| abstract |
The invention discloses red mud-based cementitious materials, red mud-based light-weight aggregates, red mud-based light-weight aggregate concrete and preparation methods thereof. Foaming agent and silicone water repellent materials can improve the performance of red mud-based lightweight aggregates, and further improve the performance of lightweight aggregate concrete, which not only improves the strength of red mud-based lightweight aggregate/lightweight aggregate concrete, but also improves its durability. sex. Red mud-based cementitious materials are low-alkalinity sulfur-aluminum-based cementitious materials, and the preparation process of red mud-based light aggregates forms geopolymers such as sodium aluminosilicate/calcium aluminosilicate, which can achieve Na + solidification. While improving the strength of the non-burning lightweight aggregate, the alkalinity of the concrete is reduced, thereby alleviating the alkali-aggregate reaction of the lightweight aggregate concrete and improving its durability. The addition of hydrogen peroxide foaming agent can reduce the density of non-burning lightweight aggregate, and the silicone waterproofing agent can reduce its water absorption. |