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Sewer well treatment method and fast-setting cement mortar dry blend

A technology of fast-setting cement and cement mortar, which is applied to waterway systems, water supply devices, drainage structures, etc., to achieve the effects of increasing foundation strength, enhancing cohesion, and avoiding structural collapse

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in urban sewer wells and the deficiencies of existing treatment methods, the present invention provides a treatment method for sewer wells and a quick-setting cement mortar dry mix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 22 kg of rapid-hardening sulfoaluminate cement with a strength grade of 425, 15 kg of ordinary Portland cement with a strength grade of 525, 55 kg of quartz sand, 6 kg of U-type expansion agent, 1.0 kg of naphthalene-based high-efficiency water reducer, oxidized Calcium 1.0 kg is added together in the mixer, and released after stirring evenly to obtain the super early strength rapid hardening cement mortar dry mix of the present invention. The properties of cement mortar are listed in Table 1.

Embodiment 2

[0047] Weigh 40 kg of rapid-hardening sulfoaluminate cement with a strength grade of 525, 6 kg of ordinary Portland cement with a strength grade of 425, 50 kg of river sand, 3 kg of U-type expansion agent, 0.5 kg of naphthalene-based high-efficiency water reducer, oxidized Calcium 0.5 kg, add in the mixer together, release after stirring evenly, obtain super-early-strength rapid-hardening cement mortar dry mix of the present invention. The properties of cement mortar are listed in Table 1.

Embodiment 3

[0049] Weigh 30 kg of rapid-hardening sulfoaluminate cement with a strength grade of 625, 11 kg of ordinary Portland cement with a strength grade of 625, 53 kg of sea sand, 4.5 kg of U-type expansion agent, 0.8 kg of naphthalene-based high-efficiency water reducer, and oxidized Calcium 0.7 kg is added in the mixer together, is released after stirring evenly, obtains super-early-strength rapid-hardening cement mortar dry mix of the present invention. The properties of cement mortar are listed in Table 1.

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Abstract

The invention discloses a sewer well treatment method and a fast-setting cement mortar dry blend. The sewer well treatment method includes the steps of (1) carrying out cutting to form an annular zone around a sunk sewer well cover, and taking out the sewer well cover, (2) digging out basic layer materials of the annular zone, placing a prefabricated piece at an opening of a sewer well, placing the well cover on the prefabricated piece, and adjusting the horizontal position to enable the upper surface of the well cover to be flush with the road surface, and (3) pouring the annular zone dug out around the prefabricated piece with fast-setting cement mortar. According to the sewer well treatment method, the strength of a structure around the sewer well is improved, rainwater is prevented from permeating the sewer well, and the sinking problem of the urban sewer well can be effectively solved. The construction speed is high, and traffic is not influenced. The fast-setting cement mortar dry blend comprises cement, sand, expanding agents, water reducing agents, calcium oxide and the like. The sewer well treatment method and the fast-setting cement mortar dry blend are suitable for treating the sewer well of the cement road surface and the sewer well of the pitch road surface.

Description

technical field [0001] The invention relates to a treatment method for urban sewer wells and a quick-setting cement mortar dry mix. The method and the dry mixture are not only suitable for the treatment of water wells under cement pavement, but also suitable for the treatment of water wells under asphalt pavement. Background technique [0002] At present, the sewer wells in urban streets in our country are prone to subsidence, which affects the smoothness of the road surface and forms a traffic hazard. The main reason is that the area around the sewer well is a weak link. The continuous rolling and vibration of vehicles will cause the edge of the sewer well to settle, resulting in a "belly button" phenomenon on the road surface. The usual method is to lay bricks, backfill soil, add pads and other methods. The bricklaying method adopted in the past, under the rolling and vibration of passing vehicles, the bricklaying is easy to crush or fall off, causing structural deformat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03F5/04C04B28/06
Inventor 陈保莲宁爱民李志军程国香范思远张静陈闯
Owner CHINA PETROLEUM & CHEM CORP
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