| Summary: | 碩士 === 國立臺北科技大學 === 土木與防災研究所 === 102 === Studies have shown that geopolymer with good high temperature resistance. Wood is good construction materials, but it also affected by the fire, and caused damage to it''s structure. In the study, the wood be coated with 2cm thick of geopolymer, hope to achieve the purpose of fire-proof timber, by using the fire- resistanct and heat insulation properties of geopolymer . During the experiment, discovered that geopolymer would easy cracked by shrinking volume, it impacted usability and fire-resistant properties, so try extend form removal time, curing, and setting configuration of glass fiber web three ways to improve, expect to inhibit cracks or decrease the width of cracks. Experiment results shows that it decrease the chances of occurring cracks and reduces the width of cracks significantly indeed.
In 273 degrees fire resistance testing, there is no carbonization zone formed on specimens during 90 and 120 minutes periods, so geopolymer coated around the wood can isolate heat in effect, reached the purpose of protecting wood. In 573 degrees fire resistance testing, 90 minutes experiment caused maximum carbonization depth 14mm in square specimen. L shape specimen maximum carbonization reached depth 6.5mm. Cylinder specimen attained maximum carbonization depth 13.6mm. These confirmed that 2cm thick geopolymer used in upgrading wood refractory performance has significant function, and can also extend the rescue time, makes large areas of non-timber post and timber beam frames construction to keep strength they should have, in order to increase effective sectional area, avoid being burned for a short time. So geopolymer using in fire resistance of Wood truly reached to a considerable effect, and it''s worth to keep researching in the future.
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