Use of wastes derived from earthquakes for the production of concrete masonry partition wall blocks

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2011.04.010· OSTI ID:21578458

Zhao, Xiao ^[1]; Ling, Tung-Chai; Kou, Shi-Cong ^[1]; Qingyuan, Wang ^[2]; Poon, Chi-Sun ^[3]

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1. Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)
2. Faculty of Architecture, Civil Engineering and Environment Engineering and Mechanics, Sichuan University (China)
3. Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)

Highlights: > Solved the scientific and technological challenges impeding use of waste rubble derived from earthquake, by providing an alternative solution of recycling the waste in moulded concrete block products. > Significant requirements for optimum integration on the utilization of the waste aggregates in the production of concrete blocks are investigated. > A thorough understanding of the mechanical properties of concrete blocks made with waste derived from earthquake is reported. - Abstract: Utilization of construction and demolition (C and D) wastes as recycled aggregates in the production of concrete and concrete products have attracted much attention in recent years. However, the presence of large quantities of crushed clay brick in some the C and D waste streams (e.g. waste derived collapsed masonry buildings after an earthquake) renders the recycled aggregates unsuitable for high grade use. One possibility is to make use of the low grade recycled aggregates for concrete block production. In this paper, we report the results of a comprehensive study to assess the feasibility of using crushed clay brick as coarse and fine aggregates in concrete masonry block production. The effects of the content of crushed coarse and fine clay brick aggregates (CBA) on the mechanical properties of non-structural concrete block were quantified. From the experimental test results, it was observed that incorporating the crushed clay brick aggregates had a significant influence on the properties of blocks. The hardened density and drying shrinkage of the block specimens decreased with an increase in CBA content. The use of CBA increased the water absorption of block specimens. The results suggested that the amount of crushed clay brick to be used in concrete masonry blocks should be controlled at less than 25% (coarse aggregate) and within 50-75% for fine aggregates.

• OSTI ID: 21578458
• Journal Information: Waste Management, Vol. 31, Issue 8; Other Information: DOI: 10.1016/j.wasman.2011.04.010; PII: S0956-053X(11)00208-X; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BRICKS
CLAYS
CONCRETE BLOCKS
CONCRETES
CONSTRUCTION
DEMOLITION
DRYING
EARTHQUAKES
MECHANICAL PROPERTIES
RECYCLING
SHRINKAGE
WALLS
WASTES
WATER
BUILDING MATERIALS
HYDROGEN COMPOUNDS
MATERIALS
MINERALS
OXYGEN COMPOUNDS
SEISMIC EVENTS
SILICATE MINERALS