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Both Plasticizing and Air-Entraining Effect on Cement-Based Material Porosity and Durability
Aigerim Tolegenova1, Gintautas Skripkiunas2, Lyudmyla Rishko3
1Department of Construction and Building Materials, Satbayev University, Satpaev str.22a, Almaty 050013, Kazakhstan.
Materials (Basel, Switzerland)
|July 9, 2022
Summary
This study reveals that combining plasticizing and air-entraining effects in concrete enhances workability, strength, and durability. Optimal concrete mixtures with entrained air show improved freezing-thawing resistance and reduced scaling.
Area of Science:
- Materials Science
- Civil Engineering
- Concrete Technology
Background:
- Concrete durability is significantly impacted by plasticizing and air-entraining admixtures.
- Understanding the complex interactions of polycarboxylate ether superplasticizer (PCE), air-entraining admixture (AIR), and anti-foaming agent (AF) is crucial.
Purpose of the Study:
- To analyze the combined effects of plasticizing and air-entraining agents on concrete properties.
- To investigate the influence of PCE, AIR, and AF on hardened cement mortar (HCM) porosity and freezing-thawing resistance.
- To evaluate a methodology for predicting freezing-thawing resistance in plasticized mortar.
Main Methods:
- Analysis of air content, workability, flexural and compressive strength.
- Investigation of hardened cement mortar (HCM) porosity.
- Evaluation of freezing-thawing resistance and prediction methodology.
Main Results:
- Entrained air content positively influences cement mortar consistency, stability, closed porosity, and concrete durability.
- The freezing-thawing factor (KF) can predict concrete resistance based on porosity.
- Combined plasticizing and air-entraining effects significantly increase concrete frost resistance and reduce scaling.
Conclusions:
- Optimizing the interplay between plasticizing and air-entraining admixtures is key to enhancing concrete performance.
- The study confirms the beneficial impact of entrained air on concrete durability and frost resistance.
- A predictive model for freezing-thawing resistance based on porosity parameters is validated.
Keywords:
air-contentair-entraining admixturecementfreeze-thawing resistanceplasticizingporositystrengthMore Related Videos
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