埋入水泥基基体中的生物骨料的粘结性能。

Bond Behavior of a Bio-Aggregate Embedded in Cement-Based Matrix.

作者信息

Ferreira Saulo Rocha, de Andrade Rodolfo Giacomim Mendes, de Andrade Gabriele Melo, de Araújo Olga Maria Oliveira, Lopes Ricardo Tadeu, Fairbairn Eduardo de Moraes Rego, Grabois Thiago Melo, Ukrainczyk Neven

机构信息

Civil Engineering Department, Federal University of Lavras, C.P.3037, Lavras 37200-900, MG, Brazil.

Civil Engineering and Buildings Department, Instituto Federal do Espírito Santo, Av. Vitória, 1729, Vitória 29040-780, ES, Brazil.

出版信息

Materials (Basel). 2022 Sep 5;15(17):6151. doi: 10.3390/ma15176151.

DOI:10.3390/ma15176151

PMID:36079532

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9457772/

Abstract

This paper investigates the bond behavior between a bio-aggregate and a cement-based matrix. The experimental evaluation comprised physical, chemical, image, and mechanical characterization of the bio-aggregate. The image analyses about the bio-aggregate's outer structure provided first insights to understand the particularities of this newly proposed bio-aggregate for use in cementitious materials. A mineral aggregate (granitic rock), largely used as coarse aggregate in the Brazilian civil construction industry, was used as reference. The bond behavior of both aggregates was evaluated via pull-out tests. The results indicated that both aggregates presented a similar linear elastic branch up to each respective peak loads. The peak load magnitude of the mineral aggregate indicated a better chemical adhesion when compared to the bio-aggregate's. The post-peak behavior, however, indicated a smoother softening branch for the bio-aggregate, corroborated by the microscopy image analyses. Although further investigation is required, the macaúba crushed endocarp was found to be a thriving bio-material to be used as bio-aggregate.

摘要

本文研究了生物骨料与水泥基基体之间的粘结性能。实验评估包括对生物骨料的物理、化学、图像和力学特性进行表征。对生物骨料外部结构的图像分析为理解这种新提出的用于胶凝材料的生物骨料的特性提供了初步见解。一种在巴西民用建筑行业大量用作粗骨料的矿物骨料（花岗岩）被用作参考。通过拔出试验评估了两种骨料的粘结性能。结果表明，两种骨料在各自的峰值荷载之前都呈现出相似的线性弹性阶段。与生物骨料相比，矿物骨料的峰值荷载表明其具有更好的化学粘结性。然而，峰值后行为表明生物骨料的软化阶段更为平缓，这一点得到了显微镜图像分析的证实。尽管还需要进一步研究，但发现马卡乌巴碎内果皮是一种有潜力用作生物骨料的生物材料。