本文關鍵詞： 堿礦渣混凝土 溫度場 膨脹劑 數(shù)值模擬 脫粘　出處：《混凝土》2017年10期 　論文類型：期刊論文

【摘要】：以硫鋁酸鈣氧化鈣類膨脹劑作為摻合料,制作兩組鋼管堿礦渣混凝土試件,膨脹劑摻量分別為0、6%,開展鋼管密封條件下堿礦渣混凝土溫度場試驗研究,并在試驗的基礎上運用已有水化熱數(shù)值分析模型,采用ANSYS有限元分析軟件對堿礦渣混凝土在密封條件下的溫度場進行數(shù)值模擬分析,結(jié)果表明:密封條件下,堿礦渣混凝土溫度場分布呈現(xiàn)由內(nèi)向外降低的趨勢,膨脹劑的摻入使峰值溫度出現(xiàn)的時間提前,且提高了堿礦渣混凝土的核心區(qū)溫度。溫度場數(shù)值模擬結(jié)果與試驗結(jié)果相吻合,從數(shù)據(jù)分析結(jié)果來看,評價堿礦渣混凝土的水化熱應當采用指數(shù)型和雙曲線型模型,摻入膨脹劑后則應采用復合指數(shù)型模型進行評價。不摻膨脹劑的鋼管堿礦渣混凝土在界面區(qū)域因溫度梯度影響容易形成脫粘空隙。
[Abstract]:Using calcium sulphoaluminate oxide type expansion agent as admixture, two groups of test specimens of alkali slag concrete made of steel tube were made, and the amount of expansion agent was 0 ~ 6 respectively. The temperature field of alkali slag concrete under the condition of steel tube sealing was studied. On the basis of the experiment, using the existing hydration heat numerical analysis model and using ANSYS finite element analysis software to simulate the temperature field of the alkali slag concrete under the sealing condition, the results show that: under the sealing condition, The temperature field distribution of alkali slag concrete decreases from inside to outside, the time of peak temperature appears earlier with the addition of expansive agent, and the core temperature of alkali slag concrete is increased. The numerical simulation results of temperature field are in good agreement with the experimental results. From the results of data analysis, the hydration heat of alkali slag concrete should be evaluated by exponential and hyperbolic models. The composite exponential model should be used to evaluate the mixed expansive agent, and the debonding void is easy to be formed in the interface area because of the influence of temperature gradient on the alkali slag concrete of steel tube without expansion agent.
【作者單位】： 信陽師范學院建筑與木工程學院;重慶房地產(chǎn)職業(yè)學院;
【基金】：國家自然科學基金資助項目(U1504505) 河南省高等學校重點科研項目(16B560009)
【分類號】：TU528

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