Self-Healing Concrete Using Bacteria Calcification from Karst Cave Environment

Jurnal Kimia Terapan Indonesia Pub Date : 2019-06-27 DOI:10.14203/JKTI.V21I1.411

A. Nugroho, A. Sumarno, Luna Ngeljaratan, D. Zulfiana, N. P. R. A. Krishanti, Triastutil Triastutil, E. Widodo

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引用次数: 5

Abstract

Karst regions in Indonesia have the uniqueness of the landscape and biodiversity. The karst is formed by the dissolution of rocks and the precipitation of mineral. In the cave, there are ornaments of stalactite and stalagmite which are formed by the process of mineral precipitation. We have isolated, screened, and identified the soil bacterium from the cave environment (Lysinibacillus macroides). These bacteria are able to precipitate calcium carbonate and can be developed as a self-healing agent concrete. We investigated the proportions and the properties of mixtures concrete containing lightweight aggregate and volcanic ash impregnated with bacteria. A comparison study was made by concrete cylinders subjected to compressive strength tests with and without the bacteria. It found that the strength of concrete with bacteria decreased by less than 10.56% for 28 days of cured specimens. This study showed that the effects of bacteria on the strength of concrete are not considerable. However, these bacteria are effective to repair in the microcrack less than 0.3 mm

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溶洞环境中细菌钙化自愈混凝土

印度尼西亚喀斯特地区具有独特的景观和生物多样性。喀斯特是由岩石的溶蚀和矿物的沉淀形成的。洞内有矿物沉淀形成的钟乳石、石笋装饰物。我们从洞穴环境中分离、筛选和鉴定了土壤细菌(大型赖氨酸芽孢杆菌)。这些细菌能够沉淀碳酸钙，可以开发为混凝土的自愈剂。研究了轻骨料与细菌浸渍火山灰混合混凝土的比例和性能。对含菌和不含菌混凝土圆柱体抗压强度试验进行了对比研究。结果表明，在养护28 d时，含菌混凝土的强度下降幅度小于10.56%。本研究表明，细菌对混凝土强度的影响并不大。然而，这些细菌在小于0.3 mm的微裂纹中有效修复

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Jurnal Kimia Terapan Indonesia

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