Review of Mechanical and Temperature Properties of Fiber Reinforced Recycled Aggregate Concrete

Yao, Xinglong; Pei, Zhiyang; Zheng, Haoyuan; Guan, Qizhou; Wang, Fupeng; Wang, Shuo; Ji, Yongcheng

doi:10.3390/buildings12081224

Cited by 16 publications

(5 citation statements)

References 101 publications

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“…In our case, the greatest ré sistance is recorded with steel fibers concrete at 600℃. Similar results were observed by Serafini et al [40] and cited by Yao et al [41]. To better understand the mechanical behavior of lightweight fiber-based concrete specimens, mechanical compressive strength tests are carried out, in which the fibers do not play an important role in the compressive strength but the fibers contribute to the tensile strength.…”

Section: Loss Of Masssupporting

confidence: 80%

Assessment of the Durability Against a Chemical Attack of Fiber-Reinforced Lightweight Pouzzolanic Concrete under the Effect of Temperature

Belhadj¹,

Tenza-Abril²,

Mahi³

2023

ACSM

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The study of the durability of Fiber-Reinforced Lightweight Pouzzolanic Concrete (FRLPC) is a topic of research that focuses on evaluating the skills of FRLPC, because exposure to certain chemicals can cause deterioration and reduce the lifespan of the concrete. Chemical attacks can occur due to exposure to acids, sulfates, and other substances commonly found in the environment. The work presented here aims to analyze the influence of different types of fibers on the behavior of lightweight concretes (LWC) based on pozzolanic aggregates in aggressive media such as acids and under the effect of temperatures. The choice of pozzolanic aggregates is to valorize natural pozzolan as lightweight aggregates in concrete, knowing that this material is abundant in Algeria. In this sense, different tests have been carried out using metal, polyethylene, and polypropylene fibers in LWC manufactured with pozzolanic aggregates. The LWC specimens were kept in water saturated with lime until the age of testing (28, 60, and 90 days). Then, the specimens were subjected to heating under two temperatures (200°C and 600°C). After cooling, the specimens were exposed to hydrochloric acid (Hcl) and sulfuric acid (H2SO4) solutions (5% w/w). The evaluation of the durability of these concretes and the mechanical behavior was obtained by the measurement of the mass loss and the compressive strength.

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Section: Loss Of Masssupporting

confidence: 80%

Assessment of the Durability Against a Chemical Attack of Fiber-Reinforced Lightweight Pouzzolanic Concrete under the Effect of Temperature

Belhadj¹,

Tenza-Abril²,

Mahi³

2023

ACSM

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“…A freezing and thawing environment leads to the expansion of internal pores and microcracks in the mortar, and ultimately, the specimen surface cracks through and spalls. After adding basalt fibers, the fibers are irregularly distributed in the mortar, forming a three-dimensional spatial mesh structure, which can inhibit the development of internal cracks in the mortar and can offset a portion of the freezing and expansion force generated by water icing, effectively improving the frost resistance of walnut shell mortar [64][65][66]. The freeze-thaw damage of mortar generally results from many factors.…”

Section: Change In the Relative Dynamic Modulus Of Elasticity Of The ...mentioning

confidence: 99%

Experimental Study on the Durability Performance of Sustainable Mortar with Partial Replacement of Natural Aggregates by Fiber-Reinforced Agricultural Waste Walnut Shells

Peng,

Qiu,

Yang

et al. 2024

Sustainability

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Through the recovery and reuse of agricultural waste, the extraction and consumption of natural aggregates can be reduced to realize the sustainable development of the construction industry. Therefore, this paper utilizes the inexpensive, surplus, clean, and environmentally friendly waste agricultural material walnut shell to partially replace the fine aggregates in mortar to prepare environmentally friendly mortar. Considering the decrease in mortar performance after mixing walnut shells, basalt fibers of different lengths (3 mm, 6 mm, and 9 mm) and different dosages (0.1%, 0.2%, and 0.3%) were mixed in the mortar. The reinforcing effect of basalt fibers on walnut shell mortar was investigated by mechanical property tests, impact resistance tests, and freeze–thaw cycle tests. The damage prediction model was established based on the Weibull model and gray model (GM (1,1) model), and the model accuracy was analyzed. The experimental results showed that after adding basalt fibers, the compressive strength, split tensile strength, and flexural strength of the specimens with a length of 6 mm and a doping amount of 0.2% increased by 13.98%, 48.15%, and 43.75%, respectively, and the fibers effectively improved the defects inside the walnut shell mortar. The R²s in the Weibull model were greater than 87.38%, and the average relative error between the predicted life of the impacts and the measured values was greater than 87.38%. The average relative errors in the GM (1,1) model ranged from 0.81% to 2.19%, and the accuracy analyses were all of the first order.

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“…For example, Jiao et al [16] found that a content of BF not higher than 1% can significantly improve the mechanical properties of recycled aggregate concrete. Yao et al [17] also carried out similar research based on recycled concrete. The results show that fiber can significantly improve the flexural and tensile strength of recycled concrete, but has little effect on compressive strength.…”

Section: Introductionmentioning

confidence: 97%

Study on the Modification Effect and Mechanism of a Compound Mineral Additive and Basalt Fiber on Coal Gangue Concrete

Qiu,

Huo,

Feng

et al. 2023

Buildings

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Compared with ordinary concrete, coal gangue concrete (CGC) is limited by its poor mechanical properties and frost resistance, which seriously restricts its wide application in cold regions. In order to improve the resource utilization rate of coal gangue, this paper takes advantage of the ‘overlapping effect’, ‘micro-aggregate filling effect’ and ‘volcanic ash effect’ of fly ash (FA) and silica fume (SF) and the anti-cracking effect of basalt fiber (BF) to study their effects on the macro performance of CGC and the micro modification mechanism. Modified CGC was prepared by replacing cement with 20% total mineral additives and adding BF. Taking different fly ash and silica fume incorporation ratios (F/S) and the BF content as variables, the research was carried out from two scales of macro performance and microstructure. The results show that the mechanical properties and frost resistance of CGC can be significantly improved by adding mineral additives and BF, and the modification effect is better with a decrease in F/S. When F/S = 1, the compressive strength, splitting tensile strength and flexural strength of the specimens increased by 13.73%, 8.37% and 4.27%, respectively. After 300 freeze–thaw cycles, the specimen was still not damaged by freezing and thawing. At the same time, keeping F/S = 3 unchanged and changing the BF content, it was found that the optimal content of BF was 0.15 vol% under the combined action of BF, FA and SF. In terms of microstructure, the addition of mineral additives and BF segregates and fills the macropores in the structure, greatly reducing the harmful pores and turning them into harmless and less harmful pores. When F/S = 1, the number of multi-harmful pores decreased by 16.89%, and the number of harmless pores and less harmful pores increased by 9.19%, which greatly optimized the pore structure and pore gradation.

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Review of Mechanical and Temperature Properties of Fiber Reinforced Recycled Aggregate Concrete

Cited by 16 publications

References 101 publications

Assessment of the Durability Against a Chemical Attack of Fiber-Reinforced Lightweight Pouzzolanic Concrete under the Effect of Temperature

Assessment of the Durability Against a Chemical Attack of Fiber-Reinforced Lightweight Pouzzolanic Concrete under the Effect of Temperature

Experimental Study on the Durability Performance of Sustainable Mortar with Partial Replacement of Natural Aggregates by Fiber-Reinforced Agricultural Waste Walnut Shells

Study on the Modification Effect and Mechanism of a Compound Mineral Additive and Basalt Fiber on Coal Gangue Concrete

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