Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-performance core-shell lightweight aggregate and preparation method thereof
The invention relates to the technical field of building materials, and discloses a high-performance core-shell lightweight aggregate and a preparation method thereof. The high-performance core-shell lightweight aggregate is composed of an inner core and an outer shell, wherein the inner core comprises the following raw materials: fly ash, bauxite, light-burned magnesia and quartz powder; the shell raw materials comprise bauxite, clay, anhydrite and limestone; the mass ratio of the inner core to the shell is (1:0.2)-(1:0.4). The high-performance core-shell lightweight aggregate is prepared by the steps of pelletizing, surface powder coating and high-temperature sintering in sequence. The inner core of the high-performance core-shell lightweight aggregate prepared by the invention is composed of cordierite, anorthite and spinel, the outer shell is composed of beta-dicalcium silicate and tetracalcium sulphoaluminate, the raw materials of the inner core and the outer shell are subjected to high-temperature diffusion reaction and liquid-phase sintering to generate a glass phase, and eutectic fusion of akermanite and anorthite forms an interface bonding area; so that the high-performance lightweight aggregate has the characteristics of light weight, high strength, low water absorption and surface reaction activity, and the interface transition area and the mechanical property of the lightweight aggregate concrete can be remarkably improved.
本发明涉及建筑材料技术领域，公开了一种高性能核壳轻集料及其制备方法，该高性能核壳轻集料由内核和外壳两部分组成；内核原料包括粉煤灰、铝矾土、轻烧镁砂和石英粉；外壳原料包括铝矾土、粘土、硬石膏和石灰石；内核和外壳的质量比为1:0.2～1:0.4。该高性能核壳轻集料依次经造粒成球、表面裹粉和高温烧结制备而成。采用本发明制备的高性能核壳轻集料内核组成为堇青石、钙长石和尖晶石，外壳组成为β‑硅酸二钙和硫铝酸四钙，内核、外壳原料经高温扩散反应和液相烧结产生玻璃相、镁黄长石和钙长石的低共熔化合形成物界面结合区，使得高性能轻集料具有轻质高强、低吸水和表面反应活性的特点，可显著改善并提升轻集料混凝土界面过渡区和力学性能。
High-performance core-shell lightweight aggregate and preparation method thereof
The invention relates to the technical field of building materials, and discloses a high-performance core-shell lightweight aggregate and a preparation method thereof. The high-performance core-shell lightweight aggregate is composed of an inner core and an outer shell, wherein the inner core comprises the following raw materials: fly ash, bauxite, light-burned magnesia and quartz powder; the shell raw materials comprise bauxite, clay, anhydrite and limestone; the mass ratio of the inner core to the shell is (1:0.2)-(1:0.4). The high-performance core-shell lightweight aggregate is prepared by the steps of pelletizing, surface powder coating and high-temperature sintering in sequence. The inner core of the high-performance core-shell lightweight aggregate prepared by the invention is composed of cordierite, anorthite and spinel, the outer shell is composed of beta-dicalcium silicate and tetracalcium sulphoaluminate, the raw materials of the inner core and the outer shell are subjected to high-temperature diffusion reaction and liquid-phase sintering to generate a glass phase, and eutectic fusion of akermanite and anorthite forms an interface bonding area; so that the high-performance lightweight aggregate has the characteristics of light weight, high strength, low water absorption and surface reaction activity, and the interface transition area and the mechanical property of the lightweight aggregate concrete can be remarkably improved.
本发明涉及建筑材料技术领域，公开了一种高性能核壳轻集料及其制备方法，该高性能核壳轻集料由内核和外壳两部分组成；内核原料包括粉煤灰、铝矾土、轻烧镁砂和石英粉；外壳原料包括铝矾土、粘土、硬石膏和石灰石；内核和外壳的质量比为1:0.2～1:0.4。该高性能核壳轻集料依次经造粒成球、表面裹粉和高温烧结制备而成。采用本发明制备的高性能核壳轻集料内核组成为堇青石、钙长石和尖晶石，外壳组成为β‑硅酸二钙和硫铝酸四钙，内核、外壳原料经高温扩散反应和液相烧结产生玻璃相、镁黄长石和钙长石的低共熔化合形成物界面结合区，使得高性能轻集料具有轻质高强、低吸水和表面反应活性的特点，可显著改善并提升轻集料混凝土界面过渡区和力学性能。
High-performance core-shell lightweight aggregate and preparation method thereof
一种高性能核壳轻集料及其制备方法
ZHANG LIHUA (Autor:in) / LIU LAIBAO (Autor:in) / MA XIN (Autor:in) / LIU CHUANBEI (Autor:in) / ZHANG HONGPING (Autor:in)
28.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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