本文關(guān)鍵詞： CFRC 電熱效應(yīng) 鋼渣微粉 電極 溫升　出處：《鄭州大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本課題屬鄭州市科技領(lǐng)軍人才項目:碳纖維智能混凝土性能研究及在結(jié)構(gòu)健康監(jiān)測中的應(yīng)用研究(131TLJRC674)。將短切碳纖維摻加到混凝土中,可使混凝土具有良好的導(dǎo)電性能。在外電場作用下,碳纖維混凝土(CFRC)可以產(chǎn)生電熱效應(yīng),用于室內(nèi)采暖和路面的融雪化冰。但碳纖維混凝土的制備成本高且施工過程中電極布置復(fù)雜等不利因素阻礙了其推廣使用。針對這兩方面的問題,本文通過摻加鋼渣微粉來減小碳纖維的摻量,以降低制備成本;通過改進電極的布置來簡化施工,以期推動碳纖維混凝土在工程中的應(yīng)用。本文的主要研究內(nèi)容如下:(1)研究不同摻量碳纖維與鋼渣微粉在混凝土中的耦合作用對混凝土電阻率的影響。試驗結(jié)果表明:對于相同的電阻率指標(biāo),摻加鋼渣微粉可以減小碳纖維混凝土中碳纖維的摻量,并且碳纖維體積率為0.58%、鋼渣微粉摻量為水泥質(zhì)量20%的碳纖維混凝土電阻率滿足融雪化冰的要求且穩(wěn)定性良好。(2)進行不同電極下鋼渣微粉改性碳纖維混凝土板的升溫對比試驗。試驗結(jié)果表明:鋼渣微粉改性碳纖維混凝土板中采用閉合圓環(huán)形電極的升溫速率較其它兩種快,并且板表面的溫度分布較均勻。(3)進行不同工況下鋼渣微粉改性碳纖維混凝土板的升溫試驗。研究烘干與水飽和狀態(tài)、隔熱與不隔熱狀態(tài)對混凝土板升溫速率的影響,以及在不同溫度下輸入功率與混凝土板的升溫速率之間的關(guān)系。試驗結(jié)果表明:烘干狀態(tài)和隔熱狀態(tài)下的混凝土板升溫速率較水飽和狀態(tài)和不隔熱狀態(tài)更快,在不同的溫度下通電2個小時過程中混凝土板表面的溫度與通電時間均呈線性關(guān)系。
[Abstract]:This subject belongs to the Zhengzhou Science and Technology leadership Project: research on the performance of carbon fiber intelligent concrete and its application in structural health monitoring. Add short cut carbon fiber to concrete, 131TLJRC674. Carbon fiber reinforced concrete (CFRC) can produce electrothermal effect under the action of external electric field. It is used for indoor heating and snow melting and ice melting on pavement. However, the high cost of carbon fiber concrete preparation and the complex electrode arrangement in the construction process hinder its popularization and use. In this paper, by adding steel slag powder to reduce the amount of carbon fiber, to reduce the cost of preparation, by improving the arrangement of electrodes to simplify the construction, In order to promote the application of carbon fiber reinforced concrete in engineering, the main contents of this paper are as follows: 1) to study the effect of coupling of carbon fiber and steel slag powder in concrete on the resistivity of concrete. Ming: for the same resistivity index, The addition of steel slag powder can reduce the amount of carbon fiber in carbon fiber concrete. And the resistivity of carbon fiber concrete with carbon fiber volume ratio of 0.58 and steel slag micro-powder of 20% cement mass meets the requirement of snow melting and ice melting and has good stability.) the steel slag micro-powder modified carbon fiber reinforced concrete slab with different electrodes is raised. The experimental results show that the heating rate of the closed ring electrode in carbon fiber reinforced concrete slab modified by steel slag powder is faster than that of the other two. And the temperature distribution on the surface of the slab is more uniform. The temperature rise test of carbon fiber reinforced concrete slab modified by steel slag powder under different working conditions is carried out. The effects of drying and water saturation state, heat insulation and non-heat insulation state on the temperature rise rate of concrete slab are studied. And the relationship between the input power and the heating rate of concrete slabs at different temperatures. The experimental results show that the heating rates of concrete slabs under the condition of drying and heat insulation are faster than those of saturated and uninsulated concrete slabs. The surface temperature of concrete slabs is linearly related to the time of electrification at different temperatures during two hours of electrification.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU528.572

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