公路混凝土增韌及其水化機(jī)理研究
[Abstract]:In this paper, steel slag powder and slag powder are used to strengthen the toughness of highway concrete. On the basis of measuring the fineness, chemical composition, mineral composition and microstructure of steel slag and slag raw materials, this paper starts from the requirements of material toughness and wear resistance of highway concrete pavement. Through the optimization and combination of the basic components of concrete and the reasonable selection of cement clinker, mixture, admixture and mix ratio, the hydration properties and microstructure of hydration products of steel slag powder, slag powder and slag powder were studied. The influence of steel slag powder and slag powder on the physical and mechanical properties of cement and concrete was studied. In this paper, the influence of steel slag powder and slag powder on the strength of cement mortar is studied. The results show that the steel slag powder and slag powder replace 40% cement clinker in equal quantity under the condition of this paper, and the mass ratio of the two is 3:7. The addition of steel slag powder and slag powder can improve the strength of cement sand and enhance the wear resistance of cement sand. In this paper, the influence of steel slag powder and slag powder on the mechanical properties of cement concrete is studied. The results show that the compressive strength, flexural tensile strength and splitting strength of cement concrete are improved by the addition of steel slag powder and slag powder. At the same time, the physical and mechanical indexes of highway cement concrete are strengthened, especially the flexural tensile strength. At the same time, the flexural toughness test of cement concrete mixed with steel slag powder is carried out and compared with steel fiber concrete. The results show that the double mixing of steel slag powder can effectively improve the toughness of concrete. Although its toughening effect is not as good as steel fiber, it is more effective than blank group. The microstructures of hydration products of steel slag powder and slag powder were studied. The results show that the hydration and pore size distribution of hydrates can be improved by different addition of slag powder. Among them, the effect of single addition of slag powder is the most obvious, it can obviously reduce the number of micropores in hydrates, the co-mixing of slag powder of steel slag powder can also improve the pore size distribution of hydrates, but the effect is not as obvious as that of slag powder alone. When steel slag powder is added, the pore size distribution of hydrates is the least obvious. It is especially emphasized that although the addition of different steel slag powder has different influence on the pore size distribution of hydrates, it has been improved in general, and the addition of steel slag powder can effectively reduce the bad pore size (50nm) in hydrates.
【學(xué)位授予單位】:河南工業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:U414
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 曾艷;;大摻量粉煤灰高性能混凝土配制及性能研究[J];粉煤灰;2006年04期
2 張?zhí)m芳;;用堿激發(fā)礦渣、粉煤灰提高混凝土強(qiáng)度和抗碳化性能的試驗(yàn)研究[J];粉煤灰;2007年06期
3 孫世國(guó),王保民;鋼渣粉和粉煤灰對(duì)鋼渣混凝土力學(xué)性能的影響特點(diǎn)[J];粉煤灰綜合利用;2004年01期
4 陳劍雄;張?zhí)m芳;李世偉;;粉煤灰對(duì)堿礦渣混凝土性能的影響[J];粉煤灰綜合利用;2006年01期
5 李倩;曹素改;張若思;王金霞;;利用鋼渣、礦渣制備生態(tài)型水泥[J];粉煤灰綜合利用;2009年06期
6 盧鐵瑞;侯獻(xiàn)云;白洪嶺;白紅英;;水泥混凝土路面再生利用技術(shù)應(yīng)用研究[J];公路交通科技;2006年11期
7 佟博;鄧宗才;趙尚傳;;外加劑、摻和料對(duì)高性能混凝土的影響[J];公路交通科技(應(yīng)用技術(shù)版);2010年06期
8 周煥海,唐明述,吳學(xué)權(quán),許仲梓;堿—礦渣水泥漿體的孔結(jié)構(gòu)和強(qiáng)度[J];硅酸鹽通報(bào);1994年03期
9 朱海堂,高丹盈,謝麗,張啟明;鋼纖維高強(qiáng)混凝土彎曲韌性的研究[J];硅酸鹽學(xué)報(bào);2004年05期
10 肖琪仲,錢光人;鋼渣在高溫高壓下的水熱反應(yīng)[J];硅酸鹽學(xué)報(bào);1999年04期
本文編號(hào):2260838
本文鏈接:http://sikaile.net/kejilunwen/jiaotonggongchenglunwen/2260838.html