The IUP Journal of Structural Engineering :
Strength and Durability Properties of Bacterial Concrete with Partial Replacement of GGBS: An Experimental Investigation

Article Details
Pub. Date : Apr, 2019
Product Name : The IUP Journal of Structural Engineering
Product Type : Article
Product Code : IJSE41904
Author Name : Vijay Vardai, Tejas Doshi and M B Patil
Availability : YES
Subject/Domain : Science and Technology
Download Format : PDF Format
No. of Pages : 10

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Abstract

The paper investigates the influence of bacteria on the strength and durability properties of normal and Ground Granulated Blast Furnace Slag (GGBS) concrete. Cement was replaced with 40% of GGBS by weight. Different cell concentrations of bacteria were used in making the concrete mixes. Tests were performed for compressive, split tensile, Rapid Chloride Penetration Test (RCPT) and sulphate attack (Suthar and Parikh, 2016). Compressive strength and split tensile strength of GGBS bacterial concrete were higher with reduction in chloride penetration and increase in strength after sulphate attack was observed with a concentration 105 cells/mL of bacteria (Sudarshan and Tejas, 2016). Pseudomonas putida improves the strength and durability of concrete through self-healing effect.


Description

Concrete is the most important material used widely in construction all around the world. It is very weak in tension and very strong in compression. Since, concrete is weak in tension, steel bars are embedded into the concrete to contour the tensile forces. The steel reinforcement bars are provided with suitable cover to avoid corrosion of the bars (Pappupreethi et al., 2017).

A novel technique is used to repair or make concrete cracks-free by microbiologically induced calcium carbonate (CaCO3) precipitation. Calcite precipitation will occur as a result of microbial activities. This technique improves the compressive strength and stiffness of concrete and leads to crack-free structures (Abhishek et al., 2016).


Keywords

Pseudomonas putida, Ground Granulated Blast Furnace Slag (GGBS), Self healing, Rapid Chloride Penetration Test (RCPT), Regression analysis

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