| Title |
Alkali-activated slag repair mortar for old reinforced concrete structures based on ordinary portland cement |
| Authors |
Vaičiukynienė, Danutė ; Liudvinavičiūtė, Agnė ; Bistrickaitė, Rėda ; Boiko, Olha ; Vaičiukynas, Vilimantas |
| DOI |
10.3390/ma18102272 |
| Full Text |
|
| Is Part of |
Materials.. Basel : MDPI. 2025, vol. 18, iss. 10, art. no. 2272, p. 1-11.. ISSN 1996-1944 |
| Keywords [eng] |
OPC repair mortar ; alkali-activated slag repair mortar ; biomass bottom ash aggregate |
| Abstract [eng] |
In this study, alkali-activated mortars were prepared using two different types of fine aggregates: natural sand and biomass bottom ash. These mortars were used as a repair material for structures constructed using old reinforced concrete structures based on Ordinary Portland cement (OPC). Experimental studies have shown that the alkali-activated slag mortar with biomass bottom ash (BBA) from the bubbling fluid bed meets the repair mortar class R1 according to EN 1504-3. The suitability of such repair mortar is determined by the good adhesion properties of the alkali-activated slag binder to old OPC concrete. The adhesion after 28 days was 0.31 MPa and the samples broke off at the repair matrix. The AAC/BBA repair mortar had a compressive strength of 18.69 MPa, the shrinkage due to drying deformations consisted of 0.1903% after 28 days. Alkali-activated slag mortars are effective in repairing, renewing and rebuilding damaged OPC concrete structures. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2025 |
| CC license |
|
