TY - JOUR
T1 - Contribution of Lysinibacillus sphaericus to crack repairing and compressive strengthin durable concrete
AU - Morales, Y. S.Bautista
AU - Vásquez, M. A.Cerna
AU - Beltrán, G. Sierra
AU - Abanto, S. E.Soto
N1 - Publisher Copyright:
© 2023 Potificia Universidad Catolica de Chile. All rights reserved.
PY - 2023
Y1 - 2023
N2 - Concrete is a material of massive use due to its strength and durability. However, it presents post-concreting anomalies that cause damage to structures, partially or totally, interrupting their service and reducing their designed useful life. The corrective maintenance is an anthropogenic intervention, which demands the use of epoxy additives, resins, tools, equipment and techniques that represent unforeseen costs, labor risks and environmental impact. In response is an anthropogenic, CaCO3 precipitating bacteria into concrete by biomineralization. This article seeks to determine the influence of Lysinibacillus sphaericus on the Compressive strength and self-repair of concrete f'c=350kg/cm2, previously carrying out tests for aggregates and culture media. The preparation of ABC concrete (Bacterial additive for concrete) in doses of 0, 15, 20 and 25ml/m3 of mix, the design of standard concrete with an A/C ratio of 0.43. At 28 days of setting, it reached a Compressive strength of 105% for the standard concrete, and the best strength obtained was by incorporating 25ml/m3, improving by 16% compared to the standard concrete. After 14 days of curing, SEM images showed 69% self-repair of the cracks.
AB - Concrete is a material of massive use due to its strength and durability. However, it presents post-concreting anomalies that cause damage to structures, partially or totally, interrupting their service and reducing their designed useful life. The corrective maintenance is an anthropogenic intervention, which demands the use of epoxy additives, resins, tools, equipment and techniques that represent unforeseen costs, labor risks and environmental impact. In response is an anthropogenic, CaCO3 precipitating bacteria into concrete by biomineralization. This article seeks to determine the influence of Lysinibacillus sphaericus on the Compressive strength and self-repair of concrete f'c=350kg/cm2, previously carrying out tests for aggregates and culture media. The preparation of ABC concrete (Bacterial additive for concrete) in doses of 0, 15, 20 and 25ml/m3 of mix, the design of standard concrete with an A/C ratio of 0.43. At 28 days of setting, it reached a Compressive strength of 105% for the standard concrete, and the best strength obtained was by incorporating 25ml/m3, improving by 16% compared to the standard concrete. After 14 days of curing, SEM images showed 69% self-repair of the cracks.
KW - bacterial concrete
KW - bacterial culture
KW - calcite precipitation
KW - Concrete self-repair
KW - Lysinibacillus sphaericus
UR - http://www.scopus.com/inward/record.url?scp=85168538865&partnerID=8YFLogxK
U2 - 10.7764/RIC.00064.21
DO - 10.7764/RIC.00064.21
M3 - Article
AN - SCOPUS:85168538865
SN - 0716-2952
VL - 38
SP - 215
EP - 224
JO - Revista Ingenieria de Construccion
JF - Revista Ingenieria de Construccion
IS - 2
ER -