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In order to look into the causes of fire response and post-fire bearing capacity of the steel tubular columns protected with different materials, the fire test was conducted for a set of circular steel tubes protected with different materials such as gypsum fireproof panel, bamboo plywood and the ordinary lumber core plywood, and the steel tube without any protective material.
The test results show that gypsum fireproof panel has the best fire protection characteristics, the ordinary lumber core plywood and bamboo plywood can also retard rising of the surface temperature of the steel tubes during the initial 35min although they are combustible materials.
It is found that the post-fire bearing capacity of the steel tubes protected with different materials varies evidently, and the maximum value of response temperature has the greatest effect.
Table 1 Main properties of variety of materials Type Gypsum fireproof panel I Gypsum fireproof panel II Thick bamboo plywood Thin bamboo plywood The ordinary lumber core plywood thickness/mm 18.3 34.3 15.7 12.0 15.4 density/kg/m3 453.6 820.4 683.5 682.9 451.7 water ratio/% 7.1 6.9 4.7 4.9 6.2 Fire experiment.
Acknowledgments This work is supported by National Natural Science Foundation of China (Grant No.51078187), the Science and Technology Plan of Zhejiang Province (No.2008C23013) and NSF of Ningbo City ( No.2009A610138).

Materials diseases.
The unnatural materials degradation or the reduced materials quality are materials diseases in CFST arch bridge.
Figure6 is the photo of materials diseases in some bridge in Guangxi.
Figure 6 Materials diseases photo Environmental diseases.
Journal of Chongqing Jiaotong University (Natural Science).Vol.32,2013(sup.1),p.738-741,826.

Thus the treatment of troublesome materials like clays must considered by the soil stabilization.
Using sustainable techniques and materials will not only reduce the cost of construction but will also preserve the environment.
It is hoped that this research will enable people over the globe to appreciate the environment and conduct construction with sustainable materials.
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Materials and Methods Chemicals.
All the materials are used without further purification.
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Styrene-butadiene rubber (SBR) latex is widely used to modify cement-based materials.
Experiment Raw Materials.
Materials used include PII 52.5 Portland cement, Styrofan D623 SBR latex and pure water.
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This paper chronicles the inextricable link between materials and design.
These designs broke through the 10 OPR barrier, placing higher demands on materials and motivating the need for dedicated high temperature materials research.
Their slightly higher OPR of 35 demanded similar materials advances.
Another class of high temperature materials is the intermetallics.
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