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A Study on the Protection Approaches of Sulphate and Chloride Solutions Affecting on Coastal Reinforced Concrete Sub-Structures by Using Analytic Hierarchy Process and Simple Additive Weighting

Surangkana Trangkanont, Paradorn Khanongsuwan, Sirawit Rittapai


อิทธิพลของสารละลายซัลเฟตและคลอไรด์ในน้ำทะเลส่งผลให้เกิดความเสียหายต่อโครงสร้างคอนกรีตเสริมเหล็ก (ค.ส.ล.) ใต้ดินชายฝั่งทะเลเป็นอย่างมาก งานวิจัยนี้จึงมีวัตถุประสงค์เพื่อศึกษาเกณฑ์ที่ใช้ในการคัดเลือกวัสดุก่อสร้างด้วยกระบวนการตัดสินใจแบบวิเคราะห์เชิงลำดับชั้น และวัสดุก่อสร้างที่เหมาะสมต่อการนำไปใช้งานภายใต้เกณฑ์ดังกล่าวด้วยวิธีการรวมแบบถ่วงน้ำหนักอย่างง่าย เพื่อหาแนวทางการป้องกันความเสียหาย โดยการทบทวนวรรณกรรม เก็บข้อมูลเบื้องต้นจากกรณีศึกษา แล้วทำการวิเคราะห์เนื้อหา จากนั้นให้ผู้เชี่ยวชาญ 5 ท่าน ที่มีประสบการณ์วิศวกรรมชายฝั่งมากกว่า 10 ปี ตรวจสอบความเที่ยงตรง และทำการวิเคราะห์ข้อมูลด้วยกระบวนการตัดสินใจแบบวิเคราะห์เชิงลำดับชั้นพบว่า เกณฑ์ที่พิจารณาคัดเลือกวัสดุ ตามลำดับความสำคัญมี 5 เกณฑ์ คือ ความทนทาน ต้นทุนในการก่อสร้างและบำรุงรักษา ระยะเวลาที่ใช้ในการก่อสร้าง ความยากง่ายในการทำงาน และความยากง่ายในการจัดหาวัสดุ และจากการสำรวจความคิดเห็นเชิงประสบการณ์จากผู้ทำงาน 50 ท่าน ในการเลือกใช้วัสดุที่เหมาะสมตามเกณฑ์ เพื่อวิเคราะห์ด้วยวิธีการรวมแบบถ่วงน้ำหนักอย่างง่ายพบว่า วัสดุที่เหมาะสมต่อการนำไปใช้ใน 3 ลำดับแรก คือ มารีนคอนกรีต รองลงมาคือ คอนกรีตประเภทที่ 5 ทนซัลเฟตสูง และคอนกรีตผสมกันซึม

Sulphate and Chloride concentrations in seawater have a significant impact on corrosion of steelreinforced concrete substructures located in coastal environments. This research aims to find the criteria for selecting materials in a construction project using the Analytic Hierarchy Process (AHP). Finding out the appropriate construction materials was conducted through Simple Additive Weighting (SAW) based on the criteria. Rigorous literature review coupled with preliminary data collection from case studies were carried out in order to perform content analysis. Then, five experts possessing more than 10 years of coastal engineering experience were asked to do content validation and Analytic Hierarchy Process (AHP). Weight assessment through prioritizations exposed 5 criteria for selecting the construction materials, consisting of material durability, construction and maintenance costs, construction or installation time, project complexity, and challenges in material procurement. After that, 50 participants with experience in coastal engineering were asked to complete an experience survey to identify factors affecting the selection of appropriate construction materials. By using simple Additive Weighting (SAW), the 3 prioritized list of appropriate materials were identified as marine concrete, sulphate resistant concrete and waterproof concrete.


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DOI: 10.14416/j.kmutnb.2023.07.004

ISSN: 2985-2145