Effect of redispersible polymer powders on some properties of mortars with complex mineral additives
Objective. To identify patterns in changes in the properties of building mortars obtained from dry building mixtures (DBM) depending on the dosage of redispersible polymer powders (RPP), the composition of the complex mineral additive (CMA) and the duration of hardening in air-dry conditions. Method...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Dagestan State Technical University
2025-01-01
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| Series: | Вестник Дагестанского государственного технического университета: Технические науки |
| Subjects: | |
| Online Access: | https://vestnik.dgtu.ru/jour/article/view/1634 |
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| Summary: | Objective. To identify patterns in changes in the properties of building mortars obtained from dry building mixtures (DBM) depending on the dosage of redispersible polymer powders (RPP), the composition of the complex mineral additive (CMA) and the duration of hardening in air-dry conditions. Method. The studies were conducted in accordance with the regulatory documents: GOST 31356–2013 Dry building mixtures on a cement binder. Test methods. GOST R 58277-2018 Dry building mixtures on a cement binder. GOST 31108-2016 Test methods, general construction cements. Specifications. Result. The presence of RPP in the composition of DBM leads to an increase in the flexural strength when kept for up to 120 days in air-dry conditions and an increase in the adhesion strength to the base. The greatest adhesion strength is observed in compositions with fly ash. The introduction of RPP and the composition of the MKD have an insignificant effect on increasing the modulus of elasticity. A positive effect of RPP in increasing the flexural strength limit during prolonged hardening of the mortar in air-dry conditions was revealed. The effect of RPP on the rate of hardening of the mortar at an early age was noted. Conclusion. Replacing part of the natural mineral raw materials with technogenic waste and using RPP will increase the environmental and economic efficiency of the production of SSS and ensure the production of mortars with the required properties. |
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| ISSN: | 2073-6185 2542-095X |