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1. 发明专利

JP2003193420A REINFORCING CONSTRUCTION METHOD FOR LOADING METAL PIPE 审中-公开
公开(公告)号：JP2003193420A
公开(公告)日：2003-07-09
申请号：JP2001400111
申请日：2001-12-28
申请人： KAJIMA CORP , MIYAJI IRON WORKS CO LTD
发明人： MARUYAMA KYUICHI , SAKATA NOBORU , YANAI SHUJI , KITAHARA MINORU
IPC分类号： E04G23/02 , E01D1/00 , E01D2/00 , E01D4/00 , E01D22/00 , E01D101/30
摘要： PROBLEM TO BE SOLVED: To improve the load-resistant performance and earthquake-resistant performance of a loading metal pipe such as an arch rib for a bridge with excellent workability under an existing state to the loading metal pipe. SOLUTION: In a reinforcing construction method for the loading metal pipe, a concrete placing port is formed to an existing metal pipe receiving the load of a structure, lightweight aggregate is blended and lightweight and superplasticized concrete having a slump flow value of 50 cm or more is injected into the metal pipe from the concrete placing port, air existing in the pipe is expelled outside the pipe with the placing of concrete and the substantially whole of an in-pipe space is filled with lightweight concrete having the mass of unit volume of 1.8 t/m 3 or less. COPYRIGHT: (C)2003,JPO

2. 发明专利

JPH11322396A HIGH-FLUIDITY CONCRETE HAVING SLIGHT DRYING SHRINKAGE 失效
公开(公告)号：JPH11322396A
公开(公告)日：1999-11-24
申请号：JP14671098
申请日：1998-05-13
申请人： KAJIMA CORP
发明人： MARUYAMA KYUICHI , MIDORIKAWA TAKEHIKO , SAKATA NOBORU
IPC分类号： C04B18/04 , C04B28/02
摘要： PROBLEM TO BE SOLVED: To obtain a high-fluidity concrete capable of being solidly placed in a high-density bar arrangement part and a complicated shape part and eliminating a compacting operation, by using powder of sludge molten slag as fine powder in a high-fluidity concrete having a specific slump and a prescribed slump flow value. SOLUTION: The high-fluidity concrete having a slight drying shrinkage is formed by mixing water with a cement, a fine aggregate, a coarse aggregate, fine powder, a dispersant and a thickening agent. Powder of sludge molten slag is mixed in the concrete as the whole or a part of the fine powder to secure >=24 cm slump and >=50 cm slump flow value. Preferably, the powder of the sludge molten slug is spherical ash. Preferably a high-performance AE water-reducing agent is used as the dispersant and a wellan gum is used as the thickening agent. Preferably 5-60 wt.% of the total of the cement and the fine powder is powder of the sludge molten slug. Consequently, the cracking resistance of the high-fluidity concrete is increased.

3. 发明专利

JPH10280687A CONCRETE PLACEMENT METHOD 失效
公开(公告)号：JPH10280687A
公开(公告)日：1998-10-20
申请号：JP10078297
申请日：1997-04-04
申请人： KAJIMA CORP
发明人： SHIGEMATSU KAZUO , MARUYAMA KYUICHI , SAKATA NOBORU , OUCHI HITOSHI
IPC分类号： E02B7/00 , E04G21/02
摘要： PROBLEM TO BE SOLVED: To construct a mass concrete structure of the required strength at high workability by applying the constitution that high fluidity concrete having the prescribed slump flow range is placed in the placement space of existing concrete in advance, and curing the high fluidity concrete after supplying coarse aggregate thereto. SOLUTION: First, placement space 2 using existing concrete 1 as a bottom part is formed, and the side of the space 2 is made by use of a form. At the process of the prior placement of high fluidity concrete, preferably lime stone powder or the like is used to substitute a part of cement and high fluidity concrete 3 blended with a thickener and prepared to have a slump flow between 60 and 80 cm is placed in the space 2. Thereafter but before the lapse of long time, coarse aggregate 4 is supplied to the high fluidity concrete 3 from an upper position. As a result, the level of the placed concrete rises and in this case, placement height after the supply of the coarse aggregate 4 is preferably set at a level approximately between 50 and 100 cm.

4. 发明专利

JPH1058430A ADDITIVE FOR CONCRETE 失效
公开(公告)号：JPH1058430A
公开(公告)日：1998-03-03
申请号：JP24250796
申请日：1996-08-27
申请人： KAJIMA CORP , SANSHO CO
发明人： MARUYAMA KYUICHI , SAKATA NOBORU , YOSHIZAKI MASATO
IPC分类号： C04B14/06 , B28C7/00 , C04B14/28 , C04B24/22 , C04B24/38 , C04B40/00 , C04B40/06 , C04B103/32 , C04B103/44 , C08L101/00 , C08L101/14
摘要： PROBLEM TO BE SOLVED: To facilitate to calculate the amt. of addition of a thickener and to uniformly disperse the thickener into concrete by using a mixture of powdery thickener and inorg. powder under a condition where they are wrapped with a water-soluble film as an additive for concrete. SOLUTION: Powdery thickener is premixed with inorg. powder and packs wherein the mixed powder is respectively wrapped with a water-soluble film e.g. by a unit of 100g-2kg are prepd. and these packs being enough to the amt. of aimed addition of the thickener are fed into a mixer during kneading concrete. Doing like this, the water-soluble film is gradually dissolved in the concrete during kneading and the mixed powder is made to flow out and the thickener is uniformly dispersed in the concrete to obtain highly fluid concrete with stabilized viscosity and good quality. In addition, it is possible to accurately grasp the amt. of addition of the thickener to the concrete wherein any type of dispersing agent is compounded.

5. 发明专利

JPH10146823A CEMENT FOR MANUFACTURING AE CONCRETE 失效
公开(公告)号：JPH10146823A
公开(公告)日：1998-06-02
申请号：JP31861496
申请日：1996-11-15
申请人： KAJIMA CORP , SANSHO CO
发明人： MARUYAMA KYUICHI , SAKATA NOBORU , YOSHIZAKI MASATO
IPC分类号： C04B28/00 , B28C7/00 , C04B28/04
摘要： PROBLEM TO BE SOLVED: To realize a way to add a mixture as is under the state in its pulverulent body to a mixer at the kneading of an AE concrete by a method wherein the mixture is prepared by mixing powdered AE agent, water reducing agent, AE water reducing agent or high-efficiency water reducing agent as is under powdered state to cement powder at a desired mixing ratio in advance. SOLUTION: A cement for AE concrete consists of a mixed powder of a powdered chemical admixture selected from a group consisting of AE agent, water reducing agent, AE water reducing agent or high-efficiency water reducing agent, inorganic powder selected from a group consisting of stone dust, blast furnace slag powder and fly ash and cement powder. By mixing the mixed powder and the cement powder with a mixing machine such as a ribbon blender or the like after the mixed powder is prepared by mixing the powdered admisture and the inorganic powder in advance, the dispersion of the admixture becomes favorable. Further, when its mixing ratio is set to correspond to the ratio of admixture to cement to be mixed at the kneading of an AE concrete, no measurement of the adding ratio at a ready-mixed concrete factory becomes necessary, resulting in realizing a practical operational convenience.

6. 发明专利

JPH09301760A EARTHQUAKE-RESISTANT FOUNDATION STRUCTURE OF HIGH FLOOR TYPE BUILDING 失效
公开(公告)号：JPH09301760A
公开(公告)日：1997-11-25
申请号：JP14234596
申请日：1996-05-14
申请人： KAJIMA CORP , KANETSU KOGYO
发明人： MARUYAMA KYUICHI , SAKATA NOBORU , YOSHINO TAKAHARU
IPC分类号： E02D27/34 , C04B28/02
摘要： PROBLEM TO BE SOLVED: To provide a structure having good earthquake resistance without changing thickness of the foundation of a high floor type building. SOLUTION: This structure, i.e., reinforced concrete foundation structure having a =1.0m height is constructed by using highly flowable concrete having a 65 to 75 slump flow and performing a reinforcing bar arrangement of =450kg/cm , and mixing the base mix with a >=0.1 to 4.5wt.% high performance water reducing agent or high performance AE water reducing agent (air entraining and water reducing agent) per unit weight of cement and >=0.01 to 0.5wt.% biogum per unit weight of water.

7. 发明专利

JPH0921797A METHOD FOR EVALUATING MATERIAL SEPARATION OF HIGHLY FLUIDIZED CONCRETE 失效
公开(公告)号：JPH0921797A
公开(公告)日：1997-01-21
申请号：JP19101695
申请日：1995-07-05
申请人： KAJIMA CORP
发明人： MARUYAMA KYUICHI , SAKATA NOBORU
IPC分类号： G01N33/38 , E04G21/00
摘要： PROBLEM TO BE SOLVED: To establish a simple testing method for determining the degree of material separation of a highly fluidized concrete. SOLUTION: When manufacturing a highly fluidized concrete where a high- performance water-reducing agent is blended, concrete is loaded into a specific mold, a specific water-adsorbing sheet is brought into contact with the entire upper surface of the concrete in the mold, the contact state is maintained for a certain time, the water-absorbing sheet is peeled off, the amount of absorption to the sheet is obtained from the weight difference of the sheet before and after the test, and the amount of absorption is used as a target for separating the material of concrete.

8. 发明专利

JPH10146822A CEMENT FOR MANUFACTURING HIGHLY FLUID CONCRETE 失效
公开(公告)号：JPH10146822A
公开(公告)日：1998-06-02
申请号：JP31858796
申请日：1996-11-15
申请人： KAJIMA CORP , SANSHO CO
发明人： MARUYAMA KYUICHI , SAKATA NOBORU , YOSHIZAKI MASATO
IPC分类号： E04G21/02 , B28C7/00 , C04B28/02 , C04B28/04
摘要： PROBLEM TO BE SOLVED: To realize a way to add a mixed powdery cement under the powdery state to a mixer at the kneading of a highly fluid concrete by a method wherein an inorganic powder, a high-efficiency water reducing agent and a thickener are mixed under the powdered state to cement powder at a desired mixing ratio in advance. SOLUTION: Into a normal portland cement powder serving as a main body, an inorganic powder selected from a group consisting of stone dust, a blast furnace slag powder and fly ash, a high-efficiency water reducing agent powder and a thickener powder are mixed at desired ratios. In order to mix, first of all, the powdered high-range water reducing agent, thickener and inorganic powder are mixed with one another at a desired mixing ratio. Next, by mixing the resultant mixed powder with cement powder, the dispersion of an admixture in the cement powder becomes favorable. In this cement for manufacturing highly fluid concrete, troublesome operations such as the meterings of various admixtures and chemical admixtures at the manufacturing of highly fluid concrete in a ready-mixed concrete factory can be omitted and, at the same time, high quality highly fluid concrete can be manufactured.

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