Development of self-consolidating rubberized concrete incorporating silica fume

AbdelAleem, Basem H.; Hassan, Assem A. A.

doi:10.1016/j.conbuildmat.2017.11.146

Cited by 84 publications

(31 citation statements)

References 26 publications

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“…Figure demonstrates a fluctuation in both slump test and J‐ring experiment and the 0.75% steel fiber ratio specimen (M7) reached the peak, which is regarded as unexpected fluctuation due to the inconsistency of cement . The time ( T 500 ) for both FR‐RASCC also demonstrated an increasing tendency when the fiber fraction increased, which was according to the past studies . In conclusion, the fibers tend to negatively affect the fresh properties of SCC compared with Mc (780 mm slump and 650 mm J‐ring slump) and steel fibers show a higher impact in fresh properties than that of PP fibers.…”

Section: Resultssupporting

confidence: 69%

Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Aslani

Hou

Nejadi

et al. 2019

Structural Concrete

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Self-compacting concrete (SCC) is a cementitious composite which serves complex formworks without mechanical vibrations with superior deformability and high resistance to segregation. Besides, the recycled aggregate concrete (RAC) is also developing rapidly and along with the ever-increasing sustainable demand for infrastructure. The combination of the fibers, RAC, and SCC may create advantages for the construction industry. In this study, the polypropylene (PP) fiber at 0.1, 0.15, 0.2, and 0.25% volume fractions and steel fibers at 0.25, 0.5, 0.75, and 1% volume fractions are introduced into fiber-reinforced recycled aggregate selfcompacting concrete (FR-RASCC). Both fresh property and hardened mechanical performance, comprising compressive and tensile strengths and modulus of elasticity are analyzed. The fibers validate the optimal 0.1% volume fraction for PP fiber and 0.75% volume fraction for steel fiber. In addition, the results are proved to enhance the mechanical properties and reduce cracking despite the negative impact on the fresh property. Moreover, the experimental outcomes are compared with previous researches to establish the linear model, demonstrating the relationship between fiber fraction and the mechanical properties. K E Y W O R D Sfiber-reinforced recycled aggregate self-compacting concrete, polypropylene fibers, recycled aggregate concrete, self-compacting concrete, steel fibers

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Section: Resultssupporting

confidence: 69%

Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Aslani

Hou

Nejadi

et al. 2019

Structural Concrete

View full text Add to dashboard Cite

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“…Similarly, with a higher replacement level of cement with silica fume, values of the slump flow diameter take the value of flowability class SF1 and SF2. However, it can be concluded that the results of slump flow diameter are satisfied and in accordance with EFNARC guidelines, except for those of concrete mixtures SCC-30CR-5SLF and SCC-30CR-10SLF, where the values of slump flow diameter were below 550 mm, which was most likely because of the crumb rubber rough surface, surface friction, and sharp edges of the rubber particles [2,5] causing blockages.…”

Section: Flowabilitymentioning

confidence: 77%

“…The test results of the SCC fresh state properties were in accordance with investigations carried out by different authors so far [8,44,60,61], where fine aggregate (0-4 mm) was replaced with crumb rubber. This behavior can be explained by the sharp edges [2,5] of rubber particles causing blockages; hence, more energy is required to move concrete paste and an enhancement in viscosity and reduction in flowability and passing ability occurs. However, with up to 15% of the fine aggregate replacement level and 5% of the cement replacement level, favorable fresh SCC properties classes can be obtained.…”

Section: Segregation Resistancementioning

confidence: 99%

“…As expected, the mean value of three measurements of 28-day compressive strength was the lowest, i.e., 12.21 MPa, when the CR and SLF replacement levels were 30% and 0%, respectively. The negative impact of CR on the 28-day compressive strength can be described with a poor rubber granule-cement paste bond and with a low rubber modulus of elasticity compared to natural aggregates [5,62]. On the contrary, the mean value of three measurements of 28-day compressive strength was the greatest when the replacement level of cement with silica fume was 10%, with 0% of crumb rubber content, i.e., 66.30 MPa (Table 7, Figure 12).…”

Section: Compressive Strength (Fck Cyl)mentioning

confidence: 99%

“…After almost two decades, the idea to combine concrete with waste recycled tire rubber as an aggregate replacement is still the subject of a large number of experimental investigations. To date, a considerable number of authors investigated traditional concrete with recycled rubber derived from end-of-life tires (ELTs), and it is known that this type of environmentally friendly concrete has been used in non-structural concrete elements such as traffic noise barriers, sidewalks, and sport fields [1][2][3][4] mainly because the implementation of the waste tire rubber in concrete reduces the value of the compressive strength and modulus of elasticity of concrete [5][6][7][8][9][10][11][12][13]. On the other hand, a smaller number of authors investigated the self-compacting rubberized concrete (SCRC) in terms of concrete used for structural elements [8,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

et al. 2020

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The paper aims to investigate the influence of waste tire rubber and silica fume on the fresh and hardened properties of self-compacting concrete (SCC) and to design multivariate regression models for the prediction of the mechanical properties of self-compacting rubberized concrete (SCRC). For this purpose, 21 concrete mixtures were designed. Crumb rubber derived from end-of-life tires (grain size 0.5–3.5 mm) was replaced fine aggregate by 0%, 5%, 10%, 15%, 20%, 25%, and 30% of total aggregate volume. Silica fume was replaced cement by 0%, 5%, and 10% of the total cement mass. The optimal replacement level of both materials was investigated in relation to the values of the fresh properties and mechanical properties of self-compacting concrete. Tests on fresh and hardened self-compacting concrete were performed according to the relevant European standards. Furthermore, models for predicting the values of the compressive strength, modulus of elasticity, and flexural strength of SCRC were designed and verified with the experimental results of 12 other studies. According to the obtained results, mixtures with up to 15% of recycled rubber and 5% of silica fume, with 28 days compressive strength above 30 MPa, were found to be optimal mixtures for the potential future investigation of reinforced self-compacting rubberized concrete structural elements.

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Controlling the mechanoadaptive properties of hydrogenated nitrile rubber by the incorporation of cementious based industrial waste for downhole application

et al. 2020

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This work aims to develop smart stimuli responsive composites utilizing hydrogenated nitrile rubber (HNBR), fly ash (FA), and slag (SG) with white cement (WC). HNBR has been chosen by capitalizing its unique attributes of high temperature performance and high oil resistance as the matrix and coining the synergistic setting characteristics of FA and SG as industrial wastes with WC. The composites displayed synergism in mechanical and thermal properties. The calcium-rich phases of FA and SG, entice the postpolymerization modification of the rubber matrix in conjunction with cement serving as reactive fillers. The changes of modulus (50 MPa), mass (7%), volume (8%), and hardness were observed upon repeated wet-dry cycles. These are attributed to the ionic interactions between the modified polymer matrix and cementitious phases as a result of postpolymerization conversion. These smart composite materials could be used for sealing and microfluidic valves for the downhole applications in oil field industries.

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Development of self-consolidating rubberized concrete incorporating silica fume

Cited by 84 publications

References 26 publications

Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

Controlling the mechanoadaptive properties of hydrogenated nitrile rubber by the incorporation of cementious based industrial waste for downhole application

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