Paruthi Sagar, Rahman Ibadur, Khan Afzal Husain, Sharma Neha, Alyaseen Ahmad
Department of Civil Engineering, DPG Institute of Technology and Management, Gurugram, India.
Civil and Architectural Engineering Department, College of Engineering and Computer Sciences, Jazan University, PO Box. 706, 45142, Jazan, Saudi Arabia.
Sci Rep. 2024 Dec 30;14(1):31572. doi: 10.1038/s41598-024-77801-z.
Geopolymer concrete (GPC) offers a sustainable alternative by eliminating the need for cement, thereby reducing carbon dioxide emissions. Using durable concrete helps prevent the corrosion of reinforcing bars and reduces spalling caused by chemical attacks. This study investigates the impact of adding 5, 10, and 15% silica fumes (SF) on the mechanical and durability properties of GPC cured at 60 °C for 24 h. In the research, concrete specimens were submerged continuously for 62 days in four different chemicals: 6% sodium sulfate, 6% sodium chloride, 2% sulfuric acid, and 2% hydrochloric acid. The study assessed the effects of chemical exposure on concrete properties by examining water absorption, sorptivity, and compressive strength loss in GPC specimens. Maximum compressive strength, split tensile strength, and flexural strength of about 48.35 MPa, 4.91 MPa, and 5.01 MPa are achieved after incorporation of 10% SF in GPC after 28 days of curing. Results indicated that GPC with a significant dosage of SF (10%) improves its mechanical and durability properties. The maximum rebound number and ultrasonic pulse velocity are achieved after 90 days of curing with a 10% dosage of SF. Moreover, an economic analysis was conducted to confirm the economic viability.
地质聚合物混凝土（GPC）通过无需水泥提供了一种可持续的替代方案，从而减少了二氧化碳排放。使用耐久性混凝土有助于防止钢筋腐蚀，并减少化学侵蚀引起的剥落。本研究调查了添加5%、10%和15%硅灰（SF）对在60°C下养护24小时的GPC的力学和耐久性性能的影响。在研究中，混凝土试件在四种不同化学物质中连续浸泡62天：6%硫酸钠、6%氯化钠、2%硫酸和2%盐酸。该研究通过检查GPC试件的吸水率、吸渗系数和抗压强度损失来评估化学暴露对混凝土性能的影响。养护28天后，在GPC中掺入10%的SF后，最大抗压强度、劈裂抗拉强度和抗弯强度分别达到约48.35MPa、4.91MPa和5.01MPa。结果表明，含有大量SF（10%）的GPC改善了其力学和耐久性性能。在使用10%剂量的SF养护90天后，达到了最大回弹值和超声脉冲速度。此外，还进行了经济分析以确认其经济可行性。
