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Grouting material for reinforcing medium-coarse sand layer and preparation method thereof

A technology for grouting materials and coarse sand layers, which is applied in the field of grouting materials for medium and coarse sand layer reinforcement and its preparation, which can solve the problems of low strength, long hardening time, and poor reactivity of building materials, and improve performance uniformity , easy to operate, and prolong the shelf life

Pending Publication Date: 2022-04-15
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of poor reactivity of slag powder in the prior art, low strength, poor fluidity and long hardening time of the prepared building materials, the present invention provides a grouting material for reinforcement of medium-coarse sand layers and a preparation method thereof. The slurry material only uses slag powder as the gelling component of the grouting material. By selecting a specific alkaline activator, the reactivity and hydration efficiency of the slag powder are improved. The prepared grouting material has high early strength and strong fluidity. The hardening time is suitable, which is in line with the construction characteristics of the medium-coarse sand layer reinforcement process

Method used

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  • Grouting material for reinforcing medium-coarse sand layer and preparation method thereof

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Effect test

Embodiment 1

[0021] This embodiment provides a kind of grouting material for reinforcement of medium-coarse sand layer. The raw materials are calculated in parts by mass, including 40 parts of slag micropowder, 24 parts of water, 0.24 parts of water reducer, 1.6 parts of sodium hydroxide, and 1.6 parts of sodium carbonate. , 0.6 parts of calcium hydroxide and 0.5 parts of calcium formate; the slag powder is S95 grade, the water reducer is Sika high-efficiency water reducer, and sodium hydroxide, sodium carbonate, calcium hydroxide and calcium formate are industrially pure.

[0022] The preparation method of the grouting material for strengthening the medium-coarse sand layer specifically includes the following steps:

[0023] S1: Weigh each raw material according to the formula quantity, mix and stir the slag fine powder and the dry water reducer for 15 seconds to obtain a premix;

[0024] S2: Add 18 parts of water to the obtained premix, stir for 1 minute to obtain a premixed slurry, stir...

Embodiment 2

[0027] This embodiment provides a grouting material for medium-coarse sand layer reinforcement. The raw materials are calculated in parts by mass, including 45 parts of slag micropowder, 27 parts of water, 0.27 parts of water reducer, 1.575 parts of sodium hydroxide, and 1.35 parts of sodium carbonate. , 0.45 parts of calcium hydroxide and 0.55 parts of calcium formate; the slag powder is S95 grade, the water reducer is Sika high-efficiency water reducer, and sodium hydroxide, sodium carbonate, calcium hydroxide and calcium formate are industrially pure.

[0028] The preparation method of the grouting material for strengthening the medium-coarse sand layer specifically includes the following steps:

[0029] S1: Weigh each raw material according to the formula quantity, mix and stir the slag fine powder and the dry water reducer for 15 seconds to obtain a premix;

[0030] S2: Add 20 parts of water to the obtained premix, stir for 2 minutes to obtain a premixed slurry, stir and ...

Embodiment 3

[0033] This embodiment provides a grouting material for medium-coarse sand layer reinforcement. The raw materials include 30 parts of slag powder, 18 parts of water, 0.21 parts of water reducer, 0.9 parts of sodium hydroxide, and 0.9 parts of sodium carbonate in parts by mass. , 0.45 parts of calcium hydroxide, 0.3 parts of calcium formate; the slag powder is S95 grade, the water reducer is Sika high-efficiency water reducer, and sodium hydroxide, sodium carbonate, calcium hydroxide and calcium formate are industrially pure.

[0034] The preparation method of the grouting material for strengthening the medium-coarse sand layer specifically includes the following steps:

[0035] S1: Weigh each raw material according to the formula quantity, mix and stir the slag fine powder and the dry water reducer for 18 seconds to obtain a premix;

[0036] S2: Add 14 parts of water to the obtained premix, stir for 2 minutes to obtain a premixed slurry, stir and dissolve sodium hydroxide, sod...

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Abstract

The invention relates to the technical field of building materials, in particular to a grouting material for reinforcing a medium-coarse sand layer and a preparation method thereof.The grouting material is prepared from 30-50 parts of superfine slag powder, 15-45 parts of water, 0.2-0.4 part of a water reducing agent and 1.7-4.5 parts of an alkaline exciting agent, and the alkaline exciting agent is a mixture of sodium hydroxide, sodium carbonate, calcium hydroxide and calcium formate. The superfine slag powder is adopted as a gelling component of the grouting material, the activity of the superfine slag powder is thoroughly excited through the alkaline exciting agent with specific composition, and the defect of the superfine slag powder is overcome by matching with the water reducing agent with specific dosage, so that the prepared grouting material is high in early strength, good in fluidity, appropriate in hardening time and suitable for construction characteristics of a medium-coarse sand layer reinforcing process; and preparation of the building material only by using the superfine slag powder becomes reality.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a grouting material for medium-coarse sand layer reinforcement and a preparation method thereof. Background technique [0002] Slag is a by-product of blast furnace ironmaking. It is a glassy substance that is mostly formed when the molten minerals in blast furnace ironmaking are quenched and quenched by water. Its main components are calcium oxide, magnesium oxide, silicon oxide and aluminum oxide. , accounting for more than 95% of the total. The slag powder after slag grinding can be mixed into cement as a mixed material to realize slag recovery while improving the performance of cement and reducing production costs and energy consumption. [0003] However, because slag micropowder contains a large number of crystals with complete structure, and the content of acidic oxides such as silicon oxide in the composition is higher than that of basic oxides such as calcium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B111/70
Inventor 高振国刘淼王耀高竞驰刘鑫王树栋李文江
Owner SHIJIAZHUANG TIEDAO UNIV
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