to dashboard Cite

High-performance concrete (HPC) is widely used in infrastructure for its durability and sustainability benefits. However, it faces challenges like autogenous shrinkage, leading to potential cracking and reduced durability. Fiber reinforcement offers a solution by mitigating shrinkage-induced stresses and enhancing concrete durability. In this sense, this study investigates the use of glass microfibers to mitigate autogenous shrinkage and early-age cracking in high-strength self-compacting concrete. Samples were prepared with two water-to-binder ratios (w/b): 0.25 and 0.32; and three glass microfiber contents: 0.20%, 0.25%, and 0.30 vol.%. The concrete mixtures were characterized in the fresh state for slump flow and in the hardened state for compressive strength, static, and dynamic Young’s modulus. Unrestrained and restrained shrinkage tests were also conducted in the seven days-age. The findings revealed that glass microfibers reduced the workability in mixtures with lower slump flow values (w/b of 0.25), while less viscous mixtures (w/b of 0.32) exhibited a slight improvement. Compressive strength showed a proportional enhancement with increasing fiber contents in concretes with a w/b ratio of 0.32. A contrasting trend emerged in concretes with a w/b ratio of 0.25, wherein strength diminished as fiber additions increased. The modulus of elasticity improved with fiber additions only in the matrix with a w/b ratio of 0.25, showing no correlation with compressive strength results. In shrinkage tests, the addition of glass microfibers up to specific limits (0.20% for a w/b ratio of 0.25 and 0.25% for w/b of 0.32) demonstrated improvements in controlling concrete deformation in unrestrained shrinkage analyses. Concerning cracking reduction in restrained concrete specimens, the mixtures did not exhibit significant improvements in crack prevention.

show abstract

A Review on Chemical and Autogenous Shrinkage of Cementitious Systems

Cited by 16 publications

References 136 publications

Effect of Adding Phragmites-Australis Fiber on the Mechanical Properties and Volume Stability of Mortar

Effect of Adding Phragmites-Australis Fiber on the Mechanical Properties and Volume Stability of Mortar

Volume Stability and Mechanical Properties of Cement Paste Containing Natural Fibers from Phragmites-Australis Plant at Elevated Temperature

Influence of Glass Microfibers on the Control of Autogenous Shrinkage in Very High Strength Self-Compacting Concretes (VHSSCC)

Contact Info

Product

Resources

About