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    • 9. 发明授权
    • 고점도 콘크리트용 혼화제
    • 高粘度混凝土的特性
    • KR101365974B1
    • 2014-02-24
    • KR1020130066840
    • 2013-06-11
    • 한국건설생활환경시험연구원(주)에이치비티
    • 정상화최영철김경환손석제박성학최연왕
    • C04B28/02C04B18/08C04B24/24C04B24/16
    • Y02W30/92C04B18/08C04B24/161C04B24/243C04B28/02C04B2103/302C04B2103/304C04B2103/408C04B2201/05C04B2201/10
    • The present invention relates to an admixture capable of reducing viscosity of high viscosity concrete according to the increase of fly ash content up to 50% when manufacturing concrete. The present invention provides an admixture for high viscosity concrete wherein 20-40% of a polycarboxylic acid-based water reducing agent, 10-30% of a polycarboxylic acid-based maintaining agent, 0.5-2% of an antifoaming agent, 1-3% of a high dispersion agent and 10-25% of an air entraining agent are included in water, and thereby, overcoming the decrease of workability and production efficiency caused by the viscosity increase of concrete, as well as securing capabilities for stably generating and maintaining foams within ranges in which physical properties of concrete are not affected. Therefore, durability of concrete can be enhanced even when 50% or more fly ash is used. Accordingly, the admixture for high viscosity concrete of the present invention can increase the amount of fly ash used up to 50% on the basis of the weight of cement when manufacturing concrete, and therefore, can recycle resources and secure compressing strength and economic feasibility. [Reference numerals] (AA) Viscosity (cps); (BB) High dispersion agent non-insertion; (CC) High dispersion agent 1%; (DD) High dispersion agent 2%; (EE) High dispersion agent 3%; (FF) High dispersion agent 4%; (GG) High dispersion agent 5%
    • 本发明涉及一种能够在制造混凝土时根据飞灰含量增加高达50%时降低高粘度混凝土的粘度的混合物。 本发明提供了一种高粘度混凝土的混合物,其中20-40%的多元羧酸类减水剂,10-30%的多元羧酸维持剂,0.5-2%的消泡剂,1-3 高分散剂和10-25%的加气剂包含在水中,从而克服由混凝土的粘度增加引起的可加工性和生产效率的降低,以及确保稳定产生和维持的能力 在混凝土的物理性能不受影响的范围内的泡沫。 因此,即使使用50%以上的粉煤灰,也能够提高混凝土的耐久性。 因此,本发明的高粘度混凝土的混合物可以在制造混凝土时基于水泥的重量增加使用的飞灰量高达50%,因此可以回收资源并确保压缩强度和经济可行性。 (标号)(AA)粘度(cps) (BB)高分散剂无插入; (CC)高分散剂1%; (DD)高分散剂2%; (EE)高分散剂3%; (FF)高分散剂4%; (GG)高分散剂5%