干粉激发煤矸石基地质聚合物性能影响因素研究 |
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干粉激发煤矸石基地质聚合物性能影响因素研究
张大明 ; 任凤玉
【摘
要】 For activating coal gangue in a more efficient and safer way to produce the qualified geopolymer for construc-tion,alkaline dry powder activator made of sodium hydroxide and calcium carbonate powder is used to replace hydroxide solu-tion to treat coal gangue,fly ash and sand. Factors affecting the characteristics of the geopolymer of coal gangue activated by al-kaline dry powder were studied,which is contrasted with that of the traditional sodium hydroxide solution. The results showed that:①Elevating curing temperature and increasing the dosage of sodium hydroxide in dry powder accelerated the setting and hardening of the geopolymer.②Elevating curing temperature increased water absorption and compressive strength of the speci- men.③The increase of calcium carbonate in dry powder raised water absorption rate and compressive strength of geopolymer specimen.④When sodium hydroxide amount in dry powder reached 3%, geopolymer specimen with lowest water absorption rate and highes t compressive strength was obtained.⑤Whether from the viewpoints of water absorption rate or compressive strength,the effect of dry powder activator outperforms that of sodium hydroxide solution activator. Thus,dry powder activator is more suitable for preparing coal gangue-based geopolymer than sodium hydroxide solution activator.% 为更方便、高效、安全地激发煤矸石的活性 , 制造出满足建筑需要的地质聚合物 , 用 氢氧化钠与碳酸钙混合制备的碱性干粉激发剂替代氢氧化钠 , 对煤矸石、粉煤灰和 |
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