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Coal gangue powder used as pump concrete admixture and preparation method and application thereof
The invention relates to the field of environmental protection and resource reutilization, in particular to coal gangue powder used as a pump concrete admixture and a preparation method and application thereof. The preparation method comprises the following steps: calcining natural coal gangue, carrying out hole sealing treatment on the calcined coal gangue by adopting liquid isobutyltriethoxysilane, and finally drying and grinding. When the coal gangue powder prepared by the method is doped into concrete, the early fluidity of the concrete mixture is not obviously reduced, and the production and construction requirements of pump concrete can be met. The construction problem that the fluidity of the concrete is greatly reduced due to the fact that the calcined coal gangue powder is doped into the concrete is solved, meanwhile, on the basis that the isobutyltriethoxysilane can be hydrolyzed in an alkaline environment, the coal gangue powder with holes sealed in the hardened concrete is unsealed, and therefore self-curing of the hardened concrete is facilitated, and the long-term strength and durability of the concrete are improved.
本发明涉及环境保护和资源再利用领域，具体涉及一种用作泵送混凝土掺合料的煤矸石粉及其制备方法和用途。先将天然煤矸石进行煅烧，然后采用液态异丁基三乙氧基硅烷对煅烧煤矸石进行封孔处理，最后干燥、粉磨而制得。本发明方法制备的煤矸石粉掺入混凝土时，混凝土拌合物早期流动性不会明显下降，能满足泵送混凝土的生产和施工要求。本发明解决了煅烧煤矸石粉掺入混凝土导致混凝土流动性大幅度降低的施工难题，同时基于异丁基三乙氧基硅烷在碱性环境中会发生水解，在硬化混凝土中被封孔的煤矸石粉将被解封，从而有利于已硬化混凝土的自养护，促进混凝土后期强度和耐久性的提高。
Coal gangue powder used as pump concrete admixture and preparation method and application thereof
The invention relates to the field of environmental protection and resource reutilization, in particular to coal gangue powder used as a pump concrete admixture and a preparation method and application thereof. The preparation method comprises the following steps: calcining natural coal gangue, carrying out hole sealing treatment on the calcined coal gangue by adopting liquid isobutyltriethoxysilane, and finally drying and grinding. When the coal gangue powder prepared by the method is doped into concrete, the early fluidity of the concrete mixture is not obviously reduced, and the production and construction requirements of pump concrete can be met. The construction problem that the fluidity of the concrete is greatly reduced due to the fact that the calcined coal gangue powder is doped into the concrete is solved, meanwhile, on the basis that the isobutyltriethoxysilane can be hydrolyzed in an alkaline environment, the coal gangue powder with holes sealed in the hardened concrete is unsealed, and therefore self-curing of the hardened concrete is facilitated, and the long-term strength and durability of the concrete are improved.
本发明涉及环境保护和资源再利用领域，具体涉及一种用作泵送混凝土掺合料的煤矸石粉及其制备方法和用途。先将天然煤矸石进行煅烧，然后采用液态异丁基三乙氧基硅烷对煅烧煤矸石进行封孔处理，最后干燥、粉磨而制得。本发明方法制备的煤矸石粉掺入混凝土时，混凝土拌合物早期流动性不会明显下降，能满足泵送混凝土的生产和施工要求。本发明解决了煅烧煤矸石粉掺入混凝土导致混凝土流动性大幅度降低的施工难题，同时基于异丁基三乙氧基硅烷在碱性环境中会发生水解，在硬化混凝土中被封孔的煤矸石粉将被解封，从而有利于已硬化混凝土的自养护，促进混凝土后期强度和耐久性的提高。
Coal gangue powder used as pump concrete admixture and preparation method and application thereof
一种用作泵送混凝土掺合料的煤矸石粉及其制备方法和用途
KE GUOJUN (author) / SHI MAGANG (author) / KE XIPENGDI (author) / SONG BAIXING (author)
2021-08-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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