Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cement-free high-strength unfired lightweight aggregate prepared from coal gangue and red mud and method
The invention discloses a cement-free high-strength unfired lightweight aggregate prepared from coal gangue and red mud and a method, an alkaline hydration environment is formed by adding slaked lime and red mud, active SiO2 and active Al2O3 in the pretreated coal gangue are subjected to a hydration reaction to generate gelled substances such as hydrated calcium silicate, and the strength of the lightweight aggregate is improved. The cylinder compressive strength of the prepared cement-free unfired lightweight aggregate is 6.8-7.9 MPa, the bulk density is 858-890 kg/m < 3 >, the softening coefficient is larger than 0.8, and the cement-free unfired lightweight aggregate can be used as building aggregate and is a green lightweight aggregate with development potential. The coal gangue and the red mud which are used as raw materials are solid wastes, the total use amount of the solid wastes reaches 80% or above, sintering and steam curing are not needed, the production cost is low, the preparation process is simple, large-scale production is easy to achieve, the method has important significance on recycling of the coal gangue and the red mud, and the market prospect is wide.
本发明公开了一种利用煤矸石和赤泥制备的无水泥高强免烧轻集料及方法，通过添加消石灰和赤泥形成了一个碱性水化环境，预处理后的煤矸石中活性SiO2、活性Al2O3发生水化反应，生成水化硅酸钙等胶凝物质，提供轻集料的强度。制得的无水泥免烧轻集料筒压强度为6.8～7.9MPa，堆积密度为858～890kg/m3，软化系数大于0.8，可用于建筑骨料，是一种具备发展潜力的绿色轻集料。本发明所使用的原料煤矸石和赤泥均为固体废弃物，固废总用量达到80％以上，且无需进行烧结、蒸养，生产成本较低，制备工艺简单，易于实现规模化生产，对实现煤矸石和赤泥资源化具有重要意义，市场前景广阔。
Cement-free high-strength unfired lightweight aggregate prepared from coal gangue and red mud and method
The invention discloses a cement-free high-strength unfired lightweight aggregate prepared from coal gangue and red mud and a method, an alkaline hydration environment is formed by adding slaked lime and red mud, active SiO2 and active Al2O3 in the pretreated coal gangue are subjected to a hydration reaction to generate gelled substances such as hydrated calcium silicate, and the strength of the lightweight aggregate is improved. The cylinder compressive strength of the prepared cement-free unfired lightweight aggregate is 6.8-7.9 MPa, the bulk density is 858-890 kg/m < 3 >, the softening coefficient is larger than 0.8, and the cement-free unfired lightweight aggregate can be used as building aggregate and is a green lightweight aggregate with development potential. The coal gangue and the red mud which are used as raw materials are solid wastes, the total use amount of the solid wastes reaches 80% or above, sintering and steam curing are not needed, the production cost is low, the preparation process is simple, large-scale production is easy to achieve, the method has important significance on recycling of the coal gangue and the red mud, and the market prospect is wide.
本发明公开了一种利用煤矸石和赤泥制备的无水泥高强免烧轻集料及方法，通过添加消石灰和赤泥形成了一个碱性水化环境，预处理后的煤矸石中活性SiO2、活性Al2O3发生水化反应，生成水化硅酸钙等胶凝物质，提供轻集料的强度。制得的无水泥免烧轻集料筒压强度为6.8～7.9MPa，堆积密度为858～890kg/m3，软化系数大于0.8，可用于建筑骨料，是一种具备发展潜力的绿色轻集料。本发明所使用的原料煤矸石和赤泥均为固体废弃物，固废总用量达到80％以上，且无需进行烧结、蒸养，生产成本较低，制备工艺简单，易于实现规模化生产，对实现煤矸石和赤泥资源化具有重要意义，市场前景广阔。
Cement-free high-strength unfired lightweight aggregate prepared from coal gangue and red mud and method
利用煤矸石和赤泥制备的无水泥高强免烧轻集料及方法
LIU WANCHAO (Autor:in) / WANG XIAO (Autor:in) / ZHOU XIAOFENG (Autor:in) / WANG SONG (Autor:in) / LI SHUAI (Autor:in) / LIAN YICHENG (Autor:in) / YAN FEIFEI (Autor:in) / ZHANG JIANWU (Autor:in) / JIN BIAO (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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