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偏高岭土基地质聚合物的面向应用的化学优化

Application-Oriented Chemical Optimization of a Metakaolin Based Geopolymer.

作者信息

Ferone Claudio, Colangelo Francesco, Roviello Giuseppina, Asprone Domenico, Menna Costantino, Balsamo Alberto, Prota Andrea, Cioffi Raffaele, Manfredi Gaetano

机构信息

Department of Technology, University of Naples "Parthenope", Centro Direzionale, Is. C4, Napoli 80143, Italy.

Department of Structures for Engineering and Architecture, University of Naples "Federico II", Naples 80125, Italy.

出版信息

Materials (Basel). 2013 May 10;6(5):1920-1939. doi: 10.3390/ma6051920.

DOI:10.3390/ma6051920
PMID:28809251
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5452525/
Abstract

In this study the development of a metakaolin based geopolymeric mortar to be used as bonding matrix for external strengthening of reinforced concrete beams is reported. Four geopolymer formulations have been obtained by varying the composition of the activating solution in terms of SiO₂/Na₂O ratio. The obtained samples have been characterized from a structural, microstructural and mechanical point of view. The differences in structure and microstructure have been correlated to the mechanical properties. A major issue of drying shrinkage has been encountered in the high Si/Al ratio samples. In the light of the characterization results, the optimal geopolymer composition was then applied to fasten steel fibers to reinforced concrete beams. The mechanical behavior of the strengthened reinforced beams was evaluated by four-points bending tests, which were performed also on reinforced concrete beams as they are for comparison. The preliminary results of the bending tests point out an excellent behavior of the geopolymeric mixture tested, with the failure load of the reinforced beams roughly twice that of the control beam.

摘要

本研究报告了一种基于偏高岭土的地质聚合物砂浆的开发情况，该砂浆将用作钢筋混凝土梁外部加固的粘结基体。通过改变活化溶液中SiO₂/Na₂O比的组成，获得了四种地质聚合物配方。从结构、微观结构和力学角度对所得样品进行了表征。结构和微观结构的差异与力学性能相关。在高Si/Al比的样品中遇到了干燥收缩的主要问题。根据表征结果，然后将最佳地质聚合物组合物应用于将钢纤维固定到钢筋混凝土梁上。通过四点弯曲试验评估了加固钢筋梁的力学性能，同时也对钢筋混凝土梁进行了四点弯曲试验以作比较。弯曲试验的初步结果表明，所测试的地质聚合物混合物具有优异的性能，加固梁的破坏荷载约为对照梁的两倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/57c7991f0f2a/materials-06-01920-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/4c1515d2a940/materials-06-01920-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/5124721ecc5a/materials-06-01920-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/4b9d7828f5ea/materials-06-01920-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/fcf2ef77514d/materials-06-01920-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/5d674953842b/materials-06-01920-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/407add34d27f/materials-06-01920-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/0fbe83686676/materials-06-01920-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/8e38238d322a/materials-06-01920-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/69c471d127ee/materials-06-01920-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/75b5699cc63c/materials-06-01920-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/57c7991f0f2a/materials-06-01920-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/4c1515d2a940/materials-06-01920-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/5124721ecc5a/materials-06-01920-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/4b9d7828f5ea/materials-06-01920-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/fcf2ef77514d/materials-06-01920-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/5d674953842b/materials-06-01920-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/407add34d27f/materials-06-01920-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/0fbe83686676/materials-06-01920-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/8e38238d322a/materials-06-01920-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/69c471d127ee/materials-06-01920-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/75b5699cc63c/materials-06-01920-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9194/5452525/57c7991f0f2a/materials-06-01920-g011.jpg

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