Change search
Link to record
Permanent link

Direct link
BETA
Publications (4 of 4) Show all publications
Sadagopan, M., Malaga, K. & Nagy, A. (2019). A modified pycnometer method to determine the water absorption of combined crushed concrete aggregate fractions. In: Gabrijel I, Grosse C, Skazlić M (Ed.), International Conference on Sustainable Materials, Systems and Structures (SMSS2019): Novel Methods for Characterization of Materials and Structures. Paper presented at International Conference on Sustainable Materials, Systems and Structures (SMSS2019), Rovin, March 20-22, 2019. (pp. 286-292).
Open this publication in new window or tab >>A modified pycnometer method to determine the water absorption of combined crushed concrete aggregate fractions
2019 (English)In: International Conference on Sustainable Materials, Systems and Structures (SMSS2019): Novel Methods for Characterization of Materials and Structures / [ed] Gabrijel I, Grosse C, Skazlić M, 2019, p. 286-292Conference paper, Published paper (Refereed)
Abstract [en]

Crushed Concrete Aggregates (CCA) as fine and coarse aggregates in new concrete helps achieve closed-loop recycling. Assessment of workability, mechanical properties and durability of concrete demands knowledge of the water absorbed by the CCA. The EN 1097-6standard method is difficult to execute due to the presence of entrapped air and CCAsedimentation while performing water absorption experiment for fine CCA. Additionally, the assessment of Saturated Surface Dry (SSD) state seems operator specific and nonreproducible;moreover, giving water absorption measurement only at 24 hours. However, findings from this paper show measurements at 15 minutes is influential for concrete workability. The modified pycnometer method analyses the water absorption of a combined fraction consisting of coarse and fine CCA as proportioned in a given concrete recipe. Furthermore, sedimentation and entrapped air are prevented by pre-soaking the CCA in a solution of distilled water and poly-carboxylate based superplasticizer before commencing the experiment. Ultimately, the combined fraction is drained to SSD condition by vacuum filtration, which is easy to handle by professional operators. In this way, the water absorption development is measured from starting point to 24 hours for the combined fraction to determine the appropriate water amount to saturate CCA during concrete mixing.

Keywords
crushed concrete aggregate, water absorption, pcynometer, SSD, sustainability
National Category
Architectural Engineering Building Technologies Other Civil Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-15948 (URN)978-2-35158-217-6 (ISBN)
Conference
International Conference on Sustainable Materials, Systems and Structures (SMSS2019), Rovin, March 20-22, 2019.
Projects
RE:Concrete
Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-04-12Bibliographically approved
Sadagopan, M., Nagy, A. & Malaga, K. (2017). RE:Concrete- Study on Concrete Recycling in Sweden. In: Marianne Tange Hasholt (Ed.), Nordic Concrete Research: Proceedings of XXIIIth Nordic Concrete Research Symposium Aalborg, Denmark 2017. Paper presented at XXIIIth Nordic Concrete Research Symposium, Aalborg Denmark, August 21–23, 2017.. Oslo
Open this publication in new window or tab >>RE:Concrete- Study on Concrete Recycling in Sweden
2017 (English)In: Nordic Concrete Research: Proceedings of XXIIIth Nordic Concrete Research Symposium Aalborg, Denmark 2017 / [ed] Marianne Tange Hasholt, Oslo, 2017Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
Oslo: , 2017
Series
Nordic Concrete Research, ISSN 0800-6377
Keywords
recycled concrete aggregates, structural concrete, sustainability, waste management
National Category
Civil Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13710 (URN)000425406000008 ()978-82-8208-056-9 (ISBN)
Conference
XXIIIth Nordic Concrete Research Symposium, Aalborg Denmark, August 21–23, 2017.
Projects
RE:Concrete
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-12-01Bibliographically approved
Sadagopan, M., Nagy, A. & Malaga, K. (2017). RE:Concrete- Study on Recycling of Concrete in Sweden. Nordic Concrete Research (56), 83-99
Open this publication in new window or tab >>RE:Concrete- Study on Recycling of Concrete in Sweden
2017 (English)In: Nordic Concrete Research, ISSN 0800-6377, no 56, p. 83-99Article in journal (Refereed) Published
Abstract [en]

Sweden’s concrete waste is recycled for use in low-utility purposes such as in the construction of sub-bases in roads but hardly as aggregates in new concrete. To analyse the potential for high-utility recycling, a literature study was conducted on the regulatory instruments, building standards, production and properties of recycled concrete aggregates and the recycled aggregate concrete for Sweden and European countries. Results urge statistics to quantify recycled concrete; regulations like source sorting of waste and selective demolition could potentially optimize recycled aggregate production. Also, the compressive strength of recycled concrete aggregate’s parent concrete influences the properties of the new concrete.

Place, publisher, year, edition, pages
Oslo: , 2017
Keywords
Recycled concrete aggregate, Structural concrete, Closed-loop recycling, Sustainability, Waste management
National Category
Other Civil Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13709 (URN)000425406000008 ()
Projects
RE:Concrete
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-12-01Bibliographically approved
Sadagopan, M. (2013). Life Cycle Assessment: Concrete Hollow Core Slab.
Open this publication in new window or tab >>Life Cycle Assessment: Concrete Hollow Core Slab
2013 (English)Report (Other (popular science, discussion, etc.))
Abstract [en]

A report about the environmental impacts involved in the use of recycled concrete waste as aggregates in new concrete. The environmental impacts were assessed based on a simple LCA using a prefabricated concrete producing company in Sweden as a case study. The results of the LCA revealed that major environmental impacts arised from the crushing and extraction processes as these were diesel fuel intensive. Comparatively, the use of recycled concrete as aggregates in new concrete saw a reduction in the environmental impacts as the need for extraction had reduced with the introduction of recycled aggregates. 

National Category
Environmental Engineering Civil Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13930 (URN)
Available from: 2018-04-03 Created: 2018-04-03 Last updated: 2018-04-03Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4804-382x

Search in DiVA

Show all publications