Mechanical Performance and Durability of Latex-Modified Fiber-Reinforced Concrete

Truong, Gia Toai; Son, Min-Kyoung; Choi, Kyoung‐Kyu

doi:10.3151/jact.17.79

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…In the process of freeze-thaw cycle, the water in the pores of porous materials will produce the transformation of the liquid phase and the gas phase. The heat conduction equation of water phase's latent heat is as follows [15]:…”

Section: Governing Differential Equations Of Freeze Thaw Cyclesmentioning

confidence: 99%

Numerical Simulation of the Effect of Freeze–Thaw Cycles on the Durability of Concrete in a Salt Frost Environment

Zhang²,

Guo

2021

Coatings

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In order to improve the accuracy of the analysis of the impact of freeze–thaw cycle on concrete durability in a salt freezing environment, the numerical simulation of the impact of the freeze–thaw cycle on concrete durability in a salt freezing erosion environment is studied in this paper. Firstly, considering the influence of axial force and bending moment on the relationship between bending moment and curvature, a concrete fiber beam column model is established. Then, according to the joint influence of temperature field, stress field and seepage field on concrete in the process of freezing and thawing, the control differential equation of the freezing and thawing cycle is established. The freeze–thaw damage section is divided, the non-uniform distribution of freeze–thaw damage is determined, and the division of the freeze–thaw damage section is completed. According to the linear relationship between freeze–thaw damage degree, relative dynamic elastic modulus, freeze–thaw cycle times and position variables, the durability of concrete is numerically simulated, and the attenuation law of bond strength at different section depths after freeze–thaw is determined. The results show that the temperature curve simulated by the design method is consistent with the actually measured temperature curve, which can better reduce the temperature change of the inner core of the test block during freezing and thawing, and the relative dynamic elastic modulus is in good agreement with the actual value, which can prove that the method in this paper has certain practical application value. It is expected to provide some reference for solving the durability problem of concrete in a salt frost erosion environment and the optimal design of concrete structures.

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Section: Governing Differential Equations Of Freeze Thaw Cyclesmentioning

confidence: 99%

Numerical Simulation of the Effect of Freeze–Thaw Cycles on the Durability of Concrete in a Salt Frost Environment

Zhang²,

Guo

2021

Coatings

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“…In another study, Truong et al [14] reported that the use of 15% polymer improved the compressive strength at an early age, with a 91% ratio of compressive strength at day 7 to that of day 28. Additionally, the time until the development of cracks was delayed, and the final crack value was reduced.…”

Section: Introductionmentioning

confidence: 96%

Effect of Polymer SBR on Strength Reduction in Concrete Immersed in Drainage and Ground Water

Jameel¹,

Noaman²,

Al-Hadithi³

et al. 2021

AJES

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Concrete structures suffer from the impact of many harmful attacking materials that affect the properties of the main material in them, which is concrete. These structures are also, exposed to the negative impact of many hostile environments such as soils containing harmful salts and harmful acids. A number of precautions should be considered in order to protect the concrete used in such structures. Adding polymer to concrete components as a percentages weight of cement is one of the methods for producing polymer-modified concrete, which has low permeability, better mechanical properties and is more resistant to the negative effects of harmful environmental factors. The utilization of polymers could help in protecting structures and enhancing concrete strength. In this study, concrete mixes were prepared with inclusion of styrene butadiene rubber (SBR) polymer at four percentages (0%, 5%, 7% and 10% by cement weight). Co-polymers of butidine with styrene (styrene-butadine rubber (SBR)), are a group of large-volume synthetic rubbers. High adhesion occurs between the polymer films that form and cement hydrates. This action gives improves the properties of concrete such as flexural and compressive strength and gives also a higher durability. The investigation was extended to evaluate the compressive strength of the SBR concrete mixes immersed in three types of waters: tap, drainage and ground water, at three different ages. The results showed that SBR polymer enhanced the compressive strength of concrete significantly. A comparison between reduction in strength of concretes immersed in these three types of waters was also presented. Moreover, the presence of SBR polymer led to reduced loss in strength of concrete specimens immersed in drainage and ground water. A proposed model to determine the compressive strength of concrete specimens immersed in drainage and ground waters was deduced. This model could be a helpful tool for rapid and easy estimation of the strength of concrete specimens immersed in drainage and ground water at different contents of SBR polymer. The results showed the highest improve in compressive strength to be associated with 7% SBR mixes at the three tested ages. The increases in this strength at days 7, 28 and 56 with inclusion of 7% SBR polymer were 112. 8%, 113.9% and 116%, respectively, compared to OPC mix.

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“…Preventive measures must be implemented to improve the longevity of concrete pavements and structures and improve the life cycle performance. Latex based polymeric materials are added to concrete to improve its performance in particular applications for increasing its resilience and durability [1], [2], [3]. The use of tailor-made synthetic rubber latex in major infrastructure projects is widely accepted.…”

Section: Introductionmentioning

confidence: 99%

Natural Rubber Latex Modified Concrete for Resilient Construction

MATHEW,

Joseph

2024

Preprint

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Major infrastructure projects often demand high performance concrete with properties such as high flexural strength, toughness, resistance to abrasion and high durability. Polymer modified concrete facilitates to enhance the flexural strength and serviceability of concrete structures. In this study, the potential of Natural Rubber Latex (NRL), a natural polymer, as an alternative to synthetic latex for enhancing the performance characteristics of concrete is explored. Natural rubber latex is added in concrete to incorporate dry rubber content of 0.5–2% by weight of cement in the mixture composition. A comparison of latex modified concrete is made with polypropylene and basalt fibre-reinforced concrete and the hybrid effect of fibre and latex in concrete. Results indicated a significant increase in energy absorption capacity (up to 231%) due to impact loading and reduction in wear in addition to the improvement in flexural strength with the modification of concrete using latex. Reduced chloride ion permeability and water absorption of latex modified concrete is indicative of highly durable concrete. Microstructure investigation confirmed a dense matrix for the NRL modified concrete making it a promising solution for structures in aggressive environments and pavement construction.

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Mechanical Performance and Durability of Latex-Modified Fiber-Reinforced Concrete

Cited by 10 publications

References 32 publications

Numerical Simulation of the Effect of Freeze–Thaw Cycles on the Durability of Concrete in a Salt Frost Environment

Numerical Simulation of the Effect of Freeze–Thaw Cycles on the Durability of Concrete in a Salt Frost Environment

Effect of Polymer SBR on Strength Reduction in Concrete Immersed in Drainage and Ground Water

Natural Rubber Latex Modified Concrete for Resilient Construction

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