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Collapsible loess reinforcing grouting slurry, preparation method and application thereof

A collapsible loess and grouting technology, applied in construction, building maintenance, building construction, etc., can solve the problems of uneven mixing of carbon dioxide and water glass, weaken the foundation reinforcement effect, affect the reinforcement effect, etc., and achieve good low temperature resistance. , good wear resistance, low cost effect

Active Publication Date: 2019-02-22
南京康泰建筑灌浆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The construction procedure of "water glass + carbon dioxide" silicification method is to inject carbon dioxide gas into the foundation first, then inject water glass slurry, and finally inject carbon dioxide gas. This alternate injection construction procedure not only makes the carbon dioxide and water glass mix unevenly, It directly affects the reinforcement effect, and any foundation that undergoes collapsible deformation will produce a large number of gaps or cracks. When the foundation is reinforced, the first injection of carbon dioxide gas will inevitably run away part or most of the gaps or cracks. , the water glass and carbon dioxide gas injected later will also escape partly, which also affects or weakens the effect of foundation reinforcement

Method used

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  • Collapsible loess reinforcing grouting slurry, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0020] A collapsible loess reinforcement grout, comprising the following components by weight ratio: 30 parts of Portland cement, 160 parts of fine aggregate, 80 parts of cementitious material, 15 parts of bentonite, 5 parts of paraffin, and 10 parts of magnetic powder , 2 parts of external admixture, 35 parts of water, the density of the above components after mixing is 2100kg / m 3 .

[0021] Among them, the fine aggregate is natural sand. The magnetic powder is manganese zinc ferrite powder, the external dopant is sodium hydroxide and sodium chloride, and the cementitious material is fly ash.

[0022] The preparation method of the collapsible loess reinforcement grouting slurry comprises the following steps:

[0023] Step 1: Weigh according to the above group distribution ratio;

[0024] Step 2: Mix the magnetic particles, the external admixture and an appropriate amount of water with each other, stir evenly, and make a mixed solution for later use;

[0025] Step 3: Add b...

Embodiment 2

[0028] A collapsible loess reinforcement grouting slurry with magnetically sensitive thickening effect comprises the following components according to the weight ratio:

[0029] 32 parts of ordinary Portland cement, 168 parts of fine aggregate, 85 parts of cementitious material, 16 parts of bentonite, 7 parts of paraffin, 11 parts of magnetic powder, 4 parts of external admixture, 37 parts of water, and the mixing material of the above components The final density is 2250kg / m 3 .

[0030] Among them, the fine aggregate is artificial sand. The magnetic powder is manganese zinc ferrite powder, the external dopant is potassium hydroxide and calcium chloride solution, and the cementitious material is fly ash.

[0031] The preparation method and application of the collapsible loess reinforcement grouting slurry with magnetically sensitive thickening effect are the same as those in Example 1.

Embodiment 3

[0033] A collapsible loess reinforcement grouting slurry with magnetically sensitive thickening effect comprises the following components according to the weight ratio:

[0034] 34 parts of ordinary Portland cement, 175 parts of fine aggregate, 89 parts of cementitious material, 17 parts of bentonite, 9 parts of paraffin, 12 parts of magnetic powder, 3 parts of external admixture, 40 parts of water, after mixing the above components The density is 2400kg / m 3 .

[0035] Among them, the fine aggregate is natural sand. The magnetic powder is manganese zinc ferrite powder, the external dopant is calcium hydroxide and sodium chloride solution, and the cementitious material is fly ash.

[0036] The preparation method and application of the collapsible loess reinforcement grouting slurry with magnetically sensitive thickening effect are the same as those in Example 1.

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Abstract

The invention relates to collapsible loess reinforcing grouting slurry. The collapsible loess reinforcing grouting slurry comprises the following components in parts by weight: 30-40 parts of Portlandcement, 160-210 parts of fine aggregate, 70-100 parts of a gel material, 15-20 parts of bentonite, 5-15 parts of paraffin, 10-15 parts of magnetic powder, 2-10 parts of additive, and 35-47 parts of water; the density of the mixture obtained by mixing the components is 2050-2800 kg / m<3>. The collapsible loess reinforcing grouting slurry is capable of improving and reinforcing a loess foundation; the slurry is simple to prepare, convenient to construct, and low in manufacturing cost; the viscosity of the slurry can be changed by applying an additive magnetic field as required, to meet the requirements of various foundation conditions.

Description

technical field [0001] The invention belongs to the technical field of construction mortar, and relates to a collapsible loess reinforcement grouting slurry, a preparation method and an application thereof. Background technique [0002] Collapsible loess is a special type of soil distributed in northern China, such as Shaanxi, Shanxi, Gansu, Xinjiang, Qinghai, Henan, and Hebei. When collapsible loess is used as the foundation, it will subside after soaking in water, which will have great impact on engineering construction. hazards. If buildings, structures, roads, railways, bridges and other engineering constructions are located on collapsible loess, the collapsible loess must be treated to eliminate its collapsible characteristics and meet the safety requirements of engineering construction. At present, the silicification reinforcement method is widely used. Using it to treat the collapsible loess foundation under the existing buildings can completely eliminate the collaps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E02D35/00E04G23/02
CPCC04B28/04C04B2111/00732E02D35/005E04G23/0211C04B14/06C04B18/085C04B14/104C04B24/36C04B14/363C04B22/062C04B22/124C04B22/064
Inventor 郭超陆征然惠志婷朱璧禾于红梅张茂胜赵明歌王倩倩
Owner 南京康泰建筑灌浆科技有限公司
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