The Optimum Replacement of Fine Recycled Concrete Aggregate on the Compressive and Splitting Tensile Strength of the Concrete

Zaki, Z.I.; Khalid, Faisal Sheikh; Guntor, Nickholas Anting Anak; Siang, Alvin John Lim Meng

doi:10.30880/ijie.2020.12.09.003

Cited by 4 publications

(4 citation statements)

References 25 publications

(45 reference statements)

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“…Direct replacement methods (DRM), either partial/full or by weight/volume, are one of the earliest attempts to mixture proportion concrete using FRCA. Studies show that a replacement ratio of less than 30% provides optimal results [29,[31][32][33]38,[42][43][44], although suitable properties were achieved using 100% replacement in some cases. Moreover, results of recycled concrete mixtures designed through DRM were verified to be extremely variable.…”

Section: Direct Replacement Methods (Drm)mentioning

confidence: 99%

“…Despite all recent advancements in recycled concrete using FRCA, when compared to conventional concrete (CC), recycled concrete mixtures designed through conventional methods using partial (over 30%) or full FRCA replacement were observed to often yield lower performance in the fresh (i.e., high consistency and low flowability) and hardened (i.e., low compressive strength and stiffness) states along with durability [11,[28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Background 21 Multi-phase Nature Of Recycled Concrete Aggreg...mentioning

confidence: 99%

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Freezing and Thawing Resistance of Fine Recycled Concrete Aggregate (FRCA) Mixtures Designed with Distinct Techniques

et al. 2022

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The pressure to use sustainable materials and adopt practices reducing the carbon footprint of the construction industry has risen. Such materials include recycled concrete aggregates (RCA) made from waste concrete. However, concrete made with RCA often presents poor fresh and hardened properties along with a decrease in its durability performance, especially when using its fine fraction (i.e., FRCA). Most studies involving FRCA use direct replacement methods (DRM) to proportion concrete although other techniques are available such as the Equivalent Volume (EV) and Particle Packing Models (PPMs); yet their impact on the durability performance, especially its performance against freezing and thawing (F/T), remains unknown. This work, therefore, appraises the F/T resistance of FRCA mixtures proportioned through various mix proportioning techniques (i.e., DRM, EV and PPMs), produced with distinct crushing processes (i.e., crusher’s fines vs. finely ground). The results show that the mix design technique has a significant influence on the FRCA mixture’s F/T resistance where PPM-proportioned mixtures demonstrate the best overall performance, exceeding the specified requirements while DRM-proportioned mixtures failed F/T resistance requirements. Moreover, the crushing process plays an important role in the recycled mixtures’ cracking behavior under F/T cycles, where less processing leads to fewer cracks while remaining the most sustainable option overall.

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Section: Direct Replacement Methods (Drm)mentioning

confidence: 99%

Section: Background 21 Multi-phase Nature Of Recycled Concrete Aggreg...mentioning

confidence: 99%

Freezing and Thawing Resistance of Fine Recycled Concrete Aggregate (FRCA) Mixtures Designed with Distinct Techniques

et al. 2022

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“…Less water migrated outward into the cured cement paste's capillary pores due to the porosity of the brick is low, which reduced the amount of water absorption. However, the amount of mortar that adheres to the RCA particles also affects how much water bricks absorb [17,18]. In conclusion, these samples absorbed less water than previous RCA30 samples with a cement-to-sand ratio of 1:5.…”

Section: Water Absorptionmentioning

confidence: 97%

Effect of Strength and Durability of Sand Cement Brick Containing Recycled Concrete Aggregate and Cold Bottom Ash

Khalid,

Zaki,

Ayob

et al. 2024

TOCIEJ

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Introduction The market price of brick has risen sharply due to the insufficient brick supply. Therefore, implementing RCA as one of the alternative materials for sand replacement is significant. The consumption of natural aggregate (NA) can be reduced by using the RCA. It is a good step to utilize recycled concrete to minimize the problem of excess waste materials. The results of using RCA and CBA as sand replacements contribute to better performance in compressive strength as compared to the normal brick. The density of the brick was also reduced by 4.95% as the RCA and CBA took place in the brick. Besides that, the water absorption was decreased when incorporating RCA and CBA in the cement brick due to less free water in the mix and fewer voids. Aims This study aims to ascertain the performance, strength, and durability characteristics of sand cement bricks incorporated with RCA and CBA as partial replacements for sand. Methods Percentages of 1.5%, 3.0%, 4.5%, and 6.0% of CBA and 15%, 30%, 45%, and 60% of RCA were chosen for partial sand replacement. The brick had dimensions of 215 mm in length, 65 mm in depth and 105 mm in width. Density, compressive force, and water absorption tests were undertaken after each of the three varied ratios of water to cement (1:5, 1:6, and 1:7). Results The finding indicates that with the optimum RCA and CBA replacement and the correct water to cement ratio, the performance of the new brick is better than the normal brick. Conclusion The optimum sand-to-cement ratio is 1:6, according to the overall results of selecting the optimal sand-to-cement ratio by density, compressive strength, and water absorption test. However, the result for the density value shows that the average brick density is inferior to the control brick. For all of the sample bricks, the compressive strength was best at a sand cement ratio of 1:6. However, as each of the samples complies with the British Standard criterion of less or equal to 15% absorption, it was determined that the sand cement brick's capacity for water absorption was sufficient.

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“…In the manufacture of asphalt mixtures, coarse aggregates and fine aggregates are required in large amount [1]. By the increasing infrastructure developments using aggregate in various regions, this will prompt damages to the ecosystem around the aggregate mining area [2] and [3]. To reduce the use of fresh aggregates directly from nature, recycled materials, including waste materials have opted for asphalt mixtures on road pavement.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Concrete Waste as the Substitute for Coarse Aggregates in Asphalt Mixtures

Harnaeni¹,

Hijra²,

Benina³

et al. 2022

cea

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This paper aims to determine the Marshall properties of Asphalt Concrete-Wearing Course (AC-WC) and Hot Rolled Sheet-Wearing Course (HRS-WC) with the utilization of concrete waste and also to determine the percentage of concrete waste added into AC-WC and HRS-WC as the substitute for coarse aggregates. During the manufacture of asphalt mixtures, coarse aggregates, and fine aggregates are required in large quantities. To reduce fresh aggregates in the manufacture of asphalt mixtures for road pavement, concrete waste has become an alternative. This study used 60/70 penetration asphalt, coarse aggregate, fine aggregate and concrete waste of 0%, 20%, and 40%. The test was conducted using Marshall test tool, which consisted of two stages of testing. The first stage, Marshall test, was performed to determine the optimum bitumen content of asphalt mixture with a concrete waste variation of 0%, 20%, and 40%. The second stage of Marshall test was conducted to determine the Marshall properties (stability, flow, Marshall Quotient, VMA, VFWA, and VIM) by performing in the asphalt mixture with concrete waste variations of 0%, 20%, and 40%. The results showed that as a performance indicator of asphalt mixtures that acted as the variation addition in concrete waste in AC-WC and HRS-WC asphalt mixtures, Marshall properties decreased in Stability values, Marshall Quotient and VFWA, whereas the values of Flow, VIM, and VMA experienced an increase. The utilization of concrete waste up to 20% as the substitute for coarse aggregate was acceptable for respective AC-WC and HRS-WC asphalt mixture. The maximum acceptable variation of concrete waste was 35% for AC-WC asphalt mixture and 29% for HRS-WC asphalt mixture.

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The Optimum Replacement of Fine Recycled Concrete Aggregate on the Compressive and Splitting Tensile Strength of the Concrete

Cited by 4 publications

References 25 publications

Freezing and Thawing Resistance of Fine Recycled Concrete Aggregate (FRCA) Mixtures Designed with Distinct Techniques

Freezing and Thawing Resistance of Fine Recycled Concrete Aggregate (FRCA) Mixtures Designed with Distinct Techniques

Effect of Strength and Durability of Sand Cement Brick Containing Recycled Concrete Aggregate and Cold Bottom Ash

Utilization of Concrete Waste as the Substitute for Coarse Aggregates in Asphalt Mixtures

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