PROPERTIES AND BEHAVIOUR OF LIME- RICE HUSK ASH CEMENTS

The utilization of agricultural residues for building is particularly attractive in developing countries where indigenous resources for building are hard pressed to cope with the demand. The use of rice husks, essentially a waste material in most countries, as a source for a pozzolanic material, is described. The behaviour of lime- rice husk ash mixes, in terms of strength, shrinkage, durability and microstructure, are examined. It is shown that although maximum strengths are achieved with low lime mixes, the effects of lime leaching could seriously impair the durability and indeed the long term strength of these mixes. Accordingly, it is proposed that the optimum ratio of lime: rice husk ash should be about 1:1. Further, it is shown that within the limits of carbon contents likely to be encountered in the field, strength development is unaffected, though some retardation in initial and final set may occur. Finally, as would be expected, examination of the microstructure indicates an incoherent matrix of poorly crystallized calcium hydroxide, ash fragments and an ill defined calcium silicate hydrate structure. X- ray diffraction analysis indicates that the latter is of the csh(i) type. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/858411776
• Corporate Authors:

  University of New South Wales

  School of Civil Engineering, Anzac Parade
  Kensington, New South Wales  Australia  2033
• Authors:
  • COOK, D J
  • Suwanvitaya, P
• Publication Date: 1982-11

Media Info

• Features: Figures; Tables;
• Pagination: 20 p.
• Serial:
  • Issue Number: R208

Subject/Index Terms

• TRT Terms: Agriculture; Behavior; Biomass; Calcium hydroxide; Calcium oxide; Carbon; Cement; Developing countries; Durability; Hydrates; Hydration; Leaching; Microstructure; Pozzolan; Properties of materials; Shrinkage; Silicates; Strength of materials; Waste products (Materials)
• Uncontrolled Terms: Content
• Old TRIS Terms: Ashes
• ITRD Terms: 347: Agriculture; 9001: Behaviour; 4563: By product; 7158: Carbon; 4758: Cement; 150: Developing countries; 5910: Durability; 7195: Hydration; 5276: Leaching; 4574: Lime; 4185: Pozzolan; 5925: Properties; 4743: Shrinkage; 7303: Silicate; 5544: Strength (mater)
• Subject Areas: Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00381047
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 85841 177 6
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Apr 30 1984 12:00AM