The deterioration of concrete from acid corrosion is a common issue in various industrial and natural environments. To address this problem, coal fly ash and bagasse fly ash were utilized as cement replacements in concrete. This study investigates the effects of these ashes on concrete's ability to withstand organic acid corrosion in depth, including a thorough examination of their chemical compositions, physical properties, and interactions within the concrete matrix. Furthermore, the research involves adjusting the blend proportions to provide exceptional resistance to acid corrosion. The results of the study highlight the significance of coal fly ash and bagasse fly ash in improving concrete's resistance to organic acid corrosion. The use of these materials as cement replacements significantly enhances concrete's resistance to organic acid corrosion, and this improvement becomes more apparent as substitution rates increase. This effect is primarily attributed to increased pozzolanic reactivity, resulting in a reduction in calcium hydroxide concentration within the cement matrix.
{"title":"Increasing Concrete Durability Against Organic Acid Corrosion with Coal Fly Ash and Bagasse Fly Ash as Cement Replacements","authors":"Jensak Koschanin, P. Julphunthong","doi":"10.4028/p-tm8lwe","DOIUrl":"https://doi.org/10.4028/p-tm8lwe","url":null,"abstract":"The deterioration of concrete from acid corrosion is a common issue in various industrial and natural environments. To address this problem, coal fly ash and bagasse fly ash were utilized as cement replacements in concrete. This study investigates the effects of these ashes on concrete's ability to withstand organic acid corrosion in depth, including a thorough examination of their chemical compositions, physical properties, and interactions within the concrete matrix. Furthermore, the research involves adjusting the blend proportions to provide exceptional resistance to acid corrosion. The results of the study highlight the significance of coal fly ash and bagasse fly ash in improving concrete's resistance to organic acid corrosion. The use of these materials as cement replacements significantly enhances concrete's resistance to organic acid corrosion, and this improvement becomes more apparent as substitution rates increase. This effect is primarily attributed to increased pozzolanic reactivity, resulting in a reduction in calcium hydroxide concentration within the cement matrix.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141827072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Goonewardena, M. Ashraf, Mahbube Subhani, B. Kafle, Johannes Reiner
Bamboo scrimber is a promising engineered bamboo material in the construction sector due to its favourable mechanical and aesthetic properties. Although considerable research on mechanical properties has been conducted, there is a gap in the knowledge of slenderness limits for short columns of bamboo scrimber. Slenderness limits suggested in four testing and structural design standards that are commonly used for engineered bamboo have been critically analysed and compared to identify their relative shortcomings. From these standards, Eurocode 5 proposes a better limit while the others behave conservatively. Owing to the lack of a design standard for engineered bamboo, researchers abide by standards compiled for timber/engineered timber to predict the compressive response of intermediate and long columns. In addition to showing the limitations of these studies, a rational column equation has been derived with a modified Euler load that yields reasonable accuracy with respect to two experimental studies.
{"title":"Slenderness Limits and Buckling Response of Bamboo Scrimber under Axial Compression","authors":"J. Goonewardena, M. Ashraf, Mahbube Subhani, B. Kafle, Johannes Reiner","doi":"10.4028/p-nadnw6","DOIUrl":"https://doi.org/10.4028/p-nadnw6","url":null,"abstract":"Bamboo scrimber is a promising engineered bamboo material in the construction sector due to its favourable mechanical and aesthetic properties. Although considerable research on mechanical properties has been conducted, there is a gap in the knowledge of slenderness limits for short columns of bamboo scrimber. Slenderness limits suggested in four testing and structural design standards that are commonly used for engineered bamboo have been critically analysed and compared to identify their relative shortcomings. From these standards, Eurocode 5 proposes a better limit while the others behave conservatively. Owing to the lack of a design standard for engineered bamboo, researchers abide by standards compiled for timber/engineered timber to predict the compressive response of intermediate and long columns. In addition to showing the limitations of these studies, a rational column equation has been derived with a modified Euler load that yields reasonable accuracy with respect to two experimental studies.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141827926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andre Jhoel Lamas Chavez, Alvaro Fabrizio Aliaga Guevara, Pablo Jhoel Peña Torres
Growing concerns about sustainability and the search for greener alternatives in construction have led to a renewed interest in recycled concrete as a building material. Recycled concrete is produced using recycled aggregates, such as construction and demolition debris, instead of virgin aggregates, which reduces the demand for natural resources and the accumulation of waste. However, the viability of recycled concrete in high-temperature applications, such as fires or exposure to extremely high temperatures, has come under critical scrutiny. In this study we are going to talk about the differences between conventional concrete and concrete with recycled aggregate after being exposed to high temperatures, we will focus on issues of resistance to compression, traction and modulus of elasticity. We were able to obtain in our tests that the greater the amount of recycled aggregate that we use in the concrete, the lower mechanical properties we obtain with respect to conventional concrete after being exposed to high temperatures, this is due to the adhered mortar that the recycled aggregate presents (in in our case 42% adhered mortar).
{"title":"Evaluation of the Mechanical Properties of Recycled Coarse Aggregate Concrete against the Action of Fire","authors":"Andre Jhoel Lamas Chavez, Alvaro Fabrizio Aliaga Guevara, Pablo Jhoel Peña Torres","doi":"10.4028/p-k0uuxp","DOIUrl":"https://doi.org/10.4028/p-k0uuxp","url":null,"abstract":"Growing concerns about sustainability and the search for greener alternatives in construction have led to a renewed interest in recycled concrete as a building material. Recycled concrete is produced using recycled aggregates, such as construction and demolition debris, instead of virgin aggregates, which reduces the demand for natural resources and the accumulation of waste. However, the viability of recycled concrete in high-temperature applications, such as fires or exposure to extremely high temperatures, has come under critical scrutiny. In this study we are going to talk about the differences between conventional concrete and concrete with recycled aggregate after being exposed to high temperatures, we will focus on issues of resistance to compression, traction and modulus of elasticity. We were able to obtain in our tests that the greater the amount of recycled aggregate that we use in the concrete, the lower mechanical properties we obtain with respect to conventional concrete after being exposed to high temperatures, this is due to the adhered mortar that the recycled aggregate presents (in in our case 42% adhered mortar).","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141824834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sanchez Rosario Ronald Luis, Soto Noa Eder, Karla Lisette Lopez Pasapera
The present research work addresses the issue of development of geopolymers as an alternative to ordinary Portland cement. For which, descriptions of the materials and instruments used for the necessary tests were made. Also, the experimental methodology for the design of geopolymeric concrete was presented, in which the production process of the precursor material and the activating agent is explained. The dosages and how the four types of mixtures to be tested are composed are shown: the standard concrete (CP) and three mixtures with different replacement variables (M1, M2 and M3). In order to study the behavior and influence of brick dust, a mixture was designed with different dosages to replace the cement with the precursor in 80%, 90% and 95% alkalized by sodium hydroxide (NaOH) 12 M and rice husk ash (RHA) with a proportion of 75% - 25%, respectively. The results show that the master concrete cores presented average resistances of up to 26.52 MPa, while with a replacement of 80%, an average of 27.05 MPa was recorded, with 90% an average of 26.05 MPa and with 95%, resistances up to 22.84 MPa after 28 days of testing. These data indicate that geopolymeric concretes with partial replacement maintain acceptable physical and mechanical properties. The specific combination of replacing cement with brick dust and rice husk ash in the alkaline solution results in favorable concrete conditions. This study demonstrates the quantitative viability of using eco-efficient geopolymers with partial cement replacements, offering a more sustainable alternative in construction.
{"title":"Evaluation of the Influence of Brick Dust and Rice Husk Ash on the Mechanical and Physical Behavior of a Geopolymeric and Eco-Efficient Concrete with Partial Cement Replacements","authors":"Sanchez Rosario Ronald Luis, Soto Noa Eder, Karla Lisette Lopez Pasapera","doi":"10.4028/p-louv6n","DOIUrl":"https://doi.org/10.4028/p-louv6n","url":null,"abstract":"The present research work addresses the issue of development of geopolymers as an alternative to ordinary Portland cement. For which, descriptions of the materials and instruments used for the necessary tests were made. Also, the experimental methodology for the design of geopolymeric concrete was presented, in which the production process of the precursor material and the activating agent is explained. The dosages and how the four types of mixtures to be tested are composed are shown: the standard concrete (CP) and three mixtures with different replacement variables (M1, M2 and M3). In order to study the behavior and influence of brick dust, a mixture was designed with different dosages to replace the cement with the precursor in 80%, 90% and 95% alkalized by sodium hydroxide (NaOH) 12 M and rice husk ash (RHA) with a proportion of 75% - 25%, respectively. The results show that the master concrete cores presented average resistances of up to 26.52 MPa, while with a replacement of 80%, an average of 27.05 MPa was recorded, with 90% an average of 26.05 MPa and with 95%, resistances up to 22.84 MPa after 28 days of testing. These data indicate that geopolymeric concretes with partial replacement maintain acceptable physical and mechanical properties. The specific combination of replacing cement with brick dust and rice husk ash in the alkaline solution results in favorable concrete conditions. This study demonstrates the quantitative viability of using eco-efficient geopolymers with partial cement replacements, offering a more sustainable alternative in construction.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141825277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Vasudevan, Shantha Kumari Muniyandi, Gunavathy Kanniyapan, Lim Eng Hock
This study uses varying percentages of glass powder (GP) and ground granulated blast furnace slag (GGBS) as partial replacements for Portland cement to investigate their effects on the behavior of the concrete’s mechanical and durability properties. Due to the adverse environmental impacts of cement manufacturing, there have been efforts to replace cement with supplementary cementitious materials (SCMs) to reduce cement consumption while enhancing concrete performance. This study evaluates the effects of adding varying percentages of silica fume (SF) and ground granulated blast furnace slag (GGBFS) on the mechanical and durability properties of the modified concrete. It also evaluates their compressive, tensile, and flexural strength and conducts the Initial Surface Absorption Test (ISAT), carbonation test, and microstructure analysis using scanning electron microscopy (SEM). The research variables are partial cement replacement with varying percentages of 5%, 10%, 15%, and 20% of different pozzolanic materials. The water-cement ratio in this experiment is 0.53.
{"title":"Performance of the Mechanical and Durability Properties of Eco-Friendly Concrete Containing Glass Powder (GP) and Ground Granulated Blast Slag (GGBS)","authors":"G. Vasudevan, Shantha Kumari Muniyandi, Gunavathy Kanniyapan, Lim Eng Hock","doi":"10.4028/p-s42uur","DOIUrl":"https://doi.org/10.4028/p-s42uur","url":null,"abstract":"This study uses varying percentages of glass powder (GP) and ground granulated blast furnace slag (GGBS) as partial replacements for Portland cement to investigate their effects on the behavior of the concrete’s mechanical and durability properties. Due to the adverse environmental impacts of cement manufacturing, there have been efforts to replace cement with supplementary cementitious materials (SCMs) to reduce cement consumption while enhancing concrete performance. This study evaluates the effects of adding varying percentages of silica fume (SF) and ground granulated blast furnace slag (GGBFS) on the mechanical and durability properties of the modified concrete. It also evaluates their compressive, tensile, and flexural strength and conducts the Initial Surface Absorption Test (ISAT), carbonation test, and microstructure analysis using scanning electron microscopy (SEM). The research variables are partial cement replacement with varying percentages of 5%, 10%, 15%, and 20% of different pozzolanic materials. The water-cement ratio in this experiment is 0.53.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141825990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S.M.A. El-Gamal, Mostafa A. Sayed, Alaa Mohsen, M. Hazem, Mona M. Wetwet, F. M. Helmy, M. Ramadan
Generally, the setting time and early strength of the cementitious materials are good indications to identify their suitability to be employed as binding materials. Due to the high surface area of nanomaterials, it is considered one of the optimal solutions to modify these properties. Accordingly, this work is focused on comparing the impact of laboratory-prepared tungsten oxide nanoparticles (WO3-NP) on two cementitious materials: OPC and alkali-activated slag (AAS). The initial/final-setting time and early compressive strength up to 28-days of the OPC and AAS specimens, modified with 1, 2 wt.% WO3-NP, were investigated. The results displayed that WO3-NP has a significant impact on the acceleration of the initial/final-setting time of both binding materials. Moreover, the optimal dosage from WO3-NP (1 wt.%) upgraded the compressive strength by 19.5 and 15.1% for OPC and AAS, respectively after 7 days. The nucleation-seeds and nano-filler effect of WO3-NPs are the focal explanations behind improving these properties via the formation of strength-giving phases and then obtaining a compact microstructure as proved by XRD and SEM.
{"title":"Impact of WO3-Nanoparticles on the Setting Time and Early Strength for Different Cementitious Materials","authors":"S.M.A. El-Gamal, Mostafa A. Sayed, Alaa Mohsen, M. Hazem, Mona M. Wetwet, F. M. Helmy, M. Ramadan","doi":"10.4028/p-kfj0i5","DOIUrl":"https://doi.org/10.4028/p-kfj0i5","url":null,"abstract":"Generally, the setting time and early strength of the cementitious materials are good indications to identify their suitability to be employed as binding materials. Due to the high surface area of nanomaterials, it is considered one of the optimal solutions to modify these properties. Accordingly, this work is focused on comparing the impact of laboratory-prepared tungsten oxide nanoparticles (WO3-NP) on two cementitious materials: OPC and alkali-activated slag (AAS). The initial/final-setting time and early compressive strength up to 28-days of the OPC and AAS specimens, modified with 1, 2 wt.% WO3-NP, were investigated. The results displayed that WO3-NP has a significant impact on the acceleration of the initial/final-setting time of both binding materials. Moreover, the optimal dosage from WO3-NP (1 wt.%) upgraded the compressive strength by 19.5 and 15.1% for OPC and AAS, respectively after 7 days. The nucleation-seeds and nano-filler effect of WO3-NPs are the focal explanations behind improving these properties via the formation of strength-giving phases and then obtaining a compact microstructure as proved by XRD and SEM.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this research is to examine how the size and quantity of water hyacinth (WH) fibers impact their reinforcement of bio-based epoxy resin, with a specific focus on how these factors influence mechanical properties. The study involves utilizing specimens containing WH fiber particle sizes of 100 µm and 500 µm, combined with varying proportions of 10%, 20%, and 30% by volume. The application of sodium hydroxide (NaOH) as a chemical treatment for the fibers enhances the mechanical characteristics of the composite. The results indicate that the tensile modulus of 30WH100 exceeds that of neat epoxy by roughly 17.6%. Noteworthy is the hardness value of 10WH100 at 99.73 HRL, compared to the value of 99.98 HRL seen in neat epoxy. This implies minor differences in hardness properties across the obtained results.
{"title":"Enhancing Mechanical Properties with Water Hyacinth Fiber-Reinforced Bio-Based Epoxy Composites","authors":"Naruemon Sumrith, Nipon Bhuwakiatkhamjorn, Kittipat Keawked, Paweenvat Iamim, Chakaphan Ngaowthong","doi":"10.4028/p-7acvsi","DOIUrl":"https://doi.org/10.4028/p-7acvsi","url":null,"abstract":"The purpose of this research is to examine how the size and quantity of water hyacinth (WH) fibers impact their reinforcement of bio-based epoxy resin, with a specific focus on how these factors influence mechanical properties. The study involves utilizing specimens containing WH fiber particle sizes of 100 µm and 500 µm, combined with varying proportions of 10%, 20%, and 30% by volume. The application of sodium hydroxide (NaOH) as a chemical treatment for the fibers enhances the mechanical characteristics of the composite. The results indicate that the tensile modulus of 30WH100 exceeds that of neat epoxy by roughly 17.6%. Noteworthy is the hardness value of 10WH100 at 99.73 HRL, compared to the value of 99.98 HRL seen in neat epoxy. This implies minor differences in hardness properties across the obtained results.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141827705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The main aim of the research work is to develop a sustainable vitrimer composite that can be easily recyclable and reusable carbon fibre for secondary applications. Vitrimer materials provide opportunities for recycle thermosets and CFRP composites, however, the retained properties of composite still limit their applications. In this research work, the focus is to investigate material properties of vitamer/carbon fiber composite and the retained properties after recycling of the same. A vitrimer material has been developed using an epoxy (EP) matrix and bio-based curing agent and citric acid (CA), and finally reinforced with carbon fibre. The vitrimer materials were prepared with varying ratios of acid to the epoxy ratio between 0.30 and 0.40 to prepare the best performance vitrimer. Fourier transform infrared (FTIR) spectrometry was conducted in Transmittance mode over a range of wavelengths from 400 to 4000 cm-1. The mechanical testing carried out at room temperature under tensile loading. Results found that the Vitrimer composite could be effectively dissolved in DMF, enabling the recovery of the carbon fibers. The results of the study indicate that the EP/CA vitrimers exhibit thermomechanical properties that are comparable to those of the epoxy vitrimer cured using a petroleum-based curing agent. The most important results that demonstrate the use of EP/CA vitrimers may be a promising alternative to traditional epoxy composites in various applications.
{"title":"Carbon Fiber/Epoxy Vitrimer Composite Material for Pressure Vessels: Towards Development of Sustainable Materials","authors":"Sudhanshu Nartam, Sandip Budhe, Jinu Paul","doi":"10.4028/p-dzac8g","DOIUrl":"https://doi.org/10.4028/p-dzac8g","url":null,"abstract":"The main aim of the research work is to develop a sustainable vitrimer composite that can be easily recyclable and reusable carbon fibre for secondary applications. Vitrimer materials provide opportunities for recycle thermosets and CFRP composites, however, the retained properties of composite still limit their applications. In this research work, the focus is to investigate material properties of vitamer/carbon fiber composite and the retained properties after recycling of the same. A vitrimer material has been developed using an epoxy (EP) matrix and bio-based curing agent and citric acid (CA), and finally reinforced with carbon fibre. The vitrimer materials were prepared with varying ratios of acid to the epoxy ratio between 0.30 and 0.40 to prepare the best performance vitrimer. Fourier transform infrared (FTIR) spectrometry was conducted in Transmittance mode over a range of wavelengths from 400 to 4000 cm-1. The mechanical testing carried out at room temperature under tensile loading. Results found that the Vitrimer composite could be effectively dissolved in DMF, enabling the recovery of the carbon fibers. The results of the study indicate that the EP/CA vitrimers exhibit thermomechanical properties that are comparable to those of the epoxy vitrimer cured using a petroleum-based curing agent. The most important results that demonstrate the use of EP/CA vitrimers may be a promising alternative to traditional epoxy composites in various applications.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hermie M. Del Pilar, Carlo B. Caballero, Mike Edson T. Milano, Nikko San C. Quimio
Storm water runoff brings environmental problems like flooding and pollutant transport, not only to the residential areas but also in low elevated roads with poor to bad sewage system. Soil is a naturally porous material, and its permeable property is blocked as surface pavements are constructed, making pervious concrete an important alternative in addressing the problem caused by storm water runoff. In this study, a constant weight percentage of 15% acrylic polymer (AcP) solution on water is used for the preparation of concrete mix, resulted to an increase in strength of the PC. Another additive which is the Fly ash (FA) was used to enhance the strength of the PC partially replacing the Type I cement at 5%, 10%, 15%, and 20%. Physical (porosity and permeability) and mechanical (compression and flexural strength) properties were investigated, and the statistical tool One-Way Analysis of Variance (ANOVA) was used to analyze the results. The 20% replacement obtained the highest compressive strength at 9.89MPa, while the 15% replacement acquired the highest flexural strength at 3.57 MPa. In terms of permeability, the control mix (0% Fly ash) has the highest performance at 4.76 cm/s. The favorable result in pervious concrete proved that the use of Acrylic Polymer and fly ash blend to the cement were a useful component to further improve its mechanical properties, and acceptability of its use for flood and contaminant transport mitigation.
雨水径流不仅给居民区带来洪水和污染物迁移等环境问题，也给下水道系统不完善或不完善的低高架道路带来了环境问题。土壤是一种天然的多孔材料，其透水性会随着地面人行道的修建而被阻断，因此透水混凝土成为解决雨水径流问题的重要选择。在这项研究中，在配制混凝土拌合物时使用了重量百分比恒定为 15%的丙烯酸聚合物（AcP）水溶液，从而提高了 PC 的强度。另一种添加剂是粉煤灰 (FA)，以 5%、10%、15% 和 20% 的比例部分取代 I 类水泥，从而提高 PC 的强度。对物理（孔隙率和渗透性）和机械（压缩和弯曲强度）性能进行了研究，并使用统计工具单向方差分析（ANOVA）对结果进行了分析。20% 的替代物获得了最高的抗压强度（9.89 兆帕），而 15% 的替代物获得了最高的抗折强度（3.57 兆帕）。在渗透性方面，对照组混合物（0% 粉煤灰）的性能最高，为 4.76 厘米/秒。透水混凝土的良好结果证明，在水泥中掺入丙烯酸聚合物和粉煤灰是一种有用的成分，可进一步提高其机械性能，并提高其用于缓解洪水和污染物迁移的可接受性。
{"title":"Effect of Blending Constant Concentration of Acrylic Polymer with Varying Amount of Fly Ash to the Permeability and Strength of Large Aggregate Pervious Concrete","authors":"Hermie M. Del Pilar, Carlo B. Caballero, Mike Edson T. Milano, Nikko San C. Quimio","doi":"10.4028/p-eckdy1","DOIUrl":"https://doi.org/10.4028/p-eckdy1","url":null,"abstract":"Storm water runoff brings environmental problems like flooding and pollutant transport, not only to the residential areas but also in low elevated roads with poor to bad sewage system. Soil is a naturally porous material, and its permeable property is blocked as surface pavements are constructed, making pervious concrete an important alternative in addressing the problem caused by storm water runoff. In this study, a constant weight percentage of 15% acrylic polymer (AcP) solution on water is used for the preparation of concrete mix, resulted to an increase in strength of the PC. Another additive which is the Fly ash (FA) was used to enhance the strength of the PC partially replacing the Type I cement at 5%, 10%, 15%, and 20%. Physical (porosity and permeability) and mechanical (compression and flexural strength) properties were investigated, and the statistical tool One-Way Analysis of Variance (ANOVA) was used to analyze the results. The 20% replacement obtained the highest compressive strength at 9.89MPa, while the 15% replacement acquired the highest flexural strength at 3.57 MPa. In terms of permeability, the control mix (0% Fly ash) has the highest performance at 4.76 cm/s. The favorable result in pervious concrete proved that the use of Acrylic Polymer and fly ash blend to the cement were a useful component to further improve its mechanical properties, and acceptability of its use for flood and contaminant transport mitigation.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141825224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Noottiyaporn Suwantrakit, P. Sujaridworakun, O. Boondamnoen
This study was focused on the incorporation of ZnO on natural rubber (NR) films using acrylic as a binder. Firstly, the dispersion of ZnO was prepared by dispersing ZnO into a mixture of acrylic emulsion and sodium cocoyl isethionate (SCI). The concentrations of acrylic emulsion were observed at 0.1 % and 0.5 %w/v while the ratio of ZnO:SCI was fixed at 1:0.25. The result shows higher concentration of acrylic emulsion could provide higher dispersion stability compared to the lower concentration. Subsequently, NR films were coated with ZnO through two-pot and one-pot methods. It was found that the surface of NR film from two-pot method (2P_film) presented uneven distribution of the ZnO while plate structure of ZnO and acrylic were observed on films surfaces one-pot method (1P0.1_film and 1P0.5_film). The Zn content on 2P_film surfaces observed by EDS was found at 14 % while 1P0.1_film and 1P0.5_film contain at 28 % and 19 %, respectively, due to higher concentration acrylic emulsion results a greater polymer network anchoring on the ZnO. The reductions of antibacterial of 2P_film, 1P0.1_film and 1P0.5_film are similar results at over 99%. It reveals that the low content of ZnO could sufficiently achieve an excellent antibacterial performance. Nevertheless, the lower concentration of ZnO/Acrylic will be conducted in further study.
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