High-compactness cement paste for vacuum grouting and manufacturing method thereof

A technology of cement paste and manufacturing method, which is applied to the manufacture of vacuum grouting cement paste, vacuum grouting cement paste, and grouting materials for prestressing systems in civil construction projects, and can solve the problem of increasing secondary grouting links and unfavorable prestress Project construction quality control, cumbersome process and other issues, to achieve the effect of reducing investment, improving compactness, and low bleeding rate
CN102432250AActive Publication Date: 2012-05-02CHINA NUCLEAR IND HUAXING CONSTR +1
4 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NUCLEAR IND HUAXING CONSTR
Publication Date
2012-05-02
Patent Text Reader

Abstract

The invention provides high-compactness cement paste for vacuum grouting and a manufacturing method thereof, and belongs to the technical field of pre-stress engineering. The manufacturing method comprises the following steps of 1, preparing 300 parts by weight of portland cement, 2.7 to 3.9 parts by weight of a polycarboxylic acid water reducer, 1.5 to 2.4 parts by weight of a polycarboxylic acid retarder, 93 to 99 parts by weight of water and 3 to 6 parts by weight of a paste thixotropic agent, 2, pouring water into a paste agitator tank, and simultaneously, adding the polycarboxylic acid water reducer and the polycarboxylic acid retarder into the paste agitator tank, and uniformly mixing, 3, adding cement with stirring and continuously stirring to obtain retarded paste, wherein the total time of feeding and stirring is in a range of 4 to 6 minutes, 4, putting the retarded paste into a paste storage tank with a stirrer and standing for 1 hour, and 5, starting the stirrer for stirring, adding the paste thixotropic agent into the retarded paste with stirring, and after addition of the paste thixotropic agent, sequentially stirring for 15 to 30 seconds to obtain thixotropic paste. The thixotropic paste can realize single-step grouting formation of a pipe having a high bending degree and thus work efficiency and construction quality are greatly improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a high-density vacuum grouting cement paste. The cement paste is a material for grouting prestressed pipes in nuclear power plants. It is especially suitable for grouting bent pipes with a height difference of more than 1.2 meters, and is also suitable for prestressed pipes in civil construction projects. System grouting materials. The invention also relates to a method for manufacturing a high-density vacuum grouting cement paste, which belongs to the technical field of prestressed engineering. Background technique

[0002] The steel beams of the prestressing system of nuclear power plants are generally divided into horizontal steel beams, vertical steel beams, and gamma steel beams. These steel beams are all prestressed by post-tensioning. In order to prevent the external harmful medium from eroding the prestressed steel strand and ensure the design life of the prestressed project, it is necessary to fill the prestressed tun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More