Engineering properties of ancient masonry materials in Thailand and substitution materials for historical structures preservation

This paper presents the engineering properties of ancient masonry materials and substitution materials for the preservation of Thai historical structures. The study was divided into 2 parts. For the first part, the ancient masonry materials including brick and mortar were collected from various hist...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2020-03, Vol.463 (1), p.12077
Main Authors: Mahasuwanchai, Peerasit, Wonganan, Natthanan, Athisakul, Chainarong, Tangchirapat, Weerachart, Sahamitmongkol, Raktipong, Leelataviwat, Sutat
Format: Article
Language:English
Subjects:
Chemical composition
Compressive strength
Construction materials
Engineering
Fly ash
Historic buildings & sites
Historic sites
Historical structures
History of engineering
Lime
Masonry
Masonry materials
Porosity
Pozzolans
Preservation
Repair
Slaked lime
Substitutes
Water absorption
Weight
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Summary:This paper presents the engineering properties of ancient masonry materials and substitution materials for the preservation of Thai historical structures. The study was divided into 2 parts. For the first part, the ancient masonry materials including brick and mortar were collected from various historical sites in Bangkok and Ayutthaya provinces. The engineering properties of masonry materials were evaluated in laboratory such as compressive strength, density, chemical compositions, porosity, and water absorption. The second part was investigation to find the suitable substitution materials for historical repair mortars. Fly ash was used as a pozzolanic materials to partial replace slaked lime for making historical repair mortar. The engineering properties of historical repair mortar containing were also evaluated and compared with the ancient masonry materials obtained from the first part. The binder to sand ratio was controlled at 1:3 by weight. The slaked lime was substituted by fly ash in the ranges of 10-30% by weight. The experimental results showed that the use fly ash to a partial replace slaked lime could decrease the setting time of historical repair mortar. The compressive strength of historical repair mortars with fly ash were ranged from 1.54-2.22 MPa, depending on the level of replacement, while that of the ancient masonry materials had the compressive strength of 1.88-2.71 MPa.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/463/1/012077