Weight aggregate and weight concrete

    公开(公告)号:JP4253355B1

    公开(公告)日:2009-04-08

    申请号:JP2008135958

    申请日:2008-05-23

    摘要: 【課題】セメントペーストとの材料分離を生じ難い重量細骨材及び重量骨材、並びにそれらの重量細骨材及び重量骨材を用いた重量コンクリートを提供する。
    【解決手段】重量細骨材が、粒径0.15mm未満の骨材を20質量%以上含み、かつ粒径2.5mm以上5mm未満の骨材を20質量%以上含む。 これにより、重量コンクリートに配合した際に、骨材とセメントペーストとの材料分離を効果的に抑制することができるとともに、函体への充填用重量コンクリートに配合した際には、函体への充填率を効果的に向上させることができる。
    【選択図】なし

    Quality method of determining the aggregate

    公开(公告)号:JP5296589B2

    公开(公告)日:2013-09-25

    申请号:JP2009081681

    申请日:2009-03-30

    IPC分类号: C04B14/02 B28C7/00 E04G21/02

    摘要: PROBLEM TO BE SOLVED: To provide a method of deciding the quality of aggregate, by which performance of the aggregate difficult to be decided only from the test performance table of the aggregate when the aggregate is used for concrete or mortar is predicted, and the influence of variation of the quality of the aggregate or the change of the production distinct exerted on the property of the concrete or the mortar is predicted, for nearly equal kind of or the same kind of the aggregate. SOLUTION: The method of deciding the quality of the aggregate includes: estimating the performance of the aggregate from the previously obtained standardized data of concrete or mortar each produced under a prescribed condition which is preliminarily obtained, when coarse aggregate or fine aggregate is made the object aggregate and the objective aggregate is used for the concrete or the mortar; and estimating the performance of coarse aggregate for obtaining standardized data on the basis of the standardized data of ordinary concrete produced under a prescribed condition and high strength concrete produced under the prescribed condition, and estimating the fine aggregate for obtaining standardized data on the basis of the standardized data of mortar produced under a prescribed condition. COPYRIGHT: (C)2011,JPO&INPIT