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1. 发明专利

JP2001062823A MANUFACTURE OF CONCRETE HAVING EARLY STRENGTH DEVELOPING PROPERTY 失效
公开(公告)号：JP2001062823A
公开(公告)日：2001-03-13
申请号：JP24613899
申请日：1999-08-31
申请人： KAJIMA CORP , SHIMIZU CONSTRUCTION CO LTD , NMB KK
发明人： YODA KAZUHISA , NABESHIMA TAKEHIKO , NAGURA KENJI , SUGIBASHI NAOYUKI , UMEZAWA KENICHI , IWANAGA TOYOJI
IPC分类号： E04G21/02 , B28C5/42 , B28C7/04 , C04B24/22 , C04B40/00
摘要： PROBLEM TO BE SOLVED: To develope a necessary early strength by a very simple prescription by a method wherein a base concrete is produced by blending a high performance AE water reducing admixture, and further the high performance AE water reducing admixture is added to the concrete. SOLUTION: For Hc preparation concrete, a high performance AE water reducing admixture is blended to produce a base concrete of 10-15 cm of object slump in a ready-mixed concrete preparing plant. Then, the base concrete is carried to a placement field by an agitator car, and a high performance AE water reducing admixture is added to the base concrete in the agitator car to make a fluid concrete of an object slamp of 15-21 cm is placed, thus, at least 0.05 N/mm2 of strength in 4h wood-age is satisfied. By adjusting a blending ratio of divided addition of the high performance AE water reducing admixture, total additional amount, time for divided addition or the like according to the execution of the work, early strength and fluidity suitable for the execution of work can be obtained.

2. 发明专利

JP2000327450A CONCRETE PLACING METHOD 失效
公开(公告)号：JP2000327450A
公开(公告)日：2000-11-28
申请号：JP13200399
申请日：1999-05-12
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： NAGURA KENJI , ETO MASAMITSU
IPC分类号： C04B40/02
摘要： PROBLEM TO BE SOLVED: To executed the sure control and prevention of temperature crack in a concrete placing method. SOLUTION: The method for placing the concrete by controlling the temperature crack generated in the concrete has an aging stage for installing a pipe to a concrete placing region, placing the concrete and aging this concrete. This aging stage has a heat supplying stage for passing a feed heat medium to the pipe to supply heat to the concrete at the time of a temperature fall after the temperature elevation by placing of the concrete, thereby suppressing the temperature fall.

3. 发明专利

JP2000248743A MASS CONCRETE PLACING METHOD 失效
公开(公告)号：JP2000248743A
公开(公告)日：2000-09-12
申请号：JP5516999
申请日：1999-03-03
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ETO MASAMITSU , NAGURA KENJI , MARUYAMA KYUICHI
IPC分类号： E04G21/02
摘要： PROBLEM TO BE SOLVED: To restrain the width of crack caused on a structure surface below a specific value by forming a lower layer concrete layer using ordinary Portland cement in a lower layer in the whole layer thickness of a mat, and layering a concrete layer using low heating cement on the lower layer concrete layer. SOLUTION: In a mat-like concrete main body 10, a concrete lower layer 11 using ordinary Portland cement is placed on the ground. A concrete surface layer 12 using low heating Portland cement is placed on the concrete lower layer 11. Then, the ordinary concrete layer 11 is set to a layer thickness H1, and is integrally placed on the ground. This layer 11 is continuously placed by being divided into several layers so that a horizontal placing joint is not formed. Then, the low heating concrete layer 12 is continuously placed. In that case, the concrete layer 12 is set to H2, and a ratio to the whole layer thickness H is set to 15 to 10 % to thereby sufficiently control the occurrence of surface crack and the crack width.

4. 发明专利

JPH08209813A WATERPROOF CRACK INDUCING JOINT STRUCTURE 失效
公开(公告)号：JPH08209813A
公开(公告)日：1996-08-13
申请号：JP4141295
申请日：1995-02-07
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ONO SADAMU , ETO MASAMITSU , NAGURA KENJI
IPC分类号： E04B1/62 , E04B1/64
摘要： PURPOSE: To expect both the induction of cracks and the waterproof effect and dispense with the installation of a water stop plate by forming an inducing member into a waterproof structure. CONSTITUTION: A crack inducing member 13 is installed on the inside of a crack inducing joint 12 provided in the longitudinal direction of a wall-shaped structure 11. The crack inducing member 13 is constituted of a pair of plates 14, 14 and an elastic water stop material 15 held between the plates 14, 14. The crack inducing member 13 is installed so that the water stop material 15 is faced to the bottom face 12a of the crack inducing joint 12.

5. 发明专利

JPH06330627A CONCRETE FORCE-FEEDING DEVICE IN UNDERGROUND CONCRETE STRUCTURE 失效
公开(公告)号：JPH06330627A
公开(公告)日：1994-11-29
申请号：JP12296693
申请日：1993-05-25
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： TAKIZAWA FUMIO , NAKAMURA RYUICHI , WAGA HIDEETSU , NAGURA KENJI
IPC分类号： E04G21/02
摘要： PURPOSE:To prevent air from intruding into the concrete inside vertically arranged piping, when high-strength concrete is forcedly fed, and thereby to prevent the separation of concrete components and the clogging of the piping due to the separation. CONSTITUTION:A rotary valve 20 for closing a piping 11 is provided in the lower piping part 15 of the piping 11 for transporting concrete, and the rotary valve 20 is set so as to be opened while the concrete pump 18 mounted on a ready-mixed concrete transportation vehicle 12 is driven. The rotary valve 20 is also set so as to be closed when the concrete pump 18 is stopped.

6. 发明专利

JP2002303093A METHOD AND DEVICE FOR SURVEYING CAVITY OF STRUCTURE 失效
公开(公告)号：JP2002303093A
公开(公告)日：2002-10-18
申请号：JP2001110354
申请日：2001-04-09
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： KONO SHIGEYUKI , NAGURA KENJI , SAWADA MASAO
IPC分类号： E21D9/06
摘要： PROBLEM TO BE SOLVED: To easily estimate the position and dimensions of a cavity with high accuracy, even at a place where the accuracy of a geophysical exploration method cannot be expected, without adversely affecting a structure in terms of strength and management. SOLUTION: The presence or absence of the cavity V and the dimensions thereof are estimated from variation in reaction and a torque load, which act on a chisel 2 during the boring, and moving dimensions of an end of the chisel 2 while boring a hole with the chisel 2 in a position of an object of a survey on the cavity V of a lining concrete C.

7. 发明专利

JPH10220030A CONCRETE STRUCTURE REINFORCED WITH STEEL SHEET LINING AND EXECUTION METHOD THEREOF 失效
公开(公告)号：JPH10220030A
公开(公告)日：1998-08-18
申请号：JP2761497
申请日：1997-02-12
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： NAGURA KENJI
IPC分类号： E04G23/02
摘要： PROBLEM TO BE SOLVED: To provide an execution method of steel sheet lining, in which mortar is sufficiently filled with no hindrance to fluidity of the motor and is prevented from being degraded due to a loss of moisture. SOLUTION: An existing concrete structure 1 is wound around its outer peripheral surface with a sheet or coated thereover with a water-tight sealant so as to form a moisture absorption preventing layer 2. Thereafter, the concrete structure 1 is lined with a steel sheet 3 there around and mortar is filled in a gap therebetween. With the provision of the water absorption preventing layer 2, no moisture is lost from the mortar 4, and accordingly, the fluidity and filling ability are ensured for the mortar, thereby it is possible to obtain an earthquake-proof structure as designed, and to prevent the quality of the mortar 4 from being degraded.

8. 发明专利

JPS6274603A METHOD AND DEVICE FOR COOLING CONCRETE MATERIAL 失效
公开(公告)号：JPS6274603A
公开(公告)日：1987-04-06
申请号：JP21720585
申请日：1985-09-30
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ONO SADAMU , YOSHINOUCHI SHINJI , NAGURA KENJI
IPC分类号： B28C7/00 , F25D3/10

9. 发明专利

JP2016002655A セメントコンクリートの製造方法审中-公开
公开(公告)号：JP2016002655A
公开(公告)日：2016-01-12
申请号：JP2014122087
申请日：2014-06-13
申请人： DENKA CO LTD , SHIMIZU CONSTRUCTION CO LTD
发明人： TSUJINO MASATO , HASHIDA HIROSHI , YUASA TATSUKI , NAGURA KENJI , MORIOKA MINORU , HIGUCHI TAKAYUKI , SASAKI TAKASHI , MASHITA MASAAKI
IPC分类号： B28C7/12 , C04B22/06 , C04B22/14 , C04B24/02 , C04B24/18 , C04B24/26 , C04B24/32 , C04B28/02
摘要：【課題】品質の安定した膨張性や低乾燥収縮性を有するコンクリートを、建設現場で製造することが可能となり、使いたい場所にだけ自在に打設することができる膨張低収縮のセメントコンクリートを提供する。【解決手段】生コンプラントでレディミクストコンクリートを調製し、現場まで搬送した後に、膨張材と非水系溶液で調製した、スラリー粘度0.4〜9.0Pa・sのスラリーを、アジテータ車に投入して混合撹拌する膨張低収縮のセメントコンクリートの製造方法である。【選択図】なし

10. 发明专利

JP2000007407A CONCRETE FOR PACKING IN TUBULAR ELEMENT 失效
公开(公告)号：JP2000007407A
公开(公告)日：2000-01-11
申请号：JP18119098
申请日：1998-06-26
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： KUMANO TOMOJI , KAWAI TORU , NAGURA KENJI , MIYASE FUMIHIRO
IPC分类号： C04B28/02 , E04G21/02
摘要： PROBLEM TO BE SOLVED: To make it possible to well place concrete into an element which is formed to a tubular shape and is extended and arranged in a horizontal direction without the occurrence of material sepn. by grouting the concrete specified in slump flow value and plastic viscosity into the element. SOLUTION: The slump flow value of the concrete grouted into the element of 20 to 40 m in the length which is formed to the tubular shape and is extended and arranged in the horizontal direction is set at 55 to 65 cm and the plastic viscosity thereof at 65 to 72 Pa/s. The concrete composed of cement, water, fine aggregate, coarse aggregate and admixture is used as the concrete for grouting. Portland cement, white cement, etc. are used for the cement and city water is used for the water. Mounting sand, crushed sand, etc. are used for the fine aggregate and crushed stones, gravel, etc. for the coarse aggregate. Further, a high-performance AE water-reducing agent (polycarboxylic acid system, etc.), is used for enhancing fluidity and the admixture (fine powder of blast furnace slag, etc.), thickener (glycol-based thickener, etc.), are used in order to impart a material sepn. resistance characteristics.

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