Production of self-healing concrete with industrial waste

(16-12-2021) In her PhD, Puput Risdanareni investigated whether self-healing concrete can be produced with industrial waste.

"In my PhD, I successfully investigated the feasibility of transforming industrial by-products and abundant material such as fly ash, Lusi (Sidoarjo Volcanic Mud) and municipal solid waste incinerator bottom ash (MSWI BA) into alkali activated lightweight aggregate that later on was used as a bacterial protector in the production of self-healing concrete," says Puput Risdanareni.

The mortar containing fly ash-based lightweight aggregate (LWA) was found to provide similar properties to the ones containing the commercial expanded clay LWA.

The durability performance of mortar containing fly ash-based LWA was also comparable to the mortar containing commercial LWA. The resulting mortar also provided excellent autogenous crack healing. The fly ash-based lightweight aggregate provided sufficient protection for the vegetative cells of the Bacillus sphaericus to heal cracks formed at later age.

"Although the healing performance provided by the fly ash-based lightweight aggregate was not as excellent as that of commercial lightweight aggregate variants, these findings may pave the way for further improvements in terms of using waste material as a bacterial carrier in the production of self-healing concrete," Puput concludes.

Read the entire PhD

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PhD Title: Alkali Activated Lightweight Aggregate as Bacterial Protector in Manufacturing Self-Healing Concrete

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Contact: Puput Risdanareni, Nele De Belie 

Puput Risdanareni

Puput Risdanareni was born in Malang 1st February 1986. She holds a master degree in Civil Engineering obtained in 2009 from Sepuluh Nopember Institute of Technology (ITS), Surabaya, Indonesia.

She started working on her PhD in Civil Engineering at Ghent University in September 2017. During her PhD, she performed experiments at Magnel-Vandepitte Laboratory for Structural Engineering and Building Material and Center for Microbial Ecology and Technology (CMET) to investigate the feasibility of utilizing alkali activated lightweight as a bacterial protector in the production of self-healing concrete.

As an output of her research, three papers were successfully published in a reputable journal. During her PhD, she guided one master student investigating the effect of bio-agent in the properties of self-healing concrete. She also assisted in the Life Cycle Analysis for Materials and Structure course.

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Editor: Jeroen Ongenae – Final editing: Ilse Vercruysse - Illustrator: Roger Van Hecke