Durability evaluation of PP-ECC with local superfine sand (SSPP-ECC) serviced in seasonal frozen region

Tan, Guojin; Zhu, Zhouting; Wang, Wensheng; He, Xin; Zhang, Sufeng; Wei, Xueliang; Wan, Feihong

doi:10.1016/j.conbuildmat.2022.130278

Cited by 6 publications

(3 citation statements)

References 57 publications

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“…In fact, the rheology of the paste is important for uniform fiber distribution to obtain the desired mechanical properties. In this study, the addition of superfine quartz sand and the adoption of HRWRA made it possible to test higher levels of fiber content, i.e., 2.5% and 3.0%, in ECC (Ehrenbring et al, 2022;Hou et al, 2022;Tan et al, 2023).…”

Section: Design Of the MIX Proportionmentioning

confidence: 99%

An experimental study and axial tensile constitutive model of the toughness of PP-SACC for rapid repairs

Xie¹,

et al. 2023

Front. Built Environ.

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To improve the economic benefits of engineered cementitious composites and control the repair cycle, repair materials were designed, with the key components of the mixture being low-cost polypropylene (PP) fibers and fast-setting sulfoaluminate cement. The effects of water/binder ratio, fiber content, and aggregate particle size on the flowability, mechanical properties, and toughness of the polypropylene fiber-reinforced sulfoaluminate cementitious composite (PP-SACC) were explored. Based on experimentally measured axial tensile stress–strain curves, a constitutive model of PP-SACC was derived in terms of fiber content and water/binder ratio. Additionally, the correlation coefficients representing the relationships of the mixture indices with the tensile properties were explored based on revised gray relational analysis. Test results indicated that fiber content and water/binder ratio were the most important factors affecting the mechanical properties, toughness, and fluidity of the material; in contrast, the influence of aggregate size was slight. The PP-SACC mixture with an aggregate size of 75 µm, a water/binder ratio of 0.30, and a fiber content of 3.0% demonstrated an excellent degree of toughness and exhibited a flexural hardening phenomenon under bending load.

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Section: Design Of the MIX Proportionmentioning

confidence: 99%

An experimental study and axial tensile constitutive model of the toughness of PP-SACC for rapid repairs

Xie¹,

et al. 2023

Front. Built Environ.

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“…One line of research has investigated the relationship between mechanical properties and freeze–thaw damage in concrete [ 16 ]. Previous studies have shown that the compressive strength, elastic modulus, and other properties of concrete decrease with freezing–thawing [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Freeze–Thaw Damage Characteristics of Concrete Based on Compressive Mechanical Properties and Acoustic Parameters

Lv,

Liu,

et al. 2024

Materials

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Concrete is a versatile material widely used in modern construction. However, concrete is also subject to freeze–thaw damage, which can significantly reduce its mechanical properties and lead to premature failure. Therefore, the objective of this study was to assess the laboratory performance and freeze–thaw damage characteristics of a common mix proportion of concrete based on compressive mechanical tests and acoustic technologies. Freeze–thaw damage characteristics of the concrete were evaluated via compressive mechanical testing, mass loss analysis, and ultrasonic pulse velocity testing. Acoustic emission (AE) technology was utilized to assess the damage development status of the concrete. The outcomes indicated that the relationships between cumulative mass loss, compressive strength, and ultrasonic wave velocity and freeze–thaw cycles during the freezing–thawing process follow a parabola fitting pattern. As the freeze–thaw damage degree increased, the surface presented a trend of “smooth intact surface” to “surface with dense pores” to “cement mortar peeling” to “coarse aggregates exposed on a large area”. Therefore, there was a rapid decrease in the mass loss after a certain number of freeze–thaw cycles. According to the three stages divided by the stress–AE parameter curve, the linear growth stage shortens, the damage accumulation stage increases, and the failure stage appears earlier with the increase in freeze–thaw cycles. In conclusion, the application of a comprehensive understanding of freeze–thaw damage characteristics of concrete based on compressive properties and acoustic parameters would enhance the evaluation of the performance degradation and damage status for concrete structures.

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“…Concrete is a widely used building material due to its high compressive strength, durability, and low cost [ 1 , 2 , 3 , 4 ]. However, traditional concrete has poor permeability, which leads to issues such as water accumulation, cracking, and spalling [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Pervious Concrete with Ceramsite as Aggregate Considering Mechanical Properties, Permeability, and Durability

Gao

Huang²,

Chu

et al. 2023

Materials

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Concrete with light weight and pervious performance has been widely recognized as an effective and sustainable solution for reducing the negative impacts of urbanization on the environment, as it plays a positive role in urban road drainage, alleviating the urban heat island effect and thermal insulation, as well as seismic performance, etc. This research paper presents a feasibility study of pervious concrete preparation with ceramsite as aggregate. First, pervious concrete specimens with different types of aggregates at various water–cement ratios were prepared, and the mechanical properties of pervious concrete specimens were evaluated based on the compressive strength test. Then, the permeability properties of the pervious concrete specimens with different types of aggregates at various water–cement ratios were characterized. Meanwhile, statistical analysis and regression fitting were conducted. Finally, the analysis of the freeze–thaw durability of pervious concrete specimens with ceramsite as aggregate according to indexes including quality loss rate and strength loss rate was performed. The results show that as the water–cement ratio increased, the compressive strength and permeability coefficient of pervious concrete generally decreased. Compressive strength and permeability coefficient showed a great correlation with the water–cement ratio; the R2 values of the models were around 0.94 and 0.9, showing good regression. Compressive strength was mainly provided by the strength of the aggregates, with high-strength clay ceramsite having the highest 28-day compressive strength value, followed by ordinary crushed-stone aggregates and lightweight ceramsite. Porosity was mainly influenced by the particle size and shape of the aggregates. Lightweight ceramsite had the highest permeability coefficient among different types of cement-bound aggregates, followed by high-strength clay ceramsite and ordinary crushed-stone aggregates. The quality and compressive strength of pervious concrete specimens decreased with the increase in freeze–thaw cycles; the quality loss was 1.52%, and the compressive strength loss rate was 6.84% after 25 freeze–thaw cycles. Quadratic polynomial regression analysis was used to quantify the relationship of durability and freeze–thaw cycles, with R2 of around 0.98. The results provide valuable insights into the potential applications and benefits of using ceramsite as an aggregate material in pervious concrete for more sustainable and durable infrastructure projects.

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Durability evaluation of PP-ECC with local superfine sand (SSPP-ECC) serviced in seasonal frozen region

Cited by 6 publications

References 57 publications

An experimental study and axial tensile constitutive model of the toughness of PP-SACC for rapid repairs

An experimental study and axial tensile constitutive model of the toughness of PP-SACC for rapid repairs

Freeze–Thaw Damage Characteristics of Concrete Based on Compressive Mechanical Properties and Acoustic Parameters

Feasibility Study of Pervious Concrete with Ceramsite as Aggregate Considering Mechanical Properties, Permeability, and Durability

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