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CONTROL OF AMMONIA EMISSION FROM AMMONIA-LADEN FLY ASH IN CONCRETE
CONTROL OF AMMONIA EMISSION FROM AMMONIA-LADEN FLY ASH IN CONCRETE
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机译：混凝土中载有氨的粉煤灰中氨气的排放控制
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摘要
The present invention relates to a pozzolanic admixture containing ammonia-laden fly ash, method for making the pozzolanic admixture and method for controlling ammonia gas (NH3) emission from cementitious slurries using the pozzolanic admixture. The associated hypochlorite and ammonia reaction produces monochloramine and chloride salts at relatively low concentration levels harmless to concrete and concrete applications. The resulting monochloramine and chloride salt products are stable and do not dissipate into the air, thereby, eliminating odorous emission that is produced from cementitious slurry containing untreated ammonia laden fly ash. This invention relates to the method of adding hypochlorites (OCl-) in the form of calcium hypochlorite-Ca(OCl)2, lithium hypochlorite-LiOCl, sodium hypochlorite NaOCl or trichloro-s-triazinetrione-C3N3O3Cl3 to the ammonia-laden fly ash at dosage levels, based on ammonia concentration in ash and stoichiometry, for a complete or partial oxidation of ammonia to eliminate, or respectively reduce, ammonia gas evolution from the high pH cementitious slurries.
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机译：含载有粉煤灰的火山灰混合料，制备火山灰混合料的方法和使用该火山灰混合料控制水泥质浆料中氨气（NH 3）排放的方法。伴随的次氯酸盐和氨反应生成相对较低浓度的一氯胺和氯化物盐，对混凝土和混凝土应用无害。所得一氯胺和氯化物盐产物稳定，不会散发到空气中，从而消除了由含有未处理的载有氨的粉煤灰的水泥浆产生的臭味排放。本发明涉及以次氯酸钙-Ca（OCl）2，次氯酸锂-LiOCl，次氯酸钠NaOCl或三氯-s-三嗪三酮-C 3 N 3 O 3 Cl 3的形式添加次氯酸盐（OCl-）的方法。以灰分中的氨浓度和化学计量为基础，以一定剂量水平的灰分进行氨的完全或部分氧化，以消除或分别减少高pH水泥浆液中的氨气逸出。
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