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Environment-friendly type slurry compound curing agent

A composite curing agent and environmentally friendly technology, applied in the field of civil construction materials, can solve problems such as slow hydration speed, and achieve the effect of early strength guarantee, later strength guarantee, and favorable curing stability.

Inactive Publication Date: 2018-10-19
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydration rate of this material is slow, and its activity can only be stimulated in a specific environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] An environment-friendly mud composite curing agent, comprising the following components, each component is composed of dry powder mass percentage:

[0038] Slag: 30%;

[0039] Fly ash: 10%;

[0040] Carbide slag: 15%;

[0041] Magnesium oxide: 15%;

[0042] Sodium polyacrylate: 0.2%;

[0043] Silica fume: 8%;

[0044] Magnesium Chloride: 10%

[0045] Na 2 SO 4 : 11.8%.

[0046] The environment-friendly mud composite curing agent configured according to this ratio is mixed with 200kg of curing agent per cubic meter of mud, and the initial moisture content of the mud is set to 70%. After the mud and curing agent are evenly stirred, the prepared The samples were removed from the mold after 1 day of standard curing, and the curing was continued to 7 days and 28 days, and three parallel samples were used for each age to test the unconfined compressive strength. The average strength of solidified sludge can reach 3.64MPa in the 7-day curing period, and 7.97MPa in the 2...

Embodiment 2

[0048] An environment-friendly mud composite curing agent, comprising the following components, each component is composed of dry powder mass percentage:

[0049] Slag: 35%;

[0050] Steel slag: 10%;

[0051] Magnesium Oxide: 12%

[0052] Carbide slag: 18%;

[0053] Sodium polyacrylate: 0.1%;

[0054] Silicon fume: 12%;

[0055] Magnesium chloride: 5%

[0056] Na 2 SO 4 : 7.9%.

[0057] The environment-friendly mud composite curing agent configured according to this ratio is mixed with 200kg of curing agent per cubic meter of mud, and the initial moisture content of the mud is set to 70%. After the mud and curing agent are evenly stirred, the prepared The samples were removed from the mold after 1 day of standard curing, and the curing was continued to 7 days and 28 days, and three parallel samples were used for each age to test the unconfined compressive strength. The average strength of solidified sludge can reach 4.31MPa in the 7-day curing age, and the average str...

Embodiment 3

[0059] An environment-friendly mud composite curing agent, comprising the following components, each component is composed of dry powder mass percentage:

[0060] Slag: 25%;

[0061] Fly ash: 15%;

[0062] Steel slag: 10%;

[0063] Carbide slag: 15%;

[0064] Magnesium oxide: 15%;

[0065] Sodium polyacrylate: 0.2%;

[0066] Silica fume: 6%;

[0067] Magnesium Chloride: 4%

[0068] Na 2 SO 4 : 9.8%.

[0069] The environment-friendly mud composite curing agent configured according to this ratio is mixed with 200kg of curing agent per cubic meter of mud, and the initial moisture content of the mud is set to 70%. After the mud and curing agent are evenly stirred, the prepared The samples were removed from the mold after 1 day of standard curing, and the curing was continued to 7 days and 28 days. Three parallel samples were used for each age to test the unconfined compressive strength. The average strength of solidified sludge can reach 3.22MPa in the 7-day curing age, ...

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Abstract

The invention discloses an environment-friendly type slurry compound curing agent. The environment-friendly type slurry compound curing agent is prepared from the following dry powder raw materials: mineral slag or a mineral slag composition, carbide slag, Na2SO4, magnesium oxide, magnesium chloride, silicon powder and sodium polyacrylate, wherein the mineral slag composition is a mixture of the mineral slag and fly ash, or a mixture of the mineral slag and steel slag, or a mixture of the mineral slag, the fly ash and the steel slag. According to the curing agent prepared by the invention, thetechnical problem that slurry is difficult to cure stably under the condition that the moisture content is high is solved; after the curing agent which accounts for 35 percent of the dry weight of the slurry is added, the 7-day strength of the slurry with the moisture content of 70 percent can reach 40 Mpa or more; a manner of replacing traditional cement-based curing with industrial wastes including the fly ash, the silicon powder, the carbide slag, the mineral slag and the steel slag is sufficiently utilized, so that the energy consumption and the emission of CO2 are effectively reduced; meanwhile, novel green materials including the magnesium chloride, the magnesium oxide and the like are added, so that the early-period and later-period strength and stability of drilling slurry are easy to improve; the curing agent is convenient to transport or meets the requirements of engineering filling under the condition of meeting economical and environment-friendly requirements.

Description

technical field [0001] The invention relates to an environment-friendly mud composite curing agent, which is suitable for curing waste mud in oil drilling and geological drilling, and belongs to the field of civil engineering and building materials. Background technique [0002] During drilling operations, the waste drilling mud has the characteristics of large amount of use, complex chemical composition, and many types. Therefore, it is quite difficult to deal with the waste drilling mud. At present, many measures are taken for these muds, but considering economic benefits, Only a small part will be recycled and reused, and the vast majority will be directly discharged into the environment, or simply treated by natural evaporation, precipitation, consolidation, and burying nearby. According to statistics, my country's annual emissions are about 2-3 million m 3 Waste mud, 1 / 3 of which is directly discharged into the environment. These muds have high clay content and low st...

Claims

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Application Information

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IPC IPC(8): C04B28/32
CPCC04B28/32C04B2111/00784C04B2201/50C04B18/141C04B18/08C04B22/0006C04B18/146C04B22/147C04B24/2641
Inventor 王东星胡旭伍林峰高向雲杜怡莹
Owner WUHAN UNIV
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