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High cement paste solidifying agent

A mud curing agent and high water technology, applied in chemical instruments and methods, wellbore/well parts, applications, etc., can solve the problems of low curing strength, impossibility, slow setting and hardening, etc., achieve good curing effect and simple process , the effect of cost reduction

Inactive Publication Date: 2004-05-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the slow setting and hardening of ordinary cement and lime, they will partially settle before setting in the case of high water-solid ratio, and mud and silt usually contain more organic substances, which will hinder cement. The hydration reaction of the cement can not effectively bond the organic matter cohesive soil, so the curing effect of the high-cement slurry is often poor or even impossible.
Cured strength is lower when lime is used for curing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Figure 1 is the hydration reaction of high cement slurry curing agent. Figure 2 lists the chemical composition of the raw materials used in the implementation.

[0046] Figure 3 is an example of the mass ratio of high cement slurry curing agent. Figure 3 lists the ratio of high cement slurry curing agent and its curing performance. Among them: the curing agent used is made by mixing and grinding, and the specific surface area is 370m 2 / kg: The mud to be solidified is waste mud from an oilfield, with a water content of 200%; the amount of curing agent is 20% (based on the mud quality), and after mixing with the mud evenly, inject 70.7×70.7×70.7mm 3 Cubic mold test, placed in a curing room with a temperature of 20±2°C and a relative humidity above 90% for curing, demoulding after 2 days, continuing curing after demoulding, and measuring the unconfined compressive strength of the solidified mud body at the specified age.

[0047] Figure 4 lists the comparison of the cu...

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Abstract

A high-cement-grout solidifying agent for the sludge or silt with 100-350% of water content is prepared from thioaluminate cement clinker, cube spar and calcium lime through proportionally mixing and grinding. Its advantages are quick solidifying and hardening, and high strength.

Description

Technical field: [0001] The invention relates to a high cement slurry solidifying agent, which is suitable for solidifying treatment of waste mud in oil drilling and geological drilling, and bottom sludge of reservoirs, canals, ponds, weirs, pools, etc., and belongs to the field of civil engineering and building materials. Background technique: [0002] High cement slurry is cohesive soil with a water content much greater than its liquid limit and is in a flowing state, such as oil field or mine waste slurry, farmland, rivers, channels, ponds and other silt, industrial waste liquid, and urban domestic sewage. The soil particles of the filth gradually deposit the sludge formed on the bottom of the water, etc. High-cement slurry can be considered to be mainly composed of extremely small clay mineral particles (less than 0.002mm) and a small amount of silt particles (0.002-0.074mm), and the absolute water content is roughly in the range of 150%-500%. The solidification treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/10E02D3/12E21B33/13
Inventor 李北星王长德
Owner WUHAN UNIV
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