The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Semiha Akcaozoglu - One of the best experts on this subject based on the ideXlab platform.
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recycling of waste pet granules as aggregate in alkali activated blast furnace slag metakaolin blends
Construction and Building Materials, 2014Co-Authors: Semiha Akcaozoglu, Cuneyt UluAbstract:Abstract In this study the utilization of waste PET aggregate in alkali-activated slag and slag/metakaolin blended mortar was investigated. Sodium hydroxide (NaOH) pellets and liquid sodium silicate were used as activators. Eighteen different mortar mixtures were prepared for the laboratory tests. In the reference mixture, unground slag (max size of 4 mm) was used as aggregate. In PET aggregate mixtures, slag aggregate was replaced with waste PET aggregate, in amount of 20%, 40%, 60%, 80% and 100% by volume. The water-binder (w/b) ratio and aggregate-binder ratio used in the mixtures were 0.50 and 2.75, respectively. The unit weight, compressive strength, flexural tensile strength, ultrasonic wave velocity and water absorption and porosity ratios of the mixtures were measured. The test results showed that, using PET aggregate contributed to decrease of unit weight of alkali-activated mortars due to the low density of PET aggregate. Although the strength values of the specimens decreased depending on increasing waste PET aggregate amount, the compressive strength values of the alkali-activated slag mortars containing waste PET aggregate were satisfactory. In addition, alkali-activated slag mixtures containing 60% and 80% waste PET aggregate were drop into structural lightweight Concrete Category in terms of unit weight and strength properties. However, the compressive strengths of alkali-activated slag/metakaolin blended mixtures were lower than alkali-activated slag mixtures at the same cure condition. It is concluded from the test results that there is a potential for the use of waste PET as aggregate in the production of alkali-activated slag mortar. Because of using waste materials as binder and aggregate for mortar production in this study, alkali-activated slag mortar with PET aggregate is thought to be a good alternative for recycling of waste materials.
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an investigation on the use of shredded waste pet bottles as aggregate in lightweight Concrete
Waste Management, 2010Co-Authors: Semiha Akcaozoglu, Cengiz Duran Atis, Kubilay AkcaozogluAbstract:In this work, the utilization of shredded waste Poly-ethylene Terephthalate (PET) bottle granules as a lightweight aggregate in mortar was investigated. Investigation was carried out on two groups of mortar samples, one made with only PET aggregates and, second made with PET and sand aggregates together. Additionally, blast-furnace slag was also used as the replacement of cement on mass basis at the replacement ratio of 50% to reduce the amount of cement used and provide savings. The water–binder (w/b) ratio and PET–binder (PET/b) ratio used in the mixtures were 0.45 and 0.50, respectively. The size of shredded PET granules used in the preparation of mortar mixtures were between 0 and 4 mm. The results of the laboratory study and testing carried out showed that mortar containing only PET aggregate, mortar containing PET and sand aggregate, and mortars modified with slag as cement replacement can be drop into structural lightweight Concrete Category in terms of unit weight and strength properties. Therefore, it was concluded that there is a potential for the use of shredded waste PET granules as aggregate in the production of structural lightweight Concrete. The use of shredded waste PET granules due to its low unit weight reduces the unit weight of Concrete which results in a reduction in the death weight of a structural Concrete member of a building. Reduction in the death weight of a building will help to reduce the seismic risk of the building since the earthquake forces linearly dependant on the dead-weight. Furthermore, it was also concluded that the use of industrial wastes such as PET granules and blast-furnace slag in Concrete provides some advantages, i.e., reduction in the use of natural resources, disposal of wastes, prevention of environmental pollution, and energy saving.
Kubilay Akcaozoglu - One of the best experts on this subject based on the ideXlab platform.
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an investigation on the use of shredded waste pet bottles as aggregate in lightweight Concrete
Waste Management, 2010Co-Authors: Semiha Akcaozoglu, Cengiz Duran Atis, Kubilay AkcaozogluAbstract:In this work, the utilization of shredded waste Poly-ethylene Terephthalate (PET) bottle granules as a lightweight aggregate in mortar was investigated. Investigation was carried out on two groups of mortar samples, one made with only PET aggregates and, second made with PET and sand aggregates together. Additionally, blast-furnace slag was also used as the replacement of cement on mass basis at the replacement ratio of 50% to reduce the amount of cement used and provide savings. The water–binder (w/b) ratio and PET–binder (PET/b) ratio used in the mixtures were 0.45 and 0.50, respectively. The size of shredded PET granules used in the preparation of mortar mixtures were between 0 and 4 mm. The results of the laboratory study and testing carried out showed that mortar containing only PET aggregate, mortar containing PET and sand aggregate, and mortars modified with slag as cement replacement can be drop into structural lightweight Concrete Category in terms of unit weight and strength properties. Therefore, it was concluded that there is a potential for the use of shredded waste PET granules as aggregate in the production of structural lightweight Concrete. The use of shredded waste PET granules due to its low unit weight reduces the unit weight of Concrete which results in a reduction in the death weight of a structural Concrete member of a building. Reduction in the death weight of a building will help to reduce the seismic risk of the building since the earthquake forces linearly dependant on the dead-weight. Furthermore, it was also concluded that the use of industrial wastes such as PET granules and blast-furnace slag in Concrete provides some advantages, i.e., reduction in the use of natural resources, disposal of wastes, prevention of environmental pollution, and energy saving.
Eravan Serri - One of the best experts on this subject based on the ideXlab platform.
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DURABILITY PERFORMANCE OF OIL PALM SHELL LIGHTWEIGHT Concrete FOR INSULATION BUILDING MATERIAL
Jurnal Teknologi, 2016Co-Authors: Eravan Serri, Mohd Zailan Suleiman, Roslan Talib, Mahyuddin RamliAbstract:The advantage of oil palm shell (OPS) as coarse aggregate in Concrete can be extended to insulation Concrete capacity. Thus, this paper will explain the durability of oil palm shell lightweight Concrete (OPSLC) for insulation Concrete capacity in building. Nine mix designs were developed containing high volume of OPS, which is 30, 32 and 34% from total volume of Concrete with three different OPS shapes (raw, crushed and partly crushed). The water absorption and drying shrinkage were examined; besides, thermal conductivity testing that was conducted for confirmation as insulation Concrete Category. The observation of all the specimens lasted one year for durability performance test and 28 days for thermal conductivity value. The highest water absorption value is 43% from previous study that was designed for structural Concrete. Higher OPS volume fraction produced higher air void content and caused water loss and increase of the hydration effects on OPSLC shrinkage. It also affected the microstructure conditions, especially specimens that used 34% of OPS volume fraction which show weak interface bond in cement matrix.
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Durability Performance of Oil Palm Shell Lightweight Concrete as Insulation Concrete
Applied Mechanics and Materials, 2015Co-Authors: Eravan Serri, Mohd Zailan Sulieman, Azree Othuman MydinAbstract:This paper presents a solid agricultural solid waste, namely oil palm shell (OPS) as coarse aggregate to produce insulation Concrete. This study will investigate the porosity, air permeability and thermal conductivity of OPS lightweight Concrete (OPSLC). Nine mix designs were developed which comprised three OPS shapes and three volume fractions of OPS. The results indicated that increased volume fraction of OPS caused decreased durability performance and thermal conductivity. The shape of OPS is found to have significant effects to the porosity content and air permeability values. Thus, there is a strong relationship between porosity content and air permeability for all specimens. Based on the results, all specimens are found to be in the range of insulation Concrete Category except for specimen C-30, which has more than 0.75W/mK thermal conductivity according to RILEM requirement. The thermal conductivity of OPSLC is comparable with artificial lightweight aggregate.
Mahyuddin Ramli - One of the best experts on this subject based on the ideXlab platform.
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DURABILITY PERFORMANCE OF OIL PALM SHELL LIGHTWEIGHT Concrete FOR INSULATION BUILDING MATERIAL
Jurnal Teknologi, 2016Co-Authors: Eravan Serri, Mohd Zailan Suleiman, Roslan Talib, Mahyuddin RamliAbstract:The advantage of oil palm shell (OPS) as coarse aggregate in Concrete can be extended to insulation Concrete capacity. Thus, this paper will explain the durability of oil palm shell lightweight Concrete (OPSLC) for insulation Concrete capacity in building. Nine mix designs were developed containing high volume of OPS, which is 30, 32 and 34% from total volume of Concrete with three different OPS shapes (raw, crushed and partly crushed). The water absorption and drying shrinkage were examined; besides, thermal conductivity testing that was conducted for confirmation as insulation Concrete Category. The observation of all the specimens lasted one year for durability performance test and 28 days for thermal conductivity value. The highest water absorption value is 43% from previous study that was designed for structural Concrete. Higher OPS volume fraction produced higher air void content and caused water loss and increase of the hydration effects on OPSLC shrinkage. It also affected the microstructure conditions, especially specimens that used 34% of OPS volume fraction which show weak interface bond in cement matrix.
Azree Othuman Mydin - One of the best experts on this subject based on the ideXlab platform.
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Durability Performance of Oil Palm Shell Lightweight Concrete as Insulation Concrete
Applied Mechanics and Materials, 2015Co-Authors: Eravan Serri, Mohd Zailan Sulieman, Azree Othuman MydinAbstract:This paper presents a solid agricultural solid waste, namely oil palm shell (OPS) as coarse aggregate to produce insulation Concrete. This study will investigate the porosity, air permeability and thermal conductivity of OPS lightweight Concrete (OPSLC). Nine mix designs were developed which comprised three OPS shapes and three volume fractions of OPS. The results indicated that increased volume fraction of OPS caused decreased durability performance and thermal conductivity. The shape of OPS is found to have significant effects to the porosity content and air permeability values. Thus, there is a strong relationship between porosity content and air permeability for all specimens. Based on the results, all specimens are found to be in the range of insulation Concrete Category except for specimen C-30, which has more than 0.75W/mK thermal conductivity according to RILEM requirement. The thermal conductivity of OPSLC is comparable with artificial lightweight aggregate.