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(1 揚(yáng)州工業(yè)職業(yè)技術(shù)學(xué)院建筑工程學(xué)院, 揚(yáng)州 225127; 2 揚(yáng)州大學(xué)建筑科學(xué)與工程學(xué)院, 揚(yáng)州 225009)

摘要: 以經(jīng)防火涂料處理前后的重組竹為研究對(duì)象,測(cè)試重組竹在不同受火時(shí)間后的抗壓強(qiáng)度、抗剪強(qiáng)度、抗彎強(qiáng)度及殘余質(zhì)量. 以木材為比較對(duì)象,采用差示掃描量熱(DSC)和熱重-微分熱重(TG-DTG)方法分析重組竹、防火涂料及云杉-松木-冷杉(SPF)的熱流量和質(zhì)量隨溫度的變化過程. 結(jié)果表明:相比于未經(jīng)防火涂料處理的重組竹,經(jīng)防火涂料處理后的重組竹力學(xué)性能和質(zhì)量隨受火時(shí)間的延長(zhǎng)下降速率均明顯減小;重組竹的熱穩(wěn)定性優(yōu)于SPF;防火涂料在高溫下吸熱膨脹形成碳質(zhì)泡沫,具有較好的熱穩(wěn)定性,可以起到很好的防火作用.

關(guān)鍵詞: 重組竹; 受火試驗(yàn); 物理力學(xué)性能; 防火處理; 熱分析

中圖分類號(hào):TU366. 3 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)10-0026-05

DOI:10. 19701 / j. jzjg. 20221182

Study on property degradation of bamboo scrimber for structure after exposed to fire

HU Mengjie1, YANG Dingyi2, YU Junbao1,2

(1 College of Architectural Engineering, Yangzhou Polytechnic Institute, Yangzhou 225127, China;2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225009, China)

Abstract: Taking the bamboo scrimber before and after being treated with fireproof coating the compressive strength, shearstrength, flexural strength and residual mass of the bamboo scrimber were tested. Taking wood as the comparison object,differential scanning calorimetry ( DSC) and thermogravimetric differential thermogravimetric ( TG-DTG) methods wereused to analyze the variation of heat flux and mass of bamboo scrimber, fireproof coating and spruce-pine-fir ( SPF) withtemperature. The results show that decreasing rate of the mechanical properties and mass of the bamboo scrimber treatedwith fireproof coating decreases significantly with the extension of fire time, compared with those treated without fireproofcoating. Thermal stability of bamboo scrimber is better than that of SPF. Fireproof coating in high temperature endothermicexpansion to form carbon foam, with better thermal stability, can play a very good role in fire prevention.

Keywords:bamboo scrimber; fire test; physical and mechanical property; fire prevention treatment; thermal analysis

∗國(guó)家重點(diǎn)研發(fā)計(jì)劃(2018YFD1101002),江蘇省高等學(xué)校自然科學(xué)研究面上項(xiàng)目(20KJB560010),江蘇省住房和城鄉(xiāng)建設(shè)廳科技項(xiàng)目(2020ZD40),揚(yáng)州市科技計(jì)劃項(xiàng)目(YZ2021166),揚(yáng)州工業(yè)職業(yè)技術(shù)學(xué)院校級(jí)課題(2021xjzk012).

[引用本文] 呼夢(mèng)潔,楊鼎宜,俞君寶. 結(jié)構(gòu)用重組竹受火后性能退化研究[ J]. 建筑結(jié)構(gòu),2023,53(10):26-30.HU Mengjie,YANG Dingyi,YU Junbao. Study on property degradation of bamboo scrimber for structure after exposed to fire[J]. Building Structure,2023,53(10):26-30.

第一作者:呼夢(mèng)潔,碩士,講師,主要從事土木工程材料研究工作,Email:463824581@ qq. com.