Influence of pozzolans on plant oil‐sulfur polymer cements: More sustainable and chemically‐resistant alternatives to Portland cement
Influence of pozzolans on plant oil‐sulfur polymer cements: More sustainable and chemically‐resistant alternatives to Portland cement
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DOI：
10.1002/app.53684
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发表时间：
2023-02
影响因子：
3
通讯作者：
M. J. Graham;Claudia V. Lopez;Charini Maladeniya;Andrew G. Tennyson;Rhett C. Smith
中科院分区：
文献类型：
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作者：
M. J. Graham;Claudia V. Lopez;Charini Maladeniya;Andrew G. Tennyson;Rhett C. Smith
低成本和高耐久性使波特兰水泥成为最广泛使用的建筑材料，但水泥生产的环境危害抵消了水泥生产的好处，水泥生产占人为CO2气体排放总量的8-10%。高含硫量材料（HSM）是一种替代品，可作为水泥发挥粘结作用，碳足迹更小，并可能具有上级化学、物理和机械性能。90重量%硫与10重量%芥花油或向日葵油的反硫化分别产生CanS或SunS。值得注意的是，与波特兰水泥的>1200 °C小时相比，将在≤180 °C的温度下制备的这些HSM与5重量%的粉煤灰（FA）、硅灰（SF）、研磨的粒状高炉矿渣（GGBFS）或偏高岭土（MK）组合，以分别得到复合材料CanS-FA、CanS-SF、CanS-GGBFS和CanS-MK。使用SunS的类似方案同样产生了SunS-FA、SunS-SF、SunS-GGBFS和SunS-MK。每种HSM都具有高压缩机械强度、低吸水率和优异的耐酸腐蚀性。所有的复合材料在暴露于酸性溶液（波特兰水泥发生溶解的条件）后还表现出上级抗压强度保持率。因此，本文报道的聚合物水泥-火山灰复合材料在某些应用中可以作为传统波特兰水泥的更环保的替代品。
Low cost and high durability have made Portland cement the most widely‐used building material, but benefits are offset by environmental harm of cement production contributing 8–10% of total anthropogenic CO2gas emissions. High sulfur‐content materials (HSMs) are an alternative that can perform the binding roles as cements with a smaller carbon footprint, and possibly superior chemical, physical, and mechanical properties. Inverse vulcanization of 90 wt% sulfur with 10 wt% canola oil or sunflower oil to yield CanS or SunS, respectively. Notably, these HSMs prepared at temperatures ≤180 °C compared to >1200 °C hours for Portland cement CanS was combined with 5 wt% fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBFS), or metakaolin (MK) to give composites CanS‐FA, CanS‐SF, CanS‐GGBFS, and CanS‐MK, respectively. The analogous protocol with SunS likewise yielded SunS‐FA, SunS‐SF, SunS‐GGBFS, and SunS‐MK. Each of these HSMs exhibit high compressive mechanical strength, low water uptake values, and exceptional resistance to acid‐induced corrosion. All of the composites also exhibit superior compressive strength retention after exposure to acidic solutions, conditions under which Portland cement undergoes dissolution. The polymer cement‐pozzolan composites reported herein may thus serve as greener alternatives to traditional Portland cement in some applications.