Details
| Original language | English |
|---|---|
| Title of host publication | Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete |
| Subtitle of host publication | People and Practice |
| Publisher | Thomas Telford Services Ltd. |
| Pages | 547-556 |
| Number of pages | 10 |
| ISBN (print) | 0727732463, 9780727732460 |
| Publication status | Published - 2003 |
| Event | Role of Cement Science in Sustainable Development - International Symposium Celebrating Concrete: People and Practice - Dundee, United Kingdom (UK) Duration: 3 Sept 2003 → 4 Sept 2003 |
Publication series
| Name | Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete: People and Practice |
|---|
Abstract
Until now there have been two ways to produce structural lightweight concrete: concrete with porous aggregates (mostly used lightweight concrete nowadays) and concrete with porous matrix (with very different levels of porosity used for several applications). The strength of concrete with porous components depends on the lowest component-strength, and due to different effects in the transition zone between matrix and aggregates the strength is often even lower. In order to optimise the ratio of weight and strength it is possible to combine porous matrix and porous aggregates. For best results it is important to coordinate matrix strength and aggregate strength to make the material homogeneous and to avoid peaks in the internal stress distribution. Therefore it is necessary to find a method to specify the optimum matrix attributes and to find a way to produce such a matrix unerringly. Here the use of foamed concrete seems to be most efficient. By applying foam it is possible to modify the matrix properties in such a way as to minimize negative influences on fresh and hardened concrete, such as the floating of aggregates, shrinking, etc.
Keywords
- Air voids, Air-entraining admixture, Foam, Porosity, Structural lightweight concrete
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
Cite this
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Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete: People and Practice. Thomas Telford Services Ltd., 2003. p. 547-556 (Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete: People and Practice).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Structural lightweight concrete with combined grain and matrix porosity
AU - Lohaus, L.
AU - Pott, J. U.
PY - 2003
Y1 - 2003
N2 - Until now there have been two ways to produce structural lightweight concrete: concrete with porous aggregates (mostly used lightweight concrete nowadays) and concrete with porous matrix (with very different levels of porosity used for several applications). The strength of concrete with porous components depends on the lowest component-strength, and due to different effects in the transition zone between matrix and aggregates the strength is often even lower. In order to optimise the ratio of weight and strength it is possible to combine porous matrix and porous aggregates. For best results it is important to coordinate matrix strength and aggregate strength to make the material homogeneous and to avoid peaks in the internal stress distribution. Therefore it is necessary to find a method to specify the optimum matrix attributes and to find a way to produce such a matrix unerringly. Here the use of foamed concrete seems to be most efficient. By applying foam it is possible to modify the matrix properties in such a way as to minimize negative influences on fresh and hardened concrete, such as the floating of aggregates, shrinking, etc.
AB - Until now there have been two ways to produce structural lightweight concrete: concrete with porous aggregates (mostly used lightweight concrete nowadays) and concrete with porous matrix (with very different levels of porosity used for several applications). The strength of concrete with porous components depends on the lowest component-strength, and due to different effects in the transition zone between matrix and aggregates the strength is often even lower. In order to optimise the ratio of weight and strength it is possible to combine porous matrix and porous aggregates. For best results it is important to coordinate matrix strength and aggregate strength to make the material homogeneous and to avoid peaks in the internal stress distribution. Therefore it is necessary to find a method to specify the optimum matrix attributes and to find a way to produce such a matrix unerringly. Here the use of foamed concrete seems to be most efficient. By applying foam it is possible to modify the matrix properties in such a way as to minimize negative influences on fresh and hardened concrete, such as the floating of aggregates, shrinking, etc.
KW - Air voids
KW - Air-entraining admixture
KW - Foam
KW - Porosity
KW - Structural lightweight concrete
UR - http://www.scopus.com/inward/record.url?scp=33644665013&partnerID=8YFLogxK
U2 - 10.1680/rocisd.32477.0053
DO - 10.1680/rocisd.32477.0053
M3 - Conference contribution
AN - SCOPUS:33644665013
SN - 0727732463
SN - 9780727732460
T3 - Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete: People and Practice
SP - 547
EP - 556
BT - Role of Cement Science in Sustainable Development - Proceedings of the International Symposium - Celebrating Concrete
PB - Thomas Telford Services Ltd.
T2 - Role of Cement Science in Sustainable Development - International Symposium Celebrating Concrete: People and Practice
Y2 - 3 September 2003 through 4 September 2003
ER -