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When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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The workability of concrete is a critical characteristic that influences the ease of mixing, handling, and finishing the concrete. It is affected by several factors including water content, aggregate properties, and admixtures like air entrainment. Water plays a fundamental role as it lubricates the concrete mix, facilitating easier movement and placement. However, the water requirement varies depending on the texture and shape of aggregates. Finer particles and angular, rough-textured...
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Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
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Related Experiment Video

Updated: Dec 19, 2025

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Impression materials: does water affect the performance of alginates?

Gabriele Cervino1

  • 1Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, University of Messina, Messina, Italy - gcervino@unime.it.

Minerva Stomatologica
|June 4, 2020
PubMed
Summary

This review examines whether water properties influence alginate performance. Alginates are commonly used in dentistry and other industries, but water is not included in the product. The researchers propose that different water sources may lead to different material properties. They suggest that water hardness and pH may affect setting time and consistency. The authors suggest that manual mixing introduces variability, which automated devices may reduce. They propose that following manufacturer instructions is essential for reproducibility. The findings suggest that standardized water conditions may improve material performance. The authors suggest that further research is needed to clarify these effects.

Keywords:
Alginate propertiesDental mold materialsWater hardness effectsImpression material consistency

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Area of Science:

  • Dental materials science
  • Biopolymer applications in medicine
  • Clinical dentistry

Background:

Little is known about how water composition affects alginate performance. Alginate is a common mold material in dentistry, but its behavior can vary depending on mixing conditions. Prior research has shown that water is a critical component in the preparation of these materials. However, no prior work had resolved how water properties influence final product quality. The lack of standardized water conditions during mixing may lead to inconsistent outcomes. This gap motivated a review of existing literature to clarify the issue. No prior work had resolved the impact of water hardness or pH on alginate setting. That uncertainty drove the need to examine current evidence and identify best practices.

Purpose Of The Study:

This study aimed to determine whether water properties influence alginate performance. The focus was on how water composition affects material consistency and reproducibility. The motivation was to improve material reliability in clinical and industrial settings. The researchers propose that water variability could explain differences in alginate behavior. No prior work had resolved the extent of this influence. The study sought to synthesize available evidence from PubMed and Embase. The goal was to provide guidance for users to achieve consistent results. The researchers propose that standardized water conditions could enhance material performance.

Main Methods:

The researchers conducted a literature review using PubMed and Embase databases. They searched for articles discussing water effects on alginate properties. The review approach included screening abstracts and full texts for relevant data. No prior work had resolved the impact of water on alginate setting. The researchers propose that water hardness and pH are key variables to consider. The analysis focused on studies that reported measurable outcomes. The researchers propose that manual mixing introduces variability that automated devices can reduce. The review approach did not include experimental trials but focused on existing literature.

Main Results:

The findings suggest that water composition affects alginate setting and consistency. The researchers propose that different water sources can lead to different material properties. The strongest evidence indicates that water hardness influences gelation time. The researchers propose that pH levels may alter the final material's stability. The results suggest that manual mixing introduces variability in material performance. The researchers propose that automatic mixing devices can reduce this variability. The results suggest that following manufacturer instructions is essential for reproducibility. The researchers propose that standardized water conditions improve material consistency.

Conclusions:

The authors suggest that water properties may influence alginate performance. They propose that following manufacturer guidelines can enhance material consistency. The authors suggest that automated mixing devices may reduce variability. They propose that water hardness and pH are important factors to consider. The authors suggest that reproducibility is a key concern in clinical and industrial applications. They propose that standardized water conditions may improve material performance. The authors suggest that further research is needed to clarify these effects. They propose that users should be aware of water's potential impact on alginate behavior.

The researchers propose that water hardness and pH may influence alginate setting and consistency.

The authors suggest that automatic devices may reduce variability caused by manual mixing.

The authors propose that this ensures consistent material performance and reproducibility.

The researchers propose that water hardness may affect gelation time and material stability.

The authors suggest that existing studies provide limited and inconsistent information on water effects.

The authors suggest using standardized water conditions and automated mixing devices.