混凝土品質控制作業問題 - 土木
By Wallis
at 2011-04-27T09:32
at 2011-04-27T09:32
Table of Contents
某工程需要澆置室內柱,欲使用輸氣混凝土(air-entrained concrete)
28 天目標強度達35 MPa.
已知材料性質如下:
水泥: 比重: 3.15
粗粒料: 最大粒徑(max. aggregate size): 27 mm
BSGSSD=2.9 adsorption capacity=0.5% effective absorption=0.3%
dry-rodded unit weight = 1700 kg/m3
細粒料: BSGSSD=2.62 adsorption capacity=1.2% surface moisture=2.8%
fineness modulus=2.8
使用最大容許的坍度條件下,試計算:
(1) SSD 狀態下的配比設計
(2) Stock 狀態下實際的配比
(3) 如果(1)其中的水泥被飛灰(BSG=2.2)以15%的重量百分比所取代,試修正配比設計
(假設不考慮飛灰對28 天強度發展的影響)
--
28 天目標強度達35 MPa.
已知材料性質如下:
水泥: 比重: 3.15
粗粒料: 最大粒徑(max. aggregate size): 27 mm
BSGSSD=2.9 adsorption capacity=0.5% effective absorption=0.3%
dry-rodded unit weight = 1700 kg/m3
細粒料: BSGSSD=2.62 adsorption capacity=1.2% surface moisture=2.8%
fineness modulus=2.8
使用最大容許的坍度條件下,試計算:
(1) SSD 狀態下的配比設計
(2) Stock 狀態下實際的配比
(3) 如果(1)其中的水泥被飛灰(BSG=2.2)以15%的重量百分比所取代,試修正配比設計
(假設不考慮飛灰對28 天強度發展的影響)
--
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土木
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By Skylar DavisLinda
at 2011-04-30T16:22
at 2011-04-30T16:22
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