School of Civil & Environmental Engineering, Urban Design and Study, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea.
School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea.
J Nanosci Nanotechnol. 2020 Jan 1;20(1):647-652. doi: 10.1166/jnn.2020.17287.
Abnormal climate changes have occurred all over the world due to greenhouse gases (GHGs). Various countries are targeting emission reductions of GHGs in 2020 and trying to GHGs those in multiple fields. Cement-based structures account for a large part in the construction industry. One ton of carbon dioxide is produced during the manufacturing process for a ton of cement. Therefore, decreasing cement usage is essential for carbon dioxide reduction. However, strength characteristics of cement are necessary conditions to meet the required strength of a structure. Therefore, it is necessary to develop cement substitutes and economic additives. In this study, we proposed an eco-friendly blend ratio by comparing the compressive strength of Ordinary Portland Cement (OPC) mortar and two variations. One was a mortar with a small amount of APTMS-sGO added. The other was a mortar mixed with HNBW (hydrogen nano-bubble water) as an enhanced material instead of ordinary water. The mortar added with 0.1% of APTMS-sGO showed improved early strength compared with OPC mortar. Its strength was enhanced 31.1% by using HNBW as functional water. Strength was improved 20.4% for cement mortar added with Graphene Oxide after reacting with SAM containing APTMS. When the texture of both mortars became denser, early compressive strength at 7 days each was 20.4-31.1% higher than that of OPC mortar. Finally, the strength was increased by 10.2% at 28 days.
由于温室气体 (GHGs) 的存在，世界各地都发生了异常的气候变化。各国的目标是在 2020 年减少温室气体排放，并试图在多个领域减少温室气体排放。水泥基结构在建筑行业中占有很大的比重。生产一吨水泥会产生一吨二氧化碳。因此，减少水泥用量对于减少二氧化碳排放至关重要。然而，水泥的强度特性是满足结构所需强度的必要条件。因此，有必要开发水泥替代品和经济添加剂。在这项研究中，我们通过比较普通波特兰水泥 (OPC) 砂浆和两种变化的抗压强度，提出了一种环保的混合比例。一种是加入少量 APTMS-sGO 的砂浆，另一种是用 HNBW（氢纳米气泡水）作为增强材料代替普通水混合的砂浆。与 OPC 砂浆相比，添加 0.1%的 APTMS-sGO 的砂浆显示出早期强度的提高。用 HNBW 作为功能水，其强度提高了 31.1%。与含有 APTMS 的 SAM 反应后，添加氧化石墨烯的水泥砂浆的强度提高了 20.4%。当两种砂浆的质地变得更加密实时，7 天的早期抗压强度比 OPC 砂浆分别提高了 20.4-31.1%。最后，28 天的强度提高了 10.2%。
