High-strength lightweight concrete made with scoria aggregate containing mineral admixtures

Kılıç, Alaettin; Atiş, Cengiz Duran; Yaşar, Ergül; Özcan, Fatih

doi:10.1016/s0008-8846(03)00131-5

Cited by 152 publications

(25 citation statements)

References 6 publications

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“…Previous studies reported that the substitution of OPC with mineral admixture in structural LWC reduced the density of concrete (Kılıç et al, 2003;Shafigh et al, 2013), which may be attributed to the lower specific gravity of the supplementary cementitious material compared to OPC (Akçaözoğlu and Atiş, 2011;Mo et al, 2014b). In this study, RHA has a lower specific gravity (2.30) than OPC (3.10), and, hence, the replacement of 15% of OPC had a direct influence on the density reduction.…”

Section: Densitymentioning

confidence: 50%

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Foong

Alengaram

Jumaat

et al. 2015

J. Zhejiang Univ. Sci. A

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Abstract:This study explores the use of rice husk ash (RHA) and manufactured sand (M-sand) as replacements for cement and fine aggregate, respectively, in lightweight oil palm shell concrete (OPSC). In the first stage of this study, the effect of various cement replacement levels, with RHA (5%, 10%, 15%, and 20%) and 100% sand replacement with M-sand and quarry dust (QD), on the compressive strength of OPSC was investigated. The results showed that the highest compressive strength of OPSC of about 51.49 MPa was achieved with the use of 15% RHA and M-sand. In the second stage of the work, the variables of RHA (0 and 15%) and M-sand (0, 50%, and 100%) were used to investigate their combined effects on the mechanical properties of OPSC. It was found that the combination of 15% RHA and 100% M-sand gave the best performance of OPSC in terms of mechanical properties, such as compressive, splitting tensile, flexural strength, and Young's modulus.

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Section: Densitymentioning

confidence: 50%

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Foong

Alengaram

Jumaat

et al. 2015

J. Zhejiang Univ. Sci. A

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“…70% of the concrete is composed of aggregates (fine and coarse aggregates). Selection of such aggregates has been investigated by a number of researchers for the very long time and stated the approximate compostion of materials for structural lightweight concrete [1,2]. ere are so many lightweight aggregates available in the market; one has to choose which is less porous, less dense, and economical and performs better.…”

Section: Introductionmentioning

confidence: 99%

“…Alaettin Kilic and Cengiz Duran Atis in 2002 [1] had reported that structural lightweight concrete with basic pumice used as lightweight aggregate with and without admixtures gives compressive strength up to 43 MPa and tensile strength up to 8.9 MPa by the use of silica fumes up to 10% by weight of cement. e lightweight scoria aggregates can be utilized to reduce the earthquake acceleration by producing structural lightweight aggregates.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Lightweight Concrete Structures

Nadh

Krishnamurthy

2018

Advances in Civil Engineering

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Concrete structures are prone to earthquake due to mass of the structures. e primary use of structural lightweight concrete (SLWC) is to reduce the dead load of a concrete structure, which allows the structural designer to reduce the size of the structural members like beam, column, and footings which results in reduction of earthquake forces on the structure. is paper attempts to predict the seismic response of a six-storied reinforced concrete frame with the use of lightweight concrete. A well-designed sixstorey example is taken for study. e structure is modelled with standard software, and analysis is carried out with normal weight and lightweight concrete. Bending moments and shear forces are considered for both NWC and LWC, and it is observed that bending moments and shear forces are reduced to 15 and 20 percent, respectively, in LWC. e density difference observed was 28% lower when compared NWC to LWC. Assuming that the section and reinforcements are not revised due to use of LWC, one can expect large margin over and above MCE (maximum considered earthquake; IS 1893-2016), which is a desirable seismic resistance feature in important structures.

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“…Lightweight aggregates have been classified as natural and artificial. Lightweight concrete can be made with higher strength, better tensile strength, and lower thermal expansion by using lightweight aggregate [2][3][4]. e fire resistance of concrete is complicated.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Strength Properties of Carbon Fiber-Reinforced Lightweight Concrete Exposed to the High Temperature Using Artificial Neural Network and Support Vector Machine

Tanyıldızı

2018

Advances in Civil Engineering

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e artificial neural network and support vector machine were used to estimate the compressive strength and flexural strength of carbon fiber-reinforced lightweight concrete with the silica fume exposed to the high temperature. Cement was replaced with three percentages of silica fumes (0%, 10%, and 20%). e carbon fibers were used in four different proportions (0, 2, 4, and 8 kg/m 3 ). e specimens of each concrete mixture were heated at 20°C, 400°C, 600°C, and 800°C. After this process, the specimens were subjected to the strength tests. e amount of cement, the amount of silica fumes, the amount of carbon fiber, the amount of aggregates, and temperature were selected as the input variables for the prediction models. e compressive and flexural strengths of the lightweight concrete were determined as the output variables. e model results were compared with the experimental results. e best results were achieved from the artificial neural network model. e accuracy of the artificial neural network model was found at 99.02% and 96.80%.

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High-strength lightweight concrete made with scoria aggregate containing mineral admixtures

Cited by 152 publications

References 6 publications

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand

Seismic Performance of Lightweight Concrete Structures

Prediction of the Strength Properties of Carbon Fiber-Reinforced Lightweight Concrete Exposed to the High Temperature Using Artificial Neural Network and Support Vector Machine

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