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Self-cementing properties of crushed demolished concrete in unbound layers: results from triaxial tests and field tests
Swedish Natl Rd & Transport Res Inst, VTI, SE-58195 Linkoping, Sweden.
2001 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 21, no 3, 235-239 p.Article in journal (Refereed) Published
Abstract [en]

A 2-year study is underway to evaluate the expected growth in stiffness in layers of crushed concrete from demolished structures. This growth is said to be a result of self-cementing properties. The study consists of repeated load triaxial tests on manufactured specimens after different storing time together with falling weight deflectometer, FWD, measurements on test sections. Results so far show a clear increase with time in resilient modulus and in back-calculated layer modulus for all concrete materials. The increase is the largest in the first months and then diminishes. The field measurements show a more considerable growth in stiffness than the laboratory tests, with a doubled value two years after construction. Comparative investigations on natural aggregates, mostly crushed granite do not show any growth in stiffness, neither in the laboratory nor in the field. Consequences for the choice of design modulus are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.

Place, publisher, year, edition, pages
2001. Vol. 21, no 3, 235-239 p.
Keyword [en]
recycling, reuse, recycled aggregates, demolition waste, self-hardening, stiffness increase, strength, design modulus, resilient modulus, sub-base, base
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-49351OAI: oai:DiVA.org:liu-49351DiVA: diva2:270247
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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