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Performance of Fly Ash Geopolymer Concrete Incorporating Bamboo Ash at Elevated Temperature

机译:粉煤灰掺竹灰的土聚合物混凝土的高温性能。

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摘要

This paper presents the experimental results on the behavior of fly ash geopolymer concrete incorporating bamboo ash on the desired temperature (200 °C to 800 °C). Different amounts of bamboo ash were investigated and fly ash geopolymer concrete was considered as the control sample. The geopolymer was synthesized with sodium hydroxide and sodium silicate solutions. Ultrasonic pulse velocity, weight loss, and residual compressive strength were determined, and all samples were tested with two different cooling approaches i.e., an air-cooling (AC) and water-cooling (WC) regime. Results from these tests show that with the addition of 5% bamboo ash in fly ash, geopolymer exhibited a 5 MPa (53%) and 5.65 MPa (66%) improvement in residual strength, as well as 940 m/s (76%) and 727 m/s (53%) greater ultrasonic pulse velocity in AC and WC, respectively, at 800 °C when compared with control samples. Thus, bamboo ash can be one of the alternatives to geopolymer concrete when it faces exposure to high temperatures.
机译:本文介绍了掺入竹灰的粉煤灰土聚合物混凝土在所需温度(200°C至800°C)下的性能实验结果。研究了不同量的竹灰,并将粉煤灰地质聚合物混凝土作为对照样品。用氢氧化钠和硅酸钠溶液合成了地质聚合物。测定超声波脉冲速度,重量损失和残余抗压强度,并用两种不同的冷却方法,即空冷(AC)和水冷(WC)方案对所有样品进行测试。这些测试的结果表明,在粉煤灰中添加5%的竹灰后,地质聚合物的残余强度分别提高了5 MPa(53%)和5.65 MPa(66%),并提高了940 m / s(76%)与对照样品相比,在800°C时AC和WC中的超声脉冲速度分别提高了727 m / s(53%)。因此,当竹灰面临高温时,它可以作为地聚合物的替代品之一。

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