Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydration, Compressive Strength and Durability of Eco-friendly Cement Mortars Containing Recycled Brick Powder and Metakaolin
https://orcid.org/https://orcid.org/0000-0002-0066-8823
https://orcid.org/https://orcid.org/0000-0002-4322-1618
https://orcid.org/https://orcid.org/0000-0002-1024-3749
https://orcid.org/https://orcid.org/0000-0002-6155-1063
https://orcid.org/https://orcid.org/0000-0001-8438-3130
https://orcid.org/https://orcid.org/0000-0002-2047-9931
https://orcid.org/https://orcid.org/0000-0002-1508-4636
Grinding brick waste into powder for use as a supplementary cementitious material has shown to be a promising recycling method for the reuse of construction and demolition waste. However, the strength and durability of concrete containing recycled brick powder (RBP) will significantly decrease due to the poor pozzolanic activity of RBP, limiting its wider applications. This study attempted to overcome these defects through metakaolin (MK) addition. The hydration, compressive strength, durability, and environmental impact of eco-friendly mortars containing RBP and MK were investigated. The results showed that MK promoted the early-stage hydration of cement, creating a suitable hydration environment for the hydration of RBP at a later age. As a result, the volume fractions of low-density calcium silicate hydrate (C-S-H) and high-density C-S-H increased according to the nanoindentation test results. In addition, the strength, chloride penetration resistance, and reinforcement bar corrosion resistance of the blended mortars obviously improved due to the synergistic effect of RBP and MK. Lastly, we achieved CO2 emissions that were 22.1–30.2% lower and energy consumption that was 21.4–27.0% lower by incorporating 20% RBP and 5–15% MK.
Hydration, Compressive Strength and Durability of Eco-friendly Cement Mortars Containing Recycled Brick Powder and Metakaolin
https://orcid.org/https://orcid.org/0000-0002-0066-8823
https://orcid.org/https://orcid.org/0000-0002-4322-1618
https://orcid.org/https://orcid.org/0000-0002-1024-3749
https://orcid.org/https://orcid.org/0000-0002-6155-1063
https://orcid.org/https://orcid.org/0000-0001-8438-3130
https://orcid.org/https://orcid.org/0000-0002-2047-9931
https://orcid.org/https://orcid.org/0000-0002-1508-4636
Grinding brick waste into powder for use as a supplementary cementitious material has shown to be a promising recycling method for the reuse of construction and demolition waste. However, the strength and durability of concrete containing recycled brick powder (RBP) will significantly decrease due to the poor pozzolanic activity of RBP, limiting its wider applications. This study attempted to overcome these defects through metakaolin (MK) addition. The hydration, compressive strength, durability, and environmental impact of eco-friendly mortars containing RBP and MK were investigated. The results showed that MK promoted the early-stage hydration of cement, creating a suitable hydration environment for the hydration of RBP at a later age. As a result, the volume fractions of low-density calcium silicate hydrate (C-S-H) and high-density C-S-H increased according to the nanoindentation test results. In addition, the strength, chloride penetration resistance, and reinforcement bar corrosion resistance of the blended mortars obviously improved due to the synergistic effect of RBP and MK. Lastly, we achieved CO2 emissions that were 22.1–30.2% lower and energy consumption that was 21.4–27.0% lower by incorporating 20% RBP and 5–15% MK.
Hydration, Compressive Strength and Durability of Eco-friendly Cement Mortars Containing Recycled Brick Powder and Metakaolin
https://orcid.org/https://orcid.org/0000-0002-0066-8823
https://orcid.org/https://orcid.org/0000-0002-4322-1618
https://orcid.org/https://orcid.org/0000-0002-1024-3749
https://orcid.org/https://orcid.org/0000-0002-6155-1063
https://orcid.org/https://orcid.org/0000-0001-8438-3130
https://orcid.org/https://orcid.org/0000-0002-2047-9931
https://orcid.org/https://orcid.org/0000-0002-1508-4636
Grinding brick waste into powder for use as a supplementary cementitious material has shown to be a promising recycling method for the reuse of construction and demolition waste. However, the strength and durability of concrete containing recycled brick powder (RBP) will significantly decrease due to the poor pozzolanic activity of RBP, limiting its wider applications. This study attempted to overcome these defects through metakaolin (MK) addition. The hydration, compressive strength, durability, and environmental impact of eco-friendly mortars containing RBP and MK were investigated. The results showed that MK promoted the early-stage hydration of cement, creating a suitable hydration environment for the hydration of RBP at a later age. As a result, the volume fractions of low-density calcium silicate hydrate (C-S-H) and high-density C-S-H increased according to the nanoindentation test results. In addition, the strength, chloride penetration resistance, and reinforcement bar corrosion resistance of the blended mortars obviously improved due to the synergistic effect of RBP and MK. Lastly, we achieved CO2 emissions that were 22.1–30.2% lower and energy consumption that was 21.4–27.0% lower by incorporating 20% RBP and 5–15% MK.
Hydration, Compressive Strength and Durability of Eco-friendly Cement Mortars Containing Recycled Brick Powder and Metakaolin
KSCE J Civ Eng
Wang, Hao (Autor:in) / Wang, Liang (Autor:in) / Qian, Xin (Autor:in) / Cao, Ke (Autor:in) / Xu, Ying (Autor:in) / Fang, Yi (Autor:in) / Cui, Liyun (Autor:in)
KSCE Journal of Civil Engineering ; 26 ; 4023-4037
01.09.2022
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| Taylor & Francis Verlag | 2025
Performance evaluation of cement mortars modified with metakaolin or ground brick
| British Library Online Contents | 2009
Performance evaluation of cement mortars modified with metakaolin or ground brick
| Online Contents | 2009
Performance evaluation of cement mortars modified with metakaolin or ground brick
| Online Contents | 2009