Effect of Coral Aggregates of Blended Cement Concrete Subjected to Different Water Immersion Condition

Bunyamin, Bunyamin; Kurniasari, Febrina Dian; Munirwan, Reza Pahlevi; Jaya, Ramadhansyah Putra

doi:10.1155/2022/2919167

Cited by 11 publications

(4 citation statements)

References 43 publications

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“…the bulk density of concrete produced for a design compressive strength of 17.0 MPa is 2,380 kg/m 3 [61]. In addition, the obtained bulk density of concrete value is close to the average bulk density of concrete value, which is 2,400 kg/m 3 [62].…”

Section: Advances In Civil Engineeringsupporting

confidence: 64%

Cymbopogon nardus Leaf Ash as an Alternative Material for Enhancing Concrete Strength

Bunyamin,

Hady,

Munirwan

et al. 2024

Advances in Civil Engineering

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Numerous waste materials containing calcium and silica have been adopted as partial cement substitutes. This practice is intended to reduce the environmental impact of cement production, specifically in terms of carbon dioxide (CO2) emissions. However, plantation waste, specifically waste from Cymbopogon nardus leaf, has not been completely exploited. The presence of silica in C. nardus leaf ash (CNLA) presents an opportunity to partially replace cement in concrete. The purpose of this study is to determine the effect of substituting CNLA at 0%, 5%, 10%, and 15% as a partial replacement for cement on the compressive and tensile strengths of concrete after 28 days of curing. For testing purposes, 15 cm × 30 cm cylindrical concrete specimens were formed. The investigation was conducted following ACI 211.1-91 (American Concrete Institute) and ASTM (American Society for Testing and Materials) standards. The required compressive strength for the concrete was 17.00 MPa. The results of the study indicate that the addition of CNLA to cement at concentrations of 0%, 5%, 10%, and 15% resulted in compressive strengths of 21.56, 21.12, 22.58, and 17.88 MPa, respectively. The results of the split tensile strength test were 2.43, 2.72, 2.87, and 3.18 MPa, respectively. According to the findings of this study, increasing the amount of CNLA in cement by 10% can increase the compressive and tensile strengths of concrete. In addition, as the percentage of CNLA exceeds 10%, the workability of the concrete decreases, posing challenges in attaining the targeted strength of the concrete.

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Section: Advances In Civil Engineeringsupporting

confidence: 64%

Cymbopogon nardus Leaf Ash as an Alternative Material for Enhancing Concrete Strength

Bunyamin,

Hady,

Munirwan

et al. 2024

Advances in Civil Engineering

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“…Pengolahan Limbah cangkang tiram bermula dari: dikumpulkan, kemudian dibawa ke Laboratorium untuk dibersihkan yaitu direndam dalam baskom berisi air selama 24 jam. Air rendaman dalam baskom tersebut menggunakan air PDAM [21]. Selanjutnya, dikeringkan dengan menggunakan oven selama 24 jam pada suhu 105 0 C. Setelah limbah cangkang tersebut kering, maka dibakar dengan suhu 500 0 C dengan menggunakan drum pembakaran [22].…”

Section: Pengolahan Limbah Cangkang Tiram Dan Serat Rovingunclassified

Analisis Kuat Tekan Beton Menggunakan Bahan Substitusi Serat Roving dan Cangkang Tiram

Bunyamin,

Hady,

Hendrifa

et al. 2023

JSE

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Para peneliti telah melakukan percobaan terhadap bahan-bahan lain yang sifatnya sama seperti semen, seperti limbah cangkang tiram. Hasil penelitian terdahulu menunjukkan bahwa penggantian semen 10% dan FAS (Faktor Air Semen) 0,50 mampu meningkatkan kuat tekan beton. Pada penelitian ini, akan ditambahkan material lain ke dalam semen tersebut yaitu serat roving (serat gypsum), bertujuan mengurangi retak yang terjadi. Tujuan penelitian ini adalah untuk memanfaatkan limbah cangkang tiram sebesar 10% dan penambahan serat roving sebesar 5%, 10%, dan 15% ke dalam semen terhadap kuat tekan beton. Benda uji berupa silinder (15 cm x 30 cm) berjumlah 20 unit. Limbah cangkang tiram berasal dari Krueng Neng, Aceh Besar. Serat roving didapatkan dari toko bahan bangunan di Banda Aceh. Penelitian ini dilaksanakan berdasarkan metode ACI 211.1-91 (American Concrete Institute) dan ASTM (American Society for Testing and Material). Hasil penelitian menunjukkan bahwa kuat tekan beton normal sebesar 22,05 MPa. Sedangkan kuat tekan beton dengan substitusi serat roving dan cangkang tiram adalah 25,16 MPa, 30,59 MPa, dan 30,70 MPa. Kuat tekan beton yang dikombinasikan meningkat dibandingkan dengan kuat tekan beton normal.

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“…The over-exploitation of river sand can result in substantial price hikes, a reduction in sand reserves, and have a significant environmental impact [ 25 ]. Moreover, fine-grained river sand and freshwater pose potential challenges in certain construction projects, particularly in instances such as island projects situated far from the mainland [ 26 , 27 ]. The logistical constraints of transporting materials from abroad may lead to uncertainties in project schedules.…”

Section: Introductionmentioning

confidence: 99%

Effect of PVA Fiber on the Mechanical Properties of Seawater Coral Sand Engineered Cementitious Composites

Han,

Gao,

et al. 2024

Materials

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The physical and mechanical characteristics of seawater coral sand engineered cementitious composites (SCECC) were examined through uniaxial compression, three-point bending, and splitting tensile tests. The mechanical properties were scrutinized under varying fiber volume fraction conditions (V = 0%, 0.575%, 1.150%, 1.725%, and 2.300%). The experimental results indicated that the compressive strength, three-point bending strength, and split tensile strength of SCECC tended to increase with the rise in fiber volume fraction. The strengths attained their maximum values of 45.88, 12.56, and 3.03 MPa when the fiber volume fraction reached 2.300%. In the compression test, the compressive strength of the 7-day specimen can achieve more than 78.50% of that observed in the 28-day specimen. Three-point bending test has revealed that SCECC exhibits favorable strain-hardening and multi-crack cracking characteristics. Fracture patterns of SCECC exhibited variations corresponding to changes in fiber content, as illustrated by their load–deformation curves, the addition of PVA fibers can change the damage mode of cementitious composites from brittle to ductile. The fracture energy of SCECC further attests to its elevated toughness. This is due to the fact that the fibers delay the formation of microcracks and prevent crack expansion, thus significantly increasing the deformability of the material. By verifying its strength, deformability, fracture energy, and other key performance indicators, the feasibility of SCECC in coastal construction projects has been clarified. The successful development of SCECC provides an innovative and high-performance option for the construction of future island projects.

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Effect of Coral Aggregates of Blended Cement Concrete Subjected to Different Water Immersion Condition

Cited by 11 publications

References 43 publications

Cymbopogon nardus Leaf Ash as an Alternative Material for Enhancing Concrete Strength

Cymbopogon nardus Leaf Ash as an Alternative Material for Enhancing Concrete Strength

Analisis Kuat Tekan Beton Menggunakan Bahan Substitusi Serat Roving dan Cangkang Tiram

Effect of PVA Fiber on the Mechanical Properties of Seawater Coral Sand Engineered Cementitious Composites

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