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Bayer process red mud-based high-strength cementing material and preparation method thereof
The invention relates to preparation of a Bayer process red mud-based high-strength cementing material, and belongs to the field of building materials. The method is characterized in that dealkalized red mud and dealkalized liquor obtained after Bayer process red mud in-situ dealkalization are used as main components, high-sulfur solid waste and slag are added, and wet process ball milling is carried out to prepare the high-sulfur-content red mud adsorbent. The method mainly comprises the following steps: pumping red mud slurry into a dealkalization pool, adding a dealkalization agent, keeping a certain liquid-solid ratio, fully and uniformly mixing, and continuously stirring at a certain temperature until dealkalization is finished, so as to obtain dealkalized red mud slurry; and mixing the dealkalized slurry with part of slag, performing wet grinding, and fully and uniformly stirring with slag powder and high-sulfur solid waste powder which are subjected to dry grinding to certain fineness to obtain the red-mud-based high-strength cementing material. The 28-day compressive strength of the prepared cementing material is larger than or equal to 55.0 MPa, the breaking strength is larger than or equal to 8.0 MPa, the sulfate attack resistance coefficient is larger than or equal to 1.0, and the shrinkage rate is smaller than 0.01%. The cementing material has the advantages of high strength, good sulfate corrosion resistance, low shrinkage rate and the like, and is especially suitable for ocean engineering construction.
本发明涉及一种拜耳法赤泥基高强胶凝材料的制备，属于建筑材料领域。其特征在于利用拜耳法赤泥原位脱碱后的脱碱赤泥和脱碱液为主要组分，加入高硫固废和矿渣，通过湿法球磨制备而成。主要包括以下步骤：将赤泥浆料泵入脱碱池，加入脱碱剂，保持一定液‑固比，充分混匀后在一定温度下连续搅拌至脱碱结束，将脱碱后浆料与部分矿渣混合湿磨后再与干磨至一定细度的矿渣粉、高硫固废粉充分搅拌均匀得到赤泥基高强胶凝材料。本专利制备的胶凝材料28天抗压强度≥55.0MPa，抗折强度≥8.0 MPa，抗硫酸盐侵蚀系数≥1.0，收缩率＜0.01%。该胶凝材料具有强度高、抗硫酸盐侵蚀性能好、收缩率低等优点，尤其适用于海洋工程建设。
Bayer process red mud-based high-strength cementing material and preparation method thereof
The invention relates to preparation of a Bayer process red mud-based high-strength cementing material, and belongs to the field of building materials. The method is characterized in that dealkalized red mud and dealkalized liquor obtained after Bayer process red mud in-situ dealkalization are used as main components, high-sulfur solid waste and slag are added, and wet process ball milling is carried out to prepare the high-sulfur-content red mud adsorbent. The method mainly comprises the following steps: pumping red mud slurry into a dealkalization pool, adding a dealkalization agent, keeping a certain liquid-solid ratio, fully and uniformly mixing, and continuously stirring at a certain temperature until dealkalization is finished, so as to obtain dealkalized red mud slurry; and mixing the dealkalized slurry with part of slag, performing wet grinding, and fully and uniformly stirring with slag powder and high-sulfur solid waste powder which are subjected to dry grinding to certain fineness to obtain the red-mud-based high-strength cementing material. The 28-day compressive strength of the prepared cementing material is larger than or equal to 55.0 MPa, the breaking strength is larger than or equal to 8.0 MPa, the sulfate attack resistance coefficient is larger than or equal to 1.0, and the shrinkage rate is smaller than 0.01%. The cementing material has the advantages of high strength, good sulfate corrosion resistance, low shrinkage rate and the like, and is especially suitable for ocean engineering construction.
本发明涉及一种拜耳法赤泥基高强胶凝材料的制备，属于建筑材料领域。其特征在于利用拜耳法赤泥原位脱碱后的脱碱赤泥和脱碱液为主要组分，加入高硫固废和矿渣，通过湿法球磨制备而成。主要包括以下步骤：将赤泥浆料泵入脱碱池，加入脱碱剂，保持一定液‑固比，充分混匀后在一定温度下连续搅拌至脱碱结束，将脱碱后浆料与部分矿渣混合湿磨后再与干磨至一定细度的矿渣粉、高硫固废粉充分搅拌均匀得到赤泥基高强胶凝材料。本专利制备的胶凝材料28天抗压强度≥55.0MPa，抗折强度≥8.0 MPa，抗硫酸盐侵蚀系数≥1.0，收缩率＜0.01%。该胶凝材料具有强度高、抗硫酸盐侵蚀性能好、收缩率低等优点，尤其适用于海洋工程建设。
Bayer process red mud-based high-strength cementing material and preparation method thereof
一种拜耳法赤泥基高强胶凝材料及制备方法
ZHAO YANRONG (author) / LI CHANGCHUN (author) / YAN XUNQIAO (author) / GE CHUANQI (author) / LIN XIAOYUAN (author) / QIN YOUQUAN (author) / GUAN QIZHENG (author) / HE SHENXIAN (author)
2024-08-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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