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Recycling waste brick from construction and demolition of buildings as pozzolanic materials.

Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA·2010

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Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research

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Study of fine sediments for making lightweight aggregate.

Meng-Feng Hung¹, Chao-Lung Hwang

¹Department of Civil Engineering, De-Lin Institute of Technology, Taipei, Taiwan. hungmf66@yahoo.com.tw

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA

|November 8, 2007

Summary

Recycling fine sediment from Shih-Men Reservoir can create lightweight aggregate. Optimal sintering at 1200-1300°C transforms clay into a suitable raw material for expanded lightweight aggregate.

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Area of Science:

Materials Science
Geotechnical Engineering
Environmental Engineering

Background:

Fine sediments from reservoirs pose disposal challenges.
Lightweight aggregates are valuable construction materials.
Recycling industrial byproducts conserves resources.

Purpose of the Study:

To investigate the feasibility of recycling Shih-Men Reservoir fine sediments.
To produce lightweight aggregate from these sediments.
To characterize the sediment and the resulting aggregate.

Main Methods:

Qualitative and quantitative analysis of fine sediment.
X-ray fluorescence (XRF) and X-ray diffraction (XRD) for chemical and mineralogical composition.
Scanning electron microscopy (SEM) for microstructural analysis.
Sintering tests at various temperatures.

Main Results:

The fine sediment is classified as low plastic clay, suitable for bloating.
Particle density decreases with increasing sintering temperature above 1200°C.
Phase transformation and vitrification occur during sintering.
Optimal sintering conditions identified for expanded lightweight aggregate production.

Conclusions:

Shih-Men Reservoir fine sediment is a viable raw material for lightweight aggregate.
Sintering between 1200-1300°C for 10-12 minutes is effective.
This recycling process offers an environmentally sound solution.