A Chemical Approach to the Selection of Soils for the Reproduction of Earth-based Mortars for Conservation Purposes: Case Report from a Brazilian Historic Site

IF 2.3 3区工程技术 0 ARCHITECTURE

International Journal of Architectural Heritage Pub Date : 2023-12-02 DOI:10.1080/15583058.2022.2086504

Andrea Cavicchioli, Guillermo Rolón, Marianne Odlyha

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引用次数: 1

Abstract

ABSTRACT Earthen buildings frequently demand the use of protective renders and plasters that should be, in several aspects, compatible with the underlying structures. To this end, earth-based mortars have traditionally been used and are common in historic houses. Their periodic replacement or repair is inevitable and intrinsic with their naturally sacrificial role, but restorations are also expected to follow suitability criteria, as well as minimum performance standards. In this paper, an approach to the reproduction of wall-finishes close to the original formulations found on historic buildings is proposed and described using the case study of a historic site in Brazil. The problem was addressed using the elemental composition data of a set of original mortars and a bank of local soils that were treated by multivariate statistical analysis. The final restoration mortars, that were obtained also by adjusting their granulometric profile by means of the mixture of sand, exhibited satisfactory performance in terms of adhesive strength and water absorption, as well as of resistance to water erosion when stabilized with lime.

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为保护目的选择土基灰泥再生土壤的化学方法：巴西一处历史遗址的案例报告

土质建筑经常需要使用保护性渲染和抹灰，这些渲染和抹灰应该在几个方面与底层结构兼容。为此，传统上使用的是土质砂浆，在历史悠久的房屋中也很常见。由于其自然的牺牲作用，它们的定期更换或维修是不可避免的和内在的，但修复也应遵循适用性标准，以及最低性能标准。在本文中，提出了一种接近历史建筑原始配方的墙壁饰面再现方法，并使用巴西历史遗址的案例研究进行了描述。利用一组原始砂浆和一组当地土壤的元素组成数据进行多元统计分析，解决了这个问题。最终的修复砂浆，也是通过调整砂的混合粒度剖面得到的，在粘接强度和吸水率方面表现出令人满意的性能，以及石灰稳定后的抗水侵蚀性能。

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来源期刊

International Journal of Architectural Heritage 工程技术-工程：土木

CiteScore

7.20

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： International Journal of Architectural Heritage provides a multidisciplinary scientific overview of existing resources and modern technologies useful for the study and repair of historical buildings and other structures. The journal will include information on history, methodology, materials, survey, inspection, non-destructive testing, analysis, diagnosis, remedial measures, and strengthening techniques. Preservation of the architectural heritage is considered a fundamental issue in the life of modern societies. In addition to their historical interest, cultural heritage buildings are valuable because they contribute significantly to the economy by providing key attractions in a context where tourism and leisure are major industries in the 3rd millennium. The need of preserving historical constructions is thus not only a cultural requirement, but also an economical and developmental demand. The study of historical buildings and other structures must be undertaken from an approach based on the use of modern technologies and science. The final aim must be to select and adequately manage the possible technical means needed to attain the required understanding of the morphology and the structural behavior of the construction and to characterize its repair needs. Modern requirements for an intervention include reversibility, unobtrusiveness, minimum repair, and respect of the original construction, as well as the obvious functional and structural requirements. Restoration operations complying with these principles require a scientific, multidisciplinary approach that comprehends historical understanding, modern non-destructive inspection techniques, and advanced experimental and computer methods of analysis.