A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geopolymer-stabilized phosphate tailing pavement base layer and preparation method thereof
The invention provides a geopolymer-stabilized phosphate tailing pavement base layer. The geopolymer-stabilized phosphate tailing pavement base layer is prepared from 6-20 wt% of calcium carbide slag, 15-24 wt% of one or two of phosphorus slag powder and fly ash, and 60-70 wt% of phosphate tailings. The invention further provides a preparation method of the geopolymer-stabilized phosphate tailing pavement base layer. According to the pavement base layer, an alkaline environment is formed through dissolution and ionization of the main component Ca(OH)2 of the calcium carbide slag, conditions are provided for fracture of silicon-oxygen bonds in the phosphorus slag powder or the fly ash, geopolymer gel such as hydrated calcium silicate (C-S-H) and hydrated calcium aluminate (C-A-H) is generated through recombination, the geopolymer gel is cemented between phosphorus tailing particles, and then curing and mutual interlocking are carried out to form a rigid matrix with mechanical strength, and the mechanical property and durability of the pavement base layer are built. According to the invention, solid waste is recycled, the use of the curing agent is reduced, the engineering cost is reduced, the construction is simple, and the environmental harm is small.
本发明提供了一种地聚合物稳定磷尾矿路面基层，其由6～20wt％的电石渣，15～24wt％的磷渣粉和粉煤灰中的一种或两种，60～70wt％的磷尾矿制备得到。本申请还提供了一种地聚合物稳定磷尾矿路面基层的制备方法。本申请路面基层通过电石渣主要成分Ca(OH)2溶解和电离形成碱性环境，为磷渣粉或粉煤灰中硅‑氧键的断裂提供条件，以及重新组合生成水化硅酸钙(C‑S‑H)和水化铝酸钙(C‑A‑H)等地聚合物凝胶，地聚合物凝胶在磷尾矿颗粒之间胶结，继而固化和相互嵌锁成具有机械强度的刚性基体，筑成路面基层的力学性能和耐久性能。本发明实现了固废物的再利用，减少固化剂的使用，降低了工程成本，施工简单，环境危害小。
Geopolymer-stabilized phosphate tailing pavement base layer and preparation method thereof
The invention provides a geopolymer-stabilized phosphate tailing pavement base layer. The geopolymer-stabilized phosphate tailing pavement base layer is prepared from 6-20 wt% of calcium carbide slag, 15-24 wt% of one or two of phosphorus slag powder and fly ash, and 60-70 wt% of phosphate tailings. The invention further provides a preparation method of the geopolymer-stabilized phosphate tailing pavement base layer. According to the pavement base layer, an alkaline environment is formed through dissolution and ionization of the main component Ca(OH)2 of the calcium carbide slag, conditions are provided for fracture of silicon-oxygen bonds in the phosphorus slag powder or the fly ash, geopolymer gel such as hydrated calcium silicate (C-S-H) and hydrated calcium aluminate (C-A-H) is generated through recombination, the geopolymer gel is cemented between phosphorus tailing particles, and then curing and mutual interlocking are carried out to form a rigid matrix with mechanical strength, and the mechanical property and durability of the pavement base layer are built. According to the invention, solid waste is recycled, the use of the curing agent is reduced, the engineering cost is reduced, the construction is simple, and the environmental harm is small.
本发明提供了一种地聚合物稳定磷尾矿路面基层，其由6～20wt％的电石渣，15～24wt％的磷渣粉和粉煤灰中的一种或两种，60～70wt％的磷尾矿制备得到。本申请还提供了一种地聚合物稳定磷尾矿路面基层的制备方法。本申请路面基层通过电石渣主要成分Ca(OH)2溶解和电离形成碱性环境，为磷渣粉或粉煤灰中硅‑氧键的断裂提供条件，以及重新组合生成水化硅酸钙(C‑S‑H)和水化铝酸钙(C‑A‑H)等地聚合物凝胶，地聚合物凝胶在磷尾矿颗粒之间胶结，继而固化和相互嵌锁成具有机械强度的刚性基体，筑成路面基层的力学性能和耐久性能。本发明实现了固废物的再利用，减少固化剂的使用，降低了工程成本，施工简单，环境危害小。
Geopolymer-stabilized phosphate tailing pavement base layer and preparation method thereof
一种地聚合物稳定磷尾矿路面基层及其制备方法
LI JIANQIU (author) / LIU ZUDONG (author) / ZHANG QINGGANG (author) / WEN YUANBO (author) / WANG JIACAI (author) / ZHAO QINGLIN (author) / ZHOU SHANGQUN (author)
2021-10-26
Patent
Electronic Resource
Chinese
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