本文選題：粉煤灰混凝土　切入點(diǎn)：孔隙水飽和度　出處：《中國礦業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文進(jìn)行了孔隙水飽和度對粉煤灰混凝土力學(xué)性能影響規(guī)律的試驗(yàn)研究，得出了微環(huán)境相對濕度、溫度、粉煤灰摻量和水膠比對粉煤灰混凝土孔隙水飽和度的影響規(guī)律，探討了孔隙水飽和度對粉煤灰混凝土抗壓強(qiáng)度和彈性模量的影響，并進(jìn)行了孔隙水飽和度對無損檢測粉煤灰混凝土抗壓強(qiáng)度影響規(guī)律的試驗(yàn)研究，主要內(nèi)容如下： 進(jìn)行了不同水膠比和粉煤灰摻量混凝土在不同溫濕度條件下孔隙水飽和度的試驗(yàn)研究，分析了微環(huán)境相對濕度、溫度、粉煤灰摻量以及水膠比對孔隙水飽和度的影響規(guī)律。研究結(jié)果表明，，孔隙水飽和度分別隨微環(huán)境相對濕度的增大、溫度的降低和水膠比的減小而增大，當(dāng)粉煤灰摻量不超過15%時(shí)，孔隙水飽和度隨粉煤灰摻量的增加而增大，當(dāng)粉煤灰摻量超過15%時(shí)，孔隙水飽和度降低。最后分析了微環(huán)境相對濕度、溫度、粉煤灰摻量以及水膠比與混凝土孔隙水飽和度之間的相關(guān)性。 進(jìn)行了不同孔隙水飽和度的粉煤灰混凝土抗壓強(qiáng)度的試驗(yàn)研究，分析了孔隙水飽和度對粉煤灰混凝土抗壓強(qiáng)度的影響規(guī)律。研究結(jié)果表明，粉煤灰混凝土的抗壓強(qiáng)度隨孔隙水飽和度的增大而降低，當(dāng)孔隙水飽和度小于20%時(shí)，抗壓強(qiáng)度隨孔隙水飽和度的增大而緩慢降低，孔隙水飽和度從20%增加到60%時(shí)，抗壓強(qiáng)度迅速下降，孔隙水飽和度大于60%時(shí)，抗壓強(qiáng)度趨于穩(wěn)定。 進(jìn)行了不同孔隙水飽和度對粉煤灰混凝土回彈值和超聲聲速影響的試驗(yàn)研究，分析了孔隙水飽和度對無損檢測粉煤灰混凝土抗壓強(qiáng)度的影響規(guī)律。研究結(jié)果表明，平均回彈值隨孔隙水飽和度的增大而減小，超聲聲速隨孔隙水飽和度的增大而增大，最后建立了考慮孔隙水飽和度的粉煤灰混凝土的測強(qiáng)曲線。 進(jìn)行了不同孔隙水飽和度的粉煤灰混凝土彈性模量的試驗(yàn)研究，分析了孔隙水飽和度對粉煤灰混凝土彈性模量的影響規(guī)律。研究結(jié)果表明，粉煤灰混凝土的彈性模量隨著孔隙水飽和度的增大而增大，當(dāng)孔隙水飽和度不大于20%時(shí)，彈性模量隨孔隙水飽和度的增加而緩慢增大，孔隙水飽和度從20%增加到60%時(shí)，彈性模量迅速增大，孔隙水飽和度大于60%時(shí)，彈性模量緩慢增大。
[Abstract]:The effect of pore water saturation on the mechanical properties of fly ash concrete is studied in this paper. The effects of relative humidity, temperature, fly ash content and water / binder ratio on pore water saturation of fly ash concrete are obtained. The influence of pore water saturation on compressive strength and elastic modulus of fly ash concrete is discussed, and the influence of pore water saturation on nondestructive testing of compressive strength of fly ash concrete is studied. The main contents are as follows:. The pore water saturation of concrete with different water / binder ratio and fly ash content under different temperature and humidity conditions was studied, and the relative humidity and temperature of microenvironment were analyzed. The results show that the pore water saturation increases with the increase of relative humidity, the decrease of temperature and the decrease of water-binder ratio. When the content of fly ash is not more than 15, the saturation of pore water increases with the increase of the amount of fly ash, and when the content of fly ash exceeds 15, the saturation of pore water decreases. Finally, the relative humidity and temperature of microenvironment are analyzed. The correlation between the content of fly ash and the ratio of water to binder and the saturation of pore water in concrete. The compressive strength of fly ash concrete with different pore water saturation is studied, and the influence of pore water saturation on compressive strength of fly ash concrete is analyzed. The compressive strength of fly ash concrete decreases with the increase of pore water saturation. When the pore water saturation is less than 20, the compressive strength decreases slowly with the increase of pore water saturation, and the pore water saturation increases from 20% to 60. The compressive strength decreases rapidly, and when the pore water saturation is greater than 60, the compressive strength tends to be stable. The effects of different pore water saturation on the rebound value and ultrasonic sound velocity of fly ash concrete are studied. The influence of pore water saturation on nondestructive testing of compressive strength of fly ash concrete is analyzed. The average springback value decreases with the increase of pore water saturation, and the ultrasonic sound velocity increases with the increase of pore water saturation. Finally, the strength measurement curve of fly ash concrete considering pore water saturation is established. The elastic modulus of fly ash concrete with different pore water saturation is studied, and the influence of pore water saturation on elastic modulus of fly ash concrete is analyzed. The elastic modulus of fly ash concrete increases with the increase of pore water saturation. When the pore water saturation is less than 20, the elastic modulus increases slowly with the increase of pore water saturation, and the pore water saturation increases from 20% to 60. The elastic modulus increases rapidly, and when the pore water saturation is greater than 60, the elastic modulus increases slowly.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU528

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 姬永生;袁廣林;劉輝;高立磊;張雯雯;;粉煤灰在水泥和混凝土中應(yīng)用對改善混凝土細(xì)觀結(jié)構(gòu)的對比試驗(yàn)研究[J];四川建筑科學(xué)研究;2006年06期

2 姬永生;董亞男;袁迎曙;吳曉峰;柏霞;;混凝土孔隙水飽和度的機(jī)理分析[J];四川建筑科學(xué)研究;2010年02期

3 李艷茹;姜海波;;混凝土骨料含量對彈性模量的影響預(yù)測[J];四川建筑科學(xué)研究;2012年01期

4 劉保東;陳建波;李明;李鵬飛;;不同含水率對鋼筋混凝土柱推倒分析的影響[J];北京交通大學(xué)學(xué)報(bào);2011年01期

5 周耀;王元豐;韓冰;楊健;;探地雷達(dá)檢測混凝土含水率試驗(yàn)研究[J];北京交通大學(xué)學(xué)報(bào);2011年01期

6 白衛(wèi)峰;陳健云;孫勝男;;孔隙濕度對混凝土初始彈性模量影響[J];大連理工大學(xué)學(xué)報(bào);2010年05期

7 吳正嚴(yán);粉煤灰混凝土的發(fā)展方興未艾[J];粉煤灰;2000年01期

8 陳樹東;費(fèi)治華;;粉煤灰混凝土抗酸雨侵蝕的研究[J];粉煤灰綜合利用;2011年01期

9 李國棟;粉煤灰的結(jié)構(gòu)、形態(tài)與活性特征[J];粉煤灰綜合利用;1998年03期

10 白衛(wèi)峰;陳健云;范書立;;細(xì)觀夾雜理論預(yù)測濕態(tài)混凝土抗壓強(qiáng)度[J];工程力學(xué);2008年11期

相關(guān)博士學(xué)位論文 前1條

1 孫海燕;從微結(jié)構(gòu)形成與劣化機(jī)理研究水工混凝土粉煤灰臨界摻量[D];武漢大學(xué);2010年

本文編號：1564194