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A platform for research: civil engineering, architecture and urbanism
Core-shell-structure lightweight aggregate prepared by cold bonding method and preparation method thereof
The invention discloses a core-shell-structure lightweight aggregate prepared by a cold bonding method and a preparation method thereof. The preparation method comprises the following steps: preparinga calcined clay-based environment-friendly cementing material from ordinary Portland cement, calcined clay, limestone powder and gypsum in proportion; putting core material particles into a lightweight aggregate granulation device, then adding the calcined clay-based environment-friendly cementing material, and uniformly spraying a mixture for granulation to form primary cold-bonded aggregate; carrying out primary maintenance on the primarily-generated cold-bonded aggregate, soaking the primarily-generated cold-bonded aggregate in a solution containing organic acid or phenol compounds, takingout the primarily-generated cold-bonded aggregate, airing, and repeatedly spraying a calcium hydroxide aqueous solution on the surface of the aggregate to form aggregate with a super-hydrophobic surface; and subjecting the aggregate with the super-hydrophobic surface to water for secondary maintenance to produce the super-hydrophobic high-strength lightweight aggregate. According to the core-shell structure lightweight aggregate and the preparation method thereof, energy is saved, consumption is low, the processing flow is simplified, solid waste recycling can be achieved, the water absorption rate is low, and the single bearing capacity is high.
本发明公开了一种冷粘法制备核壳结构轻骨料及其制备方法，方法包括：将普通硅酸盐水泥、煅烧粘土、石灰石粉、石膏按比例配置成煅烧粘土基绿色环保胶凝材料；将内核材料颗粒放进轻骨料造粒装置内，然后投放煅烧粘土基绿色环保胶凝材料，并均匀喷洒混合剂进行造粒，形成初生冷粘骨料；将初生冷粘骨料进行第一次养护并放进盛有有机酸或苯酚类化合物的溶液中浸泡，取出晾干，然后用氢氧化钙水溶液反复喷洒骨料表面，形成表面超疏水的骨料；把表面超疏水的骨料继续放进水中进行第二次养护，生产出超疏水高强轻质骨料。本发明是一种节能低耗、简化加工流程且能时实现固废资源化的、吸水率低且单颗承载力高的核壳结构轻骨料及其制备方法。
Core-shell-structure lightweight aggregate prepared by cold bonding method and preparation method thereof
The invention discloses a core-shell-structure lightweight aggregate prepared by a cold bonding method and a preparation method thereof. The preparation method comprises the following steps: preparinga calcined clay-based environment-friendly cementing material from ordinary Portland cement, calcined clay, limestone powder and gypsum in proportion; putting core material particles into a lightweight aggregate granulation device, then adding the calcined clay-based environment-friendly cementing material, and uniformly spraying a mixture for granulation to form primary cold-bonded aggregate; carrying out primary maintenance on the primarily-generated cold-bonded aggregate, soaking the primarily-generated cold-bonded aggregate in a solution containing organic acid or phenol compounds, takingout the primarily-generated cold-bonded aggregate, airing, and repeatedly spraying a calcium hydroxide aqueous solution on the surface of the aggregate to form aggregate with a super-hydrophobic surface; and subjecting the aggregate with the super-hydrophobic surface to water for secondary maintenance to produce the super-hydrophobic high-strength lightweight aggregate. According to the core-shell structure lightweight aggregate and the preparation method thereof, energy is saved, consumption is low, the processing flow is simplified, solid waste recycling can be achieved, the water absorption rate is low, and the single bearing capacity is high.
本发明公开了一种冷粘法制备核壳结构轻骨料及其制备方法，方法包括：将普通硅酸盐水泥、煅烧粘土、石灰石粉、石膏按比例配置成煅烧粘土基绿色环保胶凝材料；将内核材料颗粒放进轻骨料造粒装置内，然后投放煅烧粘土基绿色环保胶凝材料，并均匀喷洒混合剂进行造粒，形成初生冷粘骨料；将初生冷粘骨料进行第一次养护并放进盛有有机酸或苯酚类化合物的溶液中浸泡，取出晾干，然后用氢氧化钙水溶液反复喷洒骨料表面，形成表面超疏水的骨料；把表面超疏水的骨料继续放进水中进行第二次养护，生产出超疏水高强轻质骨料。本发明是一种节能低耗、简化加工流程且能时实现固废资源化的、吸水率低且单颗承载力高的核壳结构轻骨料及其制备方法。
Core-shell-structure lightweight aggregate prepared by cold bonding method and preparation method thereof
冷粘法制备核壳结构轻骨料及其制备方法
HUANG ZHENYU (author) / DENG WEIXIONG (author) / LI KANGYU (author)
2020-08-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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