{"title":"Influence of High-Density Polyethylene Admixtures on Water Sorptivity Behaviour of Medium and High strength Concretes","authors":"Iorwuese Anum","doi":"10.58757/jscbe.ihdpawsbmhsc.01","DOIUrl":"https://doi.org/10.58757/jscbe.ihdpawsbmhsc.01","url":null,"abstract":"The increasing research interest in the reuse of waste plastics have presented vast potentials for improving concrete properties and contributing to sustainable concrete production. This work studied the sorptivity behaviour of grades M25 and M50 concretes prepared using pulverised high density polyethylene (HDPE) immersed in 20% hydrogen peroxide as treatment. As an additive, the pulverised HDPE was added to the concrete at 0 %, 0.25 %, 0.5 %, 0.75 %, and 1 % based on cement weight. The concrete had been made with 150 mm3 steel moulds using mix design method. A super plasticiser -Hydroplast-500, was used in the mixes. For the grades M25 and M50 concretes, respectively, 0.4 and 0.36 water/cement ratios had been selected to represent medium and high strengths concretes after 7, 28, and 90-day periods of water cure. After being taken from the water and dried, the concrete cubes underwent a sorptivity test. Results obtained indicated that incorporation of treated HDPE to the concrete reduced its sorptivity up to 59 % and 64.5 % respectively for grades M25 and M50 concretes due to the admixture's existence in the mix. The study recommends concrete prepared with 1 % HDPE by weight of cement for use in water retaining structures, drainage systems and constructions where damp is a challenge to existing infrastructure.","PeriodicalId":476709,"journal":{"name":"Journal of Sustainable Cities and Built Environment","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861167","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}
{"title":"Emergency Architecture Towards Temporary Educational Facilities for Children of Internally Displaced Persons (IDPs) in Northern Syria","authors":"Dalia El Dardiry","doi":"10.58757/jscbe.eattefcidpns.02","DOIUrl":"https://doi.org/10.58757/jscbe.eattefcidpns.02","url":null,"abstract":"Internal displacement, often triggered by conflict or natural disasters, has left millions worldwide seeking refuge in temporary settlements. These camps, while providing essential necessities, face design challenges in balancing longevity and the freedom of movement for displaced individuals. Prolonged displacement, particularly for children, raises concerns about educational continuity and social cohesion. This paper explores the concept of fast-deployable shelters for IDPs using recycled maritime containers. The research stems from the observation of a large number of refugee children in all age groups requiring adequate spaces for learning, working, and social interaction. Inspired by the work of the Molham volunteer team, which aids disaster-affected communities, the study aims to propose an affordable and sustainable solution for IDP housing and social spaces. The research employs a mixed-methods approach, combining analysis of case studies and qualitative feedback from IDPs in northern Syria. This approach enables comprehensive insights into the design requirements and social needs of IDPs. The paper proposes a prototype boarding school unit constructed from recycled shipping containers. This design offers several advantages: Fast deployment allows for rapid construction, minimizing disruption to education. Provide an environmentally friendly and cost-effective solution. The modular design allows for flexibility in layout and expansion, catering to varying needs and site conditions. The design incorporates communal spaces to foster social cohesion and promote a sense of normalcy among IDPs. The proposed prototype demonstrates the potential of recycled maritime containers to provide fast-deployable, sustainable, and socially inclusive shelters for IDPs, particularly children.","PeriodicalId":476709,"journal":{"name":"Journal of Sustainable Cities and Built Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860172","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}
{"title":"Emergency Architecture Towards Temporary Educational Facilities for Children of Internally Displaced Persons (IDPs) in Northern Syria","authors":"Dalia El Dardiry","doi":"10.58757/jscbe.eattefcidpns.02","DOIUrl":"https://doi.org/10.58757/jscbe.eattefcidpns.02","url":null,"abstract":"Internal displacement, often triggered by conflict or natural disasters, has left millions worldwide seeking refuge in temporary settlements. These camps, while providing essential necessities, face design challenges in balancing longevity and the freedom of movement for displaced individuals. Prolonged displacement, particularly for children, raises concerns about educational continuity and social cohesion. This paper explores the concept of fast-deployable shelters for IDPs using recycled maritime containers. The research stems from the observation of a large number of refugee children in all age groups requiring adequate spaces for learning, working, and social interaction. Inspired by the work of the Molham volunteer team, which aids disaster-affected communities, the study aims to propose an affordable and sustainable solution for IDP housing and social spaces. The research employs a mixed-methods approach, combining analysis of case studies and qualitative feedback from IDPs in northern Syria. This approach enables comprehensive insights into the design requirements and social needs of IDPs. The paper proposes a prototype boarding school unit constructed from recycled shipping containers. This design offers several advantages: Fast deployment allows for rapid construction, minimizing disruption to education. Provide an environmentally friendly and cost-effective solution. The modular design allows for flexibility in layout and expansion, catering to varying needs and site conditions. The design incorporates communal spaces to foster social cohesion and promote a sense of normalcy among IDPs. The proposed prototype demonstrates the potential of recycled maritime containers to provide fast-deployable, sustainable, and socially inclusive shelters for IDPs, particularly children.","PeriodicalId":476709,"journal":{"name":"Journal of Sustainable Cities and Built Environment","volume":"26 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139800290","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}
{"title":"Influence of High-Density Polyethylene Admixtures on Water Sorptivity Behaviour of Medium and High strength Concretes","authors":"Iorwuese Anum","doi":"10.58757/jscbe.ihdpawsbmhsc.01","DOIUrl":"https://doi.org/10.58757/jscbe.ihdpawsbmhsc.01","url":null,"abstract":"The increasing research interest in the reuse of waste plastics have presented vast potentials for improving concrete properties and contributing to sustainable concrete production. This work studied the sorptivity behaviour of grades M25 and M50 concretes prepared using pulverised high density polyethylene (HDPE) immersed in 20% hydrogen peroxide as treatment. As an additive, the pulverised HDPE was added to the concrete at 0 %, 0.25 %, 0.5 %, 0.75 %, and 1 % based on cement weight. The concrete had been made with 150 mm3 steel moulds using mix design method. A super plasticiser -Hydroplast-500, was used in the mixes. For the grades M25 and M50 concretes, respectively, 0.4 and 0.36 water/cement ratios had been selected to represent medium and high strengths concretes after 7, 28, and 90-day periods of water cure. After being taken from the water and dried, the concrete cubes underwent a sorptivity test. Results obtained indicated that incorporation of treated HDPE to the concrete reduced its sorptivity up to 59 % and 64.5 % respectively for grades M25 and M50 concretes due to the admixture's existence in the mix. The study recommends concrete prepared with 1 % HDPE by weight of cement for use in water retaining structures, drainage systems and constructions where damp is a challenge to existing infrastructure.","PeriodicalId":476709,"journal":{"name":"Journal of Sustainable Cities and Built Environment","volume":"80 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801250","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}