Attribution of molasses dosage on fresh and hardened performance of recycled aggregate concrete

Rashid, Khuram; Tariq, Samia; Shaukat, Waseem

doi:10.1016/j.conbuildmat.2018.11.249

Cited by 20 publications

(6 citation statements)

References 17 publications

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“…A bi-surface shear strength ( B s ) test was conducted on the specimens of 150 mm × 150 mm × 150 mm dimensions, as shown in the schematic setup in Figure 5 . This testing technique was adopted from the literature [ 65 ]. B s is calculated using Equation (1).…”

Section: Experimental Programmentioning

confidence: 99%

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

et al. 2022

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The issue of brittleness and low post-peak load energy associated with the plain HSC led to the development of fiber-reinforced concrete (FRC) by using discrete fiber filaments in the plain matrix. Due to the high environmental impact of industrial fibers and plasticizers, FRC development is ecologically challenged. Sustainability issues demand the application of eco-friendly development of FRC. This study is aimed at the evaluation of coir as a fiber-reinforcement material in HSC, with the incorporation of silica fume as a partial replacement of cement. For this purpose, a total of 12 concrete mixes were produced by using three different doses of coir (0%, 1%, 1.5%, and 2% by wt. of binder) with silica fume (0%, 5%, and 10% as volumetric replacements of cement). The examined parameters include compressive strength, shear strength, splitting tensile strength, ultrasonic pulse velocity, water absorption, and chloride ion permeability. The scanning electron microscopy (SEM) technique was adopted to observe the microstructure of the CF-reinforced concrete. The results revealed that due to the CF addition, the compressive strength of HSC reduces notably; however, the splitting tensile strength and shear strength experienced notable improvements. At the combined incorporation of 1.5% CF with 5% silica fume, the splitting tensile strength and shear strength of the concrete experienced improvements of 47% and 70%, respectively, compared to that of the control mix. The CF incorporation is detrimental to the imperviousness of concrete. The combined incorporation of CF and silica fume is recommended to minimize the negative effects of CF on the permeability resistance of concrete. The SEM results revealed that CF underwent a minor shrinkage with the age.

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Section: Experimental Programmentioning

confidence: 99%

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

et al. 2022

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“…The pyrolysis of sucrose may lead to the creation of another product that contains high molecular weight particles as much as 13,200, thus acting as plasticizer/water-reduction agents. This reduction in water content in the cement matrix can significantly affect the structures of molasses at higher dosages [46]. It was shown that the presence of sugar in cane-derived molasses can delay the C 3 S initial hydration and expedite C 3 A hydration and, thus, the mixing water was not perfectly achieved.…”

Section: Ph Value Of Em-concretementioning

confidence: 99%

“…Another reason may be the existence of molasses that slowed down the hydration reaction at an early age. Yadav and Das [50] acknowledged that [46] the pH value of concrete between 10 to 13 has insignificant effect on the concrete properties. So, the results obtained in this study are in the safety limit of concrete usage in the construction sectors.…”

Section: Ph Value Of Em-concretementioning

confidence: 99%

Microstructure and Strength Properties of Sustainable Concrete Using Effective Microorganisms as a Self-Curing Agent

et al. 2022

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In practical applications, problems related to proper curing arise for inclined structural elements, especially in skyscrapers, wherein concrete is very thick. To overcome this problem, the implementation of self-curing technology using varieties of smart materials has become significant. Based on these factors, this study determined the impact of effective microorganisms (EMs) as a new self-curing agent on the microstructures and strength properties of sustainable concrete. Five concrete mixtures were prepared with various EM content (5, 10, 15, 20, and 25%) as water replacement under air-curing condition. The workability of the concretes was found to increase with the increase in EM contents from 0 to 25%. In addition, concrete designed with 10% of EM achieved the highest compressive strength (42 MPa) after 28 days of aging as opposed to the control specimen (35 MPa). The microstructures of the concrete made with 10% of EM revealed very a compact network, fewer voids, and formulation of dense C-S-H gel. Based on the results, the proposed EM may be implemented as a self-curing agent to achieve high-performance sustainable concretes beneficial for the construction sectors.

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“…Retarder secara umum berbasis material yang mengandung gula, dengan mekanismenya prosesnya yaitu melapisi low castable cement dengan gugus OHsehingga memperlambat reaksi. Produk sampingan dari gula terbukti sebagai campuran untuk semen Portland yang secara efektif menghambat hidrasi semen dan juga meningkatkan kemampuan kerja dan harganya yang sangat rendah (H. Li et al, 2015); (A. Jumadurdiyev et al, 2005); (K. Rashid et al, 2019); (L. Weifeng et al, 2014). Konsentrasi ion Ca akan berkurang dan diiringi juga dengan melambatnya kristalisasi selama fase hidrasi jika terjadi pembentukan garam Ca dalam air (A. Desmi, 2017) .…”

Section: Gambar 1 Perbandingan 3 Jenis Low Castable Cementunclassified

Efek konsentrasi citric acid dan sukrosa sebagai retarder terhadap pola alir dan sifat mekanis pada low cement castable hasil refraktori

Kutsiyah,

Novitasari,

Wardani

et al. 2021

jtk

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Penelitian ini memiliki tujuan untuk menganalisa pengaruh perbandingan konsentrasi antara retarder dan penambahan H2O terhadap sifat mengalir, waktu mengeras dan kekerasan pada low semen castable produk refraktori. Menunjukkan jenis retarder citric acid dan sukrosa memiliki hasil karakterisasi yang baik terhadap kemampuan aliran dan pengaturan waktu sementara penambahan H2O menyimpulkan untuk kekuatan yang baik dengan berbagai jenis suhu pada 110ºC, 900ºC dan 1500ºC yang mengungkapkan pengukuran di atas untuk spesifikasi yang diizinkan dan juga tes kekuatan yang berasal dari retarder citric acid dan sukrosa dalam berbagai konsentrasi 0,01% sampai 0,04% dan dengan berbagai pencampuran H2O 6,0 hingga 6,5% mencapai kekuatan di atas

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Attribution of molasses dosage on fresh and hardened performance of recycled aggregate concrete

Cited by 20 publications

References 17 publications

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

Microstructure and Strength Properties of Sustainable Concrete Using Effective Microorganisms as a Self-Curing Agent

Efek konsentrasi citric acid dan sukrosa sebagai retarder terhadap pola alir dan sifat mekanis pada low cement castable hasil refraktori

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