Use of Fine-Ground Lava Sand as a Pozzolanic Additive in Aerial Lime-Based Mortars
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU146341" target="_blank" >RIV/00216305:26110/22:PU146341 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Use of Fine-Ground Lava Sand as a Pozzolanic Additive in Aerial Lime-Based Mortars
Original language description
Pozzolanic additives were historically used in the construction practice to ensure improved mechanical properties and durability of the predominantly aerial-lime based mortars for the highly-stressed applications such as bridges, piers etc. The paper addresses the use of fine-ground lava sand as pozzolanic additive in aerial lime-based mortars. The mortars with 10%, 20%, and 40% lime replaced by the ground lava sand are studied regarding their strength properties, microstructure, and durability to freezing-thawing cycles and salt crystallization. The incorporation of ground lava sand to the mortar mixture leads to increase in strength by up to 50% in later ages. The pozzolanic reaction of the ground lava sand and lime along with the decrease in amount of aerial lime and kneading water in the mixture results in more unimodal pore distribution with lower total porosity, thus also lower water intake under atmospheric pressure. This change in microstructure combined with increased strength leads to mortars with improved durability to both, salt crystallization and freeze-thaw cycles. The fine-ground lava sand is found to be a suitable additive for aerial lime-based mortars to enhance their performance in building practice or to prepare mortars imitating the feeble hydraulicity of limes used in the past in constructions nowadays considered built heritage.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA21-06582S" target="_blank" >GA21-06582S: Experimental and computational analysis of salt transport, accumulation, and crystallization in non-hydrophobized rendering mortars</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Book of Articles of 9th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management, REHABEND 2022
ISBN
978-84-09-42253-1
ISSN
—
e-ISSN
—
Number of pages
6
Pages from-to
1321-1326
Publisher name
UNIVERSITY OF CANTABRIA
Place of publication
SANTANDER (SPAIN)
Event location
Granada
Event date
Sep 13, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—