Concrete composition using blast furnace slag composition
一种混凝土组合物、高炉渣的技术，应用在水泥生产等方向，能够解决不能确保施工性、难以抑制硬化体干燥收缩率、硬化体压缩强度降低增大等问题，达到抑制干燥收缩、良好施工性、抑制流动性的降低的效果
Inactive Publication Date: 2014-10-29
TAKEMOTO YUSHI KK
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Problems solved by technology
However, in these conventional proposals, if the amount of blast furnace slag fine powder used is actually increased, 1) good workability cannot be ensured, 2) it is difficult to suppress the drying shrinkage of the hardened body, and 3) the decrease in the compressive strength of the hardened body increases. and other issues that in some respects pose significant obstacles
Method used
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Embodiment 1～36
[0068] Under the blending conditions recorded in Table 3, each specified amount of mixing water (tap water), blast furnace slag composition, and fine aggregate (river sand produced in the Oi River system, density=2.58) was dropped into a 50-liter pot-type forced mixer. g / cm 3 ), in addition to adding a specified amount of mixed materials such as cement dispersant, drying shrinkage reducing agent, and expansion material, and further adding an air volume regulator (AE agent manufactured by Takemoto Oil Co., Ltd., trade name AE-300), kneading for 45 seconds. Finally, put in a specified amount of coarse aggregate (crushed stone from Okazaki, density = 2.68g / cm 3 ), mixed for 60 seconds to manufacture a concrete composition with a target slump of 18 ± 1 cm and a target air volume of 4.5 ± 1% water / blast furnace slag composition mass ratio of 45% or 40%.
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Abstract
Concrete compositions including a binder, water, a fine aggregate, a coarse aggregate and an admixture are provided. The binder is formed with a blast-furnace slag composition including 100 mass parts of a mixture of 80-95 mass % of blast-furnace slag fine particles with fineness 3000-13000 cm2 / g and 5-20 mass parts of gypsum for a total of 100 mass % and 0.5-1.5 mass parts or 5-45 mass parts of an alkaline stimulant. Such concrete compositions can maintain superior operability by reducing the discharged amount of carbon dioxide and the decrease with time in fluidity and air content of the prepared concrete compositions. They can also reduce the drying shrinkage of the obtained hardened objects and allow the obtained hardened objects to manifest necessary strength.
Description
technical field [0001] The present invention relates to a concrete composition obtained using a blast furnace slag composition. In recent years, there has been an increasing demand for reduction of carbon dioxide emissions and improvement of energy consumption efficiency. In view of the foregoing, in the field of concrete compositions, granulated blast furnace slag (blast furnace castor slag) by-produced from ironworks is effectively used as a raw material of blast furnace slag cement in the form of blast furnace slag fine powder. Blast furnace slag cement, which is usually used in concrete compositions, is manufactured by mixing blast furnace slag fine powder with ordinary Portland cement. According to JIS-R5211, it is classified into type A (more than 5% to 30%), Type B (over 30% to 60%), and Type C (over 60% to 70%). The above-mentioned blast furnace slag cement has the following advantages: low heat of hydration, large increase in long-term strength (strength), high wate...
Claims
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IPC IPC(8): C04B28/08C04B7/02C04B22/06C04B22/14C04B24/26C04B24/32
CPCC04B2103/50C04B2111/34C04B28/08C04B7/19Y02P40/10C04B7/02C04B22/143C04B24/2647C04B24/32C04B7/21C04B18/141C04B22/144C04B24/26C04B28/04
Inventor 米泽敏男三井健郎井上和政池尾阳作和地正浩莲见孝志木之下光男齐藤和秀黑田萌玉木伸二
Owner TAKEMOTO YUSHI KK