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Silica fume modified full-coal gangue coarse aggregate concrete and preparation method thereof
The invention discloses silica fume modified full-coal gangue coarse aggregate concrete and a preparation method thereof, and belongs to the technical field of concrete materials.After silica fume is introduced into the concrete, due to the fact that the silica fume has the larger specific surface area, the filling effect and the micro-aggregate effect can be better exerted, part of holes and micro-cracks of coal gangue aggregate are filled, and therefore the concrete has the good comprehensive performance; in addition, the silica fume contains a large amount of SiO2, Ca (OH) 2 enriched in a coal gangue concrete interface transition area is subjected to a hydration reaction, and a large amount of C-S-H gel of a three-dimensional network structure is generated; when the coal gangue aggregate is added, a large amount of coal gangue powder containing silicon-aluminum oxide is adsorbed around the aggregate, part of ettringite is generated around a coal gangue concrete interface transition area, and generated three-dimensional C-S-H gel and ettringite serve as a framework structure to bridge the coal gangue coarse aggregate and a mortar base body; pores and micro-cracks in the concrete are refined and reduced, and the mechanical property of the full-coal gangue coarse aggregate concrete is effectively improved.
本发明公开了一种硅灰改性全煤矸石粗骨料混凝土及其制备方法，属于混凝土材料技术领域，本发明在混凝土中引入硅灰后，由于硅灰具有更大的比表面积，能更好地发挥填充效应和微集料效应，填充了煤矸石骨料的部分孔洞与微裂缝，另外硅灰含有大量SiO2，煤矸石混凝土界面过渡区内富集的Ca(OH)2发生水化反应，生成大量三维网状结构的C‑S‑H凝胶；由于投入煤矸石骨料时，骨料周围吸附大量含有硅铝氧化物的煤矸石粉，将煤矸石混凝土界面过渡区周围产生部分钙矾石，生成的三维C‑S‑H凝胶和钙矾石作为骨架结构桥连了煤矸石粗骨料与砂浆基体，细化并减少了混凝土内部孔隙与微裂缝，有效提高了全煤矸石粗骨料混凝土的力学性能。
Silica fume modified full-coal gangue coarse aggregate concrete and preparation method thereof
The invention discloses silica fume modified full-coal gangue coarse aggregate concrete and a preparation method thereof, and belongs to the technical field of concrete materials.After silica fume is introduced into the concrete, due to the fact that the silica fume has the larger specific surface area, the filling effect and the micro-aggregate effect can be better exerted, part of holes and micro-cracks of coal gangue aggregate are filled, and therefore the concrete has the good comprehensive performance; in addition, the silica fume contains a large amount of SiO2, Ca (OH) 2 enriched in a coal gangue concrete interface transition area is subjected to a hydration reaction, and a large amount of C-S-H gel of a three-dimensional network structure is generated; when the coal gangue aggregate is added, a large amount of coal gangue powder containing silicon-aluminum oxide is adsorbed around the aggregate, part of ettringite is generated around a coal gangue concrete interface transition area, and generated three-dimensional C-S-H gel and ettringite serve as a framework structure to bridge the coal gangue coarse aggregate and a mortar base body; pores and micro-cracks in the concrete are refined and reduced, and the mechanical property of the full-coal gangue coarse aggregate concrete is effectively improved.
本发明公开了一种硅灰改性全煤矸石粗骨料混凝土及其制备方法，属于混凝土材料技术领域，本发明在混凝土中引入硅灰后，由于硅灰具有更大的比表面积，能更好地发挥填充效应和微集料效应，填充了煤矸石骨料的部分孔洞与微裂缝，另外硅灰含有大量SiO2，煤矸石混凝土界面过渡区内富集的Ca(OH)2发生水化反应，生成大量三维网状结构的C‑S‑H凝胶；由于投入煤矸石骨料时，骨料周围吸附大量含有硅铝氧化物的煤矸石粉，将煤矸石混凝土界面过渡区周围产生部分钙矾石，生成的三维C‑S‑H凝胶和钙矾石作为骨架结构桥连了煤矸石粗骨料与砂浆基体，细化并减少了混凝土内部孔隙与微裂缝，有效提高了全煤矸石粗骨料混凝土的力学性能。
Silica fume modified full-coal gangue coarse aggregate concrete and preparation method thereof
一种硅灰改性全煤矸石粗骨料混凝土及其制备方法
JING HONGJUN (author) / SHAN JUNWEI (author) / GUO MEIRONG (author) / GAO MENG (author) / CUI YUANQUAN (author)
2024-06-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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