- 王 凱1，劉勇健1,2，陳姍姍1
引用本文摘 要：以煅燒后粉煤灰為耐酸粉料，水玻璃為膠結料制作耐酸腐蝕砂漿。以不同濃度和種類的酸液模擬酸性介質環境進行酸性腐蝕試驗，參照GB 50212-2014中對于水玻璃混凝土的相關要求，通過檢測試塊抗壓強度及質量損失率確定試塊的耐酸性能。研究得到耐酸腐蝕性能較優的水玻璃砂漿配方，初步驗證了粉煤灰作為耐酸粉料制作水玻璃砂漿的可行性。以掃描電鏡觀察試塊經腐蝕處理后的內部結構，并通過XRD分析其構型，對粉煤灰中各成分與水玻璃所產生的反應進行了討論，得出了以粉煤灰為耐酸粉料的水玻璃砂漿的耐酸機理。 Abstract: The experiment used sodium silicate as the adhesive part of the new cement mortar according to its special principle of solidification. Different kinds and concentrations of acid were used to simulate the acidic condition, and a test on compressive strength and residual weight was used to identify the corrosion resistance of the sample according to GB 50212-2002. An orthogonal test showed that a formula with a best corrosion resistance which proved that using fly ash as acid-resisting powder in sodium silicate cement mortar was practicable. Scanning electron microscope was used to observe the cross profile of the sample, combined with a powder X-ray diffraction (XRD) to analyse its internal structure changes. The statistics showed that fly ash was mainly made up of mullite, which contains Al-O bonds and Si-O bonds, and some metal oxides combined with them, Si-O bonds from sodium silicate made them more stable, their combination improved the concrete’s compressive strength.