Performance of geopolymer composites made with feldspathic solid solutions: Micromechanics and microstructure
Performance of geopolymer composites made with feldspathic solid solutions: Micromechanics and microstructure
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DOI：
10.1016/j.cemconcomp.2021.104241
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发表时间：
2021-09
影响因子：
10.5
通讯作者：
E. Kamseu;A. Akono;A. Nana;Rodrigue C. Kaze;C. Leonelli
中科院分区：
文献类型：
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作者：
E. Kamseu;A. Akono;A. Nana;Rodrigue C. Kaze;C. Leonelli
本研究探讨了高性能的菱晶型固溶体基地质聚合物复合材料。结果表明，在碱性介质中具有不一致溶解的菱晶型固溶体产生不同量的N-A-S-H+聚唾液酸盐地质聚合物，这取决于原始固体前体的矿物性质。反过来，N-A-S-H和聚唾液酸盐地质聚合物两者的存在将累积孔体积减小到纳米尺寸，导致分别在26-36 MPa和86-100 MPa范围内的弯曲强度和压缩强度。在碱性介质中的有限溶解的菱铁矿粉末允许杨氏模量，硬度，和N-A-S-H +聚唾液酸盐地质聚合物之间的直接相关性。研究结果表明，当N-A-S-H和聚唾液酸盐地质聚合物的量足以覆盖固溶体的不一致的溶解颗粒，而没有过量的地质聚合物凝胶时，所开发的粘结强度在最终复合材料中表现出高的机械性能。结果证实了通过地质聚合岩石固溶体来再生尺寸石头的可能性。
This study investigates the high performance of feldspathic solid solution-based geopolymer composites. The results show that a feldspathic solid solution with incongruent dissolution in an alkaline medium produces a differential amount of N-A-S-H+ polysialate geopolymer, depending on the mineral nature of the raw solid precursor. In turn, the presence of both N-A-S-H and polysialate geopolymer reduced the cumulative pore volume to a nanometric size, leading to flexural and compressive strengths in the range of 26–36 MPa and 86–100 MPa, respectively. The limited dissolution in the alkaline medium of the feldspathic powders allowed for a direct correlation among the Young modulus, the hardness, and the N-A-S-H + polysialate geopolymer. The findings show that when the amount of N-A-S-H and polysialate geopolymer is sufficient to cover the incongruent dissolved grains of solid solutions with no excess of geopolymer gel, the bonding strength developed exhibits high mechanical performance in the final composite The results confirm the possibility of reproducing dimensioned stones by geopolymerizing the feldspathic solid solutions.