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1. 发明专利

JPH09267002A TREATMENT OF MUDDY WATER FROM AGGREGATE PLANT 失效
公开(公告)号：JPH09267002A
公开(公告)日：1997-10-14
申请号：JP10195296
申请日：1996-04-01
申请人： KAJIMA CORP , SANSHO CO
发明人： FUJISAKA YASUSHI , TAJIMA NAOKI , SATOU TOSHIYUKI , OUCHI HITOSHI , SAKATA NOBORU , MINAMI MASAYOSHI , YOSHIZAKI MASATO
IPC分类号： B01D21/01 , C02F1/56
摘要： PROBLEM TO BE SOLVED: To inexpensively and effectively treat muddy water when subjecting muddy water generated in an aggregate plant to flocculation treatment by using a muddy water treating agent by using a cation denatured derivative of guar gum as the muddy water treating agent. SOLUTION: When subjecting muddy water generated in an aggregate plant to flocculation treatment by using a muddy water treating agent, a cation denatured derivative of guar gum is used as the muddy water treating agent. The cation denatured derivative is that which is formed by reacting guar gum (galactomannan) with 2,3-epoxypropyltrimethylammonium chloride as a reaction agent with the substitution degree of about 0.13. In practice, it is preferable that an inexpensive assistant, polyaluminum chloride, is used to perform primary flocculation and then the cation denatured derivative is used to perform final flocculation. In this way, muddy water generated from an aggregate plant in which raw stone is crushed, washed and classified is inexpensively and effectively treated.

2. 发明专利

JPH08245251A PRODUCTION OF DAM CONCRETE 失效
公开(公告)号：JPH08245251A
公开(公告)日：1996-09-24
申请号：JP7835995
申请日：1995-03-10
申请人： KAJIMA CORP , SANSHO CO , KAO CORP
发明人： TAJIMA NAOKI , OUCHI HITOSHI , SAKATA NOBORU , MINAMI MASAYOSHI , YOSHIZAKI MASATO
IPC分类号： C04B24/38 , B28C7/02 , C04B28/02
摘要： PURPOSE: To assure sufficient strength and workability even if a unit cement quantity relating to a temp. stress is decreased by decreasing the unit cement quantity and compounding a high-performance water-reducing agent or the high-performance water-reducing agent and welan gum. CONSTITUTION: The unit cement quantity is made smaller by >=10kg/m than the design compounding and the high-performance water-reducing agent, such as β-naphthalene sulfonnate, etc., is compounded at 0.01 to 0.1wt.% and the welan gum at 0 to 0.1wt.% of the unit water volume, by which the unit cement quantity is decreased to and the unit water volume for obtaining prescribed slump is decreased by 5 to 10kg/m at the time of producing dam concrete by mixing the necessary unit cement quantity under compounding design of the slump value of 0 to 6cm to obtain the dam concrete having the target strength. As a result, the water cement ratio does not increase and the compressive strength does not degrade even if the unit cement quantity is decreased by about 10 to 20kg/m . The degradation in viscosity is suppressed and the cost reduction is attained by addition of an admixture (high-performance water-reducing agent + welan gum).

3. 发明专利

JPH10140540A CONCRETE EXECUTION METHOD 失效
公开(公告)号：JPH10140540A
公开(公告)日：1998-05-26
申请号：JP31861296
申请日：1996-11-15
申请人： KAJIMA CORP
发明人： SAKATA NOBORU , OUCHI HITOSHI , SATOU TOSHIYUKI , TAJIMA NAOKI , KUDO KAZUMA
IPC分类号： E02B7/02 , E02B7/00 , E04G21/02
摘要： PROBLEM TO BE SOLVED: To execute a mass concrete structure having required strength with excellent workability by successively repeating a process, in which a unit placing space is formed onto existing concrete by using burying type forms and coarse aggregate is charged and the clearances of the coarse aggregate are filled with high superplasticized concrete, as one unit. SOLUTION: A unit placing space 4 is formed by employing burying type forms 3, and other side walls are formed by the forms 3 while using the wall of the existing concrete 2 of a side section as one of the side walls. When coarse aggregate 5 is charged completely, clearances among the coarse aggregate 5 are filled with high superplasticized concrete having self-filling properties. An injection pipe 6 reaching the lower section of the layer of the coarse aggregate 5 is inserted beforehand at the time of the injection of concrete, and concrete is flowed among the coarse aggregate 5 through the infection pipe 6. The coarse aggregate 5 and filled concrete are unified by utilizing the excellent filling properties of high superplasticized concrete having self-filling properties for executing mass concrete, and a firm mass concrete structure can be built.

4. 发明专利

JPH0892941A AUTOMATIC WET SCREENING METHOD FOR DAM CONCRETE 失效
公开(公告)号：JPH0892941A
公开(公告)日：1996-04-09
申请号：JP22754094
申请日：1994-09-22
申请人： KAJIMA CORP
发明人： TAJIMA NAOKI , SATOU TOSHIYUKI , ISHIDA SHIZUO , FUJISAKA YASUSHI , TAN HIDEO
IPC分类号： E02B7/00
摘要： PURPOSE: To automate hard work so as to release workers therefrom and enhance work efficiency and save manpower as well. CONSTITUTION: Concrete from a hopper 4 of a butcher plant is received with a movable hopper 2 and carried over to a vibro-screen 1. The concrete is screened in automatic mode with the vibration given by a screening motion of the vibro-screen 1. The screened coarse aggregates 14 are automatically removed by taking off a partition plate.

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