TY - GEN
T1 - Autogenous Healing Performance of Fly Ash-Based Alkali Activated Lightweight Aggregate in Mortar
AU - Risdanareni, Puput
AU - Wang, Jianyun
AU - De Belie, Nele
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
PY - 2025
Y1 - 2025
N2 - Cracks in concrete that could decrease the concrete element's life span need to be repaired. The autogenous healing mechanism, a feature provided by cementitious material due to continuous hydration and calcium carbonate precipitation, could be a solution to mitigate cracks in concrete elements. In this research, alkali-activated lightweight aggregate produced from fly ash (FA LWA) that could retain water in their pores to induce further hydration at a later age could become a promising material to provoke an autogenous healing mechanism. The mortar was mixed with FA LWA and expanded clay LWA (EC LWA) at a replacement rate of 30% by volume for fine aggregate. The outcomes demonstrate that the flowability of the fresh mortar was not considerably impacted by the addition of LWA. The compressive strength of mortar incorporating FA LWA was comparable to the mortar that contains EC LWA. The healing ratio of the reference sample, the sample incorporating FA LWA and EC LWA in the crack with the width range of 0.3–0.4 mm, was 33, 95, and 53%, respectively. In conclusion, FA LWA could successfully provoke the autogenous healing mechanism in mortar.
AB - Cracks in concrete that could decrease the concrete element's life span need to be repaired. The autogenous healing mechanism, a feature provided by cementitious material due to continuous hydration and calcium carbonate precipitation, could be a solution to mitigate cracks in concrete elements. In this research, alkali-activated lightweight aggregate produced from fly ash (FA LWA) that could retain water in their pores to induce further hydration at a later age could become a promising material to provoke an autogenous healing mechanism. The mortar was mixed with FA LWA and expanded clay LWA (EC LWA) at a replacement rate of 30% by volume for fine aggregate. The outcomes demonstrate that the flowability of the fresh mortar was not considerably impacted by the addition of LWA. The compressive strength of mortar incorporating FA LWA was comparable to the mortar that contains EC LWA. The healing ratio of the reference sample, the sample incorporating FA LWA and EC LWA in the crack with the width range of 0.3–0.4 mm, was 33, 95, and 53%, respectively. In conclusion, FA LWA could successfully provoke the autogenous healing mechanism in mortar.
KW - Alkali activated LWA
KW - Autogenous healing
KW - Fly ash
KW - Self-healing mortar
UR - https://www.scopus.com/pages/publications/105003101013
U2 - 10.1007/978-981-96-2143-9_19
DO - 10.1007/978-981-96-2143-9_19
M3 - 会议稿件
AN - SCOPUS:105003101013
SN - 9789819621422
T3 - Lecture Notes in Civil Engineering
SP - 175
EP - 180
BT - Proceedings of the 6th International Conference on Rehabilitation and Maintenance in Civil Engineering - ICRMCE 2024
A2 - Tsai, Keh-Chyuan
A2 - Shahin, Mohamed
A2 - Kristiawan, Stefanus A.
A2 - Sam, Abdul Rahman Mohd
A2 - Hai, Pham Dinh
PB - Springer Science and Business Media Deutschland GmbH
T2 - 6th International Conference on Rehabilitation and Maintenance in Civil Engineering, ICRMCE 2024
Y2 - 4 July 2024 through 5 July 2024
ER -