Microstructure of renovation plasters and their resistance to salt

Brachaczek, Wacław

doi:10.1016/j.conbuildmat.2018.06.068

Cited by 19 publications

(7 citation statements)

References 15 publications

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“…The durability of plasters is closely related to their resistance to water, freezing, and water-soluble salts, as salt crystallization is one of the most common causes of damage to inbuilt materials in historical and heritage buildings. The cyclic crystallization and dissolution of salts occurs in the pores; therefore, the high porosity of mortars positively affects their ability to absorb pressures linked with salt crystal growth [24][25][26]. However, it is not only overall porosity that has an important role in the susceptibility of mortars to salt decay, but also pore size distribution [25].…”

Section: Introductionmentioning

confidence: 99%

“…The cyclic crystallization and dissolution of salts occurs in the pores; therefore, the high porosity of mortars positively affects their ability to absorb pressures linked with salt crystal growth [24][25][26]. However, it is not only overall porosity that has an important role in the susceptibility of mortars to salt decay, but also pore size distribution [25].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aggregate and Binder Type on the Functional and Durability Parameters of Lightweight Repair Mortars

et al. 2021

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The subject matter of the work presented here is the development and evaluation of novel lightweight mortars that meet the functional and technical criteria imposed on repair mortars. In a broad experimental campaign, lime, natural hydraulic lime, and lime–cement mortars were designed and tested. Lightweight aggregate, expanded perlite, granules from expanded glass and zeolite were used as full replacements for quartz sand. The hardened mortars were tested at the ages of 28 days and 90 days. The conducted tests and analyses were focused on the assessment of structural, mechanical, hygric and thermal parameters. The salt crystallization resistance and effect of salt presence on the hygroscopicity of the investigated mortars were also investigated. The use of lightweight aggregates in the composition of mortars resulted in their high porosity, low density, satisfactory mechanical parameters, improved water vapor transmission capability and water absorption. The mortars with expanded perlite and glass granulate were ranked among thermal insulation mortars of classes T1 and T2, respectively. The use of lightweight aggregates enabled the development of mortars with great durability in terms of salt action, which was almost independent of binder type. The ability to accommodate water vapor was increased by the effect, i.e., the use of lightweight aggregates and the presence of salt in mortars increased porous space. Taking into account the compatibility, functional, and technical criteria, lime- and natural hydraulic lime-based lightweight mortarswere classified as repair mortars, providing improved thermal performance. The lime–cement lightweight plasters can be recommended only for repair of building structures where cement and lime–cement materials were original applied.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Aggregate and Binder Type on the Functional and Durability Parameters of Lightweight Repair Mortars

et al. 2021

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“…It was found that the response of mortar blends differs depending on the mechanism and attack factor, choice of an appropriate methodology for determining durability, and it depends on various factors, such as binder content, aggregate ratio, and binder to sand ratio. The research on the impact of the porosity structure of renovation plasters on salt crystallization as well as on the durability of these plasters was investigated in the works [27,28]. The findings demonstrated that the type of pore size and pores distribution in renovation plasters significantly influenced the speed of their drying and the crystallization of salts, and thus their durability.…”

Section: Crystallization Pressurementioning

confidence: 99%

Analysis of the Degradation Process of Sand-Lime Plasters Under the Impact of Crystallization Pressure

Ślusarek

Słomka-Słupik

Bochen

2023

Architecture, Civil Engineering, Environment

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A masonry basement wall was heavily dampened due to the lack of waterproofing in the ground contact area. Internal sand-lime wall plaster samples were subjected to chemical, physical and strength tests. The main phases of the damaged plaster were quartz and calcite. A measuring method of the tensile strength of plasters was proposed. A polar-symmetric deformation problem of a thick-walled spherical tank, allowing for the estimation of circumferential stresses in the spherical model was used for the analysis. It was found that the same values of porosity correspond to identical values of circumferential stresses, regardless of the values of the radii of the analyzed model. Thus the purpose of the presented research was to demonstrate that the mentioned dependence applied in the adopted model may be useful for the analysis of problems involving the resistance of internal plaster structure to the expansion caused by crystallization pressure.

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“…Moreover, plaster plays an essential role in buildings primarily because it becomes the protection of the outer walls from the influence of weather conditions (Dylewski and Adamczyk, 2014). Its hardening process occurs from the chemical process called crystallization and resistance to this step for Brachaczek (2018) is one of the most critical factors determining the durability of the plaster, this resistance crumbles under the influence of humidity.…”

Section: Literature Reviewmentioning

confidence: 99%

Evaluation of the use of Polyurethane Residue Aggregated to the Plaster of Civil Construction

Oliveira¹,

Santos²,

Souza³

et al. 2019

American Journal of Engineering and Applied Sciences

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The study deals with the reuse of Polyurethane (PU) obtained from a kitchen sponge added to plaster for use in civil engineering. The kitchen sponge is an item widely used by the population in their daily lives, generating a significant accumulation of waste. Thus, from the analysis of the properties of the kitchen sponge, it was seeking possible reuse of the kitchen sponge using it as an aggregate in plaster. The objective is to evaluate the properties of the material and consequently the search for an alternative of reuse of the waste to reduce the impact of the waste on the environment from the disposal. The methodology is composed of the collection of kitchen sponges already used, the processing, its application as an aggregate to gypsum and water, the preparation of plates for the tests and the evaluation of the properties. In general, the mixture presents significant results, highlighting excellent impact resistance and maintaining characteristics of the plaster, such as its pick time and compressive strength.

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Microstructure of renovation plasters and their resistance to salt

Cited by 19 publications

References 15 publications

Effect of Aggregate and Binder Type on the Functional and Durability Parameters of Lightweight Repair Mortars

Effect of Aggregate and Binder Type on the Functional and Durability Parameters of Lightweight Repair Mortars

Analysis of the Degradation Process of Sand-Lime Plasters Under the Impact of Crystallization Pressure

Evaluation of the use of Polyurethane Residue Aggregated to the Plaster of Civil Construction

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