Key Engineering Materials Vol. 970

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</div> <div class="right-content col-md-8 col-sm-7 col-xs-12"> <div class="bread-crumbs hidden-xs"> <a class="bread-crumbs-first" href="/">Home</a><i class="inline-icon arrow-breadcrumbs"></i><a class="bread-crumbs-first" href="/KEM">Key Engineering Materials</a><i class="inline-icon arrow-breadcrumbs"></i><span class="bread-crumbs-second">Key Engineering Materials Vol. 970</span></div> <div class="page-name-block underline-begin"> <h1 class="page-name-block-text">Key Engineering Materials Vol. 970</h1> </div> <div class="clearfix title-details"> <div class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>DOI:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="https://doi.org/10.4028/v-3QQzZX">https://doi.org/10.4028/v-3QQzZX</a></p> </div> </div> </div> </div> <div id="titleMarcXmlLink" style="display: none" class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>Export:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="/KEM.970/marc.xml">MARCXML</a></p> </div> </div> </div> </div> <div class="papers-block-info col-lg-12"> <div class="row"> <div class="info-row-name normal-text-gray col-md-2 col-sm-3 col-xs-4"> <div class="row"> <p>ToC:</p> </div> </div> <div class="info-row-content semibold-middle-text col-md-10 col-sm-9 col-xs-8"> <div class="row"> <p><a href="/KEM.970_toc.pdf">Table of Contents</a></p> </div> </div> </div> </div> </div> <div class="volume-tabs"> </div> <div class=""> <div class="volume-papers-page"> <div class="block-search-pagination clearfix"> <div class="block-search-volume"> <input id="paper-search" type="search" placeholder="Search" maxlength="65"> </div> <div class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/KEM.970/2">2</a></li><li><a href="/KEM.970/3">3</a></li><li class="PagedList-skipToNext"><a href="/KEM.970/2" rel="next">></a></li></ul></div> </div> <div class="block-volume-title normal-text-gray"> <p> Paper Title <span>Page</span> </p> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.-1">Preface</a> </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.3">Evaluation of the Thermomechanical Response of Geopolymeric Mortars Manufactured from Peruvian Mining Residues and its Comparison with Portland Cement Mortars</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Cris Katherin Palomino-Ñaupa, V.C. Bringas-Rodríguez, F.A. Huamán-Mamani </div> </div> <div id="abstractTextBlock606397" class="volume-info volume-info-text volume-info-description"> Abstract: Geopolymeric mortars made from a mixture of waste from the Peruvian informal mining industry, sodium hydroxide activating solution, and fine sand were studied, comparing them physically and mechanically with conventional Portland cement mortars. Both conventional and geopolymeric mortars were prepared in parallel and then subjected to uniaxial compression tests at various temperatures (ambient, 200 掳C and 500 掳C). The mechanical results found revealed maximum average resistance values of 63, 84 and 79 MPa for conventional mortars, and 12, 32 and 36 MPa for geopolymeric mortars, when they were tested at room temperature, 200 掳C and 500 掳C, respectively. The best mechanical results in geopolymeric mortars were found when considering a binder: fine sand ratio of 1:2, molarity of the hardening solution of 12 M and a hardening solution: binder ratio of 0.6. It was possible to demonstrate a good agreement between the distribution of particle sizes observed microstructurally and those found by granulometry studies by laser light diffraction. </div> <div> <a data-readmore="{ block: '#abstractTextBlock606397', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 3 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.11">X-Ray Diffraction Comparison Study of Binders Derived from Pure C<sub>3</sub>S and Portland Cement Paste</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Abdellatif Abidar, Othmane Bouchenafa, Rabah Hamzaoui, Céline Florence, Sandrine Mansoutre, Laury Barnes Davin, Claire Capra, Bruno Classen </div> </div> <div id="abstractTextBlock603907" class="volume-info volume-info-text volume-info-description"> Abstract: The purpose of this study is to compare binders of two different origins. The powders obtained from crushing pure C<sub>3</sub>S and hydrated cement for 28 days with w/b=0.6 and 0.5, respectively, will be subjected to heat treatment at 800掳C. This work used X-ray diffraction (XRD) as a technique to characterize. According to X-ray diffraction, heat treatment resulted in the synthesis of 尾-C<sub>2</sub>S belite in the pure phase and two polymorphs 伪'-C<sub>2</sub>S and 尾-C<sub>2</sub>S in the cement phase. The binder regenerated from cement pastes generates C-S-H at an early stage, which can be attributed to the high reactivity of the 伪'-C<sub>2</sub>S polymorph. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603907', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 11 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.17">Performance of Metakaolin-Based Geopolymer Incorporating Recycled Plastic Aggregate</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Yousef R. Alharbi </div> </div> <div id="abstractTextBlock605964" class="volume-info volume-info-text volume-info-description"> Abstract: Recently, research has been devoted to producing a more sustainable and environmentally friendly composite for substituting conventional cement concrete. This supports the global effort toward limiting the environmental impact of cement production. Geopolymer composites or alkali-activated materials have gained more attention within the research community due to the wide availability of waste (e.g., fly ash, slag) or natural (metakaolin, pozzolans) source materials suitable for geopolymer production. The present study investigates the potential of producing metakaolin-based geopolymer mortars with partial substitution of natural sand by recycled plastic fine aggregate (RPFA) to enhance composite sustainability. The primary variables of the experimental program include the percentage replacement of fine natural aggregate by RPFA (0, 10, 20, and 30% by volume). Tests comprising flowability, compressive strength, Flexural strength and unit weight of the various mixes were evaluated. The results indicated that replacing 10%, 20%, and 30% of sand with RPFA caused a reduction in the compressive strength by 10.6%, 21.8%, and 33.9% relative to the control mix. The flexural strength also decreased by 17.5%, 22.4%, and 30.4% compared to the control mix. Although substituting natural aggregate with RPFA reduced the mechanical properties, it improved the mix flowability by up to 20% relative to the control mix. Additionally, a reduction in the unit weight by up to 16.2% relative to the control mix was obtained, which offer a viable mean of producing lightweight mortar. </div> <div> <a data-readmore="{ block: '#abstractTextBlock605964', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 17 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.25">Mechanical Evaluation of Geopolymer Mortars Derived from Gold Mining Tailings under Differents Atmospheres</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: L.Y. Rosell-Paredes, Cris Katherin Palomino-Ñaupa, V.C. Bringas-Rodríguez, F.A. Huamán-Mamani </div> </div> <div id="abstractTextBlock606102" class="volume-info volume-info-text volume-info-description"> Abstract: In this work, geopolymeric mortars made from formal and informal gold mining tailings (Peru) were studied in order to analyze their durability and mechanical resistance in compression. The manufactured mortars were subjected to uniaxial compression tests in four atmosphere conditions: dry air (0% humidity), saline air (5% with sodium cholride), humid air (99% relative humidity) and normal air (with relative humidity at 25%). During the compression tests, the thermoresistance at room temperature (between 11), 200 掳C and 500 掳C were also evaluated. The results obtained were contrasted with the mechanical resistance of mortars made with conventional cement (Control). The real density and porosity of the different mortars studied were also evaluated, finding real density and porosity values of 2.42 g/cm3 and 19%, 2.62 g/cm3 and 32%; and 2.71 g/cm3 and 36% for conventional cement mortars (Control), tailings geopolymeric mortars from informal mining (GI) and tailings geopolymeric mortars from formal mining (GF), respectively. The mechanical results obtained show average values of maximum compressive strength of 86 MPa, 23 MPa and 19 MPa for Control mortars, GI mortars and GF mortars, respectively. It was also possible to appreciate that the geopolymeric mortars presented cracks, superficial efflorescence, affecting the mechanical resistance in humid and saline atmosphere conditions. The simulated climatic conditions, in which it could have a better mechanical behavior, is a normal atmosphere and dry air. Regarding the evaluation of thermoresistance, they were at a temperature of 500掳C, which presented greater mechanical resistance. </div> <div> <a data-readmore="{ block: '#abstractTextBlock606102', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 25 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.33">Development of Ultra-High Performance Geopolymer Concrete Containing Recycled Fine Aggregate Replacement</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Aref A. Abadel </div> </div> <div id="abstractTextBlock605967" class="volume-info volume-info-text volume-info-description"> Abstract: The construction industry continually strives to enhance sustainability and reduce environmental impact. Developing innovative concrete materials that utilize recycled aggregates and alternative cementitious binders has gained significant attention in this context. This abstract presents a study on developing ultra-high-performance geopolymer concrete (UHPGC) by replacing fine aggregates with recycled materials. This research aims to develop UHPGC by incorporating recycled fine aggregate waste (RFAW) as a partial replacement for fine aggregate. Four different concrete mixes were prepared and tested to evaluate RFAW's influence on the performance of UHPGC, considering replacements of up to 30% of fine aggregate. The study examined the fresh properties and mechanical characteristics of the resulting material. The experimental outcomes demonstrated that adding RFAW enhanced the workability of fresh concrete, making it more easily manageable. However, the mechanical properties of the hardened concrete were slightly affected to some extent. Specifically, the compressive strength decreased from 119 MPa to 103 MPa when 30% RAW was added. Conversely, with lower replacement percentages of 10% and 20%, the concrete exhibited no reduction in strength compared to the 30% replacement levels. This reduction in strength could be attributed to a weaker bond between the geopolymer gel and the recycled fine aggregate particles. Additionally, it was observed that as the proportion of RFAW increased, the water absorption of the UHPGC also increased. This indicates that the concrete had a higher tendency to absorb moisture. Nevertheless, the findings suggest that RFAW waste could be a viable resource for producing environmentally friendly UHPGC with improved physical, mechanical, and durability properties with appropriate optimization. The outcomes of this study can promote sustainable construction practices by reducing the reliance on virgin materials and promoting the circular economy within the civil engineering industry. </div> <div> <a data-readmore="{ block: '#abstractTextBlock605967', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 33 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.43">Effect of Ground Granulated Blast-Furnace Slag on the Bond Strength of Recycled Aggregate Concrete</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Chung Hao Wu, Shu-Ken Lin </div> </div> <div id="abstractTextBlock603787" class="volume-info volume-info-text volume-info-description"> Abstract: This research experimentally investigated the bond strength of recycled aggregate concrete containing high volume ground granulated blast-furnace slag (GGBFS). Concrete mixtures made with 0%, 15%, 45% and 75% replacement of cement with GGBFS were prepared. Water-to-binder ratios ranged from 0.30 to 0.50. The fresh properties, compressive strength and pullout bond strength of concrete were measured and presented. Test results shows that the compressive strength and bond strength of concrete containing GGBFS were superior to the concrete without GGBFS at all ages. In addition, the bond strength of the recycled aggregate concrete containing high volume GGBFS (75% cement replacement) could exceed that of natural aggregate concrete without GGBFS. This result shows that it is feasible for applying recycled aggregate concrete incorporating high volume GGBFS in concrete constructions. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603787', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 43 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.49">Crumb Rubber in Alkaline Activated Clay Roof Tiles at Low Temperature</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Aswin Kumar Krishnan, Yat Choy Wong, Reiza Mukhlis, Arul Arulrajah, Zi Peng Zhang </div> </div> <div id="abstractTextBlock603777" class="volume-info volume-info-text volume-info-description"> Abstract: The continuous increase in vehicle uptake escalates the number of rubber tyre waste to avoid landfilling and stockpiling. The present research focused on the sustainable use of crumb rubber in clay roof tiles. Tile samples were fabricated by heating the compacted mixtures at 50掳C for 72 h, followed by increasing the temperature to 200掳C for 24 h. Clay, crumb rubber, NaOH, and Na<sub>2</sub>SiO<sub>3</sub> with a 10% alkaline activator were adopted. The weight of the crumb rubber was 0.5%, 1%, 1.5%, 2%, and 2.5%. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses to study the phases and microstructures of the samples. The present study found that the optimum crumb rubber concentration was 0.5%, and 1% satisfied the standard requirement for the roof tiles. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603777', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 49 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.55">Tensile Strength Determination for Rice Husk Ash and Corn Cob Ash Blended Cement Concrete</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Temitayo Opeyemi Oyerinde, Margaret Damilola Oyewole, Olaniyi Alake, Favour David Agbajor, Modupe Cecilia Mewomo </div> </div> <div id="abstractTextBlock604107" class="volume-info volume-info-text volume-info-description"> Abstract: This study concerns the determination of the tensile strength of concrete produced by partially replacing cement with rice husk ash (RHA) and corn cob ash (CCA). The tensile strength of RHA and CCA blended cement concrete and its suitability as sustainable green concrete materials were investigated. Cubes of 100x 100 x 100 mm unmodified concrete (pure cement) and modified concrete (cement, RHA and CCA) were cast using a mix ratio of 1:2:4 containing binder (cement, RHA, CCA), sand, and coarse aggregate. Physical properties (moisture content, grain size analysis and specific gravity) of RHA and CCA, the effect of curing age and the effect of varying percentage replacement of cement with RHA and CCA blended cement concrete on the tensile strength of concrete were investigated. The varying replacement of cement with RHA and CCA were 0% (100% Cement), 10% (5% RHA, 5% CCA, 90% Cement), 20% (10% RHA, 10% CCA, 80% Cement), 30% (15% RHA, 15% CCA, 70% cement) and 40% (20% RHA, 20%CCA, 60% cement). The tensile strength of the 1:2:4 concrete mix of the unmodified concrete at 28 days strength was valued to be 3.39 N/mm<sup>2</sup> while that of modified concrete of 10%, 20%, 30% and 40% RHA, and CCA are 3.30, 2.74, 2.69 and 1.63 N/mm<sup>2</sup> respectively, showing that tensile strength of concrete decreases with an increasing amount of RHA and CCA and increases with an increasing number of curing age. This research suggests that RHA and CCA concrete of 10% can be used to produce concrete for structural members, while 20%, 30% and 40% of concrete can be used for weak concrete where filling and other minor works are required. </div> <div> <a data-readmore="{ block: '#abstractTextBlock604107', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 55 </div> </div> <div class="item-block"> <div class="item-link"> <a href="/KEM.970.61">Effectiveness of Carbide Lime Waste as CO<sub>2 </sub>Capturing Materials of Mortar at Early CO<sub>2 </sub>Curing Age</a> </div> <div class="item-link volume-authors"> <div class="semibold-middle-text"> Authors: Asyrofuddin Fadhlullah, Berlianada Rizki Priandita, Adrina Rosseira Abu Talip, Nur Hafizah Abd Khalid </div> </div> <div id="abstractTextBlock603870" class="volume-info volume-info-text volume-info-description"> Abstract: This study explored the use of Carbide Lime Waste (CLW) in mortar production and its exposure to controlled CO<sub>2</sub> curing for 24 hours. The results indicate that CLW mortar under CO<sub>2</sub> curing has improved compressive strength and early CO<sub>2</sub> capturing performance due to the reaction between Ca (OH)<sub>2</sub> in CLW and CO<sub>2</sub> gas. With a cement replacement rate of 20, a 60% solid carbonates precipitation was recorded after just 7 days of curing. In general, the longer the curing durations, the higher the CO<sub>2</sub> capturing capability. Further investigations into the long-term mechanical and durability properties are recommended to assess its feasibility for practical applications. Re-utilization of waste materials like CLW can make significant strides towards more eco-friendly and sustainable practices. </div> <div> <a data-readmore="{ block: '#abstractTextBlock603870', lines: 2, expandText: '...more', collapseText: '...less' }"></a> </div> <div class="page-number semibold-large-text"> 61 </div> </div> <div class="block-bottom-pagination"> <div class="pager-info"> <p>Showing 1 to 10 of 21 Paper Titles</p> </div> <div class="pagination-container"><ul class="pagination"><li class="active"><span>1</span></li><li><a href="/KEM.970/2">2</a></li><li><a href="/KEM.970/3">3</a></li><li class="PagedList-skipToNext"><a href="/KEM.970/2" rel="next">></a></li></ul></div> </div> </div> </div> </div> </div> </div> </div> <div class="social-icon-popup"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-popup-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-popup-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-popup-icon social-icon"></i></a> </div> </div> <div class="sc-footer"> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="footer-menu col-md-12 col-sm-12 col-xs-12"> <ul class="list-inline menu-font"> <li><a href="/ForLibraries">For Libraries</a></li> <li><a href="/ForPublication/Paper">For Publication</a></li> <li><a href="/insights" target="_blank">Insights</a></li> <li><a href="/DocuCenter">Downloads</a></li> <li><a href="/Home/AboutUs">About Us</a></li> <li><a href="/PolicyAndEthics/PublishingPolicies">Policy & Ethics</a></li> <li><a href="/Home/Contacts">Contact Us</a></li> <li><a href="/Home/Imprint">Imprint</a></li> <li><a href="/Home/PrivacyPolicy">Privacy Policy</a></li> <li><a href="/Home/Sitemap">Sitemap</a></li> <li><a href="/Conferences">All Conferences</a></li> <li><a href="/special-issues">All Special Issues</a></li> <li><a href="/news/all">All News</a></li> <li><a href="/read-and-publish-agreements">Read & Publish Agreements</a></li> </ul> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12"> <a href="https://www.facebook.com/Scientific.Net.Ltd/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon facebook-footer-icon social-icon"></i></a> <a href="https://twitter.com/Scientific_Net/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon twitter-footer-icon social-icon"></i></a> <a href="https://www.linkedin.com/company/scientificnet/" target="_blank" rel="noopener" title="Scientific.Net"><i class="inline-icon linkedin-footer-icon social-icon"></i></a> </div> </div> </div> </div> <div class="line-footer"></div> <div class="footer-fluid"> <div class="container"> <div class="row"> <div class="col-xs-12 footer-copyright"> <p> © 2024 Trans Tech Publications Ltd. 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