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A platform for research: civil engineering, architecture and urbanism
Red mud lightweight aggregate as well as preparation method and application thereof
The invention belongs to the technical field of comprehensive utilization of solid wastes, and discloses a red mud lightweight aggregate as well as a preparation method and application thereof. According to the invention, Bayer process red mud, fly ash, metakaolin and talcum powder are used as main raw materials, calcium carbonate and magnesium carbonate are added as pore forming agents, and a proper firing process is matched to prepare the red mud lightweight aggregate with good sintering performance (the volume density is greater than or equal to 1.2. cm<-3>), medium and high mechanical strength (the cylinder compressive strength is greater than or equal to 5.5 MPa), high water absorption rate (greater than or equal to 13%) and excellent alkali corrosion resistance. The red mud lightweight aggregate not only can solve the problem of solid waste red mud treatment, but also can promote the development of light aggregate high-strength concrete, realizes the comprehensive utilization ofa large amount of industrial solid wastes, protects the environment, and has a popularization value.
本发明属于固体废弃物综合利用技术领域，公开了一种赤泥质轻集料及其制备方法与应用。本发明以拜耳法赤泥、粉煤灰、偏高岭土、滑石粉为主要原料，添加碳酸钙和碳酸镁为造孔剂，并配以适宜的烧制工艺，制备出烧结性能好(体积密度≥1.2·cm‑3)、中高力学强度(筒压强度≥5.5MPa)、高吸水率(≥13％)且耐碱腐蚀性能优异的赤泥质轻集料。本发明不仅仅可以解决固体废弃物赤泥处理问题，同时也能够促进轻集料高强混凝土发展，实现了大宗工业固体废弃物的综合利用，保护了环境，具有推广价值。
Red mud lightweight aggregate as well as preparation method and application thereof
The invention belongs to the technical field of comprehensive utilization of solid wastes, and discloses a red mud lightweight aggregate as well as a preparation method and application thereof. According to the invention, Bayer process red mud, fly ash, metakaolin and talcum powder are used as main raw materials, calcium carbonate and magnesium carbonate are added as pore forming agents, and a proper firing process is matched to prepare the red mud lightweight aggregate with good sintering performance (the volume density is greater than or equal to 1.2. cm<-3>), medium and high mechanical strength (the cylinder compressive strength is greater than or equal to 5.5 MPa), high water absorption rate (greater than or equal to 13%) and excellent alkali corrosion resistance. The red mud lightweight aggregate not only can solve the problem of solid waste red mud treatment, but also can promote the development of light aggregate high-strength concrete, realizes the comprehensive utilization ofa large amount of industrial solid wastes, protects the environment, and has a popularization value.
本发明属于固体废弃物综合利用技术领域，公开了一种赤泥质轻集料及其制备方法与应用。本发明以拜耳法赤泥、粉煤灰、偏高岭土、滑石粉为主要原料，添加碳酸钙和碳酸镁为造孔剂，并配以适宜的烧制工艺，制备出烧结性能好(体积密度≥1.2·cm‑3)、中高力学强度(筒压强度≥5.5MPa)、高吸水率(≥13％)且耐碱腐蚀性能优异的赤泥质轻集料。本发明不仅仅可以解决固体废弃物赤泥处理问题，同时也能够促进轻集料高强混凝土发展，实现了大宗工业固体废弃物的综合利用，保护了环境，具有推广价值。
Red mud lightweight aggregate as well as preparation method and application thereof
一种赤泥质轻集料及其制备方法与应用
ZHANG GAOZHAN (author) / XIANG WEIHENG (author) / HU CHENG (author) / DING QINGJUN (author) / HOU DONGSHUAI (author) / SUN DAOSHENG (author) / YANG JUN (author) / WANG AIGUO (author) / LIU KAIWEI (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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