Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete
Bacterial concrete has emerged as a remedial measure for healing cracks in structures such as bridges, RCC buildings, RCC pipes, canal linings and pavements. Crack formation is an extremely common occurrence in concrete structures, and allows water and different chemicals to enter the concrete t...
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doaj-aa2ccfb0729141b1977e2888ef32755d2020-11-25T00:39:18ZengUniversitas IndonesiaInternational Journal of Technology2086-96142087-21002019-07-0110475376410.14716/ijtech.v10i4.22992299Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial ConcreteC. Venkata Siva Rama Prasad0T.V.S. Vara Lakshmi1Department of Civil Engineering, University College of Engineering & Technology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur Dist., Andhra Pradesh., India-522510Department of Civil Engineering, University College of Engineering & Technology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur Dist., Andhra Pradesh., India-522510Bacterial concrete has emerged as a remedial measure for healing cracks in structures such as bridges, RCC buildings, RCC pipes, canal linings and pavements. Crack formation is an extremely common occurrence in concrete structures, and allows water and different chemicals to enter the concrete through cracks, diminishing its strength. In addition, it has consequences on the reinforcement once it comes into contact with water, CO2 and other chemicals. The repair of cracks within concrete requires regular maintenance and special kinds of treatment, which can be very expensive. In bacterial concrete, particular types of microorganism can be extremely useful for refurbishing cracks in existing concrete structures. In this research, an experimental investigation was made to prevent cracks in concrete using Bacillus subtilis bacteria and calcium lactate. Bacillus subtilis bacteria with calcite lactate were used at varying percentages of 5%, 10% and 15% cement weight for M40 grade concrete. The fine aggregate used in all the mixes was crushed rock sand. A Cantabro loss test was conducted for all the mixes after 3, 7, 14 and 28 days of curing. An empirical relation between flexural and compressive strength is proposed in the form of ft = 0.66 ?fck for river sand mixes and ft = 0.89fck0.46for crushed rock sand. An empirical relation is also proposed between Cantabro loss and flexural strength for bacterial concrete.http://ijtech.eng.ui.ac.id/article/view/2299Bacillus subtilisBacterial concreteCantabro lossCompressive strengthFlexural strengthSplit tensile strength |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. Venkata Siva Rama Prasad T.V.S. Vara Lakshmi |
spellingShingle |
C. Venkata Siva Rama Prasad T.V.S. Vara Lakshmi Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete International Journal of Technology Bacillus subtilis Bacterial concrete Cantabro loss Compressive strength Flexural strength Split tensile strength |
author_facet |
C. Venkata Siva Rama Prasad T.V.S. Vara Lakshmi |
author_sort |
C. Venkata Siva Rama Prasad |
title |
Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete |
title_short |
Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete |
title_full |
Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete |
title_fullStr |
Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete |
title_full_unstemmed |
Effect of Crushed Sand and Bacillus Subtilis on the Cantabro Loss of Bacterial Concrete |
title_sort |
effect of crushed sand and bacillus subtilis on the cantabro loss of bacterial concrete |
publisher |
Universitas Indonesia |
series |
International Journal of Technology |
issn |
2086-9614 2087-2100 |
publishDate |
2019-07-01 |
description |
Bacterial concrete has emerged as a remedial
measure for healing cracks in structures such as bridges, RCC buildings, RCC
pipes, canal linings and pavements. Crack formation is an extremely common
occurrence in concrete structures, and allows water and different chemicals to
enter the concrete through cracks, diminishing its strength. In addition, it
has consequences on the reinforcement once it comes into contact with water, CO2
and other chemicals. The repair of cracks within concrete requires regular
maintenance and special kinds of treatment, which can be very expensive. In
bacterial concrete, particular types of microorganism can be extremely useful
for refurbishing cracks in existing concrete structures. In this research, an
experimental investigation was made to prevent cracks in concrete using Bacillus subtilis bacteria and calcium
lactate. Bacillus subtilis bacteria
with calcite lactate were used at varying percentages of 5%, 10% and 15% cement
weight for M40 grade concrete. The fine aggregate used in all the mixes was
crushed rock sand. A Cantabro loss test was conducted for all the mixes after
3, 7, 14 and 28 days of curing. An empirical relation between flexural and
compressive strength is proposed in the form of ft
= 0.66 ?fck for river sand mixes and ft
= 0.89fck0.46for crushed rock sand. An
empirical relation is also proposed between Cantabro loss and flexural strength
for bacterial concrete. |
topic |
Bacillus subtilis Bacterial concrete Cantabro loss Compressive strength Flexural strength Split tensile strength |
url |
http://ijtech.eng.ui.ac.id/article/view/2299 |
work_keys_str_mv |
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