Paper details

Title:

Microbial Growth on Concrete-Like Materials Containing Indrustrial Wastes

Author(s):

Jämsén, M., Turunen, L., Honkanen, H.

Document(s):

Abstract:

New recycled construction materials are launched to the markets in the boost of the circular economy and recycling targets, but not necessarily their properties of biodeterioration or microbial growth ability are not necessarily yet known exactly. Because of that, one of the project objectives was to find out how microbes, and what kind of species, grow in the surfaces of the specific concrete-like materials test pieces made in the project. At the same time, it was investigated how the different raw materials used in concrete-like materials test pieces affect the ability of microbes to grow. In this study microbes grew on the surface of concrete or concrete-like material sample test pieces (30 x 30 x 10 mm) containing green liquor dregs, blast furnace slag or Portland cement in the suitable conditions during first one month on MEA, PCA and DG18 growth medium and one more month in very poor growth conditions without medium. Two different test methods were in use. Result of both tests was the observation that microbial growth is present in all samples, regardless of the composition of the test pieces. No significant differences between the materials obtained from the factories and the recipes appeared. Method differences appeared instead. The main moulds were identified those of the genera Penicillium, Fusarium, Paecilomyces, Alternaria, Trichoderma and Acremonium. Actinomyces spp. were also in present.

Keywords:

sustainability, CO₂ reduction, concrete, concrete-like material, green liquor dreg, microbial growth

Topic:

Sustainable Resources for Decarbonising the Economy

Subtopic:

Municipal and Industrial Wastes

Event:

29th European Biomass Conference and Exhibition

Session:

1CV.6.1

Pages:

242 - 248

ISBN:

978-88-89407-21-9

Paper DOI:

10.5071/29thEUBCE2021-1CV.6.1

Price:

FREE