okan karahan - Academia.edu (original) (raw)
Papers by okan karahan
... Fatih ALTUN*, H. Bekir KARA, Erdal UNCUOĞLU, Okan KARAHAN Erciyes Üniversitesi, Mühendislik F... more ... Fatih ALTUN*, H. Bekir KARA, Erdal UNCUOĞLU, Okan KARAHAN Erciyes Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü ... Deprem yükleri etkisi altında betonarme karkas yapıların taşıyıcı elemanlarında çeşitli şekillerde yapısal hasarlar meydana gelmektedir. ...
Materials & Design, 2011
This paper reports of a comprehensive study on the durability properties of concrete containing p... more This paper reports of a comprehensive study on the durability properties of concrete containing polypropylene fiber and fly ash. Properties studied include unit weight and workability of fresh concrete, and compressive strength, modulus of elasticity, porosity, water absorption, sorptivity coefficient, drying shrinkage and freeze-thaw resistance of hardened concrete. Fly ash content used in concrete mixture was 0%, 15% and 30% in mass basis, and fiber volume fraction was 0%, 0.05%, 0.10% and 0.20% in volume basis.
Journal of Zhejiang University Science, 2008
In this study, an artificial neural network (ANN) model for studying the strength properties of s... more In this study, an artificial neural network (ANN) model for studying the strength properties of steel fiber reinforced concrete (SFRC) containing fly ash was devised. The mixtures were prepared with 0 wt%, 15 wt%, and 30 wt% of fly ash, at 0 vol.%, 0.5 vol.%, 1.0 vol.% and 1.5 vol.% of fiber, respectively. After being cured under the standard conditions for 7, 28, 90 and 365 d, the specimens of each mixture were tested to determine the corresponding compressive and flexural strengths. The parameters such as the amounts of cement, fly ash replacement, sand, gravel, steel fiber, and the age of samples were selected as input variables, while the compressive and flexural strengths of the concrete were chosen as the output variables. The back propagation learning algorithm with three different variants, namely the Levenberg-Marquardt (LM), scaled conjugate gradient (SCG) and Fletcher-Powell conjugate gradient (CGF) algorithms were used in the network so that the best approach can be found. The results obtained from the model and the experiments were compared, and it was found that the suitable algorithm is the LM algorithm. Furthermore, the analysis of variance (ANOVA) method was used to determine how importantly the experimental parameters affect the strength of these mixtures.
Puzolan olarak, tras, öğütülmüş şist gibi doğal puzolanların yanı sıra, yüksek fırın cürufu, uçuc... more Puzolan olarak, tras, öğütülmüş şist gibi doğal puzolanların yanı sıra, yüksek fırın cürufu, uçucu kül, silika füme gibi endüstriyel puzolanların hepsini kabul etmesinden dolayı, Kayseri civarındaki iki çimento fabrikasında ve ülkenin diğer birçok çimento fabrikasında TS-12143'te tanımlanan "Portland Kompoze Çimento" nun PKÇ/B-32.5R türü üretilmektedir. Öğütülmüş klinker puzolan katkısız halde iken dayanım bazına göre bir üst sınıf olan PÇ-42.5 oluşturmaktadır. Dolayısıyla, Kayseri yöresi çimento fabrikalarında PÇ-42.5 ve PKÇ/B-32.5R türü çimentolar piyasaya sunulmakta, PÇ-32.5 bulunmamaktadır. Bu deneysel çalışmada, PÇ-42.5 ve PKÇ/B-32.5R ile aynı çimento dozajı ve reçete ile üretilen betonların, 2-günlük, 7-günlük, 28-günlük, 180-günlük ve 360-günlük dayanımları karşılaştırılmıştır.
Construction and Building Materials, 2009
... examined previously is the effect of steel fiber additions on the mechanical and durability p... more ... examined previously is the effect of steel fiber additions on the mechanical and durability properties of fly ... of fresh mix properties of fiber reinforced fly ash concrete was conducted based on TS ... VB time is more sensitive not only towards steel fiber addition but also fly ash addition. ...
Construction and Building Materials, 2009
... Duran Atiş a , Corresponding Author Contact Information , E-mail The Corresponding Author , C... more ... Duran Atiş a , Corresponding Author Contact Information , E-mail The Corresponding Author , Cahit Bilim b , Özlem Çelik c and ... Cem Concr Res 2003;33(12): 20316]. The aim of this study was to investigate the feasibility of ... Oxide, SiO 2, Al 2 O 3, Fe 2 O 3, CaO, MgO, SO 3, K 2 O, ...
Advances in Engineering Software, 2009
In this study, an artificial neural network (ANN) and fuzzy logic (FL) study were developed to pr... more In this study, an artificial neural network (ANN) and fuzzy logic (FL) study were developed to predict the compressive strength of silica fume concrete. A data set of a laboratory work, in which a total of 48 concretes were produced, was utilized in the ANNs and FL study. The ...
Cement & Concrete Composites, 2006
Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind ... more Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind is extremely important from the aspects of (1) groundwater contamination and (2) durability of the pipes. In this study, water-tightness tests were applied on plain concrete, ...
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
Cement & Concrete Composites, 2006
Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind ... more Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind is extremely important from the aspects of (1) groundwater contamination and (2) durability of the pipes. In this study, water-tightness tests were applied on plain concrete, ...
Advances in Engineering Software, 2009
In this study, an artificial neural networks study was carried out to predict the compressive str... more In this study, an artificial neural networks study was carried out to predict the compressive strength of ground granulated blast furnace slag concrete. A data set of a laboratory work, in which a total of 45 concretes were produced, was utilized in the ANNs study. The concrete mixture parameters were three different water-cement ratios (0.3, 0.4, and 0.5), three different cement dosages (350, 400, and 450 kg/m 3 ) and four partial slag replacement ratios (20%, 40%, 60%, and 80%). Compressive strengths of moist cured specimens (22 ± 2°C) were measured at 3, 7, 28, 90, and 360 days. ANN model is constructed, trained and tested using these data. The data used in the ANN model are arranged in a format of six input parameters that cover the cement, ground granulated blast furnace slag, water, hyperplasticizer, aggregate and age of samples and, an output parameter which is compressive strength of concrete. The results showed that ANN can be an alternative approach for the predicting the compressive strength of ground granulated blast furnace slag concrete using concrete ingredients as input parameters.
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
Advances in Engineering Software, 2009
In this study, an artificial neural networks study was carried out to predict the compressive str... more In this study, an artificial neural networks study was carried out to predict the compressive strength of ground granulated blast furnace slag concrete. A data set of a laboratory work, in which a total of 45 concretes were produced, was utilized in the ANNs study. The concrete mixture parameters were three different water-cement ratios (0.3, 0.4, and 0.5), three different cement dosages (350, 400, and 450 kg/m 3 ) and four partial slag replacement ratios (20%, 40%, 60%, and 80%). Compressive strengths of moist cured specimens (22 ± 2°C) were measured at 3, 7, 28, 90, and 360 days. ANN model is constructed, trained and tested using these data. The data used in the ANN model are arranged in a format of six input parameters that cover the cement, ground granulated blast furnace slag, water, hyperplasticizer, aggregate and age of samples and, an output parameter which is compressive strength of concrete. The results showed that ANN can be an alternative approach for the predicting the compressive strength of ground granulated blast furnace slag concrete using concrete ingredients as input parameters.
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...
... Fatih ALTUN*, H. Bekir KARA, Erdal UNCUOĞLU, Okan KARAHAN Erciyes Üniversitesi, Mühendislik F... more ... Fatih ALTUN*, H. Bekir KARA, Erdal UNCUOĞLU, Okan KARAHAN Erciyes Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü ... Deprem yükleri etkisi altında betonarme karkas yapıların taşıyıcı elemanlarında çeşitli şekillerde yapısal hasarlar meydana gelmektedir. ...
Materials & Design, 2011
This paper reports of a comprehensive study on the durability properties of concrete containing p... more This paper reports of a comprehensive study on the durability properties of concrete containing polypropylene fiber and fly ash. Properties studied include unit weight and workability of fresh concrete, and compressive strength, modulus of elasticity, porosity, water absorption, sorptivity coefficient, drying shrinkage and freeze-thaw resistance of hardened concrete. Fly ash content used in concrete mixture was 0%, 15% and 30% in mass basis, and fiber volume fraction was 0%, 0.05%, 0.10% and 0.20% in volume basis.
Journal of Zhejiang University Science, 2008
In this study, an artificial neural network (ANN) model for studying the strength properties of s... more In this study, an artificial neural network (ANN) model for studying the strength properties of steel fiber reinforced concrete (SFRC) containing fly ash was devised. The mixtures were prepared with 0 wt%, 15 wt%, and 30 wt% of fly ash, at 0 vol.%, 0.5 vol.%, 1.0 vol.% and 1.5 vol.% of fiber, respectively. After being cured under the standard conditions for 7, 28, 90 and 365 d, the specimens of each mixture were tested to determine the corresponding compressive and flexural strengths. The parameters such as the amounts of cement, fly ash replacement, sand, gravel, steel fiber, and the age of samples were selected as input variables, while the compressive and flexural strengths of the concrete were chosen as the output variables. The back propagation learning algorithm with three different variants, namely the Levenberg-Marquardt (LM), scaled conjugate gradient (SCG) and Fletcher-Powell conjugate gradient (CGF) algorithms were used in the network so that the best approach can be found. The results obtained from the model and the experiments were compared, and it was found that the suitable algorithm is the LM algorithm. Furthermore, the analysis of variance (ANOVA) method was used to determine how importantly the experimental parameters affect the strength of these mixtures.
Puzolan olarak, tras, öğütülmüş şist gibi doğal puzolanların yanı sıra, yüksek fırın cürufu, uçuc... more Puzolan olarak, tras, öğütülmüş şist gibi doğal puzolanların yanı sıra, yüksek fırın cürufu, uçucu kül, silika füme gibi endüstriyel puzolanların hepsini kabul etmesinden dolayı, Kayseri civarındaki iki çimento fabrikasında ve ülkenin diğer birçok çimento fabrikasında TS-12143'te tanımlanan "Portland Kompoze Çimento" nun PKÇ/B-32.5R türü üretilmektedir. Öğütülmüş klinker puzolan katkısız halde iken dayanım bazına göre bir üst sınıf olan PÇ-42.5 oluşturmaktadır. Dolayısıyla, Kayseri yöresi çimento fabrikalarında PÇ-42.5 ve PKÇ/B-32.5R türü çimentolar piyasaya sunulmakta, PÇ-32.5 bulunmamaktadır. Bu deneysel çalışmada, PÇ-42.5 ve PKÇ/B-32.5R ile aynı çimento dozajı ve reçete ile üretilen betonların, 2-günlük, 7-günlük, 28-günlük, 180-günlük ve 360-günlük dayanımları karşılaştırılmıştır.
Construction and Building Materials, 2009
... examined previously is the effect of steel fiber additions on the mechanical and durability p... more ... examined previously is the effect of steel fiber additions on the mechanical and durability properties of fly ... of fresh mix properties of fiber reinforced fly ash concrete was conducted based on TS ... VB time is more sensitive not only towards steel fiber addition but also fly ash addition. ...
Construction and Building Materials, 2009
... Duran Atiş a , Corresponding Author Contact Information , E-mail The Corresponding Author , C... more ... Duran Atiş a , Corresponding Author Contact Information , E-mail The Corresponding Author , Cahit Bilim b , Özlem Çelik c and ... Cem Concr Res 2003;33(12): 20316]. The aim of this study was to investigate the feasibility of ... Oxide, SiO 2, Al 2 O 3, Fe 2 O 3, CaO, MgO, SO 3, K 2 O, ...
Advances in Engineering Software, 2009
In this study, an artificial neural network (ANN) and fuzzy logic (FL) study were developed to pr... more In this study, an artificial neural network (ANN) and fuzzy logic (FL) study were developed to predict the compressive strength of silica fume concrete. A data set of a laboratory work, in which a total of 48 concretes were produced, was utilized in the ANNs and FL study. The ...
Cement & Concrete Composites, 2006
Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind ... more Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind is extremely important from the aspects of (1) groundwater contamination and (2) durability of the pipes. In this study, water-tightness tests were applied on plain concrete, ...
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
Cement & Concrete Composites, 2006
Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind ... more Water-tightness of concrete and reinforced concrete pipes used to convey sewage flow of any kind is extremely important from the aspects of (1) groundwater contamination and (2) durability of the pipes. In this study, water-tightness tests were applied on plain concrete, ...
Advances in Engineering Software, 2009
In this study, an artificial neural networks study was carried out to predict the compressive str... more In this study, an artificial neural networks study was carried out to predict the compressive strength of ground granulated blast furnace slag concrete. A data set of a laboratory work, in which a total of 45 concretes were produced, was utilized in the ANNs study. The concrete mixture parameters were three different water-cement ratios (0.3, 0.4, and 0.5), three different cement dosages (350, 400, and 450 kg/m 3 ) and four partial slag replacement ratios (20%, 40%, 60%, and 80%). Compressive strengths of moist cured specimens (22 ± 2°C) were measured at 3, 7, 28, 90, and 360 days. ANN model is constructed, trained and tested using these data. The data used in the ANN model are arranged in a format of six input parameters that cover the cement, ground granulated blast furnace slag, water, hyperplasticizer, aggregate and age of samples and, an output parameter which is compressive strength of concrete. The results showed that ANN can be an alternative approach for the predicting the compressive strength of ground granulated blast furnace slag concrete using concrete ingredients as input parameters.
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
Advances in Engineering Software, 2009
In this study, an artificial neural networks study was carried out to predict the compressive str... more In this study, an artificial neural networks study was carried out to predict the compressive strength of ground granulated blast furnace slag concrete. A data set of a laboratory work, in which a total of 45 concretes were produced, was utilized in the ANNs study. The concrete mixture parameters were three different water-cement ratios (0.3, 0.4, and 0.5), three different cement dosages (350, 400, and 450 kg/m 3 ) and four partial slag replacement ratios (20%, 40%, 60%, and 80%). Compressive strengths of moist cured specimens (22 ± 2°C) were measured at 3, 7, 28, 90, and 360 days. ANN model is constructed, trained and tested using these data. The data used in the ANN model are arranged in a format of six input parameters that cover the cement, ground granulated blast furnace slag, water, hyperplasticizer, aggregate and age of samples and, an output parameter which is compressive strength of concrete. The results showed that ANN can be an alternative approach for the predicting the compressive strength of ground granulated blast furnace slag concrete using concrete ingredients as input parameters.
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
Building and Environment, 2005
This paper reports a part of an ongoing laboratory investigation in which the compressive strengt... more This paper reports a part of an ongoing laboratory investigation in which the compressive strength of silica fume concrete is studied under dry and wet curing conditions. In the study, a total of 48 concretes, including control Portland cement concrete and silica fume concrete, were produced with four different water-cement ratios (0.3, 0.4, 0.5, 0.6), three different cement dosages (350, 400, 450 kg/m 3 ) and three partial silica fume replacement ratios (10%, 15%, 20%). A hyperplastisizer was used in concrete at various quantities to provide and keep a constant workability. Three cubic samples produced from fresh concrete were demoulded after a day; then, they were cured at 2072 1C with 65% relative humidity (RH), and three other cubic samples were cured at 2072 1C with 100% RH until the samples were used for compressive strength measurement at 28 days. The comparison was made on the basis of compressive strength between silica fume concrete and control Portland cement concrete. Silica fume concretes were also compared among themselves. The comparisons showed that compressive strength of silica fume concrete cured at 65% RH was influenced more than that of Portland cement concrete. It was found that the compressive strength of silica fume concrete cured at 65% RH was, at average, 13% lower than that of silica fume concrete cured at 100% RH. The increase in the water-cementitious material ratios makes the concrete more sensitive to dry curing conditions. The influence of dry curing conditions on silica fume concrete was marked as the replacement ratio of silica fume increased. r
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yo... more 1 Erciyes Üniversitesi Müh. Fak. İnş. Müh. Bölümü 38039 KAYSERİ/TÜRKİYE 2 Erciyes Üniversitesi Yozgat Müh. Mim. Fak. İnş. Müh. Bölümü YOZGAT/TÜRKİYE
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...
Journal of Materials in Civil Engineering, 2009
[Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamu... more [Journal of Materials in Civil Engineering 21, 402 (2009)]. Cengiz Duran Atis, Okan Karahan, Kamuran Ari, Özlem Celik Sola, Cahit Bilim. Abstract. ... Experimental Setup. Materials. Cement. The cement used was CEM I 42,5 R with a specific gravity of 3.16. ...